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Could be as simple as the hydraulic lifter control for the TPH being yanked up so high that it is deadheading the pump and bogging the engine. Nevermind how I know this can happen, okay? At least I shut it down before I blew a seal or pump body. :-)

Rich

agracat 254 engine problems
Jinma Farmpro Agracat Nortrac
Replies 3 Post by richwaugh

Yep, the NorTracs are re-badged Jinmas. Good little tractors that will do a lot of work if you set them up right and keep them maintained. As with any piece of equipment, timely and proper maintenance and attention to details will make the difference between happy ownership and problems.

There are four manuals that should come with the tractor - owner's, engine, tractor parts, engine parts. If you don't have all of them, I recommend ordering them form one of the reputable dealers like Affordable Tractor Sales or RanchHand Supply. The manuals are written in "Chinglish", but they contain a lot of necessary information on maintenance, repairs, etc.

Bought used nortrac tractor
Jinma Farmpro Agracat Nortrac
Replies 15 Post by richwaugh

That doesn't sound like it should break an axle. I'd guess a casting defect - they do happen, on any brand of tractor. The dealer should make good on that.

The leaking connections aren't a big surprise, either. Chinese hydraulic connectors are prone to that since they use a goofy (in my opinion) style of seal. If you can get some "bonded washers", the ones with the rubber fused to them, of the appropriate size, they usually do the trick on the loader hose connections. Otherwise get a good stock of the right size metric o-rings.

The aftermarket loader control my just need the connections tightened a bit. They're probably JIC or SAE connectors.

As for overloading a bucket on a loader, it is entirely possible, particularly with big rocks, concrete or really wet heavy clay. To say nothing of scrap metal, etc. My loader bucket is 5' wide and rated at about 900# load - I can easily put more weight than that in it, but that just risks damage.

A bucket that was small enough to ensure that a user couldn't overload it weight-wise would be uselessly small when working with lighter materials. No matter how foolproof you try to make a piece of equipment, there is someone out there who will manage to screw it up. (grin)

Jinma 454 Front Axle broke
Jinma Farmpro Agracat Nortrac
Replies 7 Post by richwaugh

Some water pumps had them, some didn't. The ones that do require a special lube gun to lube them, so that you don't over-pressure the lube and blow the seal in the pump.

change oil on fuel pump ty 290 20 hp
Jinma Farmpro Agracat Nortrac
Replies 8 Post by richwaugh

The tach sender is not a coincidence - it is because all vehicles have feelings and you worked on all the others and neglected it so its feelings got hurt and it died. :-)

The fuel sender probably has a bad ground or may have gotten jostled enough to need adjusting. You *can* get it out of the tank without removing the cowling; you'll need to remove the instrument cluster so you can reach through the hole to access the top of the fuel tank. You can do it from the engine side but you need arms like an orangutan. When/if you pul the sender out, be very careful with it. It is comprised of a sliding potentiometer that is wound wit wire finer than the hair of the proverbial Scandinavian princess. Just look a tit wrong at it can break. Mine broke spontaneously and I managed to solder it back and get it working but it was pretty fussy work - like doing a circumcision on a mosquito. :-)

Farm Pro 2425 Tach
Jinma Farmpro Agracat Nortrac
Replies 6 Post by richwaugh

The balls can be replaced with short sections of 8mm round rod, too. Doing so distributes the load over a much larger area than the tangent of a ball, reducing wear and quite likely allowing you to use that slightly damaged shaft. If you decide to use the little cylinders they can be cut off a grade 10.9 or grade 12.9 8mm metric bolt shaft. Don't make them much more than 8-9 mm long - it will make assembly more difficult, interfere with designed shaft play and is overkill on contact area. Be sure to slightly chamfer the ends so there is no galling when they shift longitudinally.

Farm Pro 2425 4WD working
Jinma Farmpro Agracat Nortrac
Replies 28 Post by richwaugh

The stack height *is* at factory spec, Greg. Fine tuned in place when new and then re-set when the tractor was split to replace a faulty gasket. At half pedal the drive clutch is fully released.

