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Tractor Talk Discussion Board

Re: Case 188d questions/how it fires


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Posted by RBoots on April 27, 2017 at 16:21:34 from (173.241.113.102):

In Reply to: Case 188d questions/how it fires posted by abertarelli on April 27, 2017 at 16:04:24:

Make sure you have #1, the front cylinder at
top dead center. Not sure if a Case has
timing marks, but it must have if it's a
diesel, line up the marks to where it is
showing #1 @ TDC or whatever the specified
degrees for a Case engine timing is. Then,
after you have that lined up to where it
needs to be, you will have a couple things
to check. If it is truly in the correct
place on #1, both pushrods to #1 will be
loose where they will spin easily between
your fingers, and, after removing the little
2 screw cover on the side of the injection
pump, both lines on the pump drive and
governor should be lined up perfectly. If
so, it SHOULD run, unless you have something
else screwed up. Diesels like that don't
have spark or electronics on the fuel
system, the fuel is sprayed into a fine mist
by the injector after it is pressurized by
the injection pump, and the fuel is ignited
by the compression pressure inside the
cylinder. That is why diesels have much
higher compression than a gas engine. Think
air compressor, the compressor itself gets
hot, because compressing the air makes it
hot, thats how a diesel engine makes its
heat to ignite the fuel. Couple things to
check, did you get all the timing marks
lined up on the gear train (if you had the
front cover and gears apart)? Another, if
you had the pump off the pump driveshaft,
did you line up the dots on the one side of
the tang on the pump drive shaft with the
slot on the pump shaft itself?

Ross


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