Compressor Removal/Renewal - Aston Martin DB7 Workshop Manual

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Air Conditioning Repair Procedures
Compressor Removal
8.1.01.1 Compressor Removal/Renewal
Procedure
1. Open the bonnet and fit a wing cover.
2. Depressurise the air conditioning system.
3.
6.
7.
8.
9.
Disconnect the low and high pressure hoses from
the rear of the compressor. Plug the hose ends to
prevent the ingress of dirt.
Remove the compressor pivot bolt securing nut.
Carefully separate the muffler from the compressor
and remove and discard the ' O ' ring seal.
Fit a blanking plug to the muffler and a blanking
plate to the compressor, fit and tighten the bolt that
secures blanking plate.
Raise the vehicle to working height on a ramp.
Figure 7.
10. Slacken the compressor drive belt adjuster rod and
adjuster plate securing nuts and bolts (Fig. 1 -4, 5, 6
and 7)
11. Slacken adjuster nut (Fig. 1 -10).
12. Remove the nut and bolt (Fig. 1-4 and 5) from
adjuster plate (Fig. 1-3).
13. Slacken trunnion nut and bolt (Fig. 1 -9 and 2) and
remove the adjuster rod (Fig. 1-1).
14. Disconnect the compressor multi-plug.
1 5. Remove the compressor drive belt.
16. Pivot the compressor away from engine, support
the compressor and remove the top pivot bolt and
lift the compressor clear of the vehicle.
17. Removethemountingbracketsfromthecompressor.
26. Lift the compressor up to the engine and fit the top
pivot bolt (Fig. 1 -2) from above.
27. Attach adjustment rod loosely to the compressor
(Fig. 1 -1) with nut and bolt (Fig. 1 -6 and 7).
28. Loosely attach adjustment plate (Fig. 1-3) to the
compressor with nut and bolt (Fig. 1 -4 and 5).
29. Fit bolt (Fig. 1 -2) through trunnion (Fig. 1 -8) and fit
nut (Fig. 1-9) to the bolt.
30. Fit the drive belt over the pulley, move the
compressor away from the engine to tension the
drive belt and lightly tighten the bolts and nuts.
3 1 . To obtain the correct tension on the drive belt
tighten adjuster nuts (Fig. 1 -10). The belt is correctly
tensioned when a load of 59- 63.6 kg (130 -140 lb)
applied at the centre deflects the belt 4 mm.
32. Ensure that all securing bolts and nuts are fully
tightened.
33. Lowerthe vehicle to the ground.
34. Remove the blanking plate and the blanking plugs
from the compressor.
36. Fit new ' O ' ring seals to the low and high pressure
hoses and connect them to the compressor. Fit the
retaining plate, fit and tighten the screw.
38. Charge the air conditioning system.
39. Remove the wing cover and close the bonnet.
May 1996
8-51