743 BobCat

[DER]

I have a 743 that is getting air in the hyd. system. The tank shows air bubbles. The Equipment Pump cavitates when the arms are raised or lowered which is when the air bubbles show up in the tank. The pump was sent out and it is ok. I have a Harley Power Rake, and the Equipment Pump sounds fine when the Power Rake is operating. The seals on the trunion/pintle were replaced. I have completely power washed the unit and can not find a leak anywhere except the lift cylinders. The hyd. filter and fluid was also changed. Please Help Don

 

[Tazza]

Does yours have the square block on the hydraulic pump? or a big fat hose that runs to a block on the left?

 

[DER]

Does yours have the square block on the hydraulic pump? or a big fat hose that runs to a block on the left?

Big Hose