terratrac,dozer,parts or info

madrad

New User
I am helping a friend of mine work on what I believe to be an American tractor company/case-terratrac dozer,it is a small machine.i am having trouble finding information[model#,year,repair info,ect.] at this time we are trying to repair a badly worn drive sprocket[missing teeth,over all wear and tear]. I cant find a model # stamped any place on the frame to begin gathering info,can any one help?
 
there should be a plate on the side of armrest-tool box can't remember which side at least that's where it is on my 320.
 
First of all what engine is in the machine? Next some of those models take the same sprockets as a Cletrac/Oliver Hg, OC-3 or 4. The final drives were built by Clark
 

If it is a terratrac and not a case , the model

and serial number will be stamped in the top of

the frame rail by the starter.

There is a group on yahoo --case terratrac ,

come join the group.

george
 
thanks a lot fellas,that gives me enough to get started.just for giggles,the sprocket I,m working on is missing five teeth,the teeth that are still there are badly worn.it throws the trac constantly.ive been welding my brains out trying to build them back up.i figured I might be better off finding a sprocket in better shape to start with,or get a loan for that much welding rod.see you on yahoo.
 
I remember seeing a fella in south jersey many years ago repairing the teeth with triple x pipe.
he would cut pieces to width of the teeth and then cut those pieces in half lay them back to back and build up with weld of course you have to take into account the wear on the tracks them selves al
 
madrad, If all else fails, you could try Zimmerman @ 717-738-2573, a good guy to do business with,very helpful. He handles all Oliver dozer parts and could tell you the size and sprocket if they would cross over to your machine. Other wise the fellow who suggested cutting pipe in half would work, we seen that also. If not pipe how about the top link bushings cut in half and welded in if the size is right.Really good information in all of these replies.Hope you find one that works for you.
LOU
 
If you find the model number and it is a GT25 or GT30 the sprockets should interchange with either Clark CA-1 or US Trac. Believe that Crawler Haven was scrapping/parting some of the small Terratracs a year or so ago, don't know if they're still in business. Wengers in Pa. may help; might also try Ray at link below.
Syltech
 
If your sprockets are as bad as you say your chains are shot too. When the internal wear on the pins and bushings in the links gets too great the pitch becomes greater than the sprocket was designed for and wear increases. Chains eat sprockets sprockets dont eat chains.

There used to be a company that sold weld in sprocket inserts. I used to think of it as a patch up job it being better to weld on new rings. I think if the welded in bushings were thick enough it might increase the diameter of the sprocket enough to compensate for the incresed pitch in the chains. At least you might get some more life out of it.

Usually by the time this happens the rails are so thin the rock guards are wearing in the pads and the pins are taking out the roller flanges. Good to keep an eye out for a parts machine with good undercarriage
 
I have had many OC-3's and also Case 310 & Terratrac crawlers. I never saw any that the sprockets would interchange. The only thing those machines shared was the transmission as it was built by Clark. The finals were totally different with the Case/ Terratrac design where the sprocket was mounted splined output shaft and held on with a large nut. The Oliver OC-3 design used a bolt on sprocket that fit on studs on the bull gear hub. Totally different...
 

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