GMC 1989 Light Duty Truck, Repair Manual, Page: 123 / 998

POWER STEERING 3B3-9
3. Check the com bined ball and bearing preload
by turning the torque wrench through the center
of travel. Note the highest reading.
4. T igh ten the a d ju stin g screw (222) until the
torque wrench reads 0.6-1.2 N m (6-10 in. lbs.)
higher than the reading noted in step “ 3 .”
• The total reading should not exceed 2.5
N-m (20 in. lbs.) torque.
NO TIC E: R e fe r to “ N o tic e ” on p a g e 3B 3-1 o f this
m anual.
Tighten
• Nut (227) to 27 N-m (20 ft.lbs.).
5. Re-check the preload after tightening the nut
(227).
8 . Plug (215), seal (216), ring (217), and seal (218).
9. Plug (219) and retaining ring (220) (figure 22).
SAGINAW INTEGRAL POWER STEERING GEAR—
CK (GMT 400)
N O TIC E: R e p a ir the ste e rin g g e a r in a clean , d ust-
free lo c a tio n , using cle a n tools a n d e q u ip m e n t.
D irt o r g rit w ill d a m a g e th e m a c h in e d surfaces
an d resu lt in le a k a g e o r d a m a g e to th e s teerin g
g e a r assem bly.
If broken components or foreign materials are found dur­
ing disassembly of the gear the hydraulic system should be
disassembled, inspected, cleaned and flushed before serv­
icing is complete.
Service information is shown in figures 23, 2 4 ,2 5 ,2 6 and
27.
The ball nut and control rings (seals) generally need not
be replaced unless cut or dam aged. If cut or damaged,
inspect all mating parts for burrs, cracks, scratches, or
damage. Replace or repair as needed.
In some instances, “ power steering flu id ” will be speci­
fied to lubricate parts upon assembly. In these cases, GM
Power Steering Fluid, part no. 1050017 or equivalent
should be used. DO NOT use brake fluid, autom atic trans­
mission fluid, or other non-approved fluids.
SAGINAW POWER STEERING PUM P— MODEL TO
NOTICE: R e p a ir the p u m p o n ly in a clean, d ust-
free location, using clean to o ls a n d e q u ip m e n t.
D irt o r g rit w ill d a m a g e the m a c h in e d surfaces
a n d resu lt in leakag e o r d a m a g e to th e p u m p .
If broken components or foreign m aterials are found dur­
ing disassembly of the pump, the hydraulic system should
be disassembled, inspected, cleaned and flushed before
servicing is complete.
Before beginning disassem bly of the pump, remove the
reservoir filler cap (when used) and drain the oil from the
reservoir by filler cap (when used). Drain the oil from the
resvoir by inverting the pump so oil may drain out the filler
hole. After the oil is drained from the reservoir, replace the
cap.
DISASSEMBLY
Clean
• Exterior of the pump with solvent.
Remove or Disconnect (Figures 28 through 39)
— Clamp the front hub of the pump in a soft jawed vise.
1
. Clips (26), if equipped.
• Pry the tab and slide the retaining clip off (figure
29).
2. Reservoir (24) (figure 30) or return tube (15) (figure 39)
depending on model.
3. O-ring (25).