Power steering questions

[Mike Hohnstein]

Keep in mind, you can't really over size the return line to the pump and a
auxiliary reservoir close to the pump would be a worthy modification, as would a
cooler.
MH
----- Original Message -----
From: Dan Darst
To: WanderlodgeForum@yahoogroups.com
Sent: Sunday, November 26, 2006 11:12 AM
Subject: RE: [WanderlodgeForum] Power steering questions


In October I was messin with the power steering. In the span of a week, I
went from Dexron III to straight 30w to mobil 1 10w30 fully synthetic and
finally back to straight 30w. The manaual lists straight 30w as one of the
acceptables. Also changed suction line and return line. The old original
lines were 5/8" heater hose. Go to http://www.discounthydraulichose.com, they sell
what you need. It is made by aeroquip, and has no steel braid, but is quite
stiff so it won't collapse. They also sell the nylon chafe protection that
slips over the hose. I won't be tripping until March (Myrtle), so no
conclusions until then. The suction hose connection (new hose) to the pump
is dripping now, and it will drip for the next four months. After I put some
initial heat to it, I will again tighten the hose clamp. In about a year, if
I find the pump needs to be rebuilt, will also try to change that suction
line fitting on the pump so it points up instead of to the rear, thereby
eliminating the need for the hose to do a 180 degree bend.

dandarst86fc35rbhuntleyil.

>From: "davidkerryedwards"
>Reply-To: WanderlodgeForum@yahoogroups.com
>To: WanderlodgeForum@yahoogroups.com
>Subject: [WanderlodgeForum] Power steering questions
>Date: Sat, 25 Nov 2006 23:32:39 -0000
>
>I'm finally getting around to fixing the power steering leak I've had since
>I bought the
>coach. A perusal of all the maintenance records from new show it to be
>a persistent
>problem reported first in about 1983 or 4. It has barbed fittings for
>suction and return
>lines. Suction fitting on Eaton power steering pump has one hump instead of
>barbs, like a
>heater core. Suction line has been replaced at least once, could be 2 or 3
>times. Current
>suction line is steel reinforced hose. Return line is original (I think) It
>is leaking at all
>suction and return line fittings. Not leaking on high pressure line.
> I put my non-contact thermometer on the reservoir after about a 10
>miles drive on a
>75 degree day and it showed 239 degrees. Typical power steering runs at
>150 degrees.
>So the Bird power steering fluid is clearly too hot. How to fix?
> I plan to replace the hoses with high temperature hose (Gates rubber
>sells one rated for
>300 degrees) and try to replace all barbed connections with threaded
>connections, except
>for the barb on the suction line at the pump since that fitting is not
>removable. I will also
>use synthetic fluid rated for higher temperatures.
>Would the steel reinforcing in the current hose mean it could not make a
>good seal on the
>barbed fitting? The original return line is all rubber.
>How much of a temperature drop could I expect in the fluid if I installed a
>cooler in the
>system? What is the difference in cooling ability of the tube/fin versions
>with an electric
>fan, tube and fine with no fan, and solid aluminum coolers with no fan but
>a row of fins?
>How exposed to air movement must these coolers be to be effective? Any
>recommendations on a good location?
>I considered moving the reservoir to a cooler location but I haven't been
>able to find a
>location on the bus higher than the power steering pump which will work.
>Any advice on how to deal with the problem. I've got the reservoir out,
>the suction line
>removed and will pull the return line in the near future.
>

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