Remove/install trailing arm

AR35.20-B-0100A

Remove/install trailing arm

12.02.16



Remove and install

 Work procedures are related to 6x4 trucks equipped with HD 4 or HD 7 rear shafts. Procedures to remove and install the springs on the central supports are basic and may show some differences due to the specific characteristics of each type of shaft.

 The most appropriate place to carry out the tension bars removal and installation work is a service ditch equipped with lifting system.

1

If there is not service ditch available:

Put the vehicle on a flat and leveled place in which it is possible to work safely

Apply shims to the vehicle front wheels to avoid accidental movement.

2

Disconnect the battery negative cable or turn off the general key

 Disconnect the battery negative cable releasing its end fastened to the chassis structure. Avoid disconnecting the negative cable end fastened to the battery borne.

Danger!

Take appropriate measures when lifting or lowering the vehicle to avoid accidents.

Risk of serious accident.

 Do not raise the vehicle supporting the jack on the rear shaft central case.

3

Lift the vehicle and support it on bearing brackets conveniently placed under the side members, in front and behind the shafts, on both sides of the vehicles, so that it is possible to remove the tension bars.

 Observe additional care to lift the vehicle when it is loaded.

 The vehicle must not be lifted only from one side, leaving the wheel on the opposite side on the ground. The vehicle should be equally lifted on both sides.

4

On lower tension bars:

Release the self-locking nuts (5) and remove the front and rear fastening screws (4) from the lower tension bars (3) and remove the tension bars

Install: Lubricate threads with a light layer of grease and use new self-locking nuts.

*BR00.45-B-1003-06A



*BA32.20-B-1004-03E

5

Cut the plastic clamps (8) that hold the flexible piping on the upper tension bars and move the piping away

Install: Accommodate the flexible piping and fasten them to the upper tension bars with new plastic clamps (8).

6

On upper tension bars:

Release the self-locking nuts (5) and remove the front and rear fastening screws (4) from the upper tension bars (7) and remove the tension bars

Install: Lubricate threads with a light layer of grease and use new self-locking nuts.

*BR00.45-B-1003-06A



*BA32.20-B-1004-03E

7

Replace the tension bars rubber-metal block

AR35.20-B-0100-01A

8

Install in reverse order

Danger!

Take appropriate measures when lifting or lowering the vehicle to avoid accidents.

Risk of serious accident.

9

Remove the bearing brackets and lower the Vehicle

 In case it is not possible to use an appropriate ditch.

10

Check and, if necessary, regulate the shaft parallelism and the steering geometry

 Carry out adjusting according to the vehicle's technical data.

11

Carry out a test run to check the vehicle behavior

Número

Denominação

Vehicles 386, 388, 682, 693, 695, 696, 958.1

BA32.20-B-1004-03E

Attachment of the tension bars

Third axle

M20

Nm

420...570

M24

Nm

670

Número

Denominação

Vehicles 386.3

Vehicle 682.3

BA32.35-B-1001-01B

Strain rod lock nuts in the rear axle

M20x1.5

Nm

355

355

M20x1.5 with flange

Nm

-

-

Número

Denominação

Vehicle 693.348; 958.170/174

BA32.35-B-1001-01B

Strain rod lock nuts in the rear axle

M20x1.5

Nm

355

M20x1.5 with flange

Nm

480...560

Número

Denominação

Número de pedido

BR00.45-B-1003-06A

Grease as per DBL 6804 - Class 267.0

-