Lin (65.184.0.189)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, April 07, 2002 - 1:34 am: | |
Ever since my power steering was installed, it has emitted a humming sound. One mechanic told me to drain the transmission fluid in the system and use hydrolic oil instead. Another told me to plumb an air cushion into the system to absorb the flutter of the valve in the pump. Does anyone have any ideas on this?
Thanks |
Tom Caffrey (Pvcces) (12.146.33.164)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, April 07, 2002 - 11:21 pm: | |
Lin, you don't say what you've got or how long you've had the problem. It's not uncommon to have some problems before all the air is out of the system.
One reason that steering pumps are usually vane pumps is because they are quiet running. It sounds like you should run down the cause before making repairs.
Ordinarily, the steering valve and the relief valve should not cause any noise when idling or steering straight ahead.
If you have a flow control valve, I wouldn't expect that to make any noise unless the engine was turning fast.
These busses can be troublesome to get all the air out. Unless I was absolutely sure that the system requires air, I would be trying to make sure that there was none at all in the system.
Noise in hydraulic pumps often is from cavitation which comes from an air void or vacuum void. The vacuum void is most likely to damage a pump. It is usually caused by high RPM with cold oil.
FWIW
Tom Caffrey PD4106-2576 |