uffex
Senior Member
Good day jon
I read your thread and drawn the following conclusion the excessive case drain reacts against the slippers, if the piston have less force that high pressure can lift the slippers loosing there respective location - so the fault is not that of the motor but some inherent fault with the 320 machine. When an excavator stands on top of a spoil heap lowers the boom casts the arm out and rolls the bucket the maximum flow of fluid is generated going back to tank and the highest return pressure combine this as you swing around adds up in my mind. This is the most economical way to shift dirt and must be a common phenomena for the 320, indeed that makes sense since you are not the only guy to have the hose moved suggests this is a known issue at Cat service. If moving the hose prevents those high case drain pressures I would suggest leave it be.
I find it extraordinary given those high drain pressures that seals have not blown out.
Kind regards
Uffex
I read your thread and drawn the following conclusion the excessive case drain reacts against the slippers, if the piston have less force that high pressure can lift the slippers loosing there respective location - so the fault is not that of the motor but some inherent fault with the 320 machine. When an excavator stands on top of a spoil heap lowers the boom casts the arm out and rolls the bucket the maximum flow of fluid is generated going back to tank and the highest return pressure combine this as you swing around adds up in my mind. This is the most economical way to shift dirt and must be a common phenomena for the 320, indeed that makes sense since you are not the only guy to have the hose moved suggests this is a known issue at Cat service. If moving the hose prevents those high case drain pressures I would suggest leave it be.
I find it extraordinary given those high drain pressures that seals have not blown out.
Kind regards
Uffex