Remove/install front spring

AR32.20-B-0200D

Remove/install front spring

12.02.16



Remove and install

1

Detach the front shock absorbers at their bottom fastening

Excessive strokes damage the shock absorbers.

AR32.25-B-0105C

2

Detach the stabilizer side arms

AR32.35-B-2050C

3

Slightly slacken the front wheels, without removing them

AR40.10-B-1100F

Danger!

Risk of life by the vehicle slipping or falling from the lifter

Position the vehicle on a suitable elevator so the wheels of the front axle, rear drive axle and rear auxiliary axle remain supported safely on the four or six elevator support plates, at the elevating points determined by the vehicle manufacturer.

AS00.00-B-0010-01B

4

Support the vehicle on safety stands placed under the side rails, both sides, which permits removal of the blade springs

It should be avoided to jack-up the vehicle on only one side, the opposite wheel remaining on the ground. It should be lifted equally on both sides.

Danger!

Safety measures when tilting the cab

AS60.80-B-0001-01A

5

Tilt the cab to facilitate access

Only for 688.2 trucks.

AR60.80-B-0010B

6

Carefully lift the front axle slightly until the spring articulations are relieved from weight

 Safely support the front axle in this position while removing and installing the springs.

7

Remove the front wheels

AR40.10-B-1100F

8

At front, release the longitudinal steering rod (4) at vehicle left side

The steering rod interferes with the front left side spring removal.

AR46.40-B-0100-01A

9

Remove, at the front articulation, the self-locking nut (5) and the limiting washer (6)



*BA32.20-B-1002-01A

10

Remove, on rear shackle, the self-locking nuts (14), the bolts(13) and the side plates (12)



*BA32.20-B-1002-01A

11

Unscrew the nuts (8), remove the "U" bolts (7) and the positioner

Installing: Sparingly lubricate the "U" bolt threads.

*BR00.45-B-1010-06A



*BA32.20-B-1001-01A

It is recommendable to carry out a later retightening of the "U" bolts, after the vehicle has covered some mileage under laden condition. The vehicle has to be unladen.

12

Lower the front axle so the kingbolt completely clears the housing in the axle

Installing: Apply a thin film of neutral petroleum jelly on the articulation pin. Only the amount required to facilitate installing it.

*BR00.45-B-1001-06A

13

Remove the spring sideways, carefully to prevent damaging the thread of the articulation pin

14

If necessary, disassemble and assemble the front springs

AR32.20-B-0201B

15

If necessary, replace the spring and shackle bushings.

AR32.20-B-0210B

16

Install in reverse order

17

Carry out a final retightening applying the specified torque to the "U" bolts and at the articulations, items (9, 10, 11).

18

Whenever possible, carry out the axle parallelism adjusting and the steering geometry adjusting

Carry out the adjustments following the technical data corresponding to the vehicle utilizing appropriate equipment.

19

Take a test drive to check vehicle behavior.

Número

Denominação

Chassis 688

BA32.20-B-1001-01A

Spring Clip nut on front axle

M12x1.5

Nm

100

M14x1.5

Nm

140

M16x1.5

Nm

-

New clamps

M18x1.5

Nm

-

Maintenance - retightening

Nm

M20x1.5

Nm

-

M24x1.5

Nm

-

BA32.20-B-1002-01A

Front spring in the front and rear support

Hinge pin nut M10

Nm

-

Front spring nut on the trestle-M12x1 .5

Nm

85

Front spring nut on the trestle-M18x1,5

Nm

200

Front spring nut on the trestle-M22x1,5

Nm

-

Front spring nut on the trestle-M24x1,5

Nm

Número

Denominação

Número de pedido

BR00.45-B-1001-06A

Vaseline

-

BR00.45-B-1010-06A

Grease as per DBL 6820.20

-