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THIOKOL/LMC/DMC Technical Issues Forum Technical repair issues & questions for Thiokol/DMC/LMC

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  #21  
Old 05-15-2007, 09:54 AM
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Default Re: Thiokol IMP : a pain in the rear (differential)

Tim, if you decide to keep that oc-4 and go with a ring gear, I think you can have just about anything custom made for much less than that. It just seem to me that all this Snow Cat stuff is over priced because of lack of new supply of parts. Try calling Tim from Remote Access, he might have a few spares around for you also.

I really like that unit, I seen it on ebay and thought it had a sweet fab job on the full cab. A new paint job would do it some justice. I have schematics of the OC-4 if you decide to do the work yourself. I went through mine recently and had no issues working on it.
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  #22  
Old 05-15-2007, 10:33 AM
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Default Re: Thiokol IMP : a pain in the rear (differential)

Quote:
Originally Posted by timh View Post
i dont know if anyone is interested but the story continues-- a new ring gear and pinion runs about 2200$ plus 500 to put in. a rebuilt oc4 runs about 6500 plus labor. a local rebuilder say that often a ring gear tooth breaks from popping the clutch and because it happens so often they are hard to find
Insane. I also believe that this whole shortage of parts issue is folks being opportunistic. Yes, there is a shortage but if you compare similar shortages to vintage cars, etc... they are no where near as nasty (not in all instances but many). I think a piece can be customized more reasonably than those prices.

There was a guy that bought a Thiokol 4T10 then replaced the twin drive shaft with a Bombardier differential. I believe it was the 'Snow Toaster' rebuild. So, obviously customization was required however if a person can find a whole diff from a newer machine or find a 'deal' then it may be possible to do something completely different and end up with a more reliable system for either less or maybe the same money. At least it may be more robust than something that is so sensitive that popping the clutch creates internal chaos and destruction.

Just food for thought.
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  #23  
Old 05-15-2007, 11:57 AM
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Default Re: Thiokol IMP : a pain in the rear (differential)

New here to the snowcat world with a 67 1200A with a C-4. Looking for parts and manuals for the rebuild of the century, I found Landis Zimmerman in PA with Zimmerman Oliver and Cletrac that is still offering manuals, parts and repair service. Landis can be contacted at (717)738-2573 or http://www.olivercletrac.com/contact.html. His quoted price today for a R/P is $1550.

Does anyone have a source for the (2) bearing spacers on the main drive axle. The first rides between the axle O/B bearing and the 36 tooth gear and the second rides the spine side thats against the drop box bearing?
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  #24  
Old 05-15-2007, 01:03 PM
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Default Re: Thiokol IMP : a pain in the rear (differential)

yea cant afford to fix it cant afford non to fix it. im still looking for a less expensive part but no luck yet. i just talked to the person who rebuilt the cab and he didnt mess with the differential so the people before him were the culprits. so looking for ring gear and pinion. imps around utah are going for 8k for iffy cat to 16 for re worked.
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  #25  
Old 05-15-2007, 02:42 PM
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Default Re: Thiokol IMP : a pain in the rear (differential)

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Originally Posted by wannagoflying View Post
I found Landis Zimmerman in PA with Zimmerman Oliver and Cletrac that is still offering manuals, parts and repair service. Landis can be contacted at (717)738-2573 or http://www.olivercletrac.com/contact.html. His quoted price today for a R/P is $1550.
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  #26  
Old 05-15-2007, 04:01 PM
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Default Re: Thiokol IMP : a pain in the rear (differential)

I've been away from the forum for a while and came across this topic. What a shame that there are such dishonest people!
The thing you must be careful about on the Clark -4 or any differential for that matter, is what damage did the missing tooth do. Steve, at Peterson's told me that the tooth will almost always go through the gears and cause the case to get cracked. Usually the problem is much greater than just a broken gear.
If it were mine, I would take it to Peterson's (removed from the chassis to save $$$) and have them take a good look at it. Have it rebuilt the right way by real experienced mechanics, then take good care of it. I know it will cost some cash, but it will increase the value too.

I went through this with my 1402 last winter. Someone tried to piece it together with "repaired" parts. I went as far as having to get a new case.
But today I have a very nice cat, that is very dependable.

Steve said that Peterson's have looked at some Imps to buy for resale, but have stayed away from some due to the risk of a problem in the rear end. After my experiences, I would not give top dollar for one unless it has been closely checked out or recently rebuilt. If that's not the case then you have to steal it to cover your risk.

Last edited by nutsster; 05-15-2007 at 04:03 PM. Reason: correct error
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  #27  
Old 05-15-2007, 11:13 PM
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Default Re: Thiokol IMP : a pain in the rear (differential)

Ive been talking on the phone with some of you about this OC-4 or S70F-12 if you prefer and knew from years ago there was a connection with it and the Oliver Cletrac HG, OC-3 and OC-4 crawlers. I'de seen the parts and was sure that they were the same. I didn't check any further 'cause I moved over to the OC-12 and the M-29.

