1 Chock the front wheels then jack up the rear of the car and securely support it on axle stands. Remove the relevant rear roadwheel(s).

Shock absorber of Fiat Punto

Removal

2 Using a trolley jack positioned under the rear axle trailing arm, raise the trailing arm to take the strain from the shock absorber.
3 Slacken and withdraw the shock absorber lower retaining bolt (see illustration).



Shock absorber lower retaining bolt (arrowed)


4 Lower the jack and allow the shock absorber to separate from the trailing arm. Take care to avoid displacing the coil spring.
5 Slacken and withdraw the shock absorber upper retaining bolt.
6 Withdraw the shock absorber from its upper mounting and remove it from under the car.
7 Examine the shock absorber for signs of fluid leakage or damage. While holding it in an upright position, test the operation of the shock absorber by moving the piston through a full stroke, and then through short strokes of 50 to 100 mm. In both cases, the resistance felt should be smooth and continuous. If the resistance is jerky, or uneven, or if there is any visible sign of wear or damage, renewal is necessary.

Refitting

8 Refitting is a reversal of removal. Tighten the shock absorber upper and lower retaining bolts to the specified torque, but delay this operation until the full weight of the car is resting on its road wheels.

Coil spring of Fiat Punto

Removal

9 Using a trolley jack positioned under the rear axle trailing arm, raise the trailing arm to take the strain from the shock absorbers.
10 Slacken and withdraw the shock absorber upper retaining bolts on both sides.
11 Lower the trailing arm gradually using a trolley jack, until the coil spring is released from its lower seat on the trailing arm and its upper seat on the underbody. Make a note of the orientation of the coil spring, to aid correct refitting later.

Refitting

12 Refitting is a reversal of removal. Tighten the shock absorber upper retaining bolts to the specified torque, but delay this operation until the full weight of the car is resting on its road wheels,

Stub axle of Fiat Punto

Removal

13 Remove the rear hub assembly.
14 Remove the rear brake shoes.
15 Using a brake hose clamp, clamp the brake flexible hydraulic hose located adjacent to the rear axle mounting.
16 Clean the brake backplate around the wheel cylinder hydraulic pipe union, then unscrew the union nut and disconnect the hydraulic pipe. Cover the open ends of the pipe and the wheel cylinder to prevent dirt ingress.
17 On models with ABS, slacken and remove the bolt securing the rear wheel speed sensor to the rear of the stub axle and withdraw the sensor from its location. Suspend the sensor away from the working area, to avoid the possibility of damage.
18 Undo the two bolts and remove the brake backplate from the stub axle.
19 Undo the four nuts, withdraw the bolts and remove the stub axle from the rear axle bracket (see illustration).



Stub axle retaining bolt nuts (arrowed)


Refitting

20 Ensure that the stub axle of Fiat Punto and rear axle bracket mating faces are clean, then locate the stub axle in position. Refit the retaining bolts and nuts and tighten the nuts to the specified torque.
21 Locate the brake backplate on the stub axle, refit the bolts and tighten them securely. Connect the brake pipe to the wheel cylinder and securely tighten the union nut. Remove the brake hose clamp from the flexible hydraulic hose.
22 Refit the rear brake shoes.
23 Refit the rear hub assembly.
24 Ensure that the mating faces of the wheel speed sensor and the stub axle are clean, and apply a smear of high melting-point brake grease to the sensor location in the stub axle. Clean the end face of the sensor, locate it in place and secure with the retaining bolt.
25 On completion, bleed the brake hydraulic system. Note that if no other part of the system has been disturbed, it should only be necessary to bleed the relevant rear circuit.

Rear axle assembly of Fiat Punto

Note: The rubber-in-torsion pivot bushes at the front end of the rear axle assembly are not available separately. If either is worn or damaged, the complete rear axle assembly must be replaced.

Removal

26 Remove the rear brake shoes on both sides.
27 Using brake hose clamps, clamp the brake flexible hydraulic hoses located adjacent to each rear axle mounting.
28 Clean the area around the brake pipe-to-flexible hose union nuts, and unscrew the pipe unions on each side. Extract the retaining clips and detach the flexible hoses from the brackets on the rear axle. Cover the open ends of the pipes and hoses to prevent dirt ingress.
29 On models with ABS, slacken and remove the bolts securing the rear wheel speed sensors to the rear of the stub axles and withdraw the sensors from their location. Suspend the sensors away from the working area, to avoid the possibility of damage.
30 Release the handbrake cables, and where applicable, the rear wheel speed sensor cables from their clips on the rear axle.
31 Remove both rear coil springs.
32 Suitably support the rear axle assembly of Fiat Punto on a trolley jack and engage the help of an assistant.
33 Undo the bolts securing the rear axle mounting brackets to the underbody on both sides. Slowly lower the jack and guide the axle assembly down and out from under the car.

Refitting

34 Guide the axle assembly into position, refit the mounting bracket retaining bolts and tighten them to the specified torque.
35 Refit the rear coil springs as described previously in this Section.
36 Ensure that the mating faces of the wheel speed sensors and the stub axles are clean, and apply a smear of high melting-point brake grease to the sensor locations in the stub axles. Clean the end face of the sensors locate them place and secure with the retaining bolts.
37 Refit the flexible brake hydraulic hoses to their mounting brackets and secure with the retaining clips. Reconnect the brake pipe union to each hose and tighten the union nut securely. Remove the brake hose clamps from the hoses.
38 Secure the handbrake cables, and where applicable, the rear wheel speed sensor cables In their clips on the rear axle.
39 Refit the rear brake shoes than bleed the brake hydraulic system. Note that if no other part of the system has been disturbed, it should only be necessary to bleed the rear circuits.