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Tires, Wheels, Brakes, Steering and Suspensions Discussion of preventative/corrective maintenance and other technical issues regarding your coach's Tires, Wheels, Brakes, Steering and Suspensions and related components.

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  #1  
Old 10-12-2019
pauleburgess pauleburgess is offline
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Default Help! Air not building

In storage lot.
Turned engine on , air built to 120, blew off a few times as I was checking and adjusting tire pressure. Today is go to pine mountain day.
Got to wheel #4 and heard the 120psi blow off that sounded weird a little... maybe storage buildings reflecting sounds. But no, air pressure going down with wvery use, and not building back up. Low air light on at 90psi. Also, engine oil pressure gauge pegged at zero, which is a new symptom, I think separate.

Paul
Text 832.816.5825 and i will call back from whichever phone has more juice.
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1986 PT-40
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  #2  
Old 10-12-2019
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atckip atckip is offline
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Has the coach been sitting Paul? Check the simple stuff first. Rock the suspension switches on the dash or even bumping the bus forward might free a stuck valve. If it's building to 90 lbs I wouldn't think it's a bag. Can your hear a big leak somewhere?
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Old 10-12-2019
pauleburgess pauleburgess is offline
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[QUOTE=atckip;467055]Has the coach been sitting Paul? Check the simple stuff first. Rock the suspension switches on the dash or even bumping the bus forward might free a stuck valve. If it's building to 90 lbs I wouldn't think it's a bag. Can your hear a big leak somewhere?[/QUOT

sat for a week. Ran every other day. Built up to 120, but now there seems to be no compressor output... So as i use that 120psi i get no new air in the tanks.
Governor is apart at the moment. With engine on no air coming out of the governor, whether or not i am pushing on the shuttle inside it.
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  #4  
Old 10-12-2019
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Unloading valve in compressor???
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  #5  
Old 10-12-2019
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Could also be a blown line between the compressor and the dryer. You can't hear the leak over engine noise. Been there. Will it air up from shop air?
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  #6  
Old 10-12-2019
pauleburgess pauleburgess is offline
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Quote:
Originally Posted by Chap View Post
Could also be a blown line between the compressor and the dryer. You can't hear the leak over engine noise. Been there. Will it air up from shop air?
Dont have shop air access right now.
May be going to get one... Can i air up through the shraeder stem in the engine compartment?
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Old 10-12-2019
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Quote:
Originally Posted by pauleburgess View Post
Dont have shop air access right now.
May be going to get one... Can i air up through the shraeder stem in the engine compartment?
Yes you can.
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Chap and Darra Enfinger
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1986 PT40 8v92
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Old 10-12-2019
pauleburgess pauleburgess is offline
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If i drop the air dryer cartridge and run the beast, i should get air out of the dryer housing, right?
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Old 10-12-2019
pauleburgess pauleburgess is offline
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So glad this happened here as opposed to on I-10 with thw whole family on board....
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Old 10-12-2019
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Quote:
Originally Posted by pauleburgess View Post
If i drop the air dryer cartridge and run the beast, i should get air out of the dryer housing, right?
It's a straight shot from the compressor to the dryer. Randy and Mark B helped me replace that line on my coach.
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1982 FC33 (sold)
1986 PT40 8v92
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