INSTALLATION AND SERVICE INSTRUCTIONS

BLACKSTONE AUTOMATIC WASHERS

MODELS BA 500, 600/650, 750

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TABLE OF CONTENTS

DESCRIPTION AND SPECIFICATIONS

General..................................................

Model BA 500 ............................................

Model BA 600/650 ........................................

Model BA 750 ............................................

Specifications...........................................

INSPECTION, UNCRATING AND INSTALLATION

Inspection...............................................

Uncrating....................................... . . . .

Installation.............................................

SERVICE OF CABINET, TUB AND TANK ASSEMBLIES

Agitator (All Models)....................................

Front Panel and Cabinet Top..............................

Control Enclosure........................................

Spinner Tub Assembly.....................................

Side Panels..............................................

Rear Panel...............................................

Collector Tank Assembly..................................

SERVICE OF THE ELECTRICAL SYSTEM

General...................................................

Timer Function...........................................

Timer (All Models)........................................

Model BA 500 Temperature Switch...........................

Model BA 600/650 Temperature Switch.......................

Model BA 600/650 Motor Speed Switch.......................

Program Switch (Model BA 750 Only) .......................

Water Valve (All Models)..................................

Motor (Model BA 500)......................................

Motor (Models BA 600/650 and 750).........................

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SERVICE OF THE MECHANICAL SYSTEM

General.......................................

Operation of the Transmission.................

Motor Drive...................................

Gear Train....................................

Clutch Assembly ..............................

Pinion Seal ..................................

Brake Assembly................................

Agitator Shaft................................

Agitator Shaft Seal...........................

Agitator Shaft Bearings.......................

Agitator Wearing Ring.........................

Support Shaft Assembly........................

Main Seal.....................................

Pump Assembly.................................

SECTION VI. TROUBLE SHOOTING

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SECTION I. DESCRIPTION AND SPECIFICATIONS

1. GENERAL

This manual covers instructions for three different models of Blackstone Automatic Washers. Dimensionally, all three models are alike. All three have the same mechanical system; the main differences will be found in their controls and programming features. All models have reversing motors that rotate clockwise during agitation and counterclockwise during spin. NOTE: Model BA 650 is the same as Model BA 600 except that it has a stainless steel tub.

3. MODEL BA 600/650

This model provides two washing cycles and a soak cycle. It has two agitation and spin speeds (normal) and (slow) obtained through a direct belted two-speed motor. It offers four combinations of wash and rinse water temperatures, and a choice of two combinations of wash and spin speeds.

The cycle control permits the operator to select any washing period up to 14 minutes in the regular cycle, and up to 6 minutes in the special cycle. Any part of any cycle can be shortened, skipped, lengthened or repeated. Water level, during the "fill" phase, is controlled by time.

2. MODEL BA 500

This model provides two washing cycles (regular) and (special) and a soak cycle. Its water temperature selector offers two combinations of wash and rinse water. The cycle control permits the operator to select any washing period up to 14 minutes in the regular cycle, and up to 6 minutes in the special cycle. Any part of any cycle can be shortened, skipped, lengthened or repeated. Water level, during the "fill" phase, is controlled by time.

4. MODEL BA 750

This model has pushbutton controls for selection of water temperature and agitation and spin speeds. See Par. 5e. Two washing cycles and a soak cycle are provided.

The cycle control permits the operator to sel-lect any washing period up to I4minutes in the regular cycle, and up to 6 minutes in the special cycle. Any part of any cycle can be shortened, skipped, lengthened or repeated. Water level, during the "fill" phase, is controlled by time.

Model BA 750 recirculates water from the collector tank during the "wash" and "agitated rinse" phases of the automatic cycle. This model is also equipped with a stainless steel tub with sediment ejector.

A bleach dispenser under the lid conveys liquid bleach directly into the collector tank.

5. SPECIFICATIONS

(a) Tub Capacity: BA 500, 600/650- 15.00

gallons.

BA 750- 18.75 gallons, including overflow.

(b) Motor: ½hp, 115 volt, 60 cycle, capacitor start with thermoprotector.

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(c) Agitation Speed: Normal setting - 68

oscillations per minute ( all models).

Slow setting - 45 oscillations per minute (BA600/650 and 750).

(d) Spin Speed: Normal setting - 680 rpm

(all models).

Slow setting - 450 rpm (BA600/650 and 750).

(e) Cycles and Speeds:

BA 500: Two cycle-Regular, special and soak.

Single speed-Normal agitation, normal spin.

BA 600/650: Two cycle-Regular, special and soak.

Two speed-Normal and slow agitation.

-Normal and slow spin.

BA 750: Two cycle-Regular, special and soak.

Two speed-Agitation, spin speed and water temperature controlled by program switch.

(f) Dimensions: Refer to Paragraph 1 and Figure 1.

