Hyd oil in crankcase - Technical Troubleshooting discussion in Forkliftaction's forums

Cat Lift Trucks (& Caterpillar) V90E:
Hyd oil in crankcase

I have a customer with a perkins 4 cyl gas motor in a V90E
that is leaking hydraulic oil into the crankcase. It was brought to my attention that there may be more than one pump connected to the motor,a second one for running the power steering and that the main hyd pump may not be the cause...has anyone run into this before?..thanks

Posted 21 Aug 2008 12:17
Discussion started by andy_f
British Columbia, Canada

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We had a Cat with a Perkins and it was the hydraulic pump. Pump faulty, causing movement on the output shaft and wore the seal and bushing out. Had to replace the whole pump. Not a very big job, parts were reasonable

Posted 4 Sep 2008 22:00
Reply by Prentice
Ontario, Canada

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only if the hyd pump has a hair line crack under the silent chain cover causing engine to fill with HYD oil how fast does it fill the crank case and multiple pumps is only on electric trucks or large trucks

Posted 4 Sep 2008 19:46
Reply by dantheman
New Hampshire, United States

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