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1990 JD 318 with Front PTO / Clutch Grinding??

1074 Views 10 Replies 3 Participants Last post by  Wolf44
On my 2nd 318...... but now troubleshooting a grinding metallic issue with the clutch 'plate' and ???? Dad and I just took it all off due to a very loud - bearing with sand in it grinding sound coming from the front PTO/CL area.......

Was a Rock found inside, but even still, with the belt on and Gapped correctly, I still have the grinding sound. constant screeching. Its steady, not like a warped sound

The bearing was fine, the mag plate held a bolt/socket easily when engaged.........??? Dad's like it seems the plate that covers stuff needs to be further away vs being pulled closer. The surfaces seemed flat

When its gapped further out and doesn't engage right,, it is quiet and sounds great. Like my former 1987 318

Compression was 126 / 122 roughly, so I can only hope this is a good unit that replaced my LX 178, sadly i sold my 1987 318 due to dealer advice.

When the tractor is off and we take the belt off and turn PTO by hand, you can hear it grind/scratch against the Rotor.....Dad felt it should turn freely without issue, but can't when gapped to .018

ANYONE in Minnesota ????????

What are we missing ?? this doesn't sound like my 1987 and just can't be good for the back of the rotor , or normal to us...

spent plenty on this one with 800+ hours, and a ..... for a paint resto..... but ...... hummmmm

Dad loves his x739 and wanted me to go newer, but I like Old School.....and wanted my former 318. Just hope I didn't get hosed.
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Here is the info on the key:

9.52mm X 9.52mm X 25mm, (CUT FROM 10' H64376) (SUB FOR M87505)

side - side - length
Check to see if the hub (it is the part with the bearing and spring fingers has a notch in it, that sets the over all spacing. It is the rotor that moves back and forth. Backward toward the coil (electromagnet) to engaged PTO. Forward to stop PTO and apply brake.
I would check the resistance of the coil, it should be around 4 ohms, also inspect the coil for damage (discolored, burnt, exposed wiring). To test for strength (with the coil out) hook the coil to another battery and see if it can pick up a very large bolt, or heavy tool (channel locks).
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