CYCLE BUTTON FABRICS WASH TEMP. WASH SPEED RINSE TEMP. SPIN SPEED
1 COTTONS, LINENS WHITES & COLOR FAST HEAVY SOIL WARM RINSE HOT NORMAL WARM NORMAL
2 COTTONS, LINENS WHITES & COLORFAST HEAVY SOIL COLD RINSE HOT NORMAL COLD NORMAL
3 COTTONS, LINENS DARK & NON-COLORFAST MEDIUM SOIL COLD RINSE WARM NORMAL COLD NORMAL
4 WASH AND WEAR DURABLES HEAVY-MEDIUM SOIL HOT NORMAL COLD SLOW
5 WASH AND WEAR DELICATE FRAGILE WASHABLES WOOLENS WARM SLOW COLD SLOW
6 COLD WATER WASH NON-COLORFAST LIGHT SOIL COLD NORMAL COLD SLOW

PROGRAM SWITCH

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MODEL BA 600/650 Figure 3

MODEL BA 750 Figure 4

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SECTION II. INSPECTION, UNCRATING AND INSTALLATION

6. INSPECTION

Blackstone washers are shipped from the factory in a completely sealed, heavy duty corrugated carton. A careful inspection of the carton should be made immediately upon receipt of shipment. If external damage is detected before uncrating, the shipment should not be accepted until a claim is filed. In case there is concealed damage, not apparent at the time of delivery, a claim should also be filed as quickly as possible.

Iris the responsibility of the consignee to file claim for transportation damage. An immediate contact should be made with the transportation company and they will advise procedure and supply necessary forms.

Figure 6

7. UNCRATING

Cut the strap at the bottom of the shipping crate (Fig. 6). Carefully lift crate from cabinet of washer. Remove cardboard packing from within tub as follows (Fig. 7):

1. Remove cap screw and washer (1).

2. Remove shipping pad (2).

3. Remove hoses from inside of tub, and packaged installation kit consisting of the following parts:

4-hex lock nuts for leveling legs 4-foot pads for leveling legs 4-hose washers for inlet hoses 1-hose clamp for discharge hose 1 - agitator cap

4. Install agitator cap on agitator post.

Figure 7

5. Tip washer over, remove four leveling legs and remove crate bottom (Fig. 8). Do not lift washer by control enclosure. Discard washers. Protect cabinet finish at all times. Be sure lock nuts are in place on leveling legs and replace leveling legs in base of washer (Fig. 9).

8. INSTALLATION

1. Install washers in both ends of two inlet hoses and attach to the water valve of the washer. Caution should be observed to prevent cross threading of hose couplings and nylon connection of water valve. Attach hose carrying hot water line to connection marked "HOT", and cold water hose to other connection.

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Figure 9

Place hose clamp on discharge hose and install hose. Position clamp over outlet pipe on washer. The gooseneck drain hose should empty at a point preferably no higher than the top of the cabinet (Fig. 10).

Figure 10

2. Washer must be level on solid floor on all four leveling legs. Place a carpenter's level on the top of the cabinet and adjust the leveling legs until unit stands level in both directions (Fig. 11). IMPORTANT: All locknuts should be securely tightened.

3. Place leveling leg foot pads under each leg after washer is in desired position.

4. Ground the washer. All Blackstone automatic washers are equipped with a seven-foot, plug-in type, three-wire service cord for 115-volt, 60-cycle AC circuit. If a three-prong grounded wall receptacle is not available, the machine must be grounded by attaching a No. 18 copper wire to rear panel screw and clamping the other end to cold water pipe, using regulation ground clamp.

6. Check electrical connections. Make sure that an electrical outlet is within reach of the cord on the machine; also that no other appliances are connected on the same line. Full rated voltage is essential for satisfactory operation. Be sure to comply with local plumbing and electrical codes.

5. Make sure there are no kinks in the hoses to impede the flow of water entering or being discharged from the machine.

7. Check the water level. Since all Black-stone washers employ a "timed" fill, the a-mount of water entering the tub during the fill cycle is controlled by a special flow washer in the water valve. After installing the washer, put it through a test cycle. Observe the water level after the initial fill.

It should be just above the top of the agitator fins. If level is too low, check the water pressure. If less than 20 pounds, replace the flow washer with one of larger aperture. (See instructions in Par. 42).

Refer to the Use and Care Manual for information on operation and maintenance.

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SECTION III. SERVICE OF CABINET, TUB AND TANK ASSEMBLIES

9. AGITATOR (ALL MODELS)

a. Removal. Unscrew the agitator cap by turning counterclockwise. Lift out agitator.

b. Replacement. Make certain that center post is free of dirt and grease. Place agitator on post and tighten cap.

Figure 12

10. FRONT PANEL AND CABINET TOP

a. General. Front panel must first be removed before top or any other panel can be removed. Side panels can be removed with the top in place.

b. Removal.

1. Loosen the two cap screws (1) (Fig. 12) located under the edge of the toe recess; pull bottom of panel forward and remove.

Figure 14

2. Remove the three screws (1) (Fig. 13) which secure the cabinet top to the rear panel.

3. Remove the two screws (1) (Fig. 14) which secure the top holddown straps (2) to the front support panel (3). Unhook the holddown straps from the front support panel 'and remove.

4. Unplug the wiring harness connection

(1) (Fig. 15) and lift off the complete cabinet top assembly.

c. Replacement. Replace in reverse order of b above.

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11. CONTROL ENCLOSURE (FIG. 15)

a. Removal. Remove four hex nuts (2) from underside of cabinet top and lift off control enclosure while sliding the wiring harness and connector through hole (3).

b. Replacement. Replace in reverse order of sl_ above

12. SPINNER TUB ASSEMBLY (FIG. 16)

a. Removal.

(1) Remove six Phillips head screws (1) in bottom of tub. These screws secure the tub to the transmission.

(2) Lift out tub.

b. Replacement. Before replacing, make certain that rubber gaskets are free of foreign matter. Replace in reverse order of a above.

Figure 16

13. SIDE PANELS

a. Removal.

