Posted by Dieseltech on October 03, 2015 at 20:38:06 from (199.16.223.2):
In Reply to: Re: Bosh VE pumps posted by t in ne on October 03, 2015 at 19:36:34:
VP44 is electronic controlled, VE is mechanical governed pump which replaced the hydraulic governed VA pump. When I was at the Bosch VA class years ago everyone thought the fellow that designed the VA probably ended up in a rubber room somewhere. I'm sure when the class ended we knew how to repair them, but with all the passageways trying to remember what each did was next to impossible. There are two rotary valves, the throttle and spill that turn, plus the spill also moves in and out depending on load. They can be resealed if they work but leak, IF junior hasn't torn it apart first, usually breaking parts no longer available. The first VE pump started on the VW Rabbit, then later on the first gen Dodge/Cummins. The basic VE works great, the late ones on Iveco I've seen more issues with. When first starting up a repaired Iveco pump on the test stand it will send chills down your spine. Even with the supply pump on for several minutes the advance will rattle loud until the air gets out with the stand turning 100 RPM.
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