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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Torq Converter

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H2

12-22-2006 03:58:44




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How does a torq converter work on a dozer. Is it just a hydraulic coupling to the transmission like on a car or truck? What are the beginning signs that one is going? Transmission pressure drop or slow down in speed?

My dozer does just fine, but it works a bit slow until warmed up. What is this telling me. Anything?

Thanks for the help.




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Bob Plumadore

12-23-2006 04:25:51




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 Re: Torq Converter in reply to H2, 12-22-2006 03:58:44  
what machine do you have? there is a difference in a torque converter and a torque divider. but if either appears to be slipping an oil and filter change may help. if not check your pressures.



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H2

12-24-2006 04:09:02




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 Re: Torq Converter in reply to Bob Plumadore, 12-23-2006 04:25:51  
I have a 1982 Fiat Allis 11B. It runs fine, but seems a little slow pushing. May be designed this way. It will spin the tracks fine, but doesn't seem to load the engine much. Spins long before the engine pulls down much. Will not spin in high. It's a 2 speed.



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Bob/Ont

12-24-2006 07:31:40




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 Re: Torq Converter in reply to H2, 12-24-2006 04:09:02  
If you can spin the tracks and it's not over heating I think it's okay. Watch for any signs of trans clutch slipping.
Later Bob



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Bob/Ont

12-22-2006 20:26:01




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 Re: Torq Converter in reply to H2, 12-22-2006 03:58:44  
If they really get into trouble like the Stator getting loose inside they will overload the engine and hardly move the machine at all. Can't push anything.
Later Bob



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seann

12-22-2006 10:24:57




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 Re: Torq Converter in reply to H2, 12-22-2006 03:58:44  
Like Bob said you want to check all the filters. My machine has reusable metal mesh suction and safety filters along with a large replaceable paper cartridge filter. If any one of these is partially obstructed, it can inhibit the flow of oil, especially when cold. After the oil heats up it gets thinner and can flow through the filters more easily, which might explain the sluggish machine when cold.

Make sure your trans pressure gage is working properly, and that your oil pressure is within limits. Also, make sure the oil level is up to where it should be. Merry x-mas/happy holidays.

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H2

12-22-2006 11:23:00




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 Re: Torq Converter in reply to seann, 12-22-2006 10:24:57  
Where are the metal suction filters located? The paper element is easy to change, but I'm not sure where if any others are located and what you have to do to get to them.



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seann

12-22-2006 12:37:44




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 Re: Torq Converter in reply to H2, 12-22-2006 11:23:00  
Depends on machine, and I'm not sure if every powershift machine built has this same configuration. But most I've heard of are similar. My suction filter is under the seat, the safety filter is in the engine compartment inline with the oil cooler lines heading towards the radiator.

Sounds like you need a manual, ebay is a good source for them at (usually) decent prices.



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Bob/Ont

12-22-2006 10:01:32




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 Re: Torq Converter in reply to H2, 12-22-2006 03:58:44  
Maybe an oil and filter change would help, clean any screens in there too.
A Torque Converter Multiplys Torque and works the same as in a car or truck. They work the best when under heavy load, giving the trans more torque and less speed than the engine is putting into them. That is a very brief discription. When they are working hard they make heat and if anything major was wrong you would be able to work better at start up than after warm up. When things go wrong they make more heat than the cooler can get rid of.
Later Bob

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