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DELCO-MORAINE DUAL
DIAPHRAGM POWER BRAKE
BOOSTER REPAIR
A new power booster repair procedure is
required due to following internal component
changes within the booster:
1. Secondary diaphragm and support ring
has been replaced by a diaphragm with an
integral ring.
2. The retainer plate has been deleted.
3. A new divider housing.
DISASSEMBLY
1. Scribe a mark on the top center of the
front and rear housings in line with master
cylinder reservoir cover to facilitate re-
assembly.
COMPONENT REPAIR
Figure 8-Delco-Moraine Power Booster Components
BRAKES 5-5
2 . Remove the two nuts which hold the
master cylinder to the front housing, and
remove the master cylinder from the mounting
studs.
3 . Remove front housing seal (figure 8) .
4. Install booster assembly in brake booster
separating fixture (J-23456) as shown in figure
9 .
CAUTION : When
separating
housings
maintain light pressure on rear
housing
as it is under spring tension.
5. With booster clamped slightly, rotate bar
counterclockwise to unlock housings.
If the
front housing cannot be readily loosened, tap
the rear housing lightly with a plastic hammer .
REAR HOUSING SEAL
SILENCER
PUSH ROD BOOT
BOOT RETAINER
REAR HOUSING
POWER PISTON
RETURN SPRING
FRONT HOUSING
A-6076
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