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Installing Square Style Seals In Powershifts

1

1370rod

Well-known Member
After installing the newer style seals in a 70 series powershift, take the C-2 shuttle out of the control valve and drill the small hole out to 1/8 in. Tractors with these seals installed from the factory have the 1/8 in. hole in them. The old lip type seal had natural leakage that allowed C-2 to dump faster. With the later style seals by opening the hole up, it helps let the oil dump away a little quicker. Those seals have almost zero leakage. Not a big deal, but if you have the valve off anyway why not do it. With cold oil it does help things release quicker. Rod.
a191993.jpg
 
(quoted from post at 08:51:01 05/22/15) After installing the newer style seals in a 70 series powershift, take the C-2 shuttle out of the control valve and drill the small hole out to 1/8 in. Tractors with these seals installed from the factory have the 1/8 in. hole in them. The old lip type seal had natural leakage that allowed C-2 to dump faster. With the later style seals by opening the hole up, it helps let the oil dump away a little quicker. Those seals have almost zero leakage. Not a big deal, but if you have the valve off anyway why not do it. With cold oil it does help things release quicker. Rod.
a191993.jpg
Click to expand...

Good info, Had never seen that before.

Mel
 
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