Gene Davis (Ga.)
Well-known Member
Good evening people.
Some of you may remember me posting about my friend looking at the 750 John Deere 4wd tractor with the 3 cylinder Yanmar diesel engine. Well, he bought it from the Mexican guy and it is in fair condition except for some wiring that has been butchered. It will not start the first time of the day unless you spray it with staring fluid and that is how he loaded it on his trailer to bring it to his home. Once started like this it seems to start okay the rest of the day till you leave it overnight and then you have to do this all over again.
I started looking at the fuel system today and this is what I have found/done so far. Cleaned and refilled tank with new fuel. Changed the sediment bowl and replaced the filter inside it, also replaced the fuel line from sediment bowl to injection pump. This is a gravity fed system w/ no visible fuel transfer pump. I bled the lines all the way to the injection pump. There is a full steady stream w/no bubbles from the 5/16 fuel hose at the injection pump. I loosened the injector lines on top of pump and when turning it over with the starter a very small amount of fuel seeps out of the connection but none at the injector end of the lines I looked into the inlet place where it connects to the injection pump and I don't see any screen or filter in there. What is strange is that the previous owner has been cranking it w/start fluid for about a year now and it runs all during the day even restarts if stopped but will not start the first time from an overnight stop. This is the injector pump that mounts in the front gear cover and has the 3 lines coming ot the top to the injectors. Is there a lift pump inside this type unit or what? It sounds like I may be needing to find a pump rebuilder for him maybe. Thanks for listening.
Gene Davis Tennille, Ga.
Some of you may remember me posting about my friend looking at the 750 John Deere 4wd tractor with the 3 cylinder Yanmar diesel engine. Well, he bought it from the Mexican guy and it is in fair condition except for some wiring that has been butchered. It will not start the first time of the day unless you spray it with staring fluid and that is how he loaded it on his trailer to bring it to his home. Once started like this it seems to start okay the rest of the day till you leave it overnight and then you have to do this all over again.
I started looking at the fuel system today and this is what I have found/done so far. Cleaned and refilled tank with new fuel. Changed the sediment bowl and replaced the filter inside it, also replaced the fuel line from sediment bowl to injection pump. This is a gravity fed system w/ no visible fuel transfer pump. I bled the lines all the way to the injection pump. There is a full steady stream w/no bubbles from the 5/16 fuel hose at the injection pump. I loosened the injector lines on top of pump and when turning it over with the starter a very small amount of fuel seeps out of the connection but none at the injector end of the lines I looked into the inlet place where it connects to the injection pump and I don't see any screen or filter in there. What is strange is that the previous owner has been cranking it w/start fluid for about a year now and it runs all during the day even restarts if stopped but will not start the first time from an overnight stop. This is the injector pump that mounts in the front gear cover and has the 3 lines coming ot the top to the injectors. Is there a lift pump inside this type unit or what? It sounds like I may be needing to find a pump rebuilder for him maybe. Thanks for listening.
Gene Davis Tennille, Ga.
