Dodge D250 1990 Service Manual page 78

Service Brakes
DODGE Turbo Diesei
Power Steering and Vacuum Pump
Page5-5
15mm
Remove the four nuts and separate the power steering pump
from the vacuum pump housing.
Remove the push rods from the vacuum pump housing.
Inspect the push rods. They should slide smoothly in the
bushings but should not move side to side.
10mm
Remove the diaphragm assemblies from the housing. If the f-jc*]
diaphragms are bad, they must be replaced as a unit.
Remove and discard the o-rings from the center bore and push
rod bores.