I have a Jinma 284 that I use to do property maintenance (run a brush hog, box loader, etc.) Yesterday I hooked up a used (older) 3-pt post hole digger/auger for the first time since I picked it up at auction. The auger spun up okay, but the unit stopped rotating the moment it touched the ground - would not penetrate an inch into the soil. I assume that the problem has to lie somewhere with the post hole digger since the brush hog works fine. I'm not the most experienced person when it comes to ripping into anything mechanical, but I'm smart enough to follow instructions and take advice from people that have more experience then me. Does the Post hole digger have a hydraulic reservoir that has to be refilled? That's about the only thing I can think of right now that might be causing the problem...TIA
Jinma 284 PTO fails under load - running 3-PT post hole digger/auger
The auger should have a sheer pin in it. If the pto shaft is spinning and the shaft the auger pins to isn't the gearbox is toast.
Aw Crap....I'd hoped for maybe needing some gear oil, or maybe a clutch plate....
3Lfarms
Platinum Member
You said it spun fine until it encountered resistance. It sounds like it’s just a broken shear pin. If the gearbox was toast, I doubt it would have turned at all. Look closely at the shaft where the PTO shaft connects. There should be a set screw that keeps the PTO shaft from coming off of the gearbox when the shear pin breaks. Then there should be a 1/4 or larger hole through the PTO shaft for a shear pin. The shear pin is really just a sacrificial low grade bolt to protect the gearbox.
Remove the set screw and the PTO shaft should come off.
Some pictures would help.
Remove the set screw and the PTO shaft should come off.
Some pictures would help.
What he said but, the auger should have a sheer pin through the top of it as well. I've seen them break without either end of the bolt falling off so it looks like it's still good. Pto shaft same way. Look it over really well before pronouncing the gear box dead.
I went out to the property today and looked at the tractor. I started it up, ran up the post hole digger and checked the shaft from the PTO. It also stopped when the auger hit ground. I put the tractor in neutral, lowered the RPM a little and grabbed the shaft from the PTO - and the shaft stopped turning just from me holding onto it. So is this a clutch plate issue???? I'm a little worried, I'm starting to see dollar signs adding up.
CAme across this in another Jinma post...I will run out to the property (80mile round trip) in the next few days to check this out.///////
Before you go too far on the clutch, my Jinma has two levers to engage the PTO: one to the left of the driver's seat, which has three positions, fast-off-slow, and one under the driver's right heel. The one on the right you pull up to engage and step on to disengage.
If one lever is engaged but not the other the PTO shaft will spin slowly.
Before you go too far on the clutch, my Jinma has two levers to engage the PTO: one to the left of the driver's seat, which has three positions, fast-off-slow, and one under the driver's right heel. The one on the right you pull up to engage and step on to disengage.
If one lever is engaged but not the other the PTO shaft will spin slowly.
Dave M7040
Elite Member
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- Kubota M7040 Nuffield 465
You will get far better advice by posting pictures of both ends of the pto shaft, the digger and your tractor.
Since you run a bush hog, there should be not internal pto problems.
Shear bolt will likely be cause which is where seeing pictures will help...
Is there any manufacturer and model info on the digger?
David
Since you run a bush hog, there should be not internal pto problems.
Shear bolt will likely be cause which is where seeing pictures will help...
Is there any manufacturer and model info on the digger?
David
quicksandfarmer
Elite Member
If it's not that, it could be the clutch needs adjustment.
the PHD is a Greenline EM5000, and the tractor is a Jinma 284LE. I've posted pics of the tractor and the PHD....I hope they come through
Tractor.jpghttp://www.tractorbynet.com/forums/images/attach/jpg.gif
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quicksandfarmer
Elite Member
If it makes you feel better, I've had my Jinma for 11 years now and I still hit that **** lever with my heel from time to time and find myself wondering why everything stops.
Kernopelli
Veteran Member
- Joined
- Oct 16, 2006
- Messages
- 2,210
- Location
- Carterville, Illinois
- Tractor
- Mitsubishi MTE2000D, Dig It 258 Mini Ex, Deere Z930A ZTR
I did the same thing. I had a 284 and hopped on it one day and no PTO. The other problem here was I had an active online auction running to sell it. I was certain I had a big issue but I posted here on TBN and literally 6 minutes later got a response from Tommy at Affordable Tractor Sales telling me how to "fix" it. I felt like a FOOL but I was sure glad for the help!
Glad you got it worked out so quickly....going into auction any sign of mechanical issues drops that price WAY down.
Thanks to everybody for the suggestions. I've got it worked out....and I'm embarrassed to say it was a giant "senior moment" . I completely forgot about the "high-off-low"
speed lever and was only using the "engage - disengage" PTO lever.
speed lever and was only using the "engage - disengage" PTO lever.
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