Jinma will not start - how to check injector delivery?

[borktown]

My Jinma tractor will not start. Have put a new starter in, but is not getting fuel delivery. It starts and runs fine on an ether shot, so what do I need to ckeck next? I am thinking injectors or fuel line...any advice? Anybody know of any online "how to" video sites for Jinma specifically?
Thanks

 

[Rich Waugh]

Need a little background information here. Did you run the tractor out of fuel prior to this, or did it just stop starting? Has anything been done to the injector pump that would affect the timing, or have you recently checked the oil level in the injector pump. All these things can affect starting, as can bad fuel, diesel bugs, collapsed fuel lines, blocked tank filter screen, bad seal on the sediment bowl reservoir, etc.

To the best of my knowledge there are no videos online for servicing Jinma tractors.

 

[bluechip]

We don't know which model Jinma you have, but most have hand primer pump mounted on the injector pump along with a bleed screw on the head of the pump. on may 200 series, there is a metal ring in the bleed screw, on others it will just be a slotted screw near where the metal lines come out of the top of the injector pump. Unscrew the primer pump till it pops up and open the valve, pump till you get fuel out the bleeder. If no fuel, you will have to find the problem with supply to the pump. If fuel at bleeder, then crack open the hex nuts on teh metal line where it attaches to the injector. crank engine looking for fuel. If no fuel, be sure stop lever on pump is in the run position. if so, you have a inj pump problem. If you have fuel, re-tighten the lines and hopefully start the engine. This is the procedure if you run out of fuel as well...

 

[bjr]

Yes, check that fuel is actually flowing from the tank. The tank shut off valves have very small orifices and the smallest amount of debrie will plug it and also the tank strainer needs to be cleaned. bjr

 

[20 20]

1st off throw that can of starting fluid in the _____pile. Unless your machine is old worn out and/or dying keep the SF away. Check your filter/s, shut off valves, lines, tank etc... then try the primer. It is probably something simple. Give us a little more info on what happened.

 

[borktown]

Thanks so much, we are working nights tonight and will take a really close look this weekend, will post with pictures and see what other great advice you have...love this forum.

 

[bluechip]

I forgot to mention the thimble shaped strainer that is in teh banjo bolt at the bottom of the primer pump, where the fuel line feeds the injector pump. I have seen these plugged with rubber debris from the hoses as they decay. the Chinese rubber is not very good, if you find a bad hose, you can replace it with hose from your auto parts, just grind the crimped clamp off the banjo fitting and use hose clamps to install the new hose. better hurry though, fuel hose is getting very thick to prevent emission by osmosis....

 

[Diamondpilot]

I did not read every post but check the filters in the hoses, tank, and the fuel shut off itself. I have hear of guys pulling the fuel shutoff and it sticking at the injector pump.

Chris

 

[greg_g]

Unscrew the fuel filter. If it's full, everything's working between the tank and the injection pump. That way you know which side of the fuel filter your problem might be.

Also - have you ever checked the oil level in your injection pump?

//greg//

 

[mtaylor2420]

I am having fuel delivery issues also. How much fuel should come out of the fuel lines while the engine is turning over?