mcratchet1

I’m assuming this is probably an ecu issue ?

So I changed that green ac switch the fan is now working properly. But now if you turn ac on the fan stays engaged all day

No it’s not broke but yes seems to wobble when clutch is engaged. The problem I’m having is it stays engaged 75% of the time. As soon as I leave in the morning

Ok finally checked it out blowing air does dis engage clutch. I have air going into that air switch but no air coming out. I have power but no ground. When I add a ground everything works. Checked wire to harness I do not see any issues. Does anyone know where the ground comes from? Also does that air switch disengage with ground or power? I also added a video does it look like clutch has to much wobble? IMG_8323.mov No when I shut off key fan stop almost immediately. That’s with clutch disengage. Also when I unplugged ac line switch the clutch engaged. The truck is cold so it should not engage.

Ok finally checked it out blowing air does dis engage clutch. I have air going into that air switch but no air coming out. I have power but no ground. When I add a ground everything works. Checked wire to harness I do not see any issues. Does anyone know where the ground comes from? Also does that air switch disengage with ground or power? I also added a video does it look like clutch has to much wobble? IMG_8323.mov

Sorry it is an mr688s it’s off in the morning for just a few mins then stays engaged the rest of day until just idling at shop but temp never goes over 180 if I remember correctly it only engages when temp hits 200

I have an 07 mr688s with a Horton pneumatic fan clutch. Having issues with it constantly staying engaged. What’s the best way to diagnose if it’s a faulty sensor or bad clutch? Thanks in advance

Ok got it I’ll clean it up and pull top cover of transmission thanks

Just to clarify the cover we’re talking about removing is on the back side above yoke? Four bolts to remove, I tried to pull that one off but does not want to move back. Didn’t want to try to pry it off. Never removed that one before is it ok to tap it back with a rubber mallet?

Is this it under back cover the attached pic

Yes I flip the button before taking it out of high gear to go into low. I tried it in neutral as well no difference

No I did not is there orings inside that cover? or what should I look for

The range button moves good I did not see any kinks. It does not do this all the time but probably 5-6 times a day

Yes I can hear it shift but when I take off in low gear sometimes it does not grab a gear like it’s in neutral. It’s not shifting all the way to low gears. I can flip the button back and forth and hear it though

Hello I have a 2013 mru 613 with T310 10 speed tranny. Couple times a time I cannot get it to switch to low gears. When I stop sometime I toggle gear switch up and down then I can. Other times no luck and I take off in 6 gear. I replaced hi/lo valve thinking maybe internal leak but no change. Also new oil, check for air leaks nothing . Does this sound like an internal problem. Any help would be really appreciated