Hydraulic gear pump advice

[tanner5340]

Hi,

I keep getting large amounts of transmission/hydraulic oil in the engine oil, the only place it can enter the sump is through the connection between the engine and hydraulic pump.

I have replaced the shaft seal on the hydraulic pump twice with a non genuine seal that was matched up at a local seal specialist.

The question I have is: is it possible for the gear pump to wear internally enough that it over pressurizes the shaft seal?

NB: I have replaced the pumps 'E' seals as well, I'm wondering if the high pressure oil can pass through the gears.

 

[Eagleview]

Yes they can force oil out of the seal and even dislodge the seal if there is enough internal leakage . Is there ANY wear in the housing or end plates where the gear have been touching them ? New Italian group 1 and 2 pumps are around $150 on ebay . Group 3 are around $400-$500 .

 

[DLTTrekkers]

Hallo new pump.......do not wast time on old pump or replacing seals in old pump