Discovery 2. Manual — part 153

AUTOMATIC GEARBOX - ZF4HP22 - 24

REPAIRS

44-43

Pump - fluid

$% 44.32.01

Remove

1. Remove intermediate plate gasket.

+

AUTOMATIC GEARBOX - ZF4HP22

- 24, REPAIRS, Gasket - intermediate plate.

2. Remove 8 bolts securing fluid pump to

intermediate plate and carefully remove pump
from intermediate plate.

3. Note position and remove pump locating dowel.
4. Remove and discard 'O' ring from pump

housing.

Refit

1. Clean pump housing and mating face on

intermediate plate with lint free cloth.

2. Lubricate new 'O' ring with transmission fluid

and fit to pump housing.

3. Position pump locating dowel into intermediate

plate.

4. Align fluid pump to dowel and position in

intermediate plate.

5. Fit bolts and tighten in a diagonal sequence to

10 Nm (7 lbf.ft)

6. Position LRT-44-003/1 into pump and check

that the pump rotors turn freely.

7. Fit intermediate plate gasket.

+

AUTOMATIC GEARBOX - ZF4HP22

- 24, REPAIRS, Gasket - intermediate plate.

M44 1336

M44 1341

M44 1342

LRT-44-003/1

AUTOMATIC GEARBOX - ZF4HP22 - 24

44-44

REPAIRS

Seal - rear extension housing

$% 44.20.18

Remove

1. Remove transfer box

+

TRANSFER BOX - LT230SE,

REPAIRS, Transfer box - Diesel.

+

TRANSFER BOX - LT230SE,

REPAIRS, Transfer box - V8.

2. Drain automatic gearbox oil.

+

MAINTENANCE, PROCEDURES,

Automatic gearbox.

3. Remove rear extension housing oil seal from

gearbox.

Refit

1. Clean oil seal recess in gearbox and running

surface on input shaft.

2. Lubricate oil seal running surface with

transmission oil.

3. Using tool LRT-44-001 fit oil seal to extension

housing.

4. Fit transfer box

+

TRANSFER BOX - LT230SE,

REPAIRS, Transfer box - Diesel.

+

TRANSFER BOX - LT230SE,

REPAIRS, Transfer box - V8.

5. Fill automatic gearbox with oil.

+

MAINTENANCE, PROCEDURES,

Automatic gearbox.

AUTOMATIC GEARBOX - ZF4HP22 - 24

REPAIRS

44-45

Gasket - rear extension housing.

$% 44.20.19

Remove

1. Drain automatic gearbox oil.

+

MAINTENANCE, PROCEDURES,

Automatic gearbox.

2. Remove transfer gearbox.

+

TRANSFER BOX - LT230SE,

REPAIRS, Transfer box - Diesel.

+

TRANSFER BOX - LT230SE,

REPAIRS, Transfer box - V8.

3. Remove 9 bolts securing rear extension

housing to gearbox case and remove housing.

4. Remove and discard gasket.

Reassembly

1. Clean rear extension and mating face.
2. Position new gasket to gearbox case.
3. Position rear extension housing and tighten

bolts to 25 Nm (18 lbf.ft).

4. Fit transfer gearbox.

+

TRANSFER BOX - LT230SE,

REPAIRS, Transfer box - Diesel.

+

TRANSFER BOX - LT230SE,

REPAIRS, Transfer box - V8.

5. Fill automatic gearbox with oil.

+

MAINTENANCE, PROCEDURES,

Automatic gearbox.

AUTOMATIC GEARBOX - ZF4HP22 - 24

44-46

REPAIRS

Parking pawl assembly.

$% 44.28.07

Remove

1. Drain automatic gearbox oil.

+

MAINTENANCE, PROCEDURES,

Automatic gearbox.

2. Remove transfer gearbox.

+

TRANSFER BOX - LT230SE,

REPAIRS, Transfer box - Diesel.

+

TRANSFER BOX - LT230SE,

REPAIRS, Transfer box - V8.

3. Remove and discard 9 bolts securing extension

housing to gearbox case.

4. Remove extension housing and discard gasket.

5. Remove Torx screw and discard, lift off parking

pawl guide and guide plate.

6. Remove ratchet, spring and pivot pin.

7. Td5 models: Remove spacer from output

shaft.

8. Remove park lock gear.
9. Remove and discard 'O' ring from output shaft.

M44 1109B

9

7

8