Posted by pete 23 on August 06, 2012 at 11:00:47 from (74.32.238.2):
In Reply to: Re: 826D posted by Brad Motheral on August 06, 2012 at 05:43:11:
Not unusual to put that much in one of those Bosch rotary injection pumps as the parts are really difficult to come up with and spendy. I have an old pump head I replaced years ago I just keep for a souvenir , paper weight. Reason I replaced it was due to irregular governor action. They have a steel ball check valve that is, or at least was at that time not a service item, and it was leaking causing erratic governor action. It is a hydraulic governor that uses helix on throttle valve to control rate of leak off of control pressure fuel and if that check valve leaks it allows too much fuel to leak back and then engine speed changes so has to correct itself. Really a weird setup but it does work. Later on, they went to a mechanical governor, more conventional but I never needed to get inside of one of them.
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