DAF LF45, LF55 Series. Manual — part 246

©

200508

2-3

Description of components

ZF 6S-850 GEARBOX

ΛΦ45/55 series

3

5

Double-cone synchronisation
As a result of the speed difference to be

eliminated in the lower gears, the synchronisation

forces may be considerable. In order to achieve

effective synchronisation, a synchroniser with a

double cone is used.

This synchroniser consists of an outer and an

inner ring (synchromesh rings) connected to the

main shaft of the gearbox by means of the

selector sleeve support.

The ring between the two synchromesh rings is

connected to the gear wheel by means of the

selector ring.

When the selector sleeve moves into the selector

ring, two synchronisation surfaces are active.

A

B

C

7 3

2

V301005

A.

Not connected

B.

Synchronise

C.

Connected

W 3 03 047

ZF 6S-850 GEARBOX

2-4

©

200508

Description of components

5

ΛΦ45/55 series

3

©

200508

3-1

Inspection and adjustment

ZF 6S-850 GEARBOX

ΛΦ45/55 series

3

5

3. INSPECTION AND ADJUSTMENT

3.1 CHECKING GEARBOX OIL LEVEL

To prevent skin injury, avoid

unnecessary contact with the

drained oil.

ZF 6S-850 gearbox
1.

Position the vehicle on a level surface.

2.

Wait for some minutes to allow the oil to flow

back.

3.

Remove the level check plug and check the

oil level.

4.

The oil level must reach the rim of the level

check/filler opening (A).

5.

After checking the oil level, tighten the level

check plug to the specified torque. See

"Technical data".

}

B

M3038

A

ZF 6S-850 GEARBOX

3-2

©

200508

Inspection and adjustment

5

ΛΦ45/55 series

3

3.2 INSPECTION AND ADJUSTMENT, INPUT SHAFT BEARING AXIAL PLAY

ZF 6S-850 gearbox
1.

Remove the gearbox. See "Removal and

installation".

2.

Remove the gearbox front cover from the

input shaft. See "Removal and installation".

3.

Press the outermost bearing race uniformly

so that the bearing is free of play. Constantly

rotate the input shaft while applying pressure

so that the bearing is set.

4.

Use a depth gauge to determine the depth of

the chamber in the gearbox front cover,

distance A.

5.

Install a new gasket in the gearbox housing.

Use a depth gauge to determine the height

the ball bearing protrudes above the gearbox

housing, distance B.

6.

Calculate the play as follows. See the table

below.

7.

Compare the calculated value with the

maximum permissible axial play. See

"Technical data".

8.

If necessary, adjust the axial play by means

of another adjusting ring.

9.

Fit a new gasket in the gearbox front cover

and fit it on the gearbox. See "Removal and

installation".

10. Fit the attachment bolts. Tighten the bolts to

the specified torque. See "Technical data".

11. Fit the gearbox. See "Removal and

installation".

B

A

V3 00 435

Distance A

8.05 mm

Distance B

- 7.90 mm

Play

0.15 mm