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7.1.2 - Accumulator Non Return Valve ( )

The seats for the valves may eventually a number of ridges worn in to them reducing the length of time they hold pressure for. Jaguar don't sell the valve except as part of the switch housing assembly. These ridges can be removed with wet or dry paper, finishing off with 1200grit.

The alloy block that the Accumulator vessel and charge/ pressure switches screw into has two pipes also screwed into it. The top pipe (from the booster) screws straight into the block. The bottom pipe (from the Valve Block) screws into what looks like a 22mm nut. If this is removed a small spring loaded plunger is revealed. This seats against the inner face of the 22mm nut. It was this inner face that needs cleaned up.

You may need to remove the whole assembly and get the block in a vice as the 22mm is quite tight.


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