landrover Workshop Repair Guides

Land Rover Workshop Service and Repair Manuals

Intermediate reduction drive (IRD) unit - K1.8 > < Intermediate reduction drive (IRD) unit - Td4|Page 494
Page 409
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INTERMEDIATE REDUCTION DRIVE

41-6

REPAIRS

Refit

1. Clean mating faces of IRD and gearbox.
2. Lubricate and fit new 'O' ring
3. With assistance, fit IRD.
4. Fit bolts securing IRD to gearbox and tighten 

sufficiently only to pull mating faces of IRD and 
gearbox together at this stage.

5. Fit IRD support brackets, tighten sufficiently to 

pull mating faces together.

6. Final tighten bolts securing IRD to gearbox to 

90 Nm (66 lbf.ft).

7. Final tighten bolts securing IRD support 

brackets in the following sequence:

l

M8 bolts securing support brackets to IRD 
37 Nm (22 lbf.ft)

l

M10 bolts securing support brackets to IRD 
50 Nm (22 lbf.ft)

l

3 bolts securing support bracket to cylinder 
block 25 Nm (18 lbf.ft)

l

3 bolts securing support bracket to sump at 
45 Nm (33 lbf.ft).

8. Position lower engine steady, 'TOP' mark 

uppermost. Fit bolt but do not tighten at this 
stage.

9. Connect coolant hoses and secure with clips.

10. Connect breather hose to IRD housing.
11. Clean propeller shaft flange and mating face.
12. Fit propeller shaft to IRD flange and align 

marks. Tighten nuts and bolts to 40 Nm (30 
lbf.ft).

13. Inspect drive shaft oil seal, renew if worn or 

damaged.

14. Clean drive shaft and flange splines.
15. Fit new circlip to drive shaft.
16. With assistance, pull hub outwards, align drive 

shaft and fit to IRD taking care not to damage 
oil seal.

17. Fit splash shield and secure with bolts.
18. Fit exhaust front pipe.

 

 + 

 MANIFOLDS & EXHAUST SYSTEMS 

- Td4, REPAIRS, Exhaust pipe - front.

19. Fit rear beam.

 

 + 

 FRONT SUSPENSION, REPAIRS, 

Rear beam.

20. Final tighten bolt securing lower engine steady 

to IRD support bracket to 100 Nm (74 lbf.ft).

21. Remove stand(s) and lower vehicle.
22. Fill IRD to correct level with fluid.

 

 + 

 INTERMEDIATE REDUCTION 

DRIVE, ADJUSTMENTS, Intermediate 
reduction drive (IRD) fluid - drain & refill - 
Non NAS.

23. Fill gearbox with fluid.

 

 + 

 MANUAL GEARBOX - GETRAG, 

ADJUSTMENTS, Gearbox oil - drain and 
refill.
 

 + 

 AUTOMATIC GEARBOX - JATCO, 

ADJUSTMENTS, Gearbox fluid - drain & 
refill.

24. Connect battery earth lead.
25. Refill cooling system.

 

 + 

 COOLING SYSTEM - Td4, 

ADJUSTMENTS, Coolant - drain and refill.

Intermediate reduction drive (IRD) unit - K1.8 > < Intermediate reduction drive (IRD) unit - Td4|Page 494