jinma 224 clutch adjustment

TSMART · Feb 1, 2010

The clock reads 440 hours on my Jinma now, bought new in 2005. With the help of a lot of folks here, I have been able to do all repairs myself.

My clutch is "grabby", and needs adjustment. I am really apprehensive about doing that myself; never had two stages on a car....can anybody link me to this procedure or some pics so I can determine if it's beyond my skills? I would not dare replace a clutch myself, just for the record. Clutches are not cheap!

Thanks.

TSMART · Feb 1, 2010

When I said "grabby", I mean forward motion doesn't occur till the pedal is almost all the way out, then it grabs very quickly. I do have 1" free play.

greg_g · Feb 2, 2010

Well, start by verifying or establishing the correct gap between the clutch release fingers and the throw out bearing face. I think for your tractor the gap should be between 2mm and 3mm (that's about 0.08" to 0.12"). You adjust that gap with the linkage rod that connects the pedal with the lever that sticks out the side of the transmission. There's a threaded yoke on the end. Determine which way to turn the yoke on the rod to achieve the desired gap. If grinding gears result, screw in the pedal stop bolt until the pedal travel is sufficient to stop the noise.

//greg//

TSMART · Feb 2, 2010

OK. I see the stop bolt and the yoke to adjust. There's a plate (prox 4x6")with 4 bolts in it located directly above the yoke. Is that my view access point to the clutch? No faking that I am a novice so thanks.

greg_g · Feb 2, 2010

You are correct. I think your tractor has one of those plates on either side, they might even be vented - I don't remember. If you remove the one on the left (as viewed from the operator seat), look in and to the right. You'll see a silver-grey bearing case (hopefully there will be no signs of bluing). Make sure it's free, you should be able to reach in and spin it with a finger tip. Immediately to the left of the bearing you may see one of three clutch release fingers. You can usually only see one finger at a time. To view the others, you must rotate the flywheel. That can be done with a socket wrench on the crankcase pulley nut. This is most easily (and safely) accomplished with the compression release open (and the tractor in neutral or course).

Anyway. Each of those three fingers is supposed equidistant from the face of that bearing, by a distance of 2.5mm (+/- 0.5mm). If the gap is already within tolerance, we can move on. If not, turning the yoke shortens/lengthens the pull rod - which in turn increases/decreases the gap.

//greg//

TSMART · Feb 2, 2010

Thanks.

I will check that out after work tomorrow.

Affordable · Feb 2, 2010

If you run into problems give me a call,I will try to help you with it

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

Ranch_Hand_Supp · Feb 3, 2010

TSMART said:
OK. I see the stop bolt and the yoke to adjust. There's a plate (prox 4x6")with 4 bolts in it located directly above the yoke. Is that my view access point to the clutch?

No !!, if you remove that plate you will have gear oil poring out !!

By the way you are describing the way your clutch is engageing does deserve checking/adjusting the clutch. There are several things that could cause it to grab/engage near the top of the pedal.

No way I can tell why it is grabby but, I can tell you that the stop bolt has nothing to do with it.

Contact Tommy or myself to help you verfiy your clutch adjustment.

Ronald
Ranch Hand Supply

biggerten · Feb 3, 2010

TSMART said:
The clock reads 440 hours on my Jinma now, bought new in 2005. With the help of a lot of folks here, I have been able to do all repairs myself.

My clutch is "grabby", and needs adjustment. I am really apprehensive about doing that myself; never had two stages on a car....can anybody link me to this procedure or some pics so I can determine if it's beyond my skills? I would not dare replace a clutch myself, just for the record. Clutches are not cheap!

Thanks.