Defender. Manual — part 43
![](/vehicles/onond/qug/lecmbuttig/jantse.png)
1. To install, reverse the removal procedure.
Tighten to 14 Nm (10 lb.ft).
2. Tighten to 26 Nm (19 lb.ft).
3. Connect the battery ground cable.
For additional information, refer to:
Battery Connect
(414-01
Battery, Mounting and Cables, General Procedures).
![](/vehicles/onond/qug/lecmbuttig/florevs.png)
Power Brake Actuation - Brake Booster Non-Return Valve
Removal and Installation
Removal
1. Disconnect brake vacuum hose from booster non return
valve.
2. Carefully prise valve out with a screwdriver blade between
valve and grommet. Take care not to exert too much
pressure on the vacuum chamber.
3. Remove rubber grommet but be careful not to allow it to fall
into the vacuum chamber.
4. Check the valve for correct operation; it should not be
possible to pass air through into the booster in direction of
arrow. Do not use compressed air.
Installation
1. Install rubber grommet.
2. Smear ribs of the valve with Lucas Girling rubber grease to
assist assembly, and push valve fully home.
3. Connect vacuum hose to the valve.
4. Road test vehicle.
![](/vehicles/onond/qug/lecmbuttig/llen.png)
Power Brake Actuation - Brake Vacuum Pump
Removal and Installation
Removal
1. Remove the cooling fan upper shroud.
Release the 6 screws.
2. NOTE: Cooling fan shown removed for clarity.
Release the tension from the accessory drive belt.
Rotate the accessory drive belt tensioner clockwise.
Displace the accessory drive belt from the brake
vacuum pump pully.
3. Disconnect the brake vacuum pump vacuum pipe.
4. CAUTIONS:
Make sure that all openings are sealed. Use new
blanking caps.
Note position of fixing bolts for installation.
Remove the brake vacuum pump.
Remove the 3 bolts.
Remove and discard the gasket.
![](/vehicles/onond/qug/lecmbuttig/rure.png)
Installation
1.
CAUTION: Install fixing bolts to previously noted
positions.
• NOTE: Remove and discard the blanking caps.
• NOTE: Clean the component mating faces.
• NOTE: Install a new gasket.
Install the brake vacuum pump.
Tighten to 23 Nm (17 lb.ft).
2. Connect the brake vacuum pump vacuum pipe.
3. NOTE: Cooling fan shown removed for clarity.
Install the accessory drive belt.
Rotate the accessory drive belt tensioner clockwise.
4. Install the cooling fan upper shroud.
Secure the 6 screws.
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