Super A Camgear Replacement

majikfish · Jun 29, 2015

Hello. I bought a Super A that ran strong for a few weeks, then wouldn't start. I had an old ace troubleshooter look it over, and we determined the governor gear wasn't turning. I pulled the housing and discovered a third of the gear teeth had sheared off. Upon further inspection, I determined the camgear was compromised. I paid good money for this tractor. Any tips on getting at the camgear? I understand I have to pull the camshaft, and that it is also necessary to turn the engine so the tappets will be accessible by use of gravity? Could anyone confirm this?

Best advice: should I pull the engine and take it to a shop? I don't have an engine boom. Also, can someone confirm whether or not the stop in the stem of the governor sits on top of the pin, or is it part of the pin? Thanks.

The fellow I bought the tractor from advised he "replaced the block". I don't see how he could have done that without knowing the governor and cam gears were bad. Unless all he did was replace the sleeves and pistons...

gene bender · Jun 29, 2015

That happened while you had the tractor cause with teeth gone it wont fire and run. Must have backfired or something to shear teeth. Its hard to pull the cam with engine in the tractor but if you remove the rocker assy and pan you could reach up and push all the tappets up as far as they will go. They should then stay up thus allowing the cam to be removed. You will need to remove the front covers bolts thus allowing it to be turned enough so you can see the timing dots as they need to be lined up. You need a manual so you can install the cam correct. Are the gov gears teeth OK or does it also need to be replaced. I have the parts if needed.

Tom Fleming · Jun 29, 2015

in addition to what Gene has posted, my advice is to remove the front end and front cover. While you might be able to finagle without doing that, you may not have any hair left after the project...........or what you do have will go completely gray.

My opinion, but I would pull the front end and the front cover. Pieces left in there from the disintegrated gear will NOT be good. I would also pull the pan and make sure there is nothing in there.............

Lastly, these types of things can and DO happen. It is the nature of the beast...............old tractors.

PS: Gene has done MANY more of these than I have, so he is the expert. I just know how cantankerous these things can be if you don't have full access to move things around.

Dennis K (WA) · Jun 29, 2015

If teeth are missing on your cam gear, you need to check your valve train closely, ie, push rods, rocker assy and valves for any possible damage.
Good luck with your project, it happens unfortunately.
Dennis

gene bender · Jun 30, 2015

With teeth gone the cam did not turn and anyhow that engine the valves cannot hit the piston so nothing happened to the valves or pistons.

Super A Camgear Replacement

majikfish

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gene bender

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Tom Fleming

Well-known Member

Dennis K (WA)

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gene bender

Well-known Member

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