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STEERING
tions of the tool. Turn the tool nut counterclockwise
to withdraw the seal from the housing.
(2) Place the seal onto the splines on the cross shaft
with the lip of the seal facing the gear housing.
(3) Place the installing adapter from Tool C-3880
against the seal. For AR1, AR2, AV1 and AV2 models
use adapter SP-3828 with the
short step end
toward
the seal (Fig. 20). For AP1 and AP2 models use adapt-
e r SP-3052 (Fig. 21).
(4) For AR1, AR2, AV1 and AV2 models place the
nut down from Tool set C-3880 on the cross shaft,
and turn it down against the adapter, pressing the
seal into the housing until the step on the adapter con-
tacts the end of the housing. For AP1 and AP2
mod-
els press in the seal until a gap
of
% inch exists be-
tween the adapter and the housing (Fig. 21).
POWER STEERING GEAR
Description
The power steering gear (Figs. 1 and 2) consists of
a gear housing containing a gear shaft with sector
gear, a power piston with gear teeth broached into the
side of the piston which is in constant mesh with the
gear shaft sector, and a wormshaft connecting the
steering wheel to the power piston through a U-joint
type coupling. The wormshaft is geared to the piston
through recirculating ball contact. The steering valve,
mounted on top of the steering gear, directs the flow
of fluid in the system.
SERVICE DIAGNOSIS
POWER STEERING GEAR
Condition
Possible Cause
Correction
HARD STEERING
(a) Tires not properly inflated.
(b) Low oil level in pump reservoir (usually
(c) Loose pump belt.
(d)
Improper caster and camber.
(e) Power steering output low.
(a) Inflate tires to recommended pressures.
(b)
See "Fluid Level," Power Steering Pump.
(c) See "Group 7-Cooling."
(d)
See "Front Wheel Alignment." Front Suspen-
sion Section.
(e) Perform the "Pump Pressure and Flow Tests."
NOTE:
When the power steering pump fails to
give proper steering assist, the trouble is usual-
ly caused by fouling of the flow control valve
causing
it
to stick in the open or "by-pass"
position. This fouling can be caused
by
gum
deposits, pieces of broken slipper springs, burrs,
or foreign material (pieces of rubber,
dirt
or
machine chips). If no fouling
o f the
flow control
valve
i s
evident, or if the flow control valve
contains pieces of coiled wire (broken slipper
spring), the pump should be disassembled for
possible slipper spring replacement.
(f) Repair and lubricate as necessary.
(9) Adjust or repair as follows:
1.
See "Gear Shaft Adjustment."
2.
Remove steering gear, repair as necessary.
3.
Inspect for leakage at the lower sector
shaft
oil seal; the sector
shaft
cover
"0"
ring.
4.
Remove steering gear and repair as neces-
sary.
accompanied by pump noise).
(f)
Steering linkage binding.
(9) Steering gear malfunctions.
1. Gear shaft adjustment too tight.
2.
Faulty or damaged valve lever.
3.
External leakage.
4. Excessive internal leakage.
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