GMC 1990 Light Truck Repair Manual page 350

5-14 BRAKES
A. Diaphragm Lip
20. Secondary Diaphragm
21. Secondary Support Plate
41. Power Piston Assem bly
Figure 28—Assembling the Secondary Diaphragm
and Support
Hydro-Boost Housing to Cover Bolts..........................................................................................
Hydro-Boost N u t..........................................................................................................................
J 28458
41
18.
19.
20
.
41.
F-05894
Figure 29—Assembling the Housing Divider
SPECIFICATIONS
Secondary Piston Bearing
Housing Divider
Secondary Diaphragm
Power Piston Assem bly
J 28458
F-05895
N-m Ft. Lbs.
30 22
149 110