SMU - SECTION 7C, INTERNAL CLUTCH ADJUSTMENT

SUBJECT: SERVICE MANUAL UPDATE - SECTION 7C - INTERNAL CLUTCH ADJUSTMENT

MODELS: 1990-1994 CHEVROLET AND GMC TOPKICK/KODIAK, P6 FORWARD CONTROL AND B7 CHASSIS MODELS

THE FOLLOWING REPRESENTS NEW AND/OR REVISED INFORMATION FOR SECTION 7C IN THE 1990-1994 TOPKICK/KODIAK, P6 FORWARD CONTROL, AND B7 CHASSIS MODELS SERVICE MANUAL.

THIS INFORMATION SHOULD BE ADDED TO SECTION 7C OF THE 1990-1991 TOPKICK/KODIAK, P6 FORWARD CONTROL, AND B7 CHASSIS MODELS SERVICE MANUAL AND REPLACES THE INFORMATION FOUND UNDER "INTERNAL CLUTCH ADJUSTMENT" IN SECTION 7C OF THE 1992-1994 TOPKICK/KODIAK, P6 FORWARD CONTROL, AND B7 CHASSIS MODELS SERVICE MANUAL.

INTERNAL CLUTCH ADJUSTMENT

PROCEDURES:

IMPORTANT

FOR A PULL TYPE CLUTCH, CHECK INTERNAL CLUTCH ADJUSTMENT BEFORE MAKING ANY EXTERNAL CABLE ADJUSTMENTS. EXTERNAL CABLE ADJUSTMENT SHOULD ONLY BE PERFORMED AFTER THE INTERNAL CLUTCH ADJUSTMENT HAS BEEN COMPLETED OR CHECKED ON A PULL TYPE CLUTCH.

DANA SPICER 14-INCH TWO-PLATE, PULL TYPE (6.6L DIESEL)

MEASURE (FIGURES 1 THROUGH 4) 1. MEASURE THE DISTANCE FROM THE REAR FACE OF THE RELEASE BEARING TO THE FRONT OF THE TRANSMISSION BEARING RETAINER OR CLUTCH BRAKE (IF EQUIPPED) (FIGURE 1).

A. IF 19.05 MM (0.750 IN.) ON TRANSMISSIONS WITHOUT CLUTCH BRAKE, NO ADJUSTMENT IS NECESSARY. B. IF 12.7 MM (0.50 IN.) ON TRANSMISSIONS WITH CLUTCH BRAKE, NO ADJUSTMENT IS NECESSARY. C. IF NO ADJUSTMENT IS REQUIRED, REFER TO STEP 9.

2. IF THE RELEASE BEARING POSITION IS INCORRECT, USE KWIK-ADJUST (IF EQUIPPED) OR REMOVE THE ADJUSTING RING LOCKSTRAP FOR ADJUSTMENT OF THE RELEASE BEARING (FIGURES 2 AND 3). ADJUST 3. DISENGAGE CLUTCH BY DEPRESSING THE CLUTCH PEDAL TO END OF THE PEDAL TRAVEL. 4. INSERT A 3/4 IN. 12 POINT SOCKET OR A BOXED END WRENCH THROUGH THE INSPECTION HOLE AND DEPRESS THE SQUARE HEADED BOLT TO ADJUST CLUTCH. THE KWIK-ADJUST WILL RE-ENGAGE AT A QUARTER OF A TURN. THE FLAT ON THE BOLT HEAD WILL ALIGN WITH THE FLAT EDGE OF THE BRACKET (KWIK-ADJUST ONLY). 5. TO INCREASE THE RELEASE BEARING DIMENSION; ROTATE THE ADJUSTING RING COUNTERCLOCKWISE. 6. TO DECREASE THE RELEASE BEARING DIMENSION; ROTATE THE ADJUSTING RING CLOCKWISE.

NOTICE: REFER TO "NOTICE" ON PAGE 7C-1.

7. AFTER CORRECT BEARING POSITION IS ACHIEVED; ASSURE KWIK-ADJUST IS ENGAGED IN THE LOCKED POSITION OR THE LOCKSTRAP AND BOLTS ARE IN POSITION.

TIGHTEN * LOCKSTRAP BOLTS TO 33 N.M (32 LBS. FT.).

8. RELEASE THE CLUTCH PEDAL TO ENGAGE THE CLUTCH. 9. ONLY AFTER INTERNAL ADJUSTMENT, ADJUST EXTERNAL CABLE, IF NEEDED, FOR 3.17 MM (0.125 IN.) CLEARANCE BETWEEN RELEASE YOKE FINGERS AND RELEASE BEARING.

EATON VALEO 14-INCH SINGLE-PLATE AND LIPE 330 MM TWO-PLATE, PULL TYPE

MEASURE (FIGURES 1, 4, AND 5)

1. MEASURE THE DISTANCE FROM THE REAR FACE OF THE RELEASE BEARING TO THE FRONT OF THE TRANSMISSION BEARING RETAINER OR CLUTCH BRAKE (IF EQUIPPED) (FIGURE 1).

A. IF 19.05 MM (0.750 IN.) ON TRANSMISSIONS WITHOUT CLUTCH BRAKE, NO ADJUSTMENT IS NECESSARY. B. IF 12.7 MM (0.50 IN.) ON TRANSMISSIONS WITH CLUTCH BRAKE, NO ADJUSTMENT IS NECESSARY.

ADJUST

2. IF THE RELEASE BEARING POSITION IS INCORRECT, LOOSEN THE LOCK RING AND TURN THE ADJUSTING NUT TO ACHIEVE THE CORRECT DIMENSION DESCRIBED IN STEP 1. 3. TIGHTEN THE LOCK RING SECURELY AGAINST THE RELEASE LEVER COUPLER. 4. ONLY AFTER INTERNAL ADJUSTMENT, ADJUST EXTERNAL CABLE, IF NEEDED, FOR 3.17 MM (0.125 IN.) CLEARANCE BETWEEN RELEASE YOKE FINGERS AND RELEASE BEARING.

FIGURES: 5

FIGURE 1 - RELEASE BEARING TRAVEL GAP (PULL TYPE CLUTCH) FIGURE 2 - INTERNAL CLUTCH ADJUSTMENT (DANA SPICER WITH KWIK- ADJUST) FIGURE 3 - INTERNAL CLUTCH ADJUSTMENT (DANA SPICER WITH LOCKSTRAP) FIGURE 4 - TWO PLATE PULL TYPE CLUTCH COMPONENTS (LIPE 330 MM OR DANA SPICER 14-INCH) FIGURE 5 - SINGLE PLATE PULL TYPE CLUTCH COMPONENTS (EATON VALEO 14-INCH)

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.

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