K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
Fig. 5 Brake Booster Lock Tab & Staking Positions
1.
Lubricate inside diameter of diaphragm lip with a thin layer of silicone grease, then install diaphragm into the diaphragm support, Fig. 3.
2.
Install diaphragm and diaphragm support onto power piston and pushrod assembly.
3.
Install new diaphragm retainer. Ensure retainer is fully seated.
4.
Install filter, reaction retainer, piston rod and reaction body retainer.
5.
Apply silicone grease to the power piston bearing and install it into the rear housing, then install return spring.
6.
Mount housings to holding fixture and turn fixture handle in a clockwise direction to lock the front and rear housings.
7.
Stake housing in locations shown, Fig. 5. Do not stake a tab that has been staked previously.
8.
Lubricate inside and outside edges of grommet and front housing seal, then install grommet and seal.
9.
Install vacuum check valve, silencer and boot.
10.
Ensure piston rod depth is within specifications using gauge tool No. J-37839 or equivalent.
Tandem Diaphragm Type
Disassembly
Fig. 4 Brake Booster Holding Fixture
