Gordon Smith towable ATF Leak

by Kenny

I have a 1989 200 CFM Gordon Smith towable with rotary screw and John Deere Diesel.

It has started leaking ATF fluid from the throttle actuator and 2 other air/ATF valves.

Not sure what their purpose is or how they work as I am new to towable compressors.

Problem seems to have started at the same time and at a fluid change. Reservoir was not overfilled.

System calls for Dexron II which is no longer available. Dex II replacement was used.

Fluid seems to have a slight foam showing in the sight glass after shutdown.

How can this be corrected or can a serviceable replacement part be found anywhere?

Would also be interested in owner or service type literature. Thanks

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Apr 05, 2017
Kenny - re: Gordon Smith towable ATF Leak
by: Doug in s.d.ca.

You're welcome.

Sorry, don't know about the diaphragm - never had occasion to look. Please let us know if you find a fix, though.

Apr 05, 2017
by: Kenny

Did not change separator, scavenge tube and all other tubing clear, no debris in fluid when drained. General Motors says replacement for Dex II. "Formulated for use in automatic transmissions calling for Dexron II, IID, IIE, IIIG, IIIH". I have since disassembled these controls. One has some corrosion on a steel internal part. All have questionable seals and O-rings. The O-rings are not a problem, but there is one seal similar to what would be found in a brake cylinder but much smaller, maybe 1/2" ID. And a diaphragm type seal. Can a serviceable replacement be found for these controls?

Thanks for your reply

Apr 04, 2017
And another thing...
by: Doug in s.d.ca.

Did you also change the separator? Your scavenge tube could be blocked, which eventually will get ATF all over everything.

Apr 04, 2017
ATF Leak
by: Doug in s.d.ca.

Who said the stuff in it is equivalent to Dexron II?

Sure sounds like it's eating gaskets...

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