DAF LF45, LF55 Series. Manual - part 247

©

 200508

3-3

Inspection and adjustment

ZF 6S-850 GEARBOX

ΛΦ45/55 series

3

5

3.3 INSPECTION AND ADJUSTMENT, SECONDARY SHAFT AXIAL PLAY

Inspection and adjustment, secondary shaft 
axial play
1.

Press the outermost bearing race uniformly 

so that the bearing is free of play. Rotate the 

secondary shaft constantly while pressing, 

so that the bearing gets set.

2.

Use a depth gauge to determine the distance 

between the outer bearing race and the 

gearbox housing (A).

3.

Compare the measured value with the 

specified permissible value. See "Technical 

data".

4.

If necessary, adjust the axial play by means 

of another adjusting ring.

5.

Calculate the play for the correct size of the 

adjusting ring as follows:

V3 00 402

A

Distance A

2.95 mm

Gasket thickness

+0.40 mm

Play

(0 - 0.1) - 0.05 mm

Required adjusting ring =

3.30 

≥ 0.05 mm

ZF 6S-850 GEARBOX

3-4

©

 200508

Inspection and adjustment

5

ΛΦ45/55 series

3

©

 200508

4-1

Removal and installation

ZF 6S-850 GEARBOX

ΛΦ45/55 series

3

5

4. REMOVAL AND INSTALLATION

4.1 REMOVING AND INSTALLING GEARBOX, BE ENGINE

Removing gearbox assembly
1.

Make sure there are no loose items in the 

cab. Tilt the cab.

2.

Disconnect the negative clamp of the 

battery.

3.

Remove the gearbox cable harness and 

secure it.

4.

Loosen the tachometer connection.

5.

Remove the shift control by loosening the 

torque rod bracket and the lever on the 

selector shaft.

6.

Remove the prop shaft and secure it so that 

it does not interfere with further operations.

7.

Remove the exhaust pipe between the 

engine brake and the silencer.

8.

Remove the clutch servo. No air or hydraulic 

pipes need be removed. Secure the servo 

and ensure that no one in the cab can 

operate the clutch pedal as long as the servo 

is not fitted.

9.

Place a jack under the gearbox and remove 

the bolts around the clutch housing.

10. Use the jack to pull the gearbox away from 

the engine and remove the gearbox.

V300407

4

5

ZF 6S-850 GEARBOX

4-2

©

 200508

Removal and installation

5

ΛΦ45/55 series

3

Installing gearbox assembly
1.

Before positioning the gearbox, one gear 

should be engaged in order to allow the input 

shaft to slide into the clutch plate during 

installation. Also, apply a small amount of the 

specified grease to the input shaft.

2.

Fit the thrust bearing.

3.

Use the jack to move the gearbox towards 

the engine and fit the attachment bolts 

around the gearbox.

4.

Install the clutch servo and tighten the 

attachment bolts.

5.

Fit the exhaust pipe between the engine 

brake and the silencer.

6.

Fit the drive flange.

7.

Fit the shift control.

8.

Fit the cable harness and tachometer 

connection.

9.

Connect the negative clamp of the battery.

10. Inspect the shift control.

11. Check the oil level after the gearbox has 

been installed.

12. If a gearbox of a different type is mounted, or 

a gearbox with a different reduction, this 

should be reported. If the correct data are 

present, they can be input into the VIC using 

DAVIE XD.