Hi all, I am new to the forum and hoping you can help me with a problem I have with a Siromer 30HP (for Siromer read Jinma) with a Y385 engine.
I have read through a lot of the posts and replies on this site and you all seem to be a very knowledgeable bunch of folks, here's my problem:
The tractor has been working well for about 5 years (about 1000 hours, clock packed up at 200!) with the exception of overheating in the summer when using a flail mower. Recently the engine stop rod inside the fuel injection pump governor lightly seized closed which meant the engine would not start (yes there was oil in the pump). I had to remove the pump to be able to open up the governor assembly and free it off, no big deal and it all works fine with no corrosion etc. The real problems started when I put the pump back on the engine.
After initially getting the pump timing 180 degrees out I finally got it timed in and it starts (with difficulty to say the least). Lots of cold cranking and it eventually fires into life with lots of blue/grey smoke and knocking - it will rev but eventually dies out at idle and is a rough as a Badgers bum. I have cleaned all the strainers; tank, banjo bolts and changed the fuel filter and double checked all the low pressure fuel lines but to no avail.
I suspected the injectors (new ones on order) but I am not convinced they are faulty now, each time I loosen the fuel pipe on each injector the engine note changes onto 2 cylinder running and the knocking reduces, more so on the front cylinder, but each cylinder does seem to be playing its part. The more I think about it I suspect it is air in the system especially as I can now see very tiny bubbles circulating round the fuel bowl when the engine is running. Could there be a leak on the lift pump? When I unscrew the plunger and pump it, some fuel comes out round the shaft and it does not seem to pump fuel back to the tank as well as I remember it doing when I ran out of fuel a couple of years ago and had to re-prime the pump. Could this leak air into the system and cause the problem I am seeing?
All advice welcome
Guy
I have read through a lot of the posts and replies on this site and you all seem to be a very knowledgeable bunch of folks, here's my problem:
The tractor has been working well for about 5 years (about 1000 hours, clock packed up at 200!) with the exception of overheating in the summer when using a flail mower. Recently the engine stop rod inside the fuel injection pump governor lightly seized closed which meant the engine would not start (yes there was oil in the pump). I had to remove the pump to be able to open up the governor assembly and free it off, no big deal and it all works fine with no corrosion etc. The real problems started when I put the pump back on the engine.
After initially getting the pump timing 180 degrees out I finally got it timed in and it starts (with difficulty to say the least). Lots of cold cranking and it eventually fires into life with lots of blue/grey smoke and knocking - it will rev but eventually dies out at idle and is a rough as a Badgers bum. I have cleaned all the strainers; tank, banjo bolts and changed the fuel filter and double checked all the low pressure fuel lines but to no avail.
I suspected the injectors (new ones on order) but I am not convinced they are faulty now, each time I loosen the fuel pipe on each injector the engine note changes onto 2 cylinder running and the knocking reduces, more so on the front cylinder, but each cylinder does seem to be playing its part. The more I think about it I suspect it is air in the system especially as I can now see very tiny bubbles circulating round the fuel bowl when the engine is running. Could there be a leak on the lift pump? When I unscrew the plunger and pump it, some fuel comes out round the shaft and it does not seem to pump fuel back to the tank as well as I remember it doing when I ran out of fuel a couple of years ago and had to re-prime the pump. Could this leak air into the system and cause the problem I am seeing?
All advice welcome
Guy