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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

case 850 dozer driveshaft to trans slow when cold

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chris r

02-08-2008 19:20:52




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driveshaft to transmission turns fine when foward reverse lever is in neutral but has to warm up along time before it will move dozer or it will move dozer for x amount of feet and then shaft stops turning put in neutral and shaft spins again and will go so far and repeat.
when machine warms up usally 1 hr or .5 hr trans is grabby and everything works great.changed suction and pressure filters and oil.pressure gauges for torque converte is 100 when cold and 75 when warm and trans pressure runs about 290

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jamesh

02-09-2008 07:15:58




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 Re: case 850 dozer driveshaft to trans slow when cold in reply to chris r, 02-08-2008 19:20:52  
Sounds like your charge pump is bleeding down. My 850 does the same thing.Since I"m too cheap to replace mine,I add a qt.of break fluid to transmission oil every 2-3 months.This swells the seal on the pump and gets it to work everytime.Mines been like this for over 5 years.



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