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Harry Ferguson Tractors Discussion Board

Re: 80-140

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Posted by John(UK) on October 16, 2012 at 02:09:44 from (

In Reply to: 80-140 posted by miner09 on October 15, 2012 at 17:11:17:

That oil you mention is far too heavy, while you could use it in the transmission, it is the hydraulics that you have to consider, it is far too heavy and would cause the control Valve to stick and could also cause too much pressure to be developed and that could cause parts to crack due to the pressure. The oil that you should use now all year round and it is OK in hot or cold climates is Multi-grade 10W/30, this will remain fluid down to -25 and it is a good oil to use for the transmission because of how it is blended, it has anti-wear properties which is a big help on these hydraulics. Change the oil every 12 months and only when it is hot, leave it draining over-night and then refill 2 gallons at a time leaving some time before you add the next lot or the level could rise too high in the transmission and run through into the Clutch Housing. It doesn't matter that you are not using it in a cold climate, this oil is good for any use. A thinner oil is always better than a thick gooey one for hydraulics and it will spray around the inside which will help to prevent rust and condensation when it is standing long periods.DON'T use diesel or Kerosene to wash out the interior of the transmission as you can't drain it all out due to the shape of the floor of the housings, just drain it when hot..John(UK)


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