Discovery 2. Manual — part 155

AUTOMATIC GEARBOX - ZF4HP22 - 24

REPAIRS

44-51

Valve body assembly

$% 44.40.01

Remove

1. Remove gearbox oil filter.

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AUTOMATIC GEARBOX - ZF4HP22

- 24, REPAIRS, Filter - oil.

2. Remove 2 bolts securing speed sensor

harness bracket to valve body.

3. Disconnect multiplug from gearbox housing.
4. Using a 30 mm socket, remove nut securing

multiplug connector block to gearbox housing.

5. Remove 6 long bolts securing valve body to

gearbox.

6. Remove 5 short bolts securing valve body to

gearbox.

AUTOMATIC GEARBOX - ZF4HP22 - 24

44-52

REPAIRS

7. Release speed sensor and remove valve body.
8. Remove and discard 'O' ring from multiplug

connector.

Refit

1. Clean valve body and mating faces.
2. Fit new 'O' ring to multiplug connector block.
3. With assistance, position multiplug to gearbox

housing and tighten nut.

4. Align valve body to gearbox, ensure manual

valve is correctly located. Position speed
sensor retaining bracket, and tighten screws
to 8 Nm (6 lbf.ft).

5. Connect multiplug to gearbox connector.
6. Fit gearbox oil filter.

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AUTOMATIC GEARBOX - ZF4HP22

- 24, REPAIRS, Filter - oil.

AUTOMATIC GEARBOX - ZF4HP22 - 24

REPAIRS

44-53

Seal - valve body

$% 44.20.13

Remove

1. Remove valve body assembly.

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AUTOMATIC GEARBOX - ZF4HP22

- 24, REPAIRS, Valve body assembly.

2. Remove circlips and springs from gearbox

casing noting location of long and short
springs.

3. Using tool LRT-44-005, remove and discard

seals from gearbox casing.

Refit

1. Clean gearbox casing, springs and circlips.

2. Fit new seals using tool LRT-44-005, ensure

seals are fully seated.

3. Position springs in their correct locations and

secure with circlips.

4. Fit valve body assembly.

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AUTOMATIC GEARBOX - ZF4HP22

- 24, REPAIRS, Valve body assembly.

AUTOMATIC GEARBOX - ZF4HP22 - 24

44-54

REPAIRS

Pressure regulator

$% 44.40.22

Remove

1. Remove valve body assembly.

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AUTOMATIC GEARBOX - ZF4HP22

- 24, REPAIRS, Valve body assembly.

2. Release and remove clip securing pressure

regulator solenoid valve harness to valve body.

3. Disconnect multiplug from pressure regulator

solenoid valve.

4. Remove 5 Torx screws securing pressure

regulator to valve body and remove pressure
regulator.

Refit

1. Clean pressure regulator and mating face with

a lint free cloth.

2. Position pressure regulator to valve body, fit

Torx screws and tighten to 8 Nm (6 lbf.ft).

3. Connect multiplug to pressure regulator

solenoid valve, fit clip and secure harness to
valve body.

4. Fit valve body assembly.

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AUTOMATIC GEARBOX - ZF4HP22

- 24, REPAIRS, Valve body assembly.

M44 1351

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