Getting fuel in the crankcase oil

Rob Roll

New User
I have a case 580c Backhoe/loader with a case 207 Diesel engine and having problems, getting fuel in the crankcase.
Had the injector pump rebuild and installed all new injectors. Engine seems to run ok and has no blow by.
Anyone have any ideas what coul be the issue???
 
The seal between the pump and crankcase is leaking. It is not the injection pump. The seal is in the pump drive.the parts are less than 50 bucks.(I Just did a 1456 IH with the same issue). There are two seals and a couple of Orings.You will have to pull the pump to get to the seals. And the little front cover over the pump drive needs to come off to get to the pump drive.
 
Probably rolled over the rear rubber cup shaft seal that rides inside the pilot tube on that pump application. Could also be the brass pilot tube ID is worn/scored at the rear seal area. Was a new brass tube epoxied in the housing when the pump was repaired? Trick to know if the rear seal is in place right, pump will slide over the lubed seal easily. If the pump needs lots of effort to get to the timing gear case, it's most likely rolled over. Most all pumps I see in for repair need a new tube due to seal wear inside.
 
(quoted from post at 22:35:20 10/17/18) Does that engine have a cam operated transfer pump. I have seen them leak.
No.
He roll the umbrella seals over just like Dieseltech said.
Very easy to do even if your lucky enough to have the proper tools.
Tom
 
Thanks most of the ones I worked on. Had lift pumps. The larger ones had electric pumps. When we had fuel in the oil that was the first thing we checked.
 
I should have added it was not work done at our shop but by those who wanted to save money on labor and did not know what they were doing,, easy to roll one if you have not ever changed one
 
(quoted from post at 01:06:35 10/18/18) The seal between the pump and crankcase is leaking. It is not the injection pump. The seal is in the pump drive.the parts are less than 50 bucks.(I Just did a 1456 IH with the same issue). There are two seals and a couple of Orings.You will have to pull the pump to get to the seals. And the little front cover over the pump drive needs to come off to get to the pump drive.

Is there a way to check this???
Had the pump rebuilt and shop replaced these seals and bushings.
 
Pump will need to come off. If the shop epoxied in the bushing per Stanadyne instructions AND rear seal is rolled then I'd say it's the seal. If the brass pilot tube was sealed with some other method there's a good chance fuel leak is BETWEEN the housing bore and tube OD. A pressure test would show that with a test shaft with seal installed in the tube. There should be NO air bubbles on the tube OD. I only use the two part epoxy as the service tubes are loose in the housing bore. I also modify the pilot tube bevel so the rear seal enters easier.
 
(quoted from post at 09:19:44 10/18/18)
(quoted from post at 01:06:35 10/18/18) The seal between the pump and crankcase is leaking. It is not the injection pump. The seal is in the pump drive.the parts are less than 50 bucks.(I Just did a 1456 IH with the same issue). There are two seals and a couple of Orings.You will have to pull the pump to get to the seals. And the little front cover over the pump drive needs to come off to get to the pump drive.

Is there a way to check this???
Had the pump rebuilt and shop replaced these seals and bushings.
Did you pull the shaft out of the gear and give him a complete pump?
Some people pull the pump and leave the drive shaft in the gear.
Then when they reinstall the pump they usually mess up a seal.
Most IP shops won't work on this type pump without the shaft.
Tom
 

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