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Tractor Talk Discussion Board

Re: 4-53 detroit rpm loss


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Posted by Fritz Maurer on May 02, 2022 at 06:45:58 from (174.207.38.195):

In Reply to: Re: 4-53 detroit rpm loss posted by Crane guy on May 01, 2022 at 21:52:05:

Possibly a cracked nozzle retainer nut... if you have
foam at all the injectors either compression is being
blown into the inlet rail, or you are still missing a
vacuum leak between tank and pump. Bad injectors
like that are rare, plus you said it was running
poorly before all this work... I am hesitant to blame
this on the injectors. Hook up a temporary fuel
system directly to the suction side of the pump.
Bypass everything, including the tank. If you still
have foam, it is the pump or bad injector. No foam,
there is still an air leak between pump and tank.
Sometimes, it helps to put another pair of eyeballs
on the project... when these projects drag on for
days you get frustrated and start going blind to little
details. Went to a friends house last week where he
had been trying to start a IHC 9.0 for two days after
eliminating the water separator, which had failed (
(1987 school bus). Now a 9.0 is about the easiest
engine to bleed, ever. Operating the hand pump,
absolutely nothing. Started checking over his work
and found he had neglected to tighten the Union of
the two lines where he removed the water
separator. Just silly stupid mistakes you can make
when you start getting disgusted.


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