GMC 1976 ZEO 6083 Maintenance Manual page 542

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STEERING
STEERING GEAR AND PUMP DIAGNOSIS CHART (Cont'd .)
Condition Possible Cause Correction
6 . Steering linkage 6. Replace pivots .
binding.
7 . Ball joints binding. 7. Replace ball joints .
(Turn steering wheel and
listen for internal
rubbing in column-check
causes listed and correct
as directed).
8 . Steering wheel rubbing 8. Adjust steering jacket .
against directional
signal housing.
9 . Tight or frozen 9. Replace bearings.
steering shaft bearings .
10 . Rubber spacer binding.
10 . Make certain spacer is properly
seated . Lubricate inside diameter
with silicone .
11 . Sticky or plugged
11 . Remove and clean or replace
valve spool . valve.
12 . Steering gear adjust-
12 . Check adjustment with gear out
ments over specifications . of vehicle. Adjust as required .
Vehicle wanders.
1 . Front end mis- 1 . Adjust to specifications .
(Keep in mind road con- aligned.
dition and wind . Test
vehicle on flat road go-
ing in both directions) .
2 . Unbalanced steering 2. Replace valve.
gear valve.
NOTE : If this is cause,
steering effort will be
- very light in direction of
lead and heavy in op-
posite direction .
Momentary increase in 1 . Low oil level in pump . 1 . Add power steering fluid as
effort when turning required .
wheel fast to right or
left .
2 . Pump belt slipping . 2. Tighten or replace belt .
-
3 . High internal leakage . 3 . Check pump pressure . (See pump
pressure test).