Posted by jaluhn on January 01, 2013 at 20:10:16 from (198.228.217.147):
In Reply to: 3500 Fuel Issue posted by jaluhn on December 31, 2012 at 18:22:33:
Agreed. Know where I can find a Simms pump manual? The manual set I have the Ford 3400, 3500, 4400, 4500, 5500 & 5550 reprint manual set off this site and has no info about injection pump work beyond R&R. It does have injector rebuild info. I have found a Dexta service manual that has good info on a very similar Simms pump.
For what they do, injection pump are actually pretty simple pieces of gear. There's really nothing much different in working on the injection pump and rebuilding an engine, just much finer tolerances and more adjustments. The tricky part is replacing parts and the calibration, but most of the adjustments you don't have to mess with. I've had good luck working on Bosch VE type pumps this is just by first inline.
IMHO injection systems are much less sensitive than the common perception. Look at how much people run waste motor oil and veggie oil in diesels.
I used to be scared to mess with injection systems at all, but once I finally got into them it turns out that things aren't as scary as they seem. The big issue is of course that it's very easy to make a mistake that bites you in the rear later. On the other hand, for a low use ranch tractor that doesn't get run hard you can get away with things not quite being perfect, and it's also hard to justify throwing the kind of money around to get it properly done.
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