1995 ISUZU TROOPER Workshop Manual

[1!) INSPECTION AND REPAIR
Make all necessary adjustments, repairs, and part
replacements
if wear, damage, or other problems are
discovered during inspection.
Rotor (Fig. 381-28)
Check that the groove in the vane is free from
excessive wear and that the vane slides smoothly.
When part replacement becomes necessary, the
pump cartridge
should be replaced as a subassembly.
Fig. 381-28
Vane (Fig. 381-29)
Sliding faces of the vane should be free from wear.
(Particularly the curved face at the tip in contact with
the cam should be free from wear and distortion).
When part
replacement becomes necessary, the
pump cartridge should be replaced as a subassembly.
Fig. 381-29
POWER STEERING GEAR AND PUMP 381-15
Cam
The inner face of the arm should have a trace of
uniform contact without a sign of step wear.
When part
replacement becomes necessary, the
pump cartridge should be replaced as a subassembly.
Side plate
The sliding faces of parts must be free from step wear
(more than 0.01 mm), which can be felt by the finger
nail.
The parts with minor scores may be reused after
lapping the face.
Valve
The sliding face of the valve must be free from burrs
and damage.
The parts
with minor scores may be reused after
smoothing
with emery cloth (#800 or finer).
Shaft
Oil seal sliding faces must be free from a step wear
which can be felt by the finger nail.
Needle
bearing fitting face must be free from
disintegration and wear.
0-ring, oil seal, retaining ring
Be sure to discard used parts, and always use new
parts for installation. Prior to installation, lubricate all
seals
and rings with power steering fluid.

381-16 POWER STEERING GEAR AND PUMP
l•!•l REASSEMBL V
20. Rear housing
19. Pin
18. Cam
17. Rotor and vane
r=1 • Install the rotor with punch mark facing the
t=1 front housing (Fig. 3B1-30).
r=1 • Install the vanes with curved face in contact
t=1 with the inner wall of the cam (Fig. 3B1-31 ).
16. Side plate
\fl CAUTION:
Fig. 3B1-30
~
Fig. 3B1-31
"---
Q
'if When installing side plate, be careful not to
damage its inner surface. Damaged side plate
may cause poor pump performance, pump
seizure or oil leakage.
15. Front housing
14.
0-ring
• Be sure to discard used parts, and always use
new parts for installation.
13. 0-ring
• Be sure to discard used parts, and always use
new parts
for installation.
12.
11.
10.
9.
Gasket
• Be sure to discard used parts, and always use
new parts for installation.
Spring
Rear housing and pump cartridge
Bolt
l~I_T_o_rq_u_e_N_·_m_(_lb_·f_tl____. ___ 3_7_(2_7_) __ _
8.
7.
6.
5.
4.
~
3.
2.
1.
~
Oil seal
CAUTION:
When installing the oil seal, be careful not to
damage the oil seal contacting surface of the
housing.
• Be sure to discard used parts, and always use
new parts for installation.
Shaft assembly
Retaining ring
0-ring
• Be sure to discard used parts, and always use
new parts for installation.
Connector
Torque N·m (lb·ft) 74 (54)
0-ring
• Be sure to discard used parts, and always use
new parts for installation.
Pipe, suction
Bolt
Torque N·m (lb·ft) 16 (12)
..

POWER STEERING GEAR AND PUMP 381-17
MAIN DATA AND SPECIFICATIONS
GENERAL SPECIFICATIONS
Steering unit
Type
Gear ratio
Oil pump
Type
Operating
fluid
TORQUE SPECIFICATIONS
Fig. 381-32
Integral, ball screw
15.8: 1
Vane
ATF
DEXRON®-m
N·m (lb.ft)

381-18 POWER STEERING GEAR AND PUMP
TORQUE SPECIFICATIONS (Cont'd) N·m (lb·ft)
25 (18)
Fig. 381-33
SPECIAL TOOLS
ILLUSTRATION TOOL
NO.
TOOL NAME ILLUSTRATION TOOL
NO.
TOOL NAME
~
J-29877-A
Tester: Power steering
~
J-26508
Installer;
Extension housing oil seal
~ J-39213
~ ID ®
Adapter:
Power steering tester
~
J-29107
Remover:
Pitman arm

STEERING LINKAGE 383-1
SECTION 383
STEERING LINKAGE
w CAUTION:
• When fasteners are removed, always reinstall them at the same location from which they were removed. If a
fastener needs
to be replaced, use the correct part number fastener for that application. If the correct part
number fastener is not available, a fastener of equal size and strength (or stronger) may be used. Fasteners
that are not reused, and those requiring thread locking compound, will be called out. The correct torque
value must be used when installing fasteners that require it. If the above conditions are not followed, parts or
system damage could result.
CONTENTS
General Description . . . . . . . . . . . . . . . . . . . . 383-1
On-Vehicle Service .................... 383-2
Center Track Rod Assembly . . . . . . . . . . . 383-2
Outer Track Rod Assembly . . . . . . . . . . . . 383-4
Relay Lever . . . . . . . . . . . . . . . . . . . . . . . . . 383-6 Main
Data
and Specifications ............ 383-8
Torque Specifications
................ 383-8
Special Tools .......................... 383-8
GENERAL DESCRIPTION
The steering linkage consists of a pitman arm, relay
lever,
center track rod and two adjustable outer track
rods.
When the steering
wheel is turned, the gear rotates the
pitman arm
which forces the center track rod to one
side. The outer track rods, connected to the center
track rod
by ball studs, transfer the steering force to the
wheels. The outer track rods are adjustable and are
used
for toe-in adjustments. The center track rod is
supported
by the pitman arm and relay lever. The relay lever
pivots
on a support attached to the frame.
The
overall condition of the steering linkage affects
steering performance.
If parts are bent, damaged,
worn or poorly lubricated, improper and possibly
dangerous steering action will result.
Whenever any steering linkage components are
replied or replaced, check the steering geometry and
front end alignment. Refer to Front End Alignment
(Sec. 3A).
Center track rod assembly
Rod end, inner
Track rod
Rod end, outer
Relay lever---~·--:;:::jo
I
I Outer track rod assembly
Fig. 383-1