Liviu Popescu
Well-Known Member
Hi all. We have some issues with our wheel loader, CAT 950F Series II. From what I can tell they are hydraulic over hydraulic brakes. Serial number is 8TK01037.
There is a strange noise coming from around the accumulator charge valve. It started happening immediately after we replaced the orange hose (was originally a steel line), it connects the accumulator charging valve to the pressure reducing valve. Back then it only happened once a month and would go away when you pressed the brakes.
Then we replaced the pink/blue line with a hose which connects the pressure reducing valve to a manifold which I think connects to the brakes.
Our operator seems to think it’s air but from what I’ve checked on the SIS there is no way to remove the air as it runs of the main hydraulic pump so should be sorting it out itself.
Before the pink line replacement, we changed the main valve group(as it cracked) and then hydraulic oil but haven’t worked with the machine since.. just started this week.
Brakes work ok but we’re worried for the noise. Noise goes away briefly when you press the brakes.
Unfortunately, we have no pressure test equipment as never had any issues with these machines.
If anybody has any ideas/suggestions it would be of great help.
I’ve uploaded a short clip on youtube maybe someone recognizes the sound (please let me know if it doesn’t work).
https://youtube.com/shorts/wK-5ZLEa9Xo?feature=share
Many thanks,
Liviu
There is a strange noise coming from around the accumulator charge valve. It started happening immediately after we replaced the orange hose (was originally a steel line), it connects the accumulator charging valve to the pressure reducing valve. Back then it only happened once a month and would go away when you pressed the brakes.
Then we replaced the pink/blue line with a hose which connects the pressure reducing valve to a manifold which I think connects to the brakes.
Our operator seems to think it’s air but from what I’ve checked on the SIS there is no way to remove the air as it runs of the main hydraulic pump so should be sorting it out itself.
Before the pink line replacement, we changed the main valve group(as it cracked) and then hydraulic oil but haven’t worked with the machine since.. just started this week.
Brakes work ok but we’re worried for the noise. Noise goes away briefly when you press the brakes.
Unfortunately, we have no pressure test equipment as never had any issues with these machines.
If anybody has any ideas/suggestions it would be of great help.
I’ve uploaded a short clip on youtube maybe someone recognizes the sound (please let me know if it doesn’t work).
https://youtube.com/shorts/wK-5ZLEa9Xo?feature=share
Many thanks,
Liviu