INJECTOR PROBLEMS: Chinese Tractors -- Jinma Farmpro Agracat  -- Chinese Tractors Discussion Forum and Review INJECTOR PROBLEMS: Chinese Tractors -- Jinma Farmpro Agracat -- Chinese Tractors Discussion Forum

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Discussion Boards > Active Subjects > Messages as Posted > Chinese Tractors -- Jinma Farmpro Agracat Forum

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 04-25-2005, 12:17 Post: 110325
JAMESC1212



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I HAVE A 284 JINMA FUEL INJECTOR IS NOT PUMPING FUEL UP TO THE CYL'S. HAS A NEW FILTER AND CLEAN FUEL. INJECTOR MODEL IS T7B WITH GOV. ANY IDEAS HOW TO FIX?






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 04-25-2005, 13:10 Post: 110333
greg_g



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Insufficient info. New tractor? Ever been started? If so, how long did it run before it quit? Under what circumstances did it quit running - out of fuel? Have you tried priming the fuel system?

//greg//






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 04-25-2005, 18:52 Post: 110338
JAMESC1212



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greg,
tractor is 2 years old. ran great. good fuel good filter. fisished mowind lawn , turded it off and went to start it the next day. it started ond then shut off anyhow after doing some investigating found out pump was not putting out fuel under any presure. do you think pump went bad?






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 04-25-2005, 19:41 Post: 110339
greg_g



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Which pump - fuel or injection? It's important to know if the fuel pump is not delivering to the injection pump, or if the injection pump is not delivering to the injectors.

Also, you stated "NEW FILTER". Did you reprime the fuel system after changing the filter? Being a closed loop, it can't prime itself.

//greg//






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 04-25-2005, 19:53 Post: 110340
JAMESC1212



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greg thanks again for your reply'
its the injector pump. yes the system is fully primed. the fuel pump works great.i have also tried by passing the filter all together. the injector pump wont even pump fuel up the lines to the injectors. could the pump itself be bad?
could the fuel shutoff valve be broken?have also blead all air out of the system.






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 04-25-2005, 20:16 Post: 110342
greg_g



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If you're trying to get the hand primer to pump fuel up to the injectors, it won't work. It's only good as far as the end of the flexible fuel lines - which is the input to the injection pump. Once you confirm that your fuel pump is delivering to the injection pump, you have to make sure you have no air blockage in the hard lines (the steel ones between the inj pump and the injectors.)

Loosen the compression nuts at the top of the steel fuel lines. Then crank the engine. If there's air in the lines, you should get bubbles in maybe 30 seconds of cranking. When the bubbles change to fuel, tighten down the compression nuts. End of priming, tractor "should" start.

//greg//






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 04-26-2005, 19:13 Post: 110382
JAMESC1212



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GREG;
TRIED THIS METHOD AND GOT NOTHING BUT BUBBLES FOR OVER 5 MIN OF CRANKING OUT OF CIL # 1 GOT NOTHING OUT OF #2 & 3 DO YOU THINK I SHOULD ORDER A NEW INJECTOT PUMP ? I DONT KNOW WHAT TO TRY NEXT. CAN YOU TELL ME HOH TO TIME A NEW INJECTOR PUMP ?






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 04-26-2005, 20:20 Post: 110388
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Might need a pump, might just need a drive gear, might just need cleaning. Remove the hard lines completely, so that you can see what's happening at the three injector pump ports - when you crank. If there are no visible problems (blockage, broken parts) AND still no fuel flow, pull the front cover and see what the drive gear looks like. It's an easier job if you remove the radiator first. I know that you said the fuel pump is delivering fuel to the injection pump, so that SHOULD mean the drive gear is ok. But you still should look to make sure.

//greg//






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 04-27-2005, 10:57 Post: 110416
affordable



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Do as Greg has suggested ,if you have no fuel coming out of the pump you will have to replace it.We have the pumps in stock,while they are not hard to replace,timing is alot more sensitive and we can walk you thru that.Let us know how it goes

Tommy
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 04-29-2005, 21:30 Post: 110519
chipuren



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 INJECTOR PROBLEMS

James,
The sediment bowl has sometimes been a source for air to enter the system, especially if the screen above it inside the tank is plugged. remove the line from the bottom of the lift (hand plunger) pump and open the valve, you may notice that fuel runs more freely at a position other than what is indicated at open. while you have this line off, check for the thimble screen and be srue it is clean.

Also be sure your injecto pump has oil in it. you fill the pump with 10w oil at the top rear of the pump unitl it comes out the fitting at the front bottom that comes with a little plastic cap over it, remove the cap for this test.

Sometimes these simple things can save more "invasive" surgery, not that I am trying to mess up my friend Tommy's sale of a new pump, but only if you really need it.






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Discussion Boards > Active Subjects > Messages as Posted > Chinese Tractors -- Jinma Farmpro Agracat Forum

Thread 110325 Filter by Poster:
affordable 2 | chipuren 1 | greg_g 6 | JAMESC1212 9 | jinma99 1 |




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