Posted by Dieseltech on October 03, 2015 at 18:33:45 from (199.16.223.2):
In Reply to: Bosh VE pumps posted by animal on October 03, 2015 at 06:17:34:
Bosch VE rotary pumps are fine when built in the BASIC form, and there are some that don't even use a feed pump, such as some VW and IH applications. From what I've seen when repairing the newer pumps it's the added emissions parts that fail first, sometimes wrecking the rest of the pump internally. The models with the cold advance that have the two small steel lines to the cold advance piston fail the most it seems. There's a small C clip inside that will break sometimes then trashes the main advance piston by cracking it, ruins the camplate lobes and rollers, transfer pump liner, and main housing. One time had a pump so bad the repair cost a bit more than a new pump but no one had a new one anywhere. Yet the cold advance system on the Dodge Cummins seldom caused any trouble. And yes, air in fuel will cause the clip to break, either running out of fuel by habit or trying to run choked filters too long. When the advance piston hammers back and forth when fuel cushion is lost, I've seen clips break. Even when I got a pump in with a good clip it still gets replaced. The VE on the Case 590 usually never comes off unless it's for leak issues, most have 4000 plus hours, and only option added may be the fuel cutback aneroid..
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