Jinma 284 Clutch Problems

[gpmorin]

Success!

The picture came thru fine. So - after studying this picture and the cutaway view in the manual (for a long time), I determined that in fact the clutch disc was stuck. I tried jacking the left rear wheel and popping it free by rotating the wheel while in gear and pedal tied down. No luck there. My next move was to cut a wood dowel to fit in against the clutch disc (main clutch driven plate in the cutaway view). There is a slight groove in the disc that allowed me to tap away from the pressure plate. Doing this around the disc (manually rotating the engine) eventually popped it loose!!!

@piper184 - you have been exceptionally helpful with the details - thanks!

As usual, the forum members have guided me off the ledge (separating the tractor is not in the cards for now). I appreciate the help.

So I don't think I will let the tractor sit for extended periods going forward. I have a couple more repairs (minor) and plan on running the 1000 hour maintenance schedule.

Thank you!

Gpm

 

[Bob Rooks]

So I don't think I will let the tractor sit for extended periods going forward.

As I have previously stated many times, just tie or block the clutch pedal down when you are storing for extended periods. Storing inside or under cover (not tarps, that's really bad) will help a lot too. You want to eliminate as much condensation as possible.

 

[gpmorin]

Good advise. It lives under a shed roof. I now have an loop to keep the pedal depressed when parked.

Thanks all,

Gpm

 

[RonMar]

Being suspect of chines metallurgy in this level of manufacture, I don't know that I would recommend keeping the clutch pressure plate springs compressed for an extended length of time... they are disc springs and might not keep their compressive force... just use it regularly, you should really be running the engine and mixing up the oil in the gearboxes regularly anyway. also make sure the drain hole at the bottom of the housing is clear to allow any water to drain out if any finds its way in there.

Looking at your video, it looks like your clutch may be a little out of adjustment also. The 3 levers lift the primary pressure plate to free the main disc(drives trans via hollow outer shaft)which is sandwiched between the primary and secondary pressure plates. The other 3 outer bolts on the housing pass thru the primary plate and you will see they have slack in them. As the primary plate lifts, the slack is taken out and eventually the primary plate lifts the secondary plate. The secondary pressure plate sandwiches the secondary disc(drives PTO via inner shaft)between its inner/forward surface and the back of the flywheel. It was hard to see, but it didnt look like the secondary pressure plate was being lifted very far.

Set properly the trans should fully disengage by 1/2 pedal travel and the PTO should disengage as you reach full pedal. Set like this you can shift gears and drive the tractor without ever disengaging the PTO.