(1) Remove front panel (Par. 10b( 1)).

(2) Remove three screws (1) (Fig. 17) from front edge of side panel.

(3) Remove three screws (2) (Fig. 13) at bottom edge of side panel.

(4) Remove four screws (3) at rear vertical edge of side panel.

(5) Remove the panel.

b. Replacement. Replace in reverse order of a above.

Figure 17

14. REAR PANEL (FIG. 13)

a. General. Ordinarily the rear panel will not have to be removed for servicing the washer.

If necessary, it may be removed as follows:

b. Removal.

(1) Remove front panel and top (Par. 10).

(2) Remove 11 screws (3) (Fig. 13) and

(4) which secure the rear panel to the side panels and base assembly.

(3) Remove spinner tub assembly (Par. 12).

(4) From inside of collector tank, remove Phillips head screws (5) (Fig. 13) which secure tank to rear panel.

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(5) Remove two screws (1) (Fig. 18) and 15. release water inlet bracket (vacuum

breaker assembly) from the panel.

(6) Remove two screws (2) (Fig. 18) and release water valve assembly from panel.

(7) Release wiring harness connector by removing two spring clips (1) (Fig. 19). Connector can then be removed downward from opening in bracket. NOTE: Clips are separate from connector.

Figure 19

COLLECTOR TANK ASSEMBLY a. Removal.

(1) Remove front panel and top (Par. 10).

(2) Remove spinner tub assembly (Par. 12).

(3) Remove water inlet hose (1) (Fig. 20) and collector tank drain hose clamp (1) (Fig. 21).

On Model 750, also remove recirculation hose (2) (Fig. 20).

(4) Remove belt, loosen set screw (1)

(Fig. 23), and remove main drive pulley and retaining washer.

(5) Lift transmission from support tube.

(6) Loosen and remove diaphragm clamp

(1) (Fig. 22).

(7) With finger tips, free diaphragm skirt from collector tank flange.

(8) Grasp brake and seal support (2)

(Fig. 22) and jerk upwards.

(9) Remove three Phillips head screws

(1) (Fig. 24) from inside of tank.

(10) Remove upper two screws (1) (Fig. 17), pull side panel clear and swing cross brace away from collector tank.

(8) Draw panel away from machine, loosen clamp and remove drain hose from discharge bracket.

(9) Remove panel.

c. Replacement. Replace in reverse order of_b above. When replacing wiring harness connector, hold connector in position in bracket and insert spring clips one at a time.

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(11) Lift tank up and out of cabinet. NOTE: When removing collector tank, exercise care so as not to damage wires or terminals.

b. Replacement. Replace in reverse order of a above.

Figure 23

Figure 24

Figure 22

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SECTION IV. SERVICE OF THE ELECTRICAL SYSTEM

CAUTION

BEFORE STARTING ANY WORK ON THE ELECTRICAL SYSTEM, DISCONNECT THE WASHER FROM POWER SUPPLY. EACH COMPONENT MUST BE ISOLATED BEFORE TESTING.

16. GENERAL

During the one year warranty period, defective components may be returned to the factory as a complete unit for credit or replacement, providing they have not been damaged through attempted repair.

After the warranty period, parts are available for repair of the water valve. All tests described in this section can be made with a 115 volt live test lamp (Fig. 28) and a live test cord.

17. TIMER FUNCTION

This device automatically controls the individual phases of the complete operating cycle of the washer. The timer is a motor-driven switch with multiple contacts actuated by a series of cams. REPAIRS ARE NOT TO BE ATTEMPTED. If defective, replace the complete unit. See Paragraph 40.

Wiring Diagram MODEL BA 500 Figure 25

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Wiring Diagram MODEL BA 600/650 Figure 26

Wiring Diagram MODEL BA 750 Figure 27

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6 WATT-120 VOLT BULB

MALE PLUG

LIGHT SOCKET WIBE TO ONE SIDE OF Z WISE COBD

Figure 28

18. TIMER (ALL MODELS)

a. Removal

(1) Remove control knobs with a 5/64" Allen wrench.

(2) Remove four screws (1) (Fig. 29) from ends of panel and pull frame and panel from enclosure.

(3) Remove two screws (1) (Fig. 30) which secure timer to enclosure bracket.

(4) Disconnect wires at timer.

b. Replacement. Replace in reverse order

of a above. Refer to wiring diagram when rewiring timer.

any step the lamp does not light, then circuit is broken and entire switch assembly must be re-placed.

(1) Set toggle for Hot Wash-Warm Rinse. Apply test probes to common (center) terminal and corresponding side terminal.

(2) Set toggle for Warm Wash-Cold Rinse. Apply test probes to common (center) terminal and corresponding side terminal.

c. Removal

(1) Remove control panel (Par. 18a(1) and (2)).

(2) Remove switch nut, remove switch, and disconnect wires.

d. Replacement. Replace in reverse order ofx above.

Figure 29

19. MODEL BA 500 TEMPERATURE SWITCH

a. Description. This is a two-position toggle switch which controls the temperature of the wash and rinse water.

b^ Testing. To check continuity of current through the switch, use a live test lamp (Fig. 28). Plug into an electrical outlet and proceed as below. The test lamp should light at each step given, indicating completion of the circuit. If at

20. MODEL BA 600/650 TEMPERATURE SWITCH

a. Description. This is a four-position rotary type switch which controls the temperature of the wash and rinse water.

b. Testing. To check continuity of current through the switch, use a live test lamp (Fig. 28). Plug into an electrical outlet and proceed as below. The test lamp should light at each step given, indicating completion of the circuit. If at any step the lamp does not light, then circuit is broken and entire switch assembly must be replaced.

