Steering Gearbox - Subaru IMPREZA 2002 Service Manual

STEERING GEARBOX
POWER ASSISTED SYSTEM (POWER STEERING)
E: INSPECTION
1. BASIC INSPECTION
1) Clean all disassembled parts, and check for wear, damage, or any other faults, then repair or replace as
necessary.
2) When disassembling, check inside of gearbox for water. If any water is found, carefully check boot for
damage, input shaft dust seal, adjusting screw and boot clips for poor sealing. If faulty, replace with new
parts.
Corrective action
Inspection
(1) Bend of input shaft
(2) Damage on serration
Parts
Input shaft
No.
1
2
3
4
5
6
7
8
9
10
11
If the bend or damage is excessive, replace the entire
gearbox.
If the outer wall slips, the lip is worn out or damage is
found. redace it with new one.
Dust seal
(1) Crack or damage
(2) Wear
~~
(1) Adjust the backlash properly.
By measuring turning torque of gearbox and sliding resis-
tance of rack, check if rack and pinion engage uniformly
and smoothly with each other. (Refer to "Service limit".)
(2) Keeping rack pulled out all the way so that all teeth
emerge, check teeth for damage.
Even if abnormality is found in either (1) or (2), replace
the entire aearbox.
Rack and pinion Poor mating of rack with pinion
(1) Bend of rack shaft
(2) Bend of cylinder portion
(3) Crack or damage on cast iron
portion
Replace the gearbox with new one.
If the free play of rack shaft in radial direction is out of the
specified range, replace the gearbox with new one. (Refer
to "Service limit".)
If the free plays of input shaft in radial and axial directions
are out of the specified ranges, replace the gearbox with
new one. (Refer to "Service limit".)
Gearbox unit
(4) Wear or damage on rack bush
( 5 ) Wear on input shaft bearing
Replace. Crack, damaae or deterioration Boot
(1) Looseness of ball joint
(2) Bend of tie-rod
Replace.
Tie-rod
Tie-rod end
Damage or deterioration on dust
seal
Replace.
Replace.
Adjusting screw
swing
Deterioration
Boot clip
Deterioration Replace.
Replace.
Sleeve Damage
(1) Damage to flared surface
Pipes
(2) Damage to flare nut
(3)
Damage to pipe
Replace.
PS-42