Greetings all. I have a 1985 M4050 and I am seeing fuel in the Crankcase. Suspecting maybe a bad injector. Is there a way to isolate which one(s) is the culprit?
Thanks
Thanks
M4050 Fuel in Crankcase
- Thread starter TomF
- Start date
I read that some tractors with lift pumps run off the cam can have a bad diaphragm and leak diesel into the crankcase. I believe my b7800 has that system
If in fact it is diesel most likely it is the small fuel lift pump. Your tractor has a CAV type injection pump. It is not uncommon for them to leak fuel into the crankcase as well. I would doubt that it is an injector. The other common problem is getting hydraulic oil into the crankcase by way of the front seal in the hydraulic pump. Generally you can disassemble the lift pump and look at the diaphragm until if it has a hole in it. Great old machine.
As it turns out, there was no issue to address. I had noticed that the oil level seemed to be going up on the dipstick and suspected fuel in the crankcase. I know that when I run the bush hog that the tractor uses a little oil. My brother-in-law was in town and I had showed him how to operate the bush hog and he had been doing a little around the land. I didn't realize that he had added oil after he was done, thus explaining why the level on the dipstick seemed to be rising. Unfortunately, this didn't dawn on me until AFTER I had removed the fuel pump and disassembled it and inspected the diaphragm, which was fine. needless to say, I felt a bit sheepish when I confirmed what was going on. After reinstalling the pump, had to bleed air out of the system to get the tractor to start. Once that was done, everything seems to be fine.
Thanks again for those who posted!
Tom
Thanks again for those who posted!
Tom
