| Author |
Message |
Jim Newlin
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, November 22, 2005 - 6:50 pm: | |
Our '88 Prevost has less than 500 miles
on an inframe major. Transmission has been
re-sealed.
There is a whine amplified thru the bus. Seems
to be from the power steering.The pump is new
but Prevost had to send a replacement as the
first one we ordered was defective. We have not
driven the bus that much so are not familiar
with the creaks & squeeks it makes. Our son-in-law used it for an entertainer bus. They have
since moved on; we are becoming acquainted with
our bus for the first time.
Do not think the noise is transmission related.
Have enjoyed & learned a lot form this forum.
Thanks,
Jim |
Marc Bourget
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, November 22, 2005 - 7:58 pm: | |
I'm guessing you haven't managed to purge air out of the system introduced during the overhaul and pump replacement(s).
Warm up the bus/engine/power steering. Then jack the front wheels off the ground and with the engine running, run the steering wheel, lock to lock, go "all the way" but don't hold the wheel against the stop at either end.
After about 3-4 cycles, lock to lock, you should realize a reduction or elimination in the noise.
HTH
Onward and Upward |
Stephen Fessenden (Sffess)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, November 22, 2005 - 9:58 pm: | |
So he could just drive it and make some S turns in a big parking lot? |
Sojourner (Jjimage)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, November 22, 2005 - 11:24 pm: | |
Usually once air mix in oil to form bubble, it may several days of driving or as Marc & Stephen posted to completely remove air from oil.
Because after park awhile the bubble turn into air pocket in high point of line or tubing.
It eventually goes away later if not now.
Make sure fluid level is maintains until it stay there. Remove air will lower level. Otherwise it still making foam.
FWIW
Sojourn for Christ, Jerry |
Marc Bourget
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, November 23, 2005 - 6:53 am: | |
Steve, with the tires on the ground there will be some resistance in moving lock to lock.
Along with that weight will come more load on the system, imposing shear to the oil. This tends to disperse any air as little bubbles which will not "percolate" out as fast.
Raising the tires permits fastest transit of oil through the system achieving the least amount of air.
Experience "suggests" that this is the most expedient way. But I didn't do side by side comparisons, just a recollection from my past when I o'hauled PS pumps and gearboxes
This is not to say, at the same time, that your suggestion will not work - it does, over time.
Thanks for prompting the further explanation. |
david anderson (Davidanderson)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, November 23, 2005 - 9:40 pm: | |
Jim,
My Eagle did the same thing after a fluid/filter change. I just drove it and after a few hundred miles it hasn't done it again.
David |