Subaru 2004 LEGACY, Service Manual

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PS-60
POWER ASSISTED SYSTEM (POWER STEERING)
Steering Gearbox [RHD Model]
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.
No. Parts INSPECTION Corrective action
1 Input shaft
(1) Bend of input shaft
(2) Damage on serration If the bend or damage is excessive, replace the entire
gearbox.
2 Dust seal
(1) Crack or damage
(2) Wear If the outer wall slips, the lip is worn out or damage is
found, replace it with a new one.
3 Rack & Pinion Poor mating of rack with pinion
(1) Adjust the backlash properly.
By measuring turning torque of gearbox and sliding resis-
tance of rack, check if rack & 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 gearbox.
4 Gearbox unit
(1) Bend of rack shaft
(2) Bend of cylinder portion
(3) Crack or damage on cast iron
portion
Replace the gearbox with a new one.
(4) Wear or damage on rack bush
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”.)
(5) Wear on input shaft bearing
If the free play of rack shaft in radial and axial direction is
out of the specified range, replace the gearbox with a new
one. (Refer to “Service limit”.)
5 Boot Crack, damage or deterioration Replace.
6 Tie-rod
(1) Looseness of ball joint
(2) Bend of tie-rod
Replace.
7 Tie-rod end
Damage or deterioration on dust
seal
Replace.
8
Adjusting screw
spring
Deterioration Replace.
9 Boot clip Deterioration Replace.
10 Sleeve Damage Replace.
11 Pipes
(1) Damage to flared surface
(2) Damage to flare nut
(3) Damage to pipe
Replace.