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Tag Axle Won't Lift

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#1 mmulvenna

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Posted 28 July 2013 - 02:07 PM

Hello,

 

We have a 2004 42'  Monaco Dynasty with a tag. Recently the Tag started to not lift when I press the tag lift switch left of the drivers seat. I have verified that I have 12 v to the air valve that releases the air from the tag so it will lift. I can hear some air being release but the tag does not raise off the ground.

 

Any ideas on what might be wrong or what to check  will be greatly appreciated. Is there a way to verify that the air valve is function properly? This is separate  valve from the one that adjusts the down pressure of the tag.

 

Thanks

Mike


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#2 hermanmullins

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Posted 28 July 2013 - 03:45 PM

Mike, If you can locate the valve, check the exhaust port. The same type valve is used for dumping the air. I found one of mine clogged by Dirt Dobbers.

 

Hope this helps,

 

Herman


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"Fair winds and Following Seas"

Herman & Bobbie Mullins, F302225
Whitewright, TEXAS
'02 Monaco Dynasty, 40-foot 400 HP ISL
Chevrolet Silverado (M & G air brakes)
U.S. Navy PR-3 1956 to 1964

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#3 mmulvenna

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Posted 28 July 2013 - 04:40 PM

Thanks, Herman.

Yes, I read that post but can't seem to locate the valve. I will do some checking to try to locate.
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#4 DickandLois

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Posted 28 July 2013 - 04:47 PM

Mike,

 

The valve that Herman is referring to is the MAC valve in the area of the rear air manifold.

 

The Valve should get power (12 volts) from a black wire running from the Tag axle control switch. Should you measure 12 volts at the Valve, make sure you have a good ground on the other terminal. There might be a 7.5 amp fuse bad in the ACC / ING fuse box.

 

Everything is tied into the ride height control system so if that is working, the problem is most likely Mud Dobbers.

Herman! that is what the Northern boys call um.

 

The supply air line is Green and the output from the Mac valve to the tag is Orange, that is what the drawings say. That might help find the valve.

 

Rich.


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#5 hermanmullins

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Posted 29 July 2013 - 01:41 PM

One more thing. I found a small filter to go on my valves. Can't recall what it is called but it was round about 1" long with 1/4 npt threads on one end. It looked like small brass beads compressed together.

 

Herman


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"Fair winds and Following Seas"

Herman & Bobbie Mullins, F302225
Whitewright, TEXAS
'02 Monaco Dynasty, 40-foot 400 HP ISL
Chevrolet Silverado (M & G air brakes)
U.S. Navy PR-3 1956 to 1964

Southern Region Vice President for Six-State Rally Association
Lone Star Chapter FMCA Past President
South Central Lucky Rollers
Rally in The Pasture


#6 mmulvenna

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Posted 30 July 2013 - 12:02 PM

Thanks all, yes there is 12 volts to the valve (solenoid looking) next to the tag down Pressure gauge, green air line in and orange aite line out. Will trace the orange to see where it goes. 


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#7 desertdeals69

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Posted 30 July 2013 - 01:45 PM

Remove the valve and see if the tag raises.


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#8 DickandLois

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Posted 30 July 2013 - 03:11 PM

Does the tag Axle go down properly? Enough to support some of the coach weight?

There could be an air leak at some point! should the air lines pass through the frame rail(s) look closely for any chaffing / ware to the line at that point and like Herman mentioned, check the MAC vent port for obstructions.

You mentioned that you had 12 volts to the Valve, have you checked the ground connection?

 

Rich.


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#9 HarveyWhite

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Posted 31 July 2013 - 02:24 PM

Does the tag really pick up off the ground? I'm new to having a tag just bought a Tiffin with a tag and it says dump.

 

I've never gone back to see if it is off the ground I just figured it let off the air to help you make tight turns.


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#10 DickandLois

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Posted 31 July 2013 - 07:29 PM

Harvey,

 

The tag axle can be raised and lowered. To change the load the axle is carrying, to being lifted off the road. When lifted off the road surface the drive tires have better traction and as you mentioned it helps make sharp turns with out the tires scuffing across the surface.

 

Rich.


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#11 HarveyWhite

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Posted 02 August 2013 - 04:23 PM

Rich,

 

I'm thinking it may I'm sure going to check that out the next time I have the coach out of the barn. all the switch by the driver says is tag dump.

 

So I will check it out.


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