(1) Set knob to Hot Wash-Med. Rinse.

Apply test probes to terminals L and 2.

(2) Set knob to Med. Wash-Med. Rinse.

Apply test probes to terminals L and 1

and to L and 2.

(3) Set knob to Med. Wash-Cold Rinse.

Apply test probes to terminals L and 1.

Figure 30

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c. Removal.

(1) Remove control panel (Par. 18a_(l) and (2).

(2) Remove switch nut and remove switch from enclosure bracket.

(3) Disconnect wires.

d. Replacement. Replace is reverse order of c above.

21. MODEL BA 600/650 MOTOR SPEED SWITCH

a. Description. This is a two-position toggle switch which controls the agitation and spin speeds during the operating cycle.

Jb. Testing. To check continuity of current through the switch, use a live test lamp (Fig. 28). Plug into an electrical outlet and proceed as below. The test lamp should light at each step given indicating completion of the circuit. If at any step the lamp does not light, then circuit is broken and entire switch assembly must be replaced.

(1) Set toggle for Normal Speed. Apply test probes to common (center) terminal and corresponding side terminal.

(2) Set toggle for Slow Speed. Apply test probes to common (center) terminal and corresponding side terminal.

c. Removal.

(1) Remove control panel (Par. 18a (1) and (2).

(2) Remove switch nut, remove switch, and disconnect wires.

d. Replacement. Replace in reverse order of c_ above.

22. PROGRAM SWITCH (MODEL BA 750 ONLY)

a. Description. This is a six-pushbutton switch which controls wash and rinse temperatures and the agitation and spin speeds during the operating cycle.

b. Testing. To check continuity of current through the switch, use a live test lamp (Fig. 28). Plug into an electrical outlet and proceed as below. The test lamp should light at each step given, indicating completion of the circuit. If at any step the lamp does not light, the circuit is broken and entire switch assembly must be re-placed.

(1) Depress button No. 1. Apply test probes to terminals S and 3, A and 3,

L and X, and L and H.

(2) Depress button No. 2. Apply test probes to terminals S and 3, A and 3, and L and H.

(3) Depress button No. 3. Apply test probes to terminals S and 3, A and 3,

L and W, and L and H.

(4) Depress button No. 4. Apply test probes to terminals S and 7, A and 3, and L and H.

(5) Depress button No. 5. Apply test probes to terminals S and 7, A and 7,

L and W, and L and H.

(6) Depress button No. 6. Apply test probes to terminals S and 7, A and 3, and L and W.

If lamp fails to light at any one of the 21 check points, program switch must be replaced.

c. Removal.

(1) Remove control panel (Par. 18a(l) and (2)).

(2) Remove buttons 1 and 6.

(3) Remove two screws (2) (Fig. 30).

(4) Withdraw switch and disconnect wires.

d. Replacement. Replace in reverse order of c above.

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23. WATER VALVE (ALL MODELS)

a. Description. This is a solenoid actuated mixing valve (Fig. 31). When temperature control is set at HOT, hot water valve is fully open; when set at COLD, cold water valve is fully open; when set at MEDIUM, both valves are fully open. Both hot and cold intake connections are fitted with screens accessible by removing the hoses. These should be inspected for accumulations of dirt and foreign matter. The screens can be removed with a needle or other pointed instrument (Fig. 32).

b. Testing Solenoids.

(1) Remove front panel and cabinet top (Par. 10b).

(2) Disconnect wire leads, and with water pressure on the valve, apply 115 volt current to both terminals of the hot water solenoid (Fig. 31). Hot water should enter the tub.

(3) Repeat same test on cold water solenoid. Cold water should enter the tub.

(4) If test fails, the defective solenoid should be replaced.

c. Removal of Valve.

(1) Remove three screws (2) (Fig. 18), lift valve clear of cabinet and disconnect hose.

(2) Remove valve.

(3) Remove defective solenoid (Fig. 33).

d. Disassembly and Cleaning. The valve may be disassembled, inspected and cleaned if necessary after prolonged use. Inspect for line deposits on armature and solenoid guide; dirt particles on diaphragm seat. Replace parts as required. An exploded view is provided in Fig. 33 to assist in disassembly and reassembly.

e. Replacement. Replace in reverse order of c_ above.

24. MOTOR (MODEL BA 500)

a. Description. This is a ½hp, 115 volt,

60 cycle, capacitor start, single speed reversing motor with thermal overload protection.

b. Testing.

(1) Remove front panel (Par. 10b(l)).

(2) Disconnect wire leads.

(3) To check wash cycle, connect LI to white terminal; L2 to black and brown terminals. Connect red to yellow terminal and plug in test line. Motor should run clockwise at shaft end.

(4) To check spin cycle, connect LI to white terminal; L2 to red and black terminals. Connect yellow to brown terminal and plug in test line. Motor should run counterclockwise at shaft end.

c. Removal (Fig. 35).

(1) Tilt machine backwards and remove belts.

(2) Remove four "conelok" nuts and flat washers.

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(3) Lift motor from cabinet.

d. Replacement. Replace in reverse order of c above, replacing vibration dampener assembly on motor mounting studs.

