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Norway · 05-03-2009, 08:03 AM

Hi!
I have a Triple E, Commander motorhome (year 2000) build on a Workhorse chassis. Yesterday I discovered a leaking valve on the power steering return line, hopefully it's OK when I put in a new O-ring. Is there anybody who can tell me the function of this valve? I have been searching the internet for an answer, but came up with nothing so fare.

wa8yxm · 05-03-2009, 11:25 AM

Looks to me more like a sensor than a valve. However I'd have to look at my power steering to tell you any more than that,, If I do not forget, I will look

kaspersr · 08-21-2012, 01:07 PM

Hi,
I have a 2001 Damon Daybreak build on a Workhorse chassis.I discovered a leaking valve ( its a valve and no sensor) on the power steering return line,I can't find the leak. I can't find the name of this part. Is there anybody who can tell me the function of this valve / the name of this valve / the partnumber?

M&EM · 08-21-2012, 02:33 PM

The part pictured by the OP looks like a FLUID FLOW SWITCH as described in the shop manual-15748848-1.
No part number given and I'm not sure I understand the function described.

Seems to be related to sensing a minimum pump hydraulic pressure below which the brake booster can function and closes the flow to the booster .

Marty

gg · 08-23-2012, 08:30 PM

Looks like a typical pressure switch. The engine control module use this to regulated idle rpm to compensate for air cond on/of load and steering pressure spike when turning into the corner stops.

wa8yxm · 08-24-2012, 08:31 AM

It is not a power steering part. this is why you folks are having so much trouble identifying it. It is a power BRAKES part.

Workhorse Custom Chassis uses the Hydrobost brake system, IN this system when the engine is running it supplies power steering pressure to the brake booster, but if the engine stops or if the power steering pump fails there is an electric pump that provides boost pressure to the brakes.

This function of the fluid flow switch is to tell the system "Engine is pumping so no need for the aux pump to kick in".

Kind of neat actually. I wondered how they did that, Figured they just used an ignition sensor but,.,, What happens if the drive belt breaks or the engine fails with ignition on? Answer, since they use that flow switch the loss of flow fires the aux motor.

Thus I have to say "Thanks for asking".