Wheel Bearing Inspection - Subaru IMPREZA 2004 Service Manual

PERIODIC MAINTENANCE SERVICES
24.Wheel Bearing
A: INSPECTION
1. FRONT WHEEL BEARING
NOTE:
Inspect the condition of front wheel bearing grease.
1) Jack-up the front of vehicle.
2) While holding the front wheel by hand, swing it in
and out to check bearing free play.
3) Loosen the wheel nuts and remove front wheel.
4) If bearing free play exists in step 2) above, at-
tach a dial gauge to the hub and measure axial dis-
placement in axial direction.
Service limit:
Straight-ahead position within 0.05 mm
(0.0020 in)
5) Remove the bolts and self-locking nuts, and ex-
tract transverse link from front crossmember.
6) Remove the SFJ of front drive shaft from trans-
mission. <Ref. to DS-19, Front Axle.>
7) While supporting the front drive shaft horizontal-
ly with one hand, turn the hub with the other to
check for noise or binding.
If the hub is noisy or binds, disassemble the front
axle and check condition of oil seals, bearing, etc.
(A)
(B)
(C)
(D)
(A) Inner oil seal
(B) Snap ring
(C) Bearing
(D) Housing
(E) Outer oil seal
(F) Hub bolt
(G) Hub
2. REAR WHEEL BEARING
• AWD
1) Jack-up the rear of vehicle.
2) While holding the rear wheel by hand, swing it in
and out to check bearing free play.
3) Loosen the wheel nuts and remove rear wheel.
Wheel Bearing
(F)
(G)
(E)
PM-00061
PM-40
4) If the bearing free play exists in step 2) above,
attach a dial gauge to the hub COMPL and mea-
sure axial displacement in axial direction.
Service limit:
Straight-ahead position within 0.05 mm
(0.0020 in)
5) Remove the DOJ of rear drive shaft from rear dif-
ferential. <Ref. to DS-44, Rear Drive Shaft.>
6) While supporting the rear drive shaft horizontally
with one hand, turn the hub COMPL with the other
to check for noise or binding.
If the hub COMPL is noisy or binds, disassemble
the rear axle and check condition of oil seals, bear-
ings, etc.
(A)
(B)
(C)
(D)
(A) Inner oil seal
(B) Rear housing
(C) Bearing
(D) Snap ring
(E) Outer oil seal
(F) Tone wheel
(G) Hub bolt
(H) Hub
(I) Socket bolt
• FWD
1) Jack-up the rear of vehicle.
2) While holding the rear wheel by hand, swing it in
and out to check bearing free play.
3) Loosen the wheel nuts and remove rear wheel.
4) If the bearing free play exists in step 2) above,
attach a dial gauge to the hub COMPL and mea-
sure axial displacement in axial direction.
Service limit:
Straight-ahead position within 0.05 mm
(0.0020 in)
(F)
(G)
(H)
( I )
(E)
PM-00062