Re: Case 1740 starting issue

Posted by used red MN on February 23, 2022 at 06:42:41 from (146.209.159.16):

In Reply to: Case 1740 starting issue posted by RobT05 on February 23, 2022 at 00:08:11:

Unfortunately, it sounds like the starter is having a
problem again. Sometimes those Delco starters will
break the stop collar and/or the snap ring will come out
of place on the end of the shaft that hold the drive in
place. This will go unnoticed until the engine it is on
does not start. Then this condition causes the problem
of the starter staying engaged. This is due to the
internal mechanical connection to the solenoid inside
the stater by a ..clutch fork.. setup. The starter drive
mounts on twisted splines that force the drive to
engage in the flywheel. If that stop collar or ring is out
of place the twisted splines push the drive to far out of
position and through the ..fork.. and mechanism inside
hold the solenoid in the ..closed contact.. position and
it keeps cranking. When the engine would start the
flywheel spins faster so the twisted spline help the
drive withdraw from the flywheel and the internal
spring over comes the force and separates the
contacts so the starter stops spinning. The start aid
that Case collector mentioned is an important part of
the puzzle. That needs to be operated in cold weather.
Also mentioned fuel in the oil causing it to overfill is
another issue that was mentioned that could cause the
smoking. I would also suggest to see if a mouse or bird
has made a nest in your air intake for the engine, that
will cause smoke and no power. May also check the
electric solenoid is working that pulls the lever on the
injection pump to give it fuel to run or stop the engine
when denergized. If it has a knob to pull to shut it off it
will not have a solenoid but it is important to make sure
the lever the cable is pulling on the injection pump is
completely returning to the stop in the released
position. I am attaching a video that may help explain
what I am talking about in the starter. The video is of a
large diesel starter such as a semi truck would have,
but the principle is the same. The video is talking about another feature but the two terminals on the left are the ones that are contacted by the washer are what is essentially the switch to turn the starter motor on and off. That is what I am talking about being mechanically held in the on position.

• Video

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