FSM Camsaft Timing Gear Removal

Anonymous-0

Well-known Member
Hey all, I started dismantling the engine of my '64 FSM diesel today and I can't get the camshaft timing gear off. I using a puller that has 3 bolts screwed into the gear's holes. I tried heating it but haven't gotten anywhere.

Can anyone offer some suggestions. I am I missing something or doing it the wrong way.

Thanks in advance.
 
Be careful with those gears, they are fragile and were a source of failure. You should have the new style with a single bolt and a keyway. You must be cocking the gear a little. Maybe using a lead hammer and tapping it while the puller is fairly tight will shock it loose. Possibly, someone else has been in there before and "fixed it" real good with some locktite or center-punched the shaft (to thicken it up).
 
The tractor is a '64 but the engine is a '57 or '58. The number 3 c-rod went out the side of the original block. So it is a older 3 hole pulley. I tried hitting the center bolt of the puller (a trick that usually works) but it wouldn't budge. I'll try hitting the pulley tomorrow with a dead blow hammer, with the puller tightened up and see if that work. I did strip the original motor so i have the new style pulley to put on after the re-build.
 
You mean gear, not pulley. Don't use excessive force. You can break out the spokes or hub of the gear. And you don't want to distort the teeth, or they'll make noise and damage the mating gear as well. I found mine was broken, but the hub slid off the camshaft and dowel pin fairly easily.

The older style gear and newer one don't interchange. You need the whole cam shaft as well. And then, there is possibly something about the thrust washer and front plate to worry about. The newer gears are wider as well. They also made service replacement gears with the 3 holes, but thicker. This indicates a problem area.
 
I put my cam in the shop press and supported the gear around the cam and pushed it off , do not press with gear just laying on something flat you will brake center of gear. i use a short peace of pipe that just would go over the cam for a support. you could take the cam to a machine shop and let them do the work, that might be the cheapest and best way to go
 

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