Chevrolet 70 1969 Series, Shop Manual

Page: 480 / 913

STEERING SYSTEM 9B-29
1 Outer Tube
2 Inner Tube
3 Pressure Relief Valve
4 Oil Seal
5 Oil Seal
6 Extension Port
Retaining Ring
Retraction Port
Wiper Assembly
10 Guide Assembly
11 Piston Rod
12 Piston
10 9
TPM-7398
Figure 11 — Power Cylinder (Typical)
3. Remove cotter pin and loosen adjuster
screw securing end of the power cylinder to sup­
port bracket mounting ball enough that the cylinder
can be removed from the mounting ball.
4. Repeat procedures in Step 3 above and re­
move the opposite end of power cylinder from tie
rod or Pitman arm ball stud.
IN S T A L L A T IO N
1. Position power cylinder on tie rod or Pit­
man arm ball stud and to support bracket mounting
ball.
2. Turn adjuster screw at each end of the
power cylinder in tight; then back off to nearest
cotter pin holes and install new cotter pins.
3. Turn front wheels from extreme right to
left and check to see that the power cylinder does
not bottom preventing stops from hitting the axle.
4. Reconnect hydraulic hoses to power cylin­
der ports. Tighten fittings to 20-30 foot-pounds
torque. N O T E : Make certain hoses are not kinked
and do not bind when wheels are turned.
5. Bleed the hydraulic system and bring fluid
to proper level as previously directed under "Bleed­
ing The Hydraulic System."
POWER CYLINDER SEAL
REPLACEMENT
R E M O V A L (Refer to Fig. 11)
N O T E : The two power cylinders covered in
the following procedures are of the same basic
design. The only difference is in the stroke length,
which for all models is dependent upon the axle
capacity. The only parts that can be replaced in
the power cylinder are the piston rod seals, socket
end ball stud seats, and adjuster screws.
Figure 12— Axle Mounted Power Cylinder Adjustment (Typical)
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L