25. MOTOR (MODELS BA 600/650 AND 750)

a. Description. This is a ½hp, 115 volt,

60 cycle, capacitor start, two speed reversing motor with dual thermo protector.

b. Testing.

(1) Remove front panel (Par. 10b(1)).

(2) Disconnect wire leads.

(3) To check wash cycle (clockwise rotation):

Normal - Connect LI to white; L2 to black and brown. Connect red to yellow.

Plug in test line. Motor should run clockwise.

Slow - Connect LI to white; L 2 to blue and brown. Connect red to yellow. Plug in test line. Motor should run counterclockwise.

(4) To check spin cycle (counterclockwise rotation):

Normal - Connect LI to white; L2 to black and red. Connect brown to yellow.

Plug in test line. Motor should run counterclock wi se.

Slow - Connect LI to white; L2 to blue and red. Connect brown to yellow. Plug in test line. Motor should run counterclockwise.

c. Removal (Fig. 35).

(1) Tilt machine backwards and remove belts.

(2) Remove four "conelok" nuts and flat washers.

(3) Lift motor from cabinet.

d. Replacement. Replace in reverse order

of_c_above, replacing vibration dampener assembly on motor mounting studs. Figure 35

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SECTION V. SERVICE OF THE MECHANICAL SYSTEM

26. GENERAL

Since the service instructions in this section will sometimes involve considerable tear-down of the machine, the major subassemblies are discussed in logical order of disassembly. Replacement instructions are given for each component as discussed in the text, although this information will not be applied until the ultimate point of tear-down is reached.

27. OPERATION OF THE TRANSMISSION

The washer drive is entirely mechanical. The motor, in clockwise rotation, drives the transmission pinion shaft through belt and pulleys. This rotation produces an eccentric operation of the gear'train, resulting in agitator action of 68 oscillations per minute.

During the spin phase, motor rotation is counterclockwise. Rotation in this direction causes a concentric motion of the gear train which stops agitation. Action of a lift screw within the clutch assembly lifts the transmission clear of the brake plate and causes a gradual torque action of the disc clutch, starting the transmission and tub in spin rotation.

At the completion of the spin phase, the timer turns the motor off, causing the lift screw to lower the transmission into contact with the brake friction disc. The resulting friction stops the spin action.

28. MOTOR DRIVE

a. Description (Fig. 35). The motor shaft is equipped with a double pulley - - one groove accommodating a V-belt to the main drive pulley; the other, a round elastic belt to the pump. Belt tension for the main drive is adjusted by swinging the motor in the base slots. Pump belt is elastic and is self-adjusting.

b. Main Drive Belt Adjustment.

(1) Tilt the machine backwards and • brace at a 45 0 angle. In this position, the tub falls against the rear wall of the collector tank.

(2) Loosen conelok nuts (Fig. 35).

(3) With finger pressure midway between pulleys, adjust as shown in Fig. 36.

(4) Tighten nuts.

c. Main Drive Belt Replacement. Remove pump belt. It will stretch sufficiently for easy removal. Main drive V-belt easily removed by slipping it off at main drive pulley.

d. Pump Belt Replacement. See "c" above.

29. GEAR TRAIN

a. Description. The gear train comprises a segment gear (1) (Fig. 37), a main drive gear (2),

a connecting rod (3) and an eccentric (4). A spring

(5) and friction plug (6) are assembled within the eccentric as a backlash dampener.

This assembly is housed in the lower half of the transmission case (Fig. 39).

b. Removal and Disassembly.

(1) Remove front panel and cabinet top (Par. 10).

(2) Remove spinner tub assembly (Par. 12a).

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Figure 38

(3) Remove six 1/2" h ex head cap screws which secure top to lower half of transmission case. These screws come up from lower half of transmission housing.

(4) Lift off top half of transmission and discard gasket.

(5) Remove gear train by lifting upward. Caution should be exercised when removing eccentric from connecting rod to avoid losing spring (5) and friction plug

(6) (Fig. 37).

(6) If transmission is to be removed, see Paragraph 15a (4) and (5).

c. Reassembly and Replacement.

(1) When reassembling the eccentric to the main drive gear, be sure the single lug of the eccentric is located as shown

in Fig. 38. If this eccentric is not properly positioned on the main drive gear, a very short agitation stroke will result.

(2) Replace in reverse order of b above, using a new transmission gasket.

NOTE: Transmission case contains 3-3/4 pints of SAE No. 20 motor oil. Proper oil level is approximately 1/16" below gasket.

Figure 40

30. CLUTCH ASSEMBLY

a. Description (Fig. 40). This assembly is secured to the lower half of the transmission case directly below the gear train, and is accessible after removal of the gear train (Par. 29).

b. Removal and Disassembly.

(1) Remove four cap screws (1) (Fig. 40).

(2) Lift off pressure plate (l)(Fig. 42), and two remaining components can be lifted out together.

c. Inspection (Fig. 42). Examine clutch facings and be sure that facings are tightly riveted to the plate. Facings measuring less than 3/32" thick should be replaced. Replace as necessary.

d. Reassembly and Replacement (Fig. 42).

(1) Install lift screw (3).

(2) Install clutch plate (2) on lift screw.

(3) Install pressure plate (1) and tighten four cap screws securely.

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31. PINION SEAL

a. Description. These two neoprene seals (Fig. 41) are located at the bottom of the spin tube. They prevent oil from escaping from the transmission.

b. Removal. With transmission removed (Par. 15a.(1) thru (5)), proceed as follows:

(1) Remove upper half of transmission case (Par. 29b.(3) and (4)).

