Front driveshaft Jinma

[Dadsgreenpsd]

ok, I am on my third time putting the cv bearings back in the front driveshaft of my 01 jm 254. Can anyone point me towards a permanent solution? Unfortunately, I am getting pretty good at this now........

 

[greg_g]

Are you talking about the steel balls on both ends of the driveshaft? Six on each end? If yes, what's happening? Is your driveshaft just dropping on it's own? Or are you performing some particular task when it happens?

//greg//

 

[Dadsgreenpsd]

Yes, the circlip is popping off, and sliding back on the shaft, allowing the balls to drop... This time, I wasn't even working it. I have been, the last few days, moving snow (20 plus inches in the last month). However, today, I was just trying to move it back to the garage. It's been a rough month, between the mentally challenged Volvo, the "POP" then no run honda, the vandalized honda, and the snow. Waah.

 

[RonMar]

Yes, the circlip is popping off, and sliding back on the shaft, allowing the balls to drop... This time, I wasn't even working it. I have been, the last few days, moving snow (20 plus inches in the last month). However, today, I was just trying to move it back to the garage. It's been a rough month, between the mentally challenged Volvo, the "POP" then no run honda, the vandalized honda, and the snow. Waah.

Circlip? Where exactly is this circlip located?

Is yours like the linked drawing below? I don't recall a circlip. The front cup slides onto the front diff input shaft and is pinned there, with the 6 splined driveshaft end and balls going into the forward cup. The rear cup fits on the longer splines at the rear and can slide. It rides against a spring in compression to hold the shaft fully engaged in the cups.

Is the rear cup not under spring pressure?

http://johnstractor.homestead.com/files/TransferCase.jpg

 

[greg_g]

Yes, the circlip is popping off, and sliding back on the shaft, allowing the balls to drop...

Both circlips are supposed to be covered by what the parts list calls a "dust cap". It's #6 in the diagram. I'd call lit a sliding collar. Have you perhaps lost one (or both)? Or does it perhaps not cover the circlip properly? Another possibility is the wrong sized clip. Pretty sure it's 24mm (inside diameter).

//greg//

 

[erj]

ok, I am on my third time putting the cv bearings back in the front driveshaft of my 01 jm 254. Can anyone point me towards a permanent solution? Unfortunately, I am getting pretty good at this now........

Here is a more permanent solution for those bearings that Rob posted for a Jinma 284.
http://www.tractorbynet.com/forums/chinese-tractors/155307-4-wheel-drive-repair-jinma.html
RonJ

 

[20 20]

I finally fixed mine, got sick of crawling under it all the time. It seems to me only a few of these do this{atleast on a regular basis}. I tack welded a washer to hold the 6 balls in place{only on the front} never had another problem with it after that{have sold it sense}. I figured where the clip grooved in was worn causing it to pop out, inturn causing the balls to fall out in the dust cover. Not saying this is your case, just what happened to me. You may need a new shaft or it could be something else???????

 

[Diamondpilot]

I have never had a problem and I beat my tractor up all the time. That being said I think I remember there being some drive shafts that the feeling was the groove for the clip was not cut deep enough allowing the clip to pop out and then the balls could fall out. Check that groove.

Also Robs fix is excellent. Its probably time to do it to yours.

Chris

 

[Dadsgreenpsd]

Great ideas! I just got it into the garage (icy, and an uphill slope...) so will be pulling it apart soon. Thanks! Probably should consider more weight on the rear while I'm at it.

 

[Affordable]

Make sure it's the right size circlip, and make sure the groove is clean it fits in. There is only 1- circlip on this shaft not two ? One of the couplers is held in place with a roll pin,the other coupler slides on the shaft with the spring behind it.Sounds like it's either a worn out coupler, worn shaft ,or the circlip is moving/wrong size.


Tommy
Affordable Tractor Sales Co
" Your Jinma Parts Superstore"
Home of compact Jinma, Foton, and Koyker Tractors and Parts, Wood Chippers, Backhoes - Affordable Tractor Sales Company

 

[SPIKER]

Also note that when that is fully fixed you will find the next weakest link, (the front drive axle, I just broke mine AGAIN.) Thanks to Tommy & the guys @ affordable I have the parts on the mail now. This is my 2nd go around (Same axle) has broken 2 times while in 4X4 while using it as a bulldozer. Not sure why the right axle has not broken or sheared off must be how the front diff rotates putting more torque to the left side?

Anyhow this axle was under load pretty good when it let loose. I was pushing a large pile of gravel that washed up & in to a large pile in the gully at my place with the heavy Ohio flooding. It re-directed the creek flood into my yard and I was attempting to move the gravel to get the creek back in its bank and out of my yard. It did leave me with 50+ yards of wash/run gravel in the park area I have made up, 2nd time for this to happen in 10 years. I had made about 3 or 4 trips from the gravel bank and had pushed it into a pretty good pile (scooped some & drive it 300 yards back into the drive which also was washed pretty bad.) I was just about done getting the gravel moved to get the creek back into the banks when I dropped down into the creek pushing some when it popped. I had to tip/tilt out a bucket full of gravel and push it back out with the rear DIF locked. I was hoping to get it back to the barn but it only made it 30 yards when the axle sheered rest of the way and wheel dropped out. It didnt look like it tore up the outer bearing but under closer inspection I decided to call the guys back & got one of those added to the order. probably somewhere around 200 or bucks if I remember right for the bearing gasket and axle in total..

Mark

 

[Affordable]

We appreciate the business Spiker

Tommy
Affordable Tractor Sales
"Your Jinma Parts Superstore"
Home of compact Jinma, Foton, and Koyker Tractors and Parts, Wood Chippers, Backhoes - Affordable Tractor Sales Company

 

[Dadsgreenpsd]

OK, finally got down to taking the driveshaft out. two snap rings on one end, shoved out of the groove, only one snap ring left on the other end. It was in the groove, but part of it was missing, which allowed one ball to jump ship. I am thinking that was what forced the shaft forward, thereby pushing the two on the other end backwards. Minor damage to the groove, unfortunately. I am probably guilty of not pulling the retainer off to examine the condition and number of snap rings on the last go around...