Chevrolet 70 1969 Series, Shop Manual

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STEERING 9-30
Figure 1— Power Cylinder (Typical)
2. Loosen clam p bolt on the outside of the socket.
3. Using a wide blade screwdriver to keep the piston
from turning, unthread socket end from piston rod.
4. Force piston rod in and out of power cylinder to
drain rem aining fluid.
5. Using T ru-arc snap ring pliers, remove the scraper re­
tainer snap ring from groove in piston rod guide as­
sembly.
6. Apply air pressure to the retraction port in the guide
assembly while at the sam e time holding a finger over
the extension port. This will dislodge wiper ring as­
sembly. scraper retainer, scraper retainer O-ring seal,
and piston rod seal from the guide assembly.
CLEANING AND INSPECTION
Clean and inspect the com ponents using cleaning sol­
vent and com pressed air. Replace all parts that are not in
first class condition.
ASSEMBLY (Refer to Fig. 1)
1. Lubricate lip of the piston rod seal with a thin layer
of Lubriplate or equivalent, and insert it into the
guide assem bly with the “ U ” of the cup tow ard the
bottom of opening in guide.
2. Install scraper retainer O-ring seal.
3. Install the scraper retainer in guide with “ U " side
pointing out.
4. Insert the wiper ring assem bly; then using T ru-arc
snap ring pliers, install the retaining snap ring. M ake
sure retaining ring is well seated in groove of the
guide assembly.
5. T hread the socket end assem bly on piston rod until it
shoulders against the rod.
6. Tighten the clam p bolt securely:
7. A t both ends of the power cylinder, install ball seats;
then thread the adjuster screws into the sockets loose­
ly.
SPECIFICATIONS
STEERING G EAR A P P L IC A T IO N CHART
Truck Series Gear Model
Series 70 Tilt Cab M o d e l s .................................................................................. ..... 553-DV-54
Series 80 Tilt Cab M o d e l s .................................................................................. ..... 553-DV-55
Series 70-80 Conventional Cab Models; Except F-160 Front Axle ............... ..... 553-DV-67
Series 80 Conventional Cab Models With F-160 Front A x l e ........................... ..... 553-DV-70
P O W E R STEERING G EAR SPECIFICATIONS
M a k e ...................................................................... Saginaw Steering Gear Division
T y p e ...................................................................... Recirculating Ball and Sector Nut
Model .............................................................................................. See Chart Above
Gear Ratio
28.14 to 1
28.14 to 1
28.14 to 1
28.14 to 1
CHEVROLET SERIES 70-80 H EAVY DUTY TRU CK S H O P M A N U A L