(2) Remove gear train (Par. 29b(5)).

(3) Remove clutch assembly (Par. 30_b

(1) and (2)).

(4) Pull out pinion shaft (Fig. 41).

(5) Using small blade screwdriver, pry out seal.

c. Replacement. Press new seals in tube

until flush with tube end and then replace in reverse order of b above. CAUTION: When remov-

ing old seals or when pressing new seals in tube, be careful not to distort or dent tube wall.

32. BRAKE ASSEMBLY

a. Description. This assembly (Fig. 43) consists of two parts: a stainless steel disc (2) which is secured to the lower half of the transmission housing (1) with four stainless steel screws; and the brake seal support (4) which fits over the splined support shaft assembly (1) (Fig. 48). A friction disc (3) is riveted to the upper face of this support, and items (3) and (4) are replaced as a unit.

b. Removal of Disc. Remove four Phillips head screws (5) and remove disc.

c. Replacement. Replace in reverse order of _b above.

d. Removal of Brake and Seal Support. Refer to Paragraph 15a, steps (1) and (2) and (4) thru (8).

e. Replacement. Replace in reverse order of d above.

Figure 44

33. AGITATOR SHAFT

a. Description (Fig. 41). This assembly comprises a 5/8" diameter steel shaft with a pinion gear press fitted and pinned to its lower end. The upper end is serrated to receive the agitator clutch gear. It runs in two bronze bearings which require no lubrication.

b. Removal.

(1) Remove cap screw (1) (Fig. 44), loosen cap screw (2) and swing pinion support (3) to clear pinion.

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(2) Pull clutch gear from agitator shaft (Fig. 45) and remove shaft from tube, c. Replacement. Replace in reverse order of b above.

b. Removal.

(1) Using a 3/8" diameter drift about 13" long, drive out the bottom bearing (Fig. 47).

(2) Drive out the upper bearing from the opposite end of the center post.

c. Replacement.

(1) Replace bottom bearing by pressing in with an arbor press until it seats on shoulder inside tube.

(2) Replace top bearing by pressing in until it seats on shoulder inside tube. NOTE: When replacing either bearing, mount in arbor press so that the end of the center post tube is supported. Tube is a tight press fit in the transmission casting, but might be driven out of position if not supported.

If shaft does not slide into bearings freely ream bearings with a standard 5/8" reamer.

Figure 45

34. AGITATOR SHAFT SEAL

a. Description. This seal prevents water from entering the transmission at the top of the center post. It is a spring-loaded, double lip seal.

b. Removal. With shaft removed from center, pry seal out with a screwdriver (Fig. 46).

c. Replacement. Push seal into center post as far as possible by hand and then gently tap until it seats flush with top of the center post. Use caution not to damage face of seal.

35. AGITATOR SHAFT BEARINGS

a. Description. These bearings are located at top and bottom of the center post. They provide bearing surface for the agitator shaft. Figure 46

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Figure 47

36. AGITATOR WEARING RING

a. Description. This part (Fig. 41) performs the dual function of holding the tub seal and center post seal in place, and providing a lower bearing for the agitator.

b. Removal.

(1) Using a No. 3 or 4 Truarc external pliers, remove the Truarc snap ring by lifting up and off the center post.

(2) Remove wearing ring and two rubber seals.

c. Replacement. Replace in reverse order of b above, using new rubber seals.

37. SUPPORT SHAFT ASSEMBLY

a. Description (Figs. 48 and 49). This assembly is comprised of a vertical aluminum tube which houses the drive shaft, its bearings and seals, and is the structural support for the whole transmission. Its lower end is pressed into a flexible rubber mount which bolts to the cabinet base. Its upper end supports the brake and upper seal support subassembly.

Figure 49

b. Removal.

(1) Remove collector tank assembly (Par. 15a).

(2) Remove two "O" rings, one steel washer, and one Truarc snap ring(l)

(Fig. 49).

(3) Remove three 1/4" nuts (2).

(4) Unhook three cone springs (3), using a drift as shown in Fig. 49.

(5) Grasp snubber plate (4), rotate back and forth, and pull upward to remove. CAUTION: You will note that one ear of the snubber plate is marked with the let-ter "F". When reassembling snubber plate, be sure the letter "F" is position -ed toward the front of the machine.

Figure 48

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(6) Remove six metal screws (5) securing support cone to cabinet base and lift off cone.

(7) Remove five Phillips head screws which secure support shaft assembly to base, and lift out.

c. Replacement. Replace in reverse order of _b above.

d. Tube Bearing and Seal Removal (Fig. 48). Upper end of tube is equipped with a special bronze bearing which does not require lubrication. Lower end is equipped with a sealed ball bearing and below it, a spring-loaded neoprene seal, each retained by a Truarc snap ring.

(1) Remove Truarc snap ring with No. 3 Truarc internal pliers.

(2) Remove seal.

(3) Remove Truarc snap ring with No. 3 Truarc internal pliers.

(4) Remove ball bearing by tapping lightly from opposite end with suitable rod.

NOTE: Top bearing cannot be replaced.

If defective, replace support tube assembly.

e. Tube Bearing and Seal Replacement.

(1) Slide ball bearing into tube until it seats on shoulder.

(2) Install Truarc snap ring.

(3) Install seal with open side toward ball bearing.

(4) Install Truarc snap ring.

