Shimmy1
Senior Member
Funny you should mention that as I’ve been following your thread and have been experiencing something similar.
Our 6R, with C9 motor, is fine.
Both gauges go to half way and stay there, no matter what you throw at it or how hot the ambient temp. is.
Both gauges on the 7H just about go off scale with constant load in warm weather.
Like your 6H, gauges appear to be reading at least 10c higher than temps checked with two different IR guns.
Changed gauges and senders..made no difference.
Engine temp drops rapidly in neutral.
Trans barely drops, even after 15 minutes.
We had Cat do a TA2 inspection on the tractor before we bought it and all trans. pressures seem to be within spec.
Iam about to change both oil coolers, so see what happens.
I have posted numerous times about similar issues I encountered with a 7H. If you haven't checked the torque converter outlet pressure, that's a good place to start. Mine was way low. Ended up pulling the entire transmission valve body out the back, and removing every single plug, spool valve, and spring in the damn thing. The spool that controls the outlet pressure is this compound thing, a spool within a spool, that without the full service manual and hydro schematic I never would have figured it out. There was a tiny speck of something floating around in the pilot end of that spool. I was only getting about 40 psi of pressure, when spec is like 75ish. As I recall, I had to check the pressure I was looking for at the back of the tractor, not at the outlet valve on the torque. This was 20 odd years ago so I could be misremembering slightly. That solved the trans heating issues, never did resolve the hydraulics.