GR00002200-27 rear axle.pdf

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27-1
GROUP 27
CONTENTS
GENERAL DESCRIPTION. . . . . . . . .
REAR AXLE DIAGNOSIS . . . . . . . . .
INTRODUCTION TO REAR AXLE
DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . .
REAR AXLE DIAGNOSTIC
TROUBLESHOOTING STRATEGY . . . . . .
SYMPTOM CHART. . . . . . . . . . . . . . . . . . .
SYMPTOM PROCEDURE . . . . . . . . . . . . .
27-2
27-2
27-2
27-2
27-2
27-3
REAR HUB ROTARY-SLIDING
RESISTANCE CHECK . . . . . . . . . . . . . . . .
HUB BOLT REPLACEMENT. . . . . . . . . . . .
27-4
27-4
REAR AXLE HUB ASSEMBLY . . . . .
REMOVAL AND INSTALLATION . . . . . . . .
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . .
27-6
27-6
27-7
KNUCKLE . . . . . . . . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION . . . . . . . .
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . .
27-8
27-8
27-9
SPECIAL TOOLS. . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE. . . . . . . . . . .
WHEEL BEARING END PLAY CHECK . . .
27-3
27-4
27-4
SPECIFICATIONS . . . . . . . . . . . . . . .
FASTENER TIGHTENING
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . .
SERVICE SPECIFICATIONS . . . . . . . . . . .
27-9
27-9
27-9
27-2
.
REAR AXLE
GENERAL DESCRIPTION
GENERAL DESCRIPTION
The rear axle consists of a knuckle, rear hub, unit
bearing. The unit bearing is press-fitted to the rear
hub and bolted to the knuckle. Also, the unit bearing
utilizes the same type of double row angular contact
ball bearing as does the front axle.
ABS rotor for detecting the vehicle speed is located
on the hub assembly, and a speed sensor is located
on the knuckle.
M1271000100155
OIL SEAL
KNUCKLE
REAR HUB
CAP
OIL SEAL
UNIT BEARING
ABS ROTOR
<VEHICLES WITH ABS>
AC001179 AB
REAR AXLE DIAGNOSIS
INTRODUCTION TO REAR AXLE DIAGNOSIS
Noise from the rear axle may be caused by defects in
the components.
M1271004100168
REAR AXLE DIAGNOSTIC TROUBLESHOOTING STRATEGY
Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure that you
have exhausted most of the possible ways to find a
rear axle fault.
1. Gather information from the customer.
M1271004200165
2. Verify that the condition described by the
customer exists.
3. Find the malfunction by following the Inspection
Chart for Trouble Symptoms.
4. Verify malfunction is eliminated.
M1271004300162
SYMPTOM CHART
SYMPTOM
Abnormal noise
INSPECTION PROCEDURE
1
REFERENCE PAGE
P.27-3
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REAR AXLE
SPECIAL TOOLS
27-3
M1271004400158
SYMPTOM PROCEDURE
INSPECTION PROCEDURE 1: Abnormal Noise
DIAGNOSIS
STEP 1. Check the wheel nut for looseness.
Q: Are the wheel nuts loosened?
YES :
Tighten the nuts, then go to Step3.
NO :
Go to Step 2.
STEP 3. Check the brake disc for bent or
distortion.
Q: Is the brake disc in good condition?
YES :
Go to Step 4.
NO :
Replace the part, then go to Step 4.
STEP 4. Check trouble symptoms.
STEP 2. Check the wheel bearing for wear or
damage.
Q: Is the wheel bearing in good condition?
YES :
Go to step 3.
NO :
Replace the part, then go to Step 4.
Q: Are any noises generated?
YES :
Return to Step 1.
NO :
This diagnosis is complete.
SPECIAL TOOLS
TOOL
TOOL NUMBER AND
NAME
MB990767
End yoke holder
SUPERSESSION
MB990767-1
Hub fixing
M1271000600235
APPLICATION
B990767
MB991618
Hub bolt remover
General service tool
Hub bolt removal
MB991618
MB991248
Inner shaft remover
Tool not available
ABS rotor removal
MB991248
MB990635 or MB991113 MB991113-1, MB990635- Ball joint disconnection
Steering linkage puller
01 or General service tool
MB990635
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27-4
REAR AXLE
ON-VEHICLE SERVICE
ON-VEHICLE SERVICE
WHEEL BEARING END PLAY CHECK
M1271000900195
1. For vehicles with rear disc brakes, remove the caliper
assembly, suspend the caliper assembly with a wire and
remove the brake disc.
2. For vehicles with rear drum brakes, remove the brake drum.
3. Check the bearing's end play.
Place a dial gauge against the hub surface; then move the
hub in the axial direction and check whether or not there is
end play.
Limit: 0.05 mm (0.002 inch)
4. If the play exceeds the limit value, replace the rear hub
assembly.
AC001180
REAR HUB ROTARY-SLIDING RESISTANCE
CHECK
M1271001100136
1. For vehicles with rear disc brakes, remove the caliper
assembly, suspend the caliper assembly with a wire and
remove the brake disc.
2. For vehicles with rear drum brakes, remove the brake drum.
3. After turning the hub a few times to seat the bearing, wind a
rope around the hub bolt and turn the hub by pulling at a 90
degree angle with a spring scale. Measure to determine
whether or not the rotary-sliding resistance of the rear hub is
at the limit value.
Limit: 18 N⋅m (13 ft-lb)
4. If the rotary-sliding resistance exceeds the limit value,
replace the rear hub assembly.
AC001181
HUB BOLT REPLACEMENT
M1271001000128
Required Special Tools:
•
MB990767: End Yoke Holder
•
MB991618: Hub Bolt Remover
1. For vehicles with rear disc brakes, remove the caliper
assembly, suspend the caliper assembly with a wire and
remove the brake disc.
2. For vehicles with rear drum brake, remove the brake drum.
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REAR AXLE
ON-VEHICLE SERVICE
MB991618
MB990767
27-5
3. Pull the hub bolt out using special tools MB990767 and
MB991618.
NOTE: For vehicles with drum brakes, the hub bolts should
be removed near the retainer spring installation position in
order to maintain enough clearance for removal.
AC001182AB
MB990767
PLAIN
WASHER
4. Install the plain washer to the new hub bolt, and install the
bolt with a nut.
AC001183 AB
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