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Horsthorse

Necessary to change Hydro Transmission Oil

By Horsthorse, in Transmissions and transaxles

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Horsthorse    0

Horsthorse
Posted

I'm new to this site, and have a basic question.  I have a 1986 312A, with 865 hours on it on which the hydrostatic transmission fluid has never been changed.  Is it necessary/recommended to change the fluid at this point, or not?  What replacement fluid should I use?  Is the NAPA 1410 the best filter to use?  Thanks, Barry

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squonk    47,879

squonk
Posted (edited)

I don't think the 312A uses a filter. I thought they came with the Eaton 700 but I may be wrong. If it does have the better trans with the filter, change the oil and use a 1410 and Mobil 1 10/30

Edited by squonk
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953 nut    68,419

953 nut
Posted (edited)

:WRS:      Page 20 of this manual covers your tractor's trans. As Mike said, no filter and the manual did not call for a change.

 

Edited by 953 nut

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shallowwatersailor    3,221

shallowwatersailor
Posted

Unlike the Eaton 1100, the Eaton 700 (unless replaced) actually has two different oil reservoirs. The transaxle requires 10W-30 like a manual Wheel Horse transmission. That is easy to do as the drain is the 1/4" NPT plug underneath. Fill it through the dipstick tube.

 

The transmission was filled with a derivative of a 20W oil. Later Wheel Horse lubrication sheets indicate that a 30W oil was allowed to be substituted. You can use a turkey baster to remove a few ounces from the reservoir, or pull the right rear tire off and look for a plug under the transmission. The transmission's oil just circulates within the transmission and the reservoir acts like the overflow tank for a car's radiator.

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