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THIOKOL/LMC/DMC Technical Issues Forum Technical repair issues & questions for Thiokol/DMC/LMC |
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#41
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THOMAS,
Did you find a replacement OC12 yet? I may have one for you if you havent. Sorry but I just read this post.
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EVIL prevails when good men stand aside. |
#42
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so what do you have?
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lmc 1200 x4 lmc 1500 ,moorka, 1404 imp |
#43
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OC12. No drop down boxes with the 6.14 ( I may be wrong on the gear ration but its the lowest gear).
__________________
EVIL prevails when good men stand aside. |
#44
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Great thread,
I have the dreaded C-4 rear in my Ractrac Sprite (=Thiokol Spryte). The previous owner told he replaced the gearbox some time ago. Its fully working, and so far no probs - although I'm trusting his words because I've yet to drive it myself... Could someone tell me what are the weak points of these C-4 rears? Maybe I could fix the probs before they occur, I have full CNC-machining facilities so I'm not afraid of some work. Still, I would really like an C-12 which I haven't been able to find from here... ![]() I'd really like to fit hydraulics and snow plow but with C-4 it seems stupid thing to do ![]() |
#45
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Yes. A snow plow is a bad idea with a c-4 equipped Spryte. Unfortunately theres nothing much you can really do to improve it. There are several OC12s floating around. They run from about $2,000 for a very good used one to $6,000 for a new one that has never been used. I can get both.
__________________
EVIL prevails when good men stand aside. |
#46
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The biggest problem is getting the thing here, it might even double the price (first land transport inside US, the shipping in a container to Europe, land transport in Europe, then EC Tax 10% and on top of everything Value Added Tax 19%...). I'm not sure if the maker of my "Thiokol copy" ever used OC12 rear, if they did - then I have a chance of finding one from here - but to be honest, these parts don't grow in trees here.
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#47
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#48
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Hi. I'm totally new to the super cool world of Snow Cats, but I have a differential question. From looking at pictures of the OC-12 (and making the assumption that most are of similar operating principle), they look like regular open differentials with band brakes on the output flanges, and then reduction boxes going out to the drive sprockets. Is that basically whats going on? I've read that for fast track layers this is a pretty inefficient approach, and that most military fast track layers use a sexy triple differential system. Can anyone speak to this? Thanks!
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#49
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Don 1962 st-4 KL2ZF Snow trac's Rule and Krustys Drool |
#50
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Boggie,
Would you have any info relating to the routing, and hook-up of the cooled OC-12, hydraulic lines? My Differential is filling completely full to the top case cover, and I think it may be hooked up wrong. Snowcat Pat has completely rebuilt my unit, and it has "0" hours. My choice of lube is Chevron Synthetic All Weather THF. The Cat is a 1976Thiokol 2100C Thanks for any tips, fischerrc4 WA State fischerrc4@yahoo.com |
#51
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I don't want to hijack this thread, but is there an exploded view or disassembly photos of one of these differentials somewhere?
I'm inexplicably drawn to understanding mechanically, how they work...
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Av8r3400 I'd rather die trying to live,
than live trying not to die. -Leonard Perry |
#52
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go back to the snowcat main page here on the forums there is one there that I sent in pdf format several years ago part A and part B
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The Tracks you leave today, Will lead you to the future! |
#53
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Thanks- |
#54
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Because Sno-ops machine has the OC-12 (1450 Super Imp) where yours is the OC-4 (yes let me repeat that "OC-4") in a 1404 Imp.
While I'm being insistent I'll add that I don't think shell Aeroshell aircraft engine oil is nearly as good as TDTO transmission oils. From what I've seen looking inside and rebuilding these diffs. -Pat |
The Following User Says Thank You to Snowcat Pat For This Useful Post: | ||
KickerM (02-06-2016) |
#55
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I ended up going with the Caterpillar TDTO 50 weight in my 1404. I did notice an improvement in steering, but not to the extent that Snow Ops did.
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-Jon 1975 Thiokol 1404WT IMP Colorado |
#56
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Not just the steering but also better protection of the gears and bushings. ZDDP.
-Pat |
#57
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Our 1988 LMC1200 has the OC12 with drop down boxes, hydraulic pump and cooler. No other hydraulics on it. What would be the best oil for it and how much will that setup take? I've poked around here and it seems that Shell Donax TD would be a good choice. Except now Shell calls it Spirax. Thanks.
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#58
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any of the tractor oils or wet disc clutches I run amzoil power shift in mine I'm not sold on one oil being better than the others because its some one like shell that makes the oils sold by the tractor company's like cat or john deere. those oils by the way have a good following here I wanted synthetic oil my reasoning for amzoil
__________________
Don 1962 st-4 KL2ZF Snow trac's Rule and Krustys Drool |
#59
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Thanks for the info Snowtrac. Any idea how much I need? I have heard from 6-8 gallons.
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#60
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if you have drop boxes and no pump its about 5.5 gallon too fill to the plug if you have no plut add another gallon over the plug for additional cooling as per snowcat pat
__________________
Don 1962 st-4 KL2ZF Snow trac's Rule and Krustys Drool |
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