Help with Brand New Jinma 284

dontn · May 8, 2004

Just got my new Jinma 284 and already have a problem. I have used the tractor for 10 hours. Engine stopped and would not restart. Seemed like a fuel problem. I noticed that diesel was leaking from the plastic fuel reservoir. This container was also squeezed together from some type of pressure. If I pump the manual knob. The engine will start and run for a few minutes. I removed the plastic fuel reservoir and notice that there was a crack at the top.

Could this crack cause the engine to not remaining running or is there another problem that I should check?

greg_g · May 8, 2004

It's called a sediment bowl, and there should be a cutoff valve on the side. Fuel flows from the tank, through the valve, into the sediment bowl, down a rubber hose, and into the injection pump. One of those intermediate components is preventing fuel from the tank from reaching the pump. Or else your tank is empty, but with 10 hours you've quite likely refilled it at least once. I am pretty sure it's a gravity feed, so there shouldn't be any suction from the pump to have collapsed the bowl. I've seen them crack in the winter - water in the fuel - but don't know what would have done it this time of year.

Verify the cutoff valve is full open. Replace the damaged sediment bowl - don't try to repair it. Remove the hose, check for blockage.

//greg//

dontn · May 8, 2004

Thanks Greg,

The fuel tank is full. I made sure that the valve on the sediment bowl was open. When I pumped the knob, the engine would start and run for a few minutes then cut off. I will contact the dealer and get a new sediment bowl. Any other ideas on what I can try.

Thanks,

Don

SPIKER · May 8, 2004

DON: sounds like it could be a clogged screen:

if you remove the filter bowl compleatly there is a screen on top which often when NEW gets contaminated with junk and blocks it up stopping fuel, then there is also one on the bango fitting at the fuel line to injector. screen that is. sounds like it is one of those. clogged up.

also the VLAVE on the sediment bowl on mine is actually backarsewards, when turned in what appears to be OPEN it is actually CLOSED and I found this out exactly like you did pumped and re-primmed it 2 times then finally figured it out it let just enough fuel through to PRIME it and fill the fuel filter but not enough to keep it running. my OPEN is actually straight across the fitting and closed was down.

other items make sure all the fluids are topped off injector, oil is easy to miss. I assembled mine and the CRUD that came out was only one step above CRUDE oil which the china used to test run them... this was about 1/2 gallon of stuff that looked to be drained form the bottom of the septic tank :x

try these few items first then check back.

Mark M /forums/images/graemlins/cool.gif

greg_g · May 8, 2004

If you lost fuel supply to the pump, the engine may have used up what was in the filter too. Loosen the filter so as to break the seal, then use the hand pump again. If just bubbles come out - or nothing at all - you're pumping into an empty filter. Pump until the filter overflows, then tighten it back down. If the engine still doesn't start, you may have to reprime the injectors. Same principle; loosen one, pump till fuel flows, tighten back down, repeat. Start.

//greg//

Soundguy · May 8, 2004

I would crack the hose right at the injector pump and see if you are getting a steady fuel flow there too.. when you pump..

Soundguy

JohnS · May 10, 2004

After replacing sediment bowl, I would try Spiker's advice, and followed by Gregs and SoundGuys priming/bleeding suggestions, if it didn't clear it up.

BTW: I have heard of a number of broken sediment bowls, within the last year. Something changed where they are getting damaged on shipment.

exportcn · May 10, 2004

The hand pump broken ,change a new one

exportcn

Twobits · Jul 10, 2004

John:

At 103 hours the sediment bowl on my 284 cracked. I determined that there were a couple of reasons: firstly, the plastic had become brittle. I have to believe it is in the formula of the plastic, as to date I have only run number two diesel, with no additives. Secondly, the two hoses for the power steering are routed very close to the sediment bowl, and one of them was exerting a little pressure on the sediment bowl; where the plastic was "flattened" by the hose, it cracked. I loosened the fittings for both hoses, and while retightening held them at positions that kept them from touching the sediment bowl. I also used a wide wire tie to keep the more forward one from contacting the bowl. Installed a new bowl, and everything is fine again.