FARM PRO 2420 TROUBLES

[Ranch_Hand_Supp]

#1; never have I adjusted a stack height on the bench or flywheel .

2#; We mount the new clutch pack, adjust the PTO clutch, reassemble the tractor and adjust the main clutch and free play, its very simple.


Tommy
Affordable Tractor Sales

#1; Smart man, trying to perform a stack height bench adjustment on a 200-300 series Jinma is just simply a waste of time, energy and thought.

Way back when .... I performed several bench adjustment techniques to see if I could increase shop productivity on these tractors when a clutch assy needed replacing.

Example; I like a 1/8 gap between the release bearing and the pressure plate fingers. Set it up on the bench (fixture), install it on the flywheel, slide the tractor back together and find the gap off.... either to close or to wide of a gap.

Reason, because the factory is not or is never consistent on where they drill the holes for the roll pins that attach the fork that pushes the release bearing.


See picture 13 under; 254LE Clutch Replacement

Click here; http://ranchhandsupply.com/techstuffus/254le354leclutch.html



2#; Me to. I will add to check the throw of the external linkage via the pedal stop (bolt in bell housing) while/when adjusting pedal free travel.


Ronald
Ranch Hand Supply

 

[kidney]

I would like to take this opportunity to say I appecicate the advice and posts of both Tommy and Ron. Your information and advice has helped countless tractor owers. I thank you and please keep up the good work.

 

[Affordable]

Thanks,I think that is why both Ronald, myself and other dealers don't mind trying to help you guys out,we work on these tractors everyday for a living.I have gained alot of customers and friends from this board and others.I don't know it all my any means but I have alot of hands on experience from older model Jinma tractors to the current models and there have been several changes over the years.

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

 

[RICHARDL]

look like i'm breaking it in 1/2 again. thanks will try it and let yall know what happens

 

[greg_g]

look like i'm breaking it in 1/2 again. thanks will try it and let yall know what happens

In the end, that may well be true. But look through the inspection window again. I either don't have the right tools - or enough imagination - to accurately measure the stack height through the opening. If you can see a reasonable way to do it, you might be breaking new ground here - and save a whole lotta work for other 200 Series owners in the future. Because if you can measure it - then you have a way of quantifying the actual results of turning on all of those nuts.

Remember. Target distance between Finger tips and forward face of PTO pressure plate = 96.8mm. Otherwise it's 96.8mm + the thickness of the PTO friction disc = target distance between finger tips and flywheel face.

Note: this assumes a flat flywheel face

//greg//

 

[greg_g]

look like i'm breaking it in 1/2 again. thanks will try it and let yall know what happens

If you do in fact decide to split the tractor again, there are a couple other things you might want to take care of. Not a few 200 Series owners have had major engine oil leaks in front of the bellhousing. If you do take the clutchpack off again, it would be a good time to torque down the bolts that hold the bellhousing to the engine. I've never had to do it myself. But of those who have, some added lock washers - some used LokTite - one guy to a harder grade bolt.

The other thing is to check the roll pin(s) in the clutch fork. It's a two fingered fork that moves the throwout bearing carrier. The pin(s) have been known to break, rendering the clutch pedal inoperative. If there's only one in there, you should double pin it. Put a 5x32mm roll pin inside an 8x32 roll pin, and drive them both into the hole. Even if there's already a pair, it might not be a bad idea to replace them with new. It's aggravating to have to split the tractor yet again for such a frustratingly simple problem, so this may be an opportune time to get ahead of the game.

One other thing on the stack height, and here's where my memory fails me. My 454 clutchpack needs to be pre-loaded before adjusting stack height, my 354 clutchpack doesn't. I simply can't remember whether the 254 clutch needs it or not. If you do stack height on the 254 flywheel, preloading is a non-issue. On the bench, I'm just not sure.

//greg//

 

[bluechip]

If you can get to the double nuts through the access hole, you may be able to adjust the clutch from outside. I believe the perscribed gap under those nuts is in the operators manual, and I don't have one with me now but it is measured in thousanths of an inch, just maybe .010 to .015, but I am not sure so check the book. ALL THREE must be the same so the pressure plate remains parrallel to the assembly as it comes back. (this is even more important for the 3 fingers clearance to the throw out bearing). Overtightening these could cause the PTO to disengage at the same time as the main clutch or it might even be binding the assembly so the main clutch does not disengage (as you describe). When properly adjusted, you will have about an inch to 1-1/2 inch of free travel of the pedal, then roughly about 3 inches of clutch resistance and the last 2 inches or so of travel it will get just a tad tighter, indicating the 2 separate stages of operation. (2 stage clutch). When bolted up, the fingers should be almost flat to the clutch assy, with the tips just a bit closer to the throw out bearing. If the tips are already too close to the clutch, there is no room to work. You may also be able to adjust these from outside.

