K 1500 Truck 4WD V8-350 5.7L (1986)
FIGURE 1 - CALIPER/KNUCKLE CLEARANCES
IMPORTANT!
EACH APPLICABLE STEP MUST BE THOROUGHLY COMPLETED TO EFFECT A LASTING REPAIR. FAILURE TO COMPLETE THE
PROCEDURE EXACTLY AS WRITTEN MAY RESULT IN AN UNSATISFACTORY REPAIR.
Conduct a series of 5 stops from 55 MPH bringing vehicle to a stop in 5 seconds (15 FPS Sq.). Record amount and direction of lead. Do not slide or lock
wheels.
*
FPS Sq or Ft/Sec2 is the measurement used for calculating the deceleration rate with a decelerometer. Use of decelerometer, when available, is the
preferred method.
PROCEDURE A
Right or left lead
Remove and discard the brake calipers and pads
Refinish brake rotors per Chart 1 (or replace brake rotors if they cannot be brought into spec.)
Inspect and/or adjust front wheel bearing per the procedure in Service Manual Section 3C
Install new Delco Moraine brake calipers See Parts Information for part numbers
Install new Delco Moraine brake pads See Parts Information
Bleed front brakes
Inspect caliper to knuckle clearance. It should be between .010" - .024" in total. If necessary, file the knuckle to obtain clearances. Equalize all upper and
lower clearances per Figure No. 1.
Perform 12 stop burnish procedure. Burnish procedure is mandatory.
12 Stop burnish procedure
1st Stop
From 40 MPH taking 6 seconds to stop (10 FPS SQ)*
2nd Stop to
11th Stop
From 55 MPH taking 5 seconds to stop (15 FPS SQ)*
12th Stop
From 40 MPH taking 6 seconds to stop (10 FPS SQ)*
Drive 1/2 (0.5) miles between burnish stops.
Drive 4 miles after 12th stop to cool system.
