27B-REAR AXLE HUB ASSEMBLY REMOVAL AND INSTALLATION

REMOVAL AND INSTALLATION

caution

Do not disassemble the rear wheel hub assembly.
The magnetic encoder collects metallic particles easily, because it is magnetized. Make sure that the magnetic encoder should not collect metallic particles. Check that there is not any trouble prior to reassembling it.
When the rear wheel hub assembly is removed/installed, make sure that the magnetic encoder (integrated with inner oil seal) does not contact with surrounding parts to avoid damage.
When removing and installing the rear wheel speed sensor, make sure that its sensor head does not contact with surrounding parts to avoid damage.
The part indicated with * is the bolt with friction coefficient stabilizer. In removal, replace it with a new one.

			Removal steps
<<A>>	>>B<<	1.	Parking brake rear cable connection <Rear brake caliper assembly side>
		2.	Rear wheel speed sensor connection
		3.	Brake hose bracket with brake hose and rear wheel speed sensor wiring harness connection
<<B>>	>>A<<	4.	Driveshaft nut
<<C>>		5.	Caliper assembly
		6.	Brake disk
		7.	Rear wheel hub assembly mounting bolt
<<D>>		8.	Rear wheel hub assembly

Required Special Tools:

MB990211: Slide Hammer
MB990241: Rear Axle Shaft Puller
MB990242: Puller Shaft
MB990244: Puller Bar
MB990767: Front Hub and Flange Yoke Holder
MB991354: Puller Body
MB992700: Lock Nut Chisel

REMOVAL SERVICE POINTS

<<A>> PARKING BRAKE REAR CABLE CONNECTION REMOVAL <REAR BRAKE CALIPER ASSEMBLY SIDE>

Compress the tabs on the cable retainer to pull out the parking brake cable through the parking lever hole of the rear brake caliper assembly.

note	When pulling out the parking brake cable, be careful not to damage the tab on the cable retainer. Example: Insert the 12.8 mm (0.50 inch) hose clip (MB248923) into the parking brake cable. Then push the clip over the cable retainer to protect the tabs.

<<B>> DRIVESHAFT NUT REMOVAL

caution

Make sure that the lock nut chisel is set in the correct direction. Otherwise, the groove or thread in the driveshaft may be broken, or the tip of the chisel may be chipped.
Never use a chisel which tip is damaged.
For how to use the lock nut chisel, refer to the manufacturer's operating instructions.

Set the special tool MB992700 in the groove of the driveshaft with its "UPPER" mark facing upwards. Then strike the staked portion of the driveshaft nut with the chisel and a hammer to raise up.

caution

Be careful not to damage the thread of the driveshaft.

Raise up the staked portion of the driveshaft nut until it does not interfere with the shaft thread.

caution

Never use a impact wrench to loosen the driveshaft nut.
Do not apply the vehicle weight on the wheel bearing with the driveshaft nut loosened. Otherwise, the wheel bearing may be broken.

Use special tool MB990767 to counter the hub as shown in the figure to remove the driveshaft nut.

<<C>> CALIPER ASSEMBLY REMOVAL

1. Remove the caliper assembly with brake hose.

2. Secure the removed caliper assembly with a wire or other similar material at a position where it will not interfere with the removal and installation of the rear wheel hub assembly.

<<D>> REAR WHEEL HUB ASSEMBLY REMOVAL

1. If the rear wheel hub assembly is seized with the rear driveshaft assembly, use special tools MB990242 and MB990244, MB991354 and MB990767 to push the rear driveshaft assembly out from the hub and then remove the rear wheel hub assembly.

2. If the rear wheel hub assembly is seized with the knuckle, use special tools MB990211 and MB990241 {combination (A)}, or MB990211 and MB991354 {combination (B)} to remove the rear wheel hub assembly.

INSTALLATION SERVICE POINTS

>>A<< DRIVESHAFT NUT INSTALLATION

caution

The magnetic encoder collects metallic particles easily, because it is magnetized. Make sure that the magnetic encoder does not collect metallic particles. Check that there is not any trouble prior to reassembling it.
When installing the drive shaft, make sure that it does not contact with the magnetic encoder (integrated with the inner oil seal) to avoid damage.
Do not apply the vehicle weight on the rear wheel hub assembly before fully tightening the driveshaft nuts. Otherwise, the wheel bearing will be broken.

1. Check the hub seated surface for damage or corrosion. Whenever solvent is used for removing the corrosion, the surface should be degreased.

2. Check that the new driveshaft nut can be turned smoothly by hand. Then tighten it until it is seated.

3. Using special tool MB990767, tighten the driveshaft nut.

Tightening torque: 270 ± 27 N·m (199 ± 20 ft-lb)

4. After tightening to the specified torque, check that the nut is seated securely.

5. Use the chisel and a hammer to stake the nut until the center in the staked portion reaches the shown dimension.

6. Finally, check that the nut is not cracked at its staked portion.

>>B<< PARKING BRAKE REAR CABLE CONNECTION INSTALLATION <REAR BRAKE CALIPER ASSEMBLY SIDE>

1. Guide the parking brake cable through the parking lever hole of the rear brake caliper assembly to the cable retainer.

2. Pull back the parking brake cable to assure it is tightly fastened to the cable retainer.