 

[RICHARDL]

I GOT IT. I adjusted it all thru the side holes gapped it like ranch guy told me. Not ofense to the other posts. I have to do it a few times to make it work. but its working as of now. started putting it all back together last night. hopefully it wil be wofking by the weekend. I only use this tractor for my front end loader work. That goodness for ole John deere. I'm still waiting on Homier to call me back. Ordered the (3) forks they sent me one good thing the last time this happen i had some left over. its been 2 weeks. can't get anyone on the phone R thru email for 3 days. Boy i swear. any one know the ext. to the cheif over there? i'd sure like to speak with him for a spell

 

[Diamondpilot]

Just skip Homier all together. Order you parts from Tommy at Affordable, Ronald at Ranch Hand, or Chip at Artrac.

Chris

 

[RICHARDL]

Ok, well i thought i had my problem solved. Not so. i got it all back together. and it seemed to be working fine. The tractor started and i moved it out to make sure. well i was making final adjustments, tighting down everything and i noticed that my main clutch assembly bolts were't tight. so i tighten them down and re -adjusted my other setting. to make sure. well i went to move the tractor nothing pressed the clutch shifted it in gear nothing? no forward no reverse. So i loosed the clutch bolts i tighted and it worked again ??? Any one have a clue about this ????? Why when i tight the clutch assembly bolts it doesn't work?? and loose they do??? I think if i leave them loose they'll work themselves looser and fall out ??? i'm out of ideals

 

[Turbo]

check this out it may help.

JMClutchAdj

 

[RICHARDL]

MAN I TRIED adjusting. going to re-vist it again today. when i get home. I'm just wondering if maybe my clutch or clutches are bad? iT SEEMED to be slipping a bit when i got to 3rd gear But i'm going to try again today from the beginning and see what happens thanks for the pictures

 

[Turbo]

check this out

Chinese Tractor Owners Association - Clutch Adjustment Procedure for 200 & 300 Series - Instructional - Articles/News

http://ranchhandsupply.com/techstuffus/254le354leclutch.html

and this one

 

[RICHARDL]

Well, i go it broke in 2 pieces and took the clutch pack off evrything looked good. I'm just wonderig if when i put it back together i put it back with everything in right, or facing the right way. Both of the clutcheswere facing towards the rear. the only thing i'm concerned about are th e concial shaped disc. I looked to me the can only face one way But...... What i need is a diagrahm of the indivuadual parts so i can tell what goes where an how it faces. i did notice a few things that weren't lets say consistent. Going to try to find something today on that. I belive i;ve seen a parts break down somewhere. OR if any of you could tell me or have photos.
My clutches looked ok, don't know about the concial disc or springs as you are calling them. couldn't take pictures last night it got to late when i laid everything out. any help on how everything goes back will be nice.

 

[Turbo]

how about this

fig 4-1,
is connection- controlled dual stage clutch. It manly consists of three parts:
Driving part, driven part, and controlling part. Driving parts rotates with the engine flywheel: only when the clutch engages can the driven parts rotate with the engine.

Dual stage clutch should be adjusted on a fixture. The adjusting steps are as follows:

Adjust the length of the adjusting bolt to make the distance between 3 release levers (19) and the end faces of the PTO clutch pressure plate (4) is 96.8 mm, and the difference between 3 release levers and the PTO clutch pressure plate is no more that 0.1 mm
this was from the page, but it doesn't go far anough, or explain all the adjustment needed.

 

[Affordable]

Richard, make sure you check the fork that pushs the throw out bearing very close, it has a swell pin in it that can and does shear and the fork will look like it's working but it will move.This is very important because it will also make your adjustments change all the time.
This fork should be ridgid on the shaft you can test it with the tractor apart, if you need more details give me a call at my Houston Office 713-464-5521

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

 

[RICHARDL]

AND one more question. whats the trick to re-installing the driveshaft for the 4X4 to the transmission housing. theres 5 or 6 ball bearings and some kinda of washer. Grease?? to keep the bearing in place when you pull back on the spring??? that was a pain in the rear last time and i only got 4 of them back in

 

[Affordable]

Use wheel bearing grease to hold the balls inside the coupler, make sure all 6-on each end go back in or you are going to damage the 4 x 4 shaft

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

 

[RICHARDL]

I guess gregg never fooled with that before??? Hmm that's how i did it before with grease thinkin maybe there was another trick to it. I'm putting that sucker back togehter tonight I have a diagram an a plan so. we'll see what happens

 

[Turbo]

this may help too.

CHINESE TRACTOR OWNERS CLUB FORUM - Adjusting a Jinma JM254LE Clutch