Chevrolet Blazer/Jimmy 1969-1982 Repair Guide

Adjustments

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LINKAGE



This adjustment is for the amount of clutch pedal free travel before the throwout bearing contacts the clutch release fingers. It is required periodically to compensate for clutch lining wear. Incorrect adjustment will cause gear grinding and clutch slippage or wear.

If you have a problem with grinding when shifting into gear, shorten the pedal stop bumper to 3 / 8 in. and readjust the linkage.

1969-72 Models


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Fig. Fig. 1 Exploded view of the clutch linkage components and its location-1969-72 models



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Fig. Fig. 2 Clutch linkage adjustment-1969-72 models

  1. Disconnect the clutch fork return spring at the fork on the clutch housing.
  2.  
  3. Loosen the outer adjusting nut (A) and back it off approximately 1 / 2 inch from the swivel.
  4.  
  5. Hold the clutch fork pushrod against the fork to move the throwout bearing against the clutch fingers. The pushrod will slide through the swivel at the cross-shaft.
  6.  
  7. Rotate the lever until the clutch pedal contacts the bumper mounted on the parking brake support.
  8.  
  9. Adjust the inner adjusting nut (B) to obtain 3 / 16 - 1 / 4 inch clearance between nut (B) and the swivel.
  10.  
  11. Release the pushrod, connect the return spring and tighten the outer nut (A) to lock the swivel against the inner nut (B).
  12.  
  13. Check the free travel at the pedal and readjust as necessary. It should be 3 / 4 to 1 inch.
  14.  

1973-82 Models


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Fig. Fig. 3 Clutch linkage components-1973-82 models

Models from 1974 have a switch on the pedal linkage to prevent the starter from being operated unless the pedal is depressed.

  1. Disconnect the return spring at the clutch fork on the clutch housing.
  2.  
  3. Rotate the clutch lever and shaft assembly until the clutch pedal is firmly against the rubber bumper on the brake pedal bracket.
  4.  
  5. Push the outer end of the clutch fork rearward until the throwout bearing lightly contacts the pressure plate levers.
  6.  
  7. Detach the pushrod from the clutch lever. Loosen the locknut and adjust the rod length so that the swivel slips freely into the gauge hole (the upper hole on the lever). Increase the rod length until all lash is removed.
  8.  
  9. Remove the swivel from the gauge hole. Insert the swivel in the lower, original, hole in the lever. Install two washers and the cotter pin. Tighten the locknut, being careful not to change the rod length. Reinstall the spring and check pedal free travel. It should be 1 3 / 8 -1 5 / 8 inch.
  10.  

If you have a problem with driveline chatter in reverse on an early 1973 four wheel drive model, this can be corrected with a service kit (no. 340607) containing a new clutch cross shaft and relocated clutch fork springs. The kit components were installed in later models.

 
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