leaking diesel fuel

Forum Forums Tractor Troubleshooting leaking diesel fuel

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    • #50259
      edsmtn
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        got diesel fuel dripping under engine – likely cause

      • #50260
        DavidPrivett
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          I would first look at the low pressure fuel lines, if you find them leaking the rings on the ends that hold the fuel lines to the banjo bolt fittings can be ground off and standard rubber fuel used on the old banjo fittings with a screw type hose clamp . there might be a screen fuel filter inside of the fittings so check that out and clean as necessary.

        • #50261
          edsmtn
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            Thanks- I narrowed it down to the fuel pipe connection on the injection pump assembly to the injection assy. I don’t know if there is an o ring or some kind of gasket that is failing. I couldn’t get the screw on connector to budge. I guess I’ll try some penetrating oil since I don’t dare use heat with the diesel fuel the next time I get back to it.

          • #50262
            edsmtn
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              does diesel fuel leaking from the top of the diesel fuel pump with tight connections mean it needs to be replaced — 2004 yangdong y385t diesel engine in jinma 284

            • #50263
              DavidPrivett
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                I would say if the leak is just weeping no ,if you are getting a spray of fuel then it just needs to be fixed, I do not know about that pump but many use copper compression washers to seal those injector tubes. do not use teflon tape ,it can not handle those pressures. If you got a diesel injector pump repair around they might be able to help you out. Some of these pumps are bosch clones so parts might be easy to get.

              • #50264
                edsmtn
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                  I was able to disconnect the fuel line at the injector – no fuel. I have fuel in the fuel pump -it leaks when cranked but none at the injector so I guess the fuel pump isn’t working and needs to be replaced. Any ideas?

                • #50265
                  DavidPrivett
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                    do you just have a leak or the tractor will not start?? If it runs ,tighten fuel lines ,start tractor, carefully crack open fuel lines one at a time at injector,you should have fuel there then. If you do not have fuel at injector then I would say pump needs work or replacement.

                  • #50266
                    NuJinma
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                      You may have a bigger issue. I eventually had to replace my injector pump. It started with fuel leaking out what I assume was an overflow on the injector pump. (brass colour.)  It did last about 30 hours with it leaking though.

                    • #50267
                      NuJinma
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                        Here is my issue. Perhaps different from yours.

                        YangDong 380: heavy diesel leak from Injector pump.

                      • #50268
                        edsmtn
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                          fuel seeping out of top of injector pump when cranked but none at the injector so it doesn’t start. It seems like the pump needs replacing. I don’t mind replacing it if it needs doing but don’t want to bring in diesel mechanic if it’s not going to solve the problem.

                        • #50269
                          DavidPrivett
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                            have you ever looked at or changed the oil in the injector pump,it might be a good idea to drain it and see if it is dry or full of diesel or has oil in it. If it is dry then get new pump ,I would not bother trying to get it fixed. if it has diesel or oil in it a refresh is possible if you have a qualified shop around to look at it. but you will need to run a cost estimate to see if a repair will save you over a new pump. I have a y380 so I will like to hear of what you come up with as to sourcing or repairing the pump.

                          • #50270
                            DavidPrivett
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                              have you ever looked at or changed the oil in the injector pump,it might be a good idea to drain it and see if it is dry or full of diesel or has oil in it. If it is dry then get new pump ,I would not bother trying to get it fixed. if it has diesel or oil in it a refresh is possible if you have a qualified shop around to look at it. but you will need to run a cost estimate to see if a repair will save you over a new pump. I have a y380 so I will like to hear of what you come up with as to sourcing or repairing the pump.

                            • #50271
                              edsmtn
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                                not sure how to check and drain oil from injector pump – please advise

                              • #50272
                                DavidPrivett
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                                  on my y380 ‘s pump there is two drains ,one on either side of the smallest diameter of the pump. so remove both to completely drain oil from pump. remove the mushroom shaped vent on top of the pump ,at this point oil should run out of bottom of pump, it would be a good idea to catch it in a clear glass jar to inspect it. If all looks good use engine oil to refill. There is a bolt in the side of pump that is your oil level . these pumps do not use much oil and the fill at a slow rate, so  over filling is possible so leave side fill bolt out for a few min. before capping it off. If on inspection where oil should be is dry a new pump or repair will be necessary, if there is diesel where oil should be the pump is on its way out, but frequently done oil changes of the pump can extend its life for awhile.

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