thwaites 7000 sump oil rising dramatically

grumpi-g · Post #1 by **grumpi-g** » Thu Apr 23, 2020 8:57 am

the sump oil level is rising dramatically, is it possible for the hyd oil to leak into sump from hyd pump shafts seal on lister ts3 engine.

Post #2 by **Jeremy Rowland** » Thu Apr 23, 2020 12:58 pm

Graham, if oil rises in a diesel engine it can only be either hydraulic oil, diesel fuel oil, or power steering oil, while in this instance as there is no power steering pump then it can only be diesel or hydraulic oil.
With external fuel return it is unlikely to be diesel oil, how easy is it to remove the hydraulic pump, drain the engine oil and put fresh oil in then run the engine and see what happens?
Hope that helps.

Jeremy

FOWLER MAN · Post #3 by **FOWLER MAN** » Thu Apr 23, 2020 10:47 pm

Hi,
This engine is fitted with a diaphragm type lift pump, :think:

That could be passing fuel into the oil if the diaphragm has failed.
Fred

essexpete · Post #4 by **essexpete** » Thu Apr 23, 2020 11:53 pm

Is the oil as thin as water?

cobbadog · Post #5 by **cobbadog** » Fri Apr 24, 2020 8:33 am

Sounds like a diaphram has a split in it to me. What are your oil levels like? Has the hydraulic levels dropped? If not pull the fuel pump and put a kit in it and as suggested drop the sump oil and replace as it is now thinned with diesel.

Post #6 by **Jeremy Rowland** » Fri Apr 24, 2020 10:07 am

FOWLER MAN wrote:Hi,
This engine is fitted with a diaphragm type lift pump, That could be passing fuel into the oil if the diaphragm has failed.
Fred

Thanks Fred I forgot that way in for fuel. :thumbup:

Jeremy

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