Aston Martin DB7 - Expansion Valve Renewal

Air Conditioning Repair Procedures
Expansion Valve Renewal
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Figure 2.
11. Position valve plate and gaskets (Fig. 2-1 and 2) on
the compressor and fit the cylinder head.
12. Tighten the cylinder head securing bolts in the
order shown in Fig. 3.
Figure 3.
13. Fit new 'O' rings to the outlet port blanking plate,
position the plate on the compressor and fit and
tighten the securing bolt.
14. Check compressor oil and top up in necessary.
14. Refit the compressor.
15. Remove the wing mat and close the bonnet.
8.1.05.1 Expansion Valve Renewal
1. Depressurise the air conditioning system.
2. Undo the pipe to expansion valve clamp bolt and
retaining plate and disconnect the pipes (Fig. 1)
Figure 1.
3. Fit blanking plugs to the expansion valve and to the
pipes.
4. Reposition the pipes to one side.
5. Unscrew the two torx head retaining screws and
remove the expansion valve from the air
conditioning unit (Fig. 1 -1).
6. Remove and discard the 'O' rings.
7. Fitting a new valve is the reversal of the removal
procedure.
8. Ensure new 'O' rings to all union connections are
fitted.
9. Evacuate the system.
10. Recharge the system.
8-54
May 1996