Super h timing gears/ chain

Working with my nephew on a super H. I don't have
an I&T book for it, & haven't had one apart before/

The tractor ran perfectly, but when shut off, it
run backwards four or five revolutions before stopping.
Last time it did this, it stopped ---locked up.

Does anyone know if the Super H had timing gears or a
roller chain for running the dist shaft.
I took the oil filler cap off & it looks like there is
a wadded up roller chain.
Jim
 
The backwards rotation may have sucked a piece of rust or deposit backward into a cylinder. When doing that reverse rotation it sucks in air from the muffler, and pushes air out the carb/air cleaner. Junk can wedge between the piston and the under side of the head in squish areas. It is also possible for the timing gear to come loose form the cam shaft. It is held on by a right hand threaded nut. (later 3XX series I think) had a left hand thread. But that was to prevent it from loosening when running forward, normal. Don't force the engine, it can really break things. We have a 400 Farmall that did that consistently for years. Idling it down to the point it was maybe 450 rpm at idle, and letting it cool off for 5 minutes after a work day helped. Also putting it in 5th and holding the brakes, then shutting it off and letting the clutch out simultaneously just eliminated the issue. (My uncles method of choice. No issues happened from it however. Jim
 
Steel timing gears. About the only way they can fail is if the tractor has a live pump and is overloaded. This can break the hub on the cam gear. The engine may not then run but it will still rotate freely.

Suggest first check that the starter drive (bendix) has not jammed into the flywheel - it's is a common problem on these engines as the starter drive/ring gear wear.

If that starter is jammed, rotating the crankshaft BACKWARD a few degrees will free it. If the tractor is on hard ground put it in 5th gear then rock it back and forth until the fan moves a bit.

--or--

Loosen the bolts holding the starter to the bell housing several turns. Then pull the starter away from the bellhousing. If you hear a "clunk" when the starter moves you have freed it up.
 
Thanks much for the help, guys.
It was used on the auger, so was not run
hard to get really hot, & usually not
shut off between loads.

We did the starter check the first thing
& that was not the problem.

Just wondering what the roller chain
looking thing is in the bottom of the oil
fill.
Jim
 
Forgot to ask another question.
Any tips on getting the radiator hold down
bolts/ studs out/ loose? Appears to have
cotter keys on the studs. Have to get a
better light & a mirror to check.
Jim
 
Don't know, what you see may be the steel plate with holes to keep bigger objects from going down the hole. It maybe has a bunch of around 3/16 diameter hoes in it. Probably mounted vertical in that cover.
 
Dumb-de-dumb dum. Yes, looked with a brighter light this morning
& that's what it is--screen.
Guess I was used to the Ms with the flat screen.
Thanks, D
Jim
 
What you see in the oil fill hole is probably the round screen that D Slater is talking about, number 66 in the linked diagram. Maybe a dumb question, but have you tried it with the clutch pushed down? If not is the problem in the transmission?
H engine diagram
 
Hi, John
Yes, on the clutch thing.
Definitely something ahead of the tranny.
As others have said---timing gears or
something in the cylinder area.
Jim
 

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