38. MAIN SEAL

a. Description. This important seal is located in the top of the brake and seal support assembly. It prevents water from entering the support tube. A metal encased, double lip neoprene member seals against a carbon wearing ring on the rotating spin tube (Fig. 50). If either is defective, both should be replaced.

b. Removal of Neoprene Seal. Using a suitable drift, drive out of die cast housing.

c. Removal of Carbon Wearing Ring.

(1) Using a No. 2 external Truarc plier, remove Truarc snap ring (1) (Fig. 50).

(2) Remove retaining washer (2).

(3) Remove "O" ring (3).

Figure 50

(4) Remove carbon wearing ring (4).

(5) Remove rubber gasket (5).

d. Replacement of Carbon Wearing Ring. Replace in reverse order of c above, using new components (1) through (5). A piece of 1" pipe 15" long can be slid over the spin shaft and the assembly placed in an arbor press. Pressure applied to the pipe end will force the snap ring into the groove. CAUTION: Carbon ring is fragile and care should be taken not to chip or damage it.

e. Replacement of Neoprene Seal. Press into die cast housing (with open rubber face down) until it seats on shoulder.

39. PUMP ASSEMBLY

a. Description. The pump housing is heavy phenolic; the rubber impeller is molded to a brass shaft insert; and the stainless steel shaft is pressed into the insert. Shaft seal is designed to be permanently lubricated and leakproof. The seal requires no service.

b. To Clean Pump.

(1) Drain pump by lowering stand hose to floor.

(2) Remove 8 Phillips head screws which secure upper and lower halves of pump housing.

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(3) Loosen upper hose clamp at collector tank.

(4) Lift upper half of pump housing for access to inside.

c. Removal.

(1) Proceed with step b(1) above.

(2) Loosen all clamps and detach hoses.

(3) Tilt machine backwards and remove two 1/4" hex-head cap screws from under cabinet base.

(4) Remove pump.

d. Disassembly. If the seal, shaft or bearing is worn, the lower half of the pump housing (this will include bearing and seal) and the impeller assembly must be replaced as a unit. Remove upper half of pump housing b(2) above.

e. Replacement. Reassemble pump, using new gasket, and replace in reverse order of c(2) and (3) above.

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SECTION VI. TROUBLE SHOOTING

40. GENERAL

Blackstone washers are designed to operate with minimum service. Nevertheless, careless operation, misuse and failure to follow recommended laundering procedures will ultimately cause malfunction and unsatisfactory operation. This section lists the various failures most apt to occur and will assist the serviceman in diagnosing and correcting the trouble.

Since rather elaborate test equipment is required to test a timer, the serviceman should check out all other "probable causes" first. If the timer is isolated as the cause of malfunction, then replace it.

When the transmission is suspected as a trouble cause, remember its basic function is to provide agitation, spinning and braking. Malfunctions can usually be detected by visual or audible inspection. When trouble is suspected, run the machine through a complete cycle, observing whether or not agitation, spin and braking occur at the proper time. Also listen for unusual noises which might indicate damaged or broken gears, damaged main drive pulley or defective bearings. If machine fails to reach full spin speed in 50 seconds, check for the following malfunctions:

(1) worn clutch facings ( Fig. 42), (2) defective lift screw ( Fig. 42), ( 3) loose main drive belt (Fig. 36), (4) defective support shaft bearing (Fig. 48), (5) missing Truarc snap ring under ball bearing ( Fig. 48), and ( 6) defective motor or timer.

If machine fails to brake to a full stop at the end of the spin cycle in 30 to 35 seconds, look for defective friction disc ( 3) (Fig. 43) or defective lift screw.

If machine fails to agitate, check for the following malfunctions: (1) defective gear train,

(2) seized agitator shaft bearings, (3) stripped serrations on agitator shaft, (4) agitator slipping on clutch gear, and (5) defective motor or timer.

Following are other probable causes and possible remedies for various malfunctions.

41. WATER DOES NOT ENTER TUB

Probable Cause No power to machine.

Water not turned on.

Defective water valve.

Open circuits.

Defective timer.

42. TUB DOES NOT FILL

Probable Cause Low water pressure.

Possible Remedy Check plug and circuit to receptacle.

Check water supply.

Check water valve (Par. 23). If defective, repair as needed or replace.

Check for defective wiring and/or loose connections at terminals. Repair as needed. Replace timer (See Pars. 17, 18 and 40).

Possible Remedy

Since all Blackstone washers employ a "timed" fill, the amount of water entering the tub during the fill cycle depends on the local water pressure. Start the washer and observe the water level at completion of fill. It should be approximately level with the top of the agitator fins. If too low, accurately measure water depth from bottom of tub and advise the factory. The factory service department will compute the deficiency and supply

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Plugged water valve strainers.

a calibrated flow washer to correct the local pressure problem.

On Model BA 750, which recirculates, water must overflow into the collector tank during the initial fill. To detect a water deficiency in this model check the amount of water being recirculated.

If it is a full stream, sufficient water is entering the tub. If only a partial stream is observed, machine is starved for water and a flow washer to increase the water input is in order. The flow washer is installed in the outlet side of the water valve described in Par. 23. Simply replace the standard washer with a new one supplied by the factory.

Clean screens ( Par. 23 a).

43. WATER TEMPERATURE DOES NOT CORRESPOND WITH CONTROL SETTINGS

Probable Cause Wired wrong.

Intake hose connections reversed.

Defective temperature switch.

(Models BA 500 and BA 600/650). Defective program switch (Model BA 750).

