level system

[Jerry Carr]

I have both air and jacks on our '06 Pat. The problem I have is my air operates fine, but then will not keep the pressure up in the air bags. How can I locate the 12 volt fuse or is the air pump bad??
I have never heard the small pump run, I would like to check the fusing as the would be a lot less work then getting under the rig!

I do have an extended warranty, so if the pump is bad I may just use the service center for the repair.

[Gerald Farris]

Jerry,
To properly diagnose the auxiliary air compressor for the air leveling system you will need to access the compressor. This means that you will need to get under the coach. There is no way to diagnose an inoperative leveling system auxiliary compressor without working actually doing something to check the system, otherwise you are just guessing. The compressor fuse on most of these systems is located near the compressor.

Gerald  

[Jerry Carr]

Ok Gerald, I will take a look.  I just thought the fuse would be a good starting point.  It sounds like I have an in line fuse near the pump.

[Ron Rowe]

Jerry

I have a '06 Patriot and have just had the pump replaced (it is between the drive wheels).  I had the same problem as you have, and also had never heard the pump run.
Massey Diesel in Phoenix did the job.

Ron

[Jerry Carr]

I did get under the rig this morning and checked for power.  That was not the issue, so I think it's the pump.  I will let it go until I get up to Bend and then have it replaced.  I never did find a fuse at the pump location, which I had hope to just replace it. The pump terminals had 12 Volts, so I would have thought a fuse would blow for safety reasons.

I didn't pull the pump, but its really a poor design.  Open fields so all the road and oil go into the motor.  This is not the best program offered!



 

[Gerald Farris]

Jerry,
Obviously your compressor does not have a bad fuse if you have 12V at the compressor. A bad electric motor in an automotive application usually does not blow the fuse because the problem with the motor is normally an open circuit and not a short to ground.

When you replace the compressor, you may want to replace it with a compressor that has a sealed motor like a Viair unit instead of the open design unit that Monaco used. An electric motor that is open to dirt and water from the road, will not last

You may be able to clean the brushes an commutator ring in the compressor motor and get it to working, however unless it is sealed, it will not last.

Gerald

[Jerry Carr]

Thanks Gerald for your help, I did change out the HWH air compressor yesterday and installed the Viair 350C. The Job required that I remove the old unit 4 bolts 1 ele. connection and one air line.
I then mounted the new pump on the mounting plate by drilling 4 new holes plus one hole for a ground wire. I cut the old pump wires at the pump and used the lead wires for the new relay.

I used a 12 volt relay for supply power the new pump needed a minimum of 20 amp so I ran a new power supply line from the rear panel hot bus with an in line fuse. I then finished the hook up to the relay the new supply on the 30 pin and the pump on the 87 the old pump wire connections on the remaining relay pins.

Every thing seems to be working great.