I just find that for the way I operate the tractor, I get the easiest release of the gear train (not necessarily the clutch) as the pedal hits about the 1/3 travel point. The gear train seems to like a wee bit of "drag" to slip smoothly, I would guess. The next step, of course, is engaging the following gear(s) and that happens at 1/2 pedal travel when the clutch is fully disengaged and the usual double-clutching drill is performed as necessary.

I had an old International deuce and a half that shifted much the same way, though of course it only had a single-stage clutch. It too liked a bit of clutch drag to disengage smoothly, prior to double-clutching to downshift. Upshifts were no issue on that rig - rarely needed the clutch if you were on top of things. I never had that trans apart, but I know it had no synchros and they sure felt like well-worn straight cut gears. It did have over 250,000 mountain miles on it so no surprise the gears were "worn in." (grin)

2003 farm pro 2425 clutch adjustment
Jinma Farmpro Agracat Nortrac
Replies 12 Post by richwaugh

JOhn,

I would suggest that you open up the pressure relief valve on the loader controls and clean it out. If that PRV sticks open you'll have complete bypass and no pressure to operate the loader. It does happen. Just watch carefully when you disassemble the PRV so0 you don't lose any parts or get them in the wrong order - a digital camera can be a lifesaver here. The valve has a spring in it, so take it apart slowly and carefully so it doesn't go "sproing!" and send parts flying all over.

Jinma 224 Loader does not lift or tilt
Jinma Farmpro Agracat Nortrac
Replies 23 Post by richwaugh

Terry,

I believe that FarmPro is a re-badged Jinma 254/284 so you should be able to get manuals from either Affordable Tractor Sales in Houston, Texas or RanchHand Supply in Virginia. They both have websites.

manuals
Jinma Farmpro Agracat Nortrac
Replies 3 Post by richwaugh

That deck lift motor should have a limit switch that shits off the motor when it reaches its limit, shouldn't it? You might look into that. If one isn't installed it could be retro-fitted easily enough - a microswitch and a relay would do the trick just fine. You could also retrofit a circuit breaker in place of that fuse for about eight bucks. They make them that plug into the same slots as a regular blade fuse or as stand-alone units you wire inline. Shouldn't take more than thirty minutes to solve the issue.

Jinma 284 Ammeter 30 Amp fuse keeps blowing
Jinma Farmpro Agracat Nortrac
Replies 59 Post by richwaugh

Well, there's a fair chance that you screwed the pooch by running the engine with the loader hoses not connected together. What you maybe did was to "deadhead" the hydraulic pump and that may have blown the seals (best case) or cracked the case (worst case). It is also possible you didn't do any damage, if you get really lucky. If you blew the seals you'll find that your engine oil level is mysteriously increasing - that's hydraulic fluid passing the shaft seal and entering the crank case. Something to watch for.

If the TPH raises okay, then the pump is *probably* okay. Only way to tell for sure is a pressure gauge.

The TPH failing to drop is a function of the flow control valve under the front of the seat, as Greg noted. Those valves can get dirt in them, particularly if you haven't ever flushed the hydraulic system and changed to the proper USA fluid. If there is dirt in the valve it won't open fully and the hitch will not drop properly. It is easy enough to pull the valve out and clean it thoroughly and reassemble it. If that doesn't correct the problem you're now over my pay grade.

NT304C 3 point issue
Jinma Farmpro Agracat Nortrac
Replies 8 Post by richwaugh

I definitely wouldn't recommend using the synthetic oil until the break-in period is complete. Everything I have heard and read says that dead dinosaur oil is preferable for break-in. It's also way cheaper, particularly if you change it after the first five hours and again after twenty hours to get rid of the extraneous bits of metal, casting sand and dirt that are invariably in a new engine. After a hundred or two hundred hours is plenty soon enough to make the switch. <br>
<br>
For your location there in Wake Forest, I'd recommend the 15W-40 rather than the 5W-50. Running that low a viscosity in 32�F temps won't provide sufficient lubricating film strength. The 40 weight will be fine for your highs of 90-95�F, too.