Possible Remedy Check wiring (Figs. 25, 26 and 27).

Check hot and cold water hose connections at rear of washer. Make sure they are connected as marked and not reversed.

Check temperature switch (Pars. 19 and 20).

If defective replace.

Check program switch ( Par. 22). If defective, replace.

44. WATER DOES NOT SHUT OFF Probable Cause Defective water valve.

Defective Timer.

Possible Remedy Check water valve (Par. 23). If defective, repair as needed or replace.

Replace timer ( See Pars. 17, 18 and 40).

45. MOTOR DOES NOT RUN

Probable Cause Defective motor.

Defective speed switch (Models BA500 and BA 600/650).

Defective program switch (Model BA 750).

Open circuit.

Defective Timer.

46. AGITATOR DOES NOT OPERATE

Probable Cause Defective or loose belt.

Possible Remedy Check motor ( Pars. 24 and 25). If defective, replace.

Check speed switch ( Par. 21). If defective, replace.

Check program switch ( Par. 22). If defective, replace.

Check for defective wiring and/or loose connections at terminals. Repair as needed. Replace timer ( See Pars. 17, 18 and 40).

Possible Remedy Check belt (Par. 28). If defective, replace.

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Loose or broken pulley.

Defective timer.

Defective motor.

Defective transmission.

Agitator not engaged.

47. TUB DOES NOT SPIN

Probable Cause

Defective or loose belt.

Loose or broken pulley.

Defective timer.

Defective motor.

Defective transmission.

Defective #50665 thrust bearing.

48. MACHINE DOES NOT DRAIN

Probable Cause Broken pump belt.

Clogged or defective pump.

Clogged or kinked discharge hose.

49. SPRAY RINSE DOES NOT OPERATE

Probable Cause Defective water valve.

Open circuit.

Defective timer.

50. TIMER DOES NOT ADVANCE

Probable Cause Defective timer.

Open circuit.

51. WATER DOES NOT RECIRCULATE (MODEL BA750 only)

Probable Cause Broken pump belt.

Clogged or defective pump.

Check pulley (Par. 28). If defective, tighten or replace.

Replace timer ( See Pars. 17, 18 and 40).

Check motor ( Pars. 24 and 25). If defective, replace.

Check transmission (Pars. 29 thru 38, and 40).

If defective, repair or replace.

Check to see that agitator is engaged with clutch gear and that cap is tightened.

Possible Remedy Check belt (Par. 28). If defective, replace.

Check pulley ( Par. 28). If defective, tighten or replace.

Replace timer (See Pars. 17, 18 and 40).

Check motor (Pars. 24 and 25). If defective, replace.

Check transmission (Pars. 29 thru 38, and 40).

If defective, repair or replace.

Replace.

Possible Remedy Check pump belt. (Par. 28). If broken, replace. Check pump (Par. 39). If clogged, clean.

If defective, replace.

Check discharge hose. Clean or repair as needed.

Possible Remedy Check water valve ( Par. 23). If defective, replace.

Check for defective wiring and/or loose connections at terminals. Repair as needed.

Replace timer (See Pars. 17, 18 and 40).

Possible Remedy

Replace timer ( See Pars. 17, 18 and 40).

Check for defective wiring and/or loose connections at terminals. Repair as needed.

Possible Remedy

Check pump belt (Par. 28). If broken, replace. Check pump ( Par. 39). ' If clogged, clean.

If defective, replace.

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Clogged or defective return system. Defective program switch.

52. MACHINE LEAKS OIL

Probable Cause

Defective pinion seal.

53. MACHINE LEAKS WATER

Probable Cause Loose hose connections.

Leaky pump gasket.

Improperly installed collector tank gasket. Leaky collector tank diaphragm.

Defective pump seal.

54. WASHABLES ARE DAMAGED

Probable Cause Excessive or improper bleaching.

Cracked or chipped agitator.

Low water level in tub.

Improper cycle selection.

55. EXCESSIVE VIBRATION

Probable Cause Machine not level.

Weak or springy floor.

Excessively unbalanced load.

Defective support shaft assembly.

Broken or disengaged snubber.

56. MOTOR DOES NOT SHUT OFF

Probable Cause Defective timer.

Repair as needed.

Check program switch ( Par. 22). If defective, replace.

Possible Remedy

Check pinion seal (Par. 31). If defective, replace.

Possible Remedy

Check all hose connections with tub and collector tank filled. If leaking, repair as needed.

Check pump gasket (Par. 39). If leaking, replace. Check collector tank gasket (Par. 15).

If defective, replace.

Check collector tank diaphragm (Par. 15).

If Defective replace.

Check pump (Par. 39). Repair as needed.

Possible Remedy This is not a machine malfunction. Excessive bleaching will cause premature disintegration of many fabrics. Caution user to follow her Use & Care Manual.

Check agitator for cracks or chips which could cause abnormal wear on fabrics. Replace agitator if damaged.

Agitation with insufficient water in the tub will cause undue wear of fabrics. Check as per Par. 42. Refer to Use & Care Manual.

This is not a machine malfunction. Refer user to Use & Care Manual.

Possible Remedy Check machine installation (Par. 8).

Check machine installation (Par. 8).

This is not a machine malfunction. Refer user to Use & Care Manual.

Check support shaft assembly (Par. 37). Repair as needed.

Check springs ( Par. 37). Repair as needed.

Possible Remedy Replace timer (See Pars. 17, 18 and 40).

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