Front Suspension
FRONT HUB ASSEMBLY
Remove and refit
Removing
- Remove road wheel.
- Through aperture in disc shield remove five bolts (1) and washers holding hub assembly to brake disc.
- Remove hub grease cap. extract split pin. and remove nut and washer from stub axle (2); withdraw hub by hand.
Refitting
- Pack hub with specified grease and refit to stub axle
- Fit bearing. nut and washer (3) to stub axle and tighten nut to give end-float of 0.05 mm to 0.15 mm (0.002 in to 0.006 in).
NOTE: End-float is measured by fitting a dial test indicator with the button against the hub.
- Fit new split pin
- Refit grease cap (4).
- Ensure that vent hole is clear.
- Replace road wheel
FRONT HUB BEARINGS AND GREASE SEAL
Remove and refit
Removing
- Remove front hub assembly as detailed above.
- Extract grease seal (1).
- Withdraw inner bearing race (2) if necessary
- Drift bearing cups (3) from hub. grooves are provided in the abutment shoulders for this purpose
Refitting
- Tap replacement cups into position. ensuring that they are seated square to abutments, if bearings have been removed.
- Lubricate large bearing race and fit to cup.
- Fit new grease seal. using suitable bell-piece and tapping seal squarely into position.
- Replace front hub assembly and road wheel.
FRONT HUB STUB AXLE
Remove and refit
Service tool: Steering joint taper separator JD 24
Removing
- Jack up front of car and place stand beneath spring seat pan
- Lower car to firmly locate on stand and remove road wheel.
- Remove self-locking nut and washer securing steering tie-rod ball joint (1).
- Separate rod from steering arm using tool JD 24
- Suspend brake caliper by wires or strong cord from damper top mounting to prevent damage to hoses when ball-joints are disconnected.
- Break locking wire and remove two bolts and spring washers (2) securing steering arm and brake caliper to stub axle carrier.
- Swing caliper aside.
NOTE: Record number of shims fitted between steering arm and brake caliper.
- Recover large plain washer from between disc shield and caliper.
- Remove two nuts. bolts and plain washers (3) securing upper ball Joint to upper wishbone levers.
NOTE: Take careful note of fitted position of bolts and also position of packing piece and shims. these control castor angle.
- Remove self-locking nut and washer (4) and separate lower ball-joint from wishbone. draw assembly from car.
- Remove grease cap. split pin and castellated nut securing hub assembly to stub axle; draw assembly clear
- Remove nyloc nut and plain washer (5) securing stub axle to stub axle carrier.
- Support stub axle carrier and drift out stub axle (6).
Refitting
CAUTION: Bolts securing upper ball joint in upper wishbone must be fitted from front of car towards rear.
- Reverse removal operations. ensuring that all shims are correctly replaced.
- Tighten bolts and nuts to correct torque figures. wire lock caliper bolts and check wheel alignment castor and camber angles.
FRONT HUB STUB CARRIER
Remove and refit
Service tool: Steering joint taper separator JD 24
Removing
- Remove front hub stub axle.
- Remove two nyloc nuts (1) securing clamps at bottom of disc shields. remove attachment plate and rear disc shield.
- Remove bolt (2) spring and plain washer securing steering arm and forward disc shield to carrier
- Remove self-locking nut and washer (3) and separate upper ball-Joint from stub axle carrier. using separator JD 24. Remove retaining ring and withdraw rubber gaiter (4).
- Withdraw retainer (5) from top of ball pin.
- Tap back tab washers and unscrew tour setscrews securing ball pin cap (6) to stub axle carrier
- Remove cap, shims, lower ball pin socket. ball pin and spigot (7).
Refitting
CAUTION: In order to obtain correct adjustment of the ball joint it is necessary to shim to the correct clearance. Excessive wear on ball pin and socket must not be adjusted shims. Worn parts must be renewed.
- Fit spigot. ball pin, socket. shims. ball pin cap and screws.
- Remove shims one by one until the ball pin is tight in its socket with screws fully tightened.
- Remove screws. ball pin cap. shims and socket.
- Add shims to the value of 0.10 mm to 0.15 mm (0.004 in to 0.006 in).
- Lightly grease ball pin and socket (1)
- Refit socket, ball pin cap and new tab washers
- Refit and tighten screws Ball pin should be slightly stiff in socket.
- Fit upper ball joint to stub axle carrier and secure using one nyloc nut and washer (2).
- Fit stub axle and secure using new nyloc nut and plain washer (3).
- Assemble forward end of steering arm to its location and loosely secure using one bolt, plain and spring washer (4).
- Fit hub to stub axle.
- Locate brake caliper on stub axle to carrier. and secure with long bolt (5) and spring washer through steering arm.
- Fit shims removed in dismantling operations between steering arm and caliper.
- Locate disc shields and secure using clamps, nyloc nuts (6) and upper caliper bolt.
- Fit large plain washer between disc shield and caliper.
- Tighten bolts to correct torque
- Fit stub axle carrier to wishbones and steering tie rod. disconnecting wire or cord supporting caliper.
- Wire lock brake caliper bolts (7), and check wheel alignment, castor and camber angles