Hey guys, Texman here again. Used my Bushhog Sq6000 today for first time. After hooking it up to hitch and pto i found the pto lever would not engage with clutch in while tractor was running. I had to kill tractor and engage pto lever (low rpm) and start engine to get pto to work. Previously i had tested pto without the implement on the tractor and the lever would engage while tractor was running. Am i missing something here? (like a brain?) All replys appreciated.PS, I can disengage the pto lever while engine is running, and the clutch in full down position does not stop pto from spinning.
F/P 2425 3 pt pto not engaging while running
- Thread starter texman
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greg_g
Super Member
- Joined
- Dec 18, 2003
- Messages
- 6,126
- Location
- Western Kentucky
- Tractor
- JD3720 Cab, 300X loader with 4-in-1 bucket
Hopefully you don't have a loader on that tractor. Because you need to open the clutch inspection ports on your bellhousing and see what the clutch fingers are doing. When mine did what you describe, one of the fingers had loosened against it's spring and needed tightening back to the position of the others. In the end, you might have to adjust the pedal linkage to ensure all three maintain the proper 2.5mm gap.
//greg//
//greg//
RonMar
Elite Member
I recall one member from Austrailia that had bought one that had sat on the loading dock quite a while and his PTO pressure plates and disc were rusted. It took a littlewhile to break things free. IT does sound as Greg suggested like perhaps the pedal adjustment, lever adjustment or adjustment between pressure plates has perhaps worked loose, especially since you were able to engage it in the past.
When you step on the cluch pedal, the throwout bearing slides forward and touches, then pushes on 3 levers. These levers lift the rear pressure plate and release the rear clutch disk that is on the outer transmission input shaft that turns the main gears in the transmission.
That rear plate has adjustable bolts that connect it to the front pressure plate with a measured gap in them. As the rear plate lifts, the slack on these bolts between rear and front plate is taken up and the rear plate lifts the front plate. Lifting the front plate releases the forward PTO disc that rides on the inner transmission shaft that spins the PTO gears all the way back at the rear of the tractor.
If the gap Greg mentioned between throwout bearing and the 3 levers is correct and uniform with the pedal all the way up, at approximatly 1/2 of the pedal stroke, the rear plate and clutch disc should be fully disengaged and the rear plate should begin to lift the front pressure plate. This 2 stage relationship allows you to shift gears using only half the clutch pedal travel, wihout disengageing the PTO impliment.
It could be that your clutch linkage has wandered and increased the gap between throwout and levers so that full pedal travel is not enough to lift the PTO pressure plate and free the PTO disc. It could be as Greg suggested the adjustment of one or more of the fingers has wandered so the discs are not being lifted evenly and this misalignment is preventing the front plate from being lifted fully. Or it is possible that the adjustment between plates has wandered and there isn't enough travel to lift the front plate. A quick check before you disassemble anything is to see if you can drive and shift gears using only the first/upper half of the clutch pedal travel. If it is taking more than 1/2 pedal to disengage the main clutch to shift gears, then you probably have a pedal or lever adjustment out of wack somewhere. IF you can drive and shift with half clutch pedal, then the poblem could lie in the linkage bolts that connect the two plates. second plate lifting late/not fully lifting.
Check the setup from rear to front. With the pedal at full height, first check the throwout to finger spaceing(pedal freeplay/free travel). Then check at what point in the clutch travel the rear plate starts to lift the front plate. It should start around 1/2 pedal. Because of the design, these plates don't move vey much, so a helper with a strong leg who can slowly and accurately position and hold the clutch pedal is really helpfull.
Here is a link to a thread last week about a harsh clutch. I posted links to some excellent clutch info and adjustment resources there. http://www.tractorbynet.com/forums/chinese-tractors/109147-jinma-254-clutch-harsh.html
Good Luck
When you step on the cluch pedal, the throwout bearing slides forward and touches, then pushes on 3 levers. These levers lift the rear pressure plate and release the rear clutch disk that is on the outer transmission input shaft that turns the main gears in the transmission.
That rear plate has adjustable bolts that connect it to the front pressure plate with a measured gap in them. As the rear plate lifts, the slack on these bolts between rear and front plate is taken up and the rear plate lifts the front plate. Lifting the front plate releases the forward PTO disc that rides on the inner transmission shaft that spins the PTO gears all the way back at the rear of the tractor.
If the gap Greg mentioned between throwout bearing and the 3 levers is correct and uniform with the pedal all the way up, at approximatly 1/2 of the pedal stroke, the rear plate and clutch disc should be fully disengaged and the rear plate should begin to lift the front pressure plate. This 2 stage relationship allows you to shift gears using only half the clutch pedal travel, wihout disengageing the PTO impliment.
It could be that your clutch linkage has wandered and increased the gap between throwout and levers so that full pedal travel is not enough to lift the PTO pressure plate and free the PTO disc. It could be as Greg suggested the adjustment of one or more of the fingers has wandered so the discs are not being lifted evenly and this misalignment is preventing the front plate from being lifted fully. Or it is possible that the adjustment between plates has wandered and there isn't enough travel to lift the front plate. A quick check before you disassemble anything is to see if you can drive and shift gears using only the first/upper half of the clutch pedal travel. If it is taking more than 1/2 pedal to disengage the main clutch to shift gears, then you probably have a pedal or lever adjustment out of wack somewhere. IF you can drive and shift with half clutch pedal, then the poblem could lie in the linkage bolts that connect the two plates. second plate lifting late/not fully lifting.
Check the setup from rear to front. With the pedal at full height, first check the throwout to finger spaceing(pedal freeplay/free travel). Then check at what point in the clutch travel the rear plate starts to lift the front plate. It should start around 1/2 pedal. Because of the design, these plates don't move vey much, so a helper with a strong leg who can slowly and accurately position and hold the clutch pedal is really helpfull.
Here is a link to a thread last week about a harsh clutch. I posted links to some excellent clutch info and adjustment resources there. http://www.tractorbynet.com/forums/chinese-tractors/109147-jinma-254-clutch-harsh.html
Good Luck
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