M915A1 Fan Clutch

[martinwcox]

My fan clutch never disengages and I have checked the shutter stat for proper operation. I found a NOS fan clutch online so will swap out the bad one when that arrives. I did find this manual which gives a very good explanation and servicing details for those interested.

View attachment fd1_clutch_type_fan_drive.pdf

 

[wreckerman893]

There are bolts mounted on the fan clutch that you can remove and use to lock the fan in place. That will keep it engaged all the time. Usually used when, for some reason, the clutch won't engage when the temp get high enough. Have you checked to see if they are in place?

 

[Tow4]

With the engine off and the air bled off, the fan should turn by hand. If it won't turn, check for the bolts WM talks about.