So I'm searching today and found Zimmerman Oliver Cletrac in Ephrata PA www.olivercletrac.com 717-738-2573 and rushed over here to tell you guys and your already ahead of me. I think you might have found your alternate source. I hope they fit 'cause lots of old Sprytes and Imps need spares. I'm a rebuilder and the high price of parts is always difficult to overcome. Good work.

This is an interesting link. Check the forum, at least one of our friends is there :)

http://www.cletrac.org/

Pat Foster
Wallace Idaho

Last edited by Snowcat Pat; 05-15-2007 at 11:27 PM. Reason: more info
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  #28  
Old 05-16-2007, 07:53 AM
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Default Re: Thiokol IMP : a pain in the rear (differential)

Quote:
Originally Posted by timh View Post
yea cant afford to fix it cant afford non to fix it. im still looking for a less expensive part but no luck yet. i just talked to the person who rebuilt the cab and he didnt mess with the differential so the people before him were the culprits. so looking for ring gear and pinion. imps around utah are going for 8k for iffy cat to 16 for re worked.
If you wish to change to the OC12 with the final drives we have several of them here and could offer you a good price.

Sorry about your differential

Brad @ Minnesota Outdoors
www.mn-outdoors.com
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  #29  
Old 05-16-2007, 11:29 AM
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Default Re: Thiokol IMP : a pain in the rear (differential)

Brad in general what do the OC-12 go for?
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  #30  
Old 05-16-2007, 11:59 AM
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Default Re: Thiokol IMP : a pain in the rear (differential)

does anyone know how difficult it is to change from an oc4 to a 12? and will the 4cylinder have enough ponies to handle it?
timh
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  #31  
Old 05-16-2007, 12:55 PM
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Default Re: Thiokol IMP : a pain in the rear (differential)

You bet the 4 cylinder can handle it. Gearing is everything!
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  #32  
Old 05-16-2007, 02:18 PM
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Default Re: Thiokol IMP : a pain in the rear (differential)

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Originally Posted by Snowcat Operations View Post
Brad in general what do the OC-12 go for?
Mike we have been selling the OC12 with the finals for 3950.00 gone threw with new steering bands.
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  #33  
Old 05-16-2007, 03:23 PM
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Default Re: Thiokol IMP : a pain in the rear (differential)

the oc12 will change my gearing from 12 speeds to 4 so would i need to or be wise(something im not know for so far) to put a different trany on the engine also?? i know i ask alot of questions but i paid for not asking enough already.
thanks
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  #34  
Old 05-16-2007, 10:54 PM
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Default Re: Thiokol IMP : a pain in the rear (differential)

Does anyone know if the OC12 is in any way shiftable?( like maybe it is a shifting transaxle like the OC4 but the factory fixed it in a gear so it would not shift).
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  #35  
Old 05-19-2007, 08:17 PM
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Default Re: Thiokol IMP : a pain in the rear (differential)

Bulldog1401, there is not a trans section in the OC-12 case like there is in a OC-4 if that is what you mean. Just the pinion housing.

Pat Foster
Wallace Idaho
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  #36  
Old 05-20-2007, 01:02 AM
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Default Re: Thiokol IMP : a pain in the rear (differential)

there is another company in California called drilling and trenching supply they have new ring and pinons for oc4 i think there is a link on team Richards sight
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  #37  
Old 05-20-2007, 01:07 AM
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Default Re: Thiokol IMP : a pain in the rear (differential)

in order to put an oc12 differential in a imp you have to widen the under carriage seems to me that it would be a lot cheaper just to rebuild the differential that is in the cat now
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  #38  
Old 05-20-2007, 09:11 AM
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Default Re: Thiokol IMP : a pain in the rear (differential)

Quote:
Originally Posted by mkntrakes View Post
there is another company in California called drilling and trenching supply they have new ring and pinons for oc4 i think there is a link on team Richards sight
Is this the company mkntrakes?

Drilling & Trenching Supply
1940 Fairway Dr Ste J
San Leandro, CA , 94577-5639
Phone: 510-895-1650
FAX: 510-895-8129
Toll Free Phone: 800-331-9988
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  #39  
Old 05-20-2007, 11:07 PM
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Default Re: Thiokol IMP : a pain in the rear (differential)

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Originally Posted by mtntopper View Post
Is this the company mkntrakes?

Drilling & Trenching Supply
1940 Fairway Dr Ste J
San Leandro, CA , 94577-5639
Phone: 510-895-1650
FAX: 510-895-8129
Toll Free Phone: 800-331-9988
that the one he also sells parts to the cletrac guys he has the ring and pinon made new
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  #40  
Old 05-24-2007, 09:46 PM
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Default Re: Thiokol IMP : a pain in the rear (differential)

Yeah, Snow cat Pat, that was what I was getting at. What is the difference between the 1401, 1402, ETC...?
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