Front Hub Beaings; Front Suspension Strut; Undo Three Bolts Securing Bearing Assembly To The Swivel Hub; Remove The Bearing Assembly And Brake Shield From The Hub - Opel Zafira B MPV 2006 Owners Workshop Manual

21 Refit the brake hydraulic hose to the
suspension strut and secure with the retaining
clip.
22 Using the method employed on removal
to prevent rotation, tighten the driveshaft
retaining nut through the stages given in the
Specifications.
23 Refit the roadwheel, then lower the vehicle
to the ground and tighten the roadwheel bolts
to the specified torque.
Note: The front hub bearing and integral ABS
wheel speed sensor is
a
sealed unit and no
repairs are possible. If the bearing is worn
or the speed sensor is faulty, a new bearing
assembly must be obtained.
Checking
1 Firmly apply the handbrake, then jack up
the front of the car and support it securely on
axle stands (see Jacking and vehicle support).
Remove the roadwheel.
2 A dial test indicator (DTI) will be required to
measure the amount of play in the bearing.
Locate the DTI on the suspension strut and
zero the probe on the brake disc.
3 Lever the hub in and out and measure the
amount of play in the bearing.
4 To measure the bearing lateral and radial
run-out, undo the two bolts securing the brake
caliper mounting bracket to the swivel hub.
Slide the mounting bracket, complete with
brake caliper and pads off the brake disc, and
tie it to the coil spring using wire or a cable
tie.
5 Undo the securing screw and remove the
brake disc from the wheel hub.
6 To check the lateral run-out, locate the DTI
on the suspension strut and zero the probe
on the front face of the hub flange. Rotate the
hub and measure the run-out.
7 To check the radial run-out, zero the DTI
probe on the upper face of the extended
portion at the centre of the hub. Rotate the
hub and measure the run-out.
8 If the play or run-out exceeds the specified
amounts, renew the hub bearing as described
below.
9 If the bearing is satisfactory, refit the
brake disc and tighten its retaining screw
securely.
10 Slide the brake pads, caliper and mounting
bracket over the disc and into position on
the swivel hub. Fit the two caliper mounting
bracket retaining bolts and tighten them to the
specified torque (see Chapter 9).
11 Refit the roadwheel, then lower the vehicle
to the ground and tighten the roadwheel bolts
to the specified torque.
Renewal
Note: New hub bearing retaining bolts will be
required for refitting.
3.13 Undo the three bolts (arrowed) securing
the bearing assembly to the swivel hub .••
12 Carry out the operations described in
Section 2, paragraphs 1 to 11.
13 Undo the three bolts securing the bearing
assembly to the swivel hub (see illustration).
14 Remove the bearing and the brake shield
from the swivel hub (see illustration).
15 Thoroughly clean the swivel hub and
brake shield, then place the shield in position
on the swivel hub.
16 Locate the hub bearing over the brake
shield and into the swivel hub. Position the
bearing so that the wheel speed sensor wiring
connector is toward the brake caliper side of
the swivel hub (ie, towards the front of the
vehicle). Align the retaining bolt holes and fit
the three new bolts.
17 Tighten the retaining bolts progressively
to the specified Stage 1 torque setting using a
torque wrench, and then through the specified
Stage 2 and Stage 3 angles, using an angle
tightening gauge (see illustrations).
18 Ensure that the driveshaft outer constant
velocity joint and hub splines are clean, then
slide the hub onto the driveshaft splines. Fit
the new driveshaft retaining nut, tightening it
by hand only at this stage.
19 Locate the lower arm balljoint in the swivel
hub. Insert the clamp bolt from the front of the
swivel hub, so that its threads are facing to
the rear. Fit the new nut to the clamp bolt, and
tighten it to the specified torque.
20 Engage the track rod balljoint in the swivel
hub, then fit the new retaining nut and tighten
it to the specified torque setting.
21 Refit the brake disc together with the brake
caliper and pads as described in Chapter 9.
3.17a Tighten the retaining bolts to the
Stage 1 torque setting using a torque
wrench ...
Suspension and steering 10•5
3.14 .•. then remove the bearing assembly
and brake shield from the hub
22 Reconnect the ABS wheel speed sensor
wiring connector and, where applicable, the
brake pad wear warning indicator wire. Secure
the wiring in the relevant support brackets and
clips.
23 Refit the brake hydraulic hose to the
suspension strut and secure with the retaining
clip.
24 Using the method employed on removal
to prevent rotation, tighten the driveshaft
retaining nut through the stages given in the
Specifications.
25 Refit the roadwheel, then lower the vehicle
to the ground and tighten the roadwheel bolts
to the specified torque.
Note: New strut-to-swivel hub bolts and nuts,
strut retaining clamp and strut link rod nut,
will be required for refitting. Ideally, both front
suspension struts should be renewed at the
same time in order to maintain good steering
and suspension characteristics.
Removal
1 Apply the handbrake, then jack up the front
of the vehicle and support it on axle stands
(see Jacking and vehicle support). Remove
the front roadwheel.
2 Unclip the ABS wheel speed sensor wiring
guide from the brake hydraulic hose, then
extract the retaining clip and release the
3.17b ... and then through the Stage 2
and 3 angles, using an angle tightening
gauge