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Old 10-20-2000, 07:21 PM
be459 be459 is offline
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Join Date: Jun 1999
Location: Los Angeles, Calif, USA
Posts: 521
(1) For 85 300D, it is just a matter of replacing the o-ring, valves, and gaskets if other parts (check the engine side and the old pump) are still okay . The diaphragm is for older diesels, not the 85 model. The valve consists of a plastic case with a rubber disk. It can go bad.

(2) The reason you want to rotate the engine, I think, is to make the installation easier. If it is under tension, it is hard to line up the screw holes and to seat the pump properly.

(3) You need a 4 to 5 inch allen wrench. The "T" handle allen should work if the length is not too long.

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