Synthetic or not
Parts and Repair
Replies 15 Post by richwaugh

Wade,

You can get parts for that mower from Affordable Tractor Sales in Texas. I just checked with the owner and he says they have them in stock. You can call him at 979.865.4002 or email him at tommy@affordabletractorsalesco.com and he'll fix you up.

JM Finish Motor
Jinma Farmpro Agracat Nortrac
Replies 15 Post by richwaugh

[QUOTE=Murf;178199] The small ~$200 wood splitters have no hydraulics, they gear reduce a 120 volt motor to spin an Acme threaded rod, the splitting wedge travels on that thread.Best of luck. [/QUOTE]

Aha! So they're using a linear actuator to push a wedge. I suppose you could develop sufficient force for low bucks that way, if you were patient. They'd have to gear the thing way down to get much driving force, I'd guess. Thanks for that info. Living in the tropics, I need a log splitter like a frog needs a Ferrari. :-)

PTO powered splitter
Jinma Farmpro Agracat Nortrac
Replies 15 Post by richwaugh

to the best of my knowledge none of the Jinma dealers offer a rebuild kt for the OEM Chinese loader valve. There have been so many problems with them that most folks simply replace them with an aftermarket valve kit and never look back. That's what I did with the valve for my Jinma loader on my 304. I got the replacement kit from Ronald at Ranch Hand Supply. Not cheap, but such a huge improvement that it was well worth it. Took me just about an hour to do the job, which include new hoses supplied with the kit.

FEL control valve
Jinma Farmpro Agracat Nortrac
Replies 6 Post by richwaugh

Oil pressure will run about 7-9 psi at low idle up to around 35-40 psi at full rpm. Coolant temp should be 180 degrees. Either too high or too low is not good. Radiator cap should be 7 psi.

oil pressure
Jinma Farmpro Agracat Nortrac
Replies 6 Post by richwaugh

It would help if we knew what tractor is having the problem. Did you try jumping across the solenoid terminals on the starter itself? Across the starter motor terminals? You have a problem, probably somewhere between the battery cables and the starter but you haven't given us anything upon which to make a diagnosis.

If it will turn over when you jump form the solenoid terminal to the starter battery terminal then the problem is most likely in your ignition switch. If not, then check your battery cables and connections. If it will spin when you jump the battery directly to the starter motor but not when you jump the solenoid then the problem is most likely the solenoid. You need to do some basic troubleshooting.

Tractor wont turn over
Jinma Farmpro Agracat Nortrac
Replies 4 Post by richwaugh

The ATF I referred to is Automatic Transmission Fluid. Doesn't matter much what kind for this purpose. I think I usually buy Type A.

Greg, he said he already had the nut off, I thought.

Rich

Jinma steering wheel
Jinma Farmpro Agracat Nortrac
Replies 8 Post by richwaugh

Yes, you can put chains on the tires and no, it won't hurt a thing - except your back crawling around putting them on. :-)<br>
<br>
Given that you're running turf tires in 2WD on that tractor I'm not sure you'll be able to move much dirt with a box blade any bigger than 4 feet. One of those tings can put a lot of drag on the tractor when it is digging in, especially if you're using the scarifiers. Of course, you can run the tire chains on dirt, too. That will definitely help your traction. Are your tires loaded with water for extra weight and do you have wheel weights installed?<br>
<br>
Any tractor, (named that because they are "traction" engines) will exert a lot of pulling force in low gears. Even a little 2WD such as yours can pull amazing loads - as long as it can get traction to move. The smaller they are the less they weigh and so they have less traction against the ground. Likewise with smooth tires as opposed to aggressive tires like ag tires. Anything that you can do to improve the "connection" between the engine and the ground will translate to improved ability to do work. The ultimate ground connection is a fully tracked vehicle.<br>
<br>
Rich<br>
<br>

box blade
Jinma Farmpro Agracat Nortrac
Replies 5 Post by richwaugh

Reverse the leads.

gas gauge
Jinma Farmpro Agracat Nortrac
Replies 12 Post by richwaugh