Author Topic: Scenic Repairs  (Read 1306 times)

Offline tuccitown

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Scenic Repairs
« on: March 02, 2015, 11:49:33 AM »
As I work through my list of items to make the Scenic road worthy and usable for the summer. First item I'd like to get to is the air systems both brake and suspension. I hear air leaks but no  major leaks that would prevent the rear of the coach to not air. Da book shows that the rear axles are supplied from the auxiliary tank, the front is airing fine so I would assume that the aux tank is getting air.

Any ideas what would cause the rear to not air without a major air leak?

Thanks,


Jack
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1979 GMC H8H649-053 Conversion in progress.
1955 GM PD 4501-377 Converted.
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Offline luvrbus

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Re: Scenic Repairs
« Reply #1 on: March 02, 2015, 12:14:33 PM »
How much air pressure are you making it may not be enough to open the shuttle valve to fill the other tanks,they usually open around 90 to 100 lbs on a single air system on older buses 
« Last Edit: March 02, 2015, 12:28:43 PM by luvrbus »
Life is short drink the good wine first

Offline tuccitown

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Re: Scenic Repairs
« Reply #2 on: March 02, 2015, 01:39:19 PM »
Great point, thank you I think it's only getting up to about 80 psi. I will double check what it gets to. Will be much easier to get it up on the ramps with air in it.

Thanks again,

Jack
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1979 GMC H8H649-053 Conversion in progress.
1955 GM PD 4501-377 Converted.
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Offline MightyThor

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Re: Scenic Repairs
« Reply #3 on: March 02, 2015, 03:55:13 PM »
I would also consider if your leveling valves are passing air,  My Rears were working initially, but the front had an issue and when I replaced it with the first aftermarket unit, no joy.  finally got a simple one that worked, then when I got the bus home, the fronts stay up for many days, but the rears leak down in a couple of hours.  Still hunting air leaks on my bus.

Offline Utahclaimjumper

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Re: Scenic Repairs
« Reply #4 on: March 02, 2015, 04:08:47 PM »
 The governor on your compressor is adjustable.>>>Dan (but you also need to stop the air leaks)
Utclmjmpr 
 EX 4106 (presently SOB)
Cedar City, Ut.
 72 VW Baja towed

Offline tuccitown

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Re: Scenic Repairs
« Reply #5 on: March 02, 2015, 04:17:03 PM »
Thanks for the suggestions, I have a feeling I'll be hunting down leaks for some time. I attempted to back it onto ramps this weekend and now have it stuck partway up the ramps as the drive axle has no load and the tag axle is partially on the ramp. Fun stuff, I did disconnect the levelers in an attempt to manually raise the rear but it doesn't seem to have any air supply.

Thanks again,

Jack
-------------------------------------------------------------------------
1979 GMC H8H649-053 Conversion in progress.
1955 GM PD 4501-377 Converted.
-------------------------------------------------------------------------

Offline TedCalvert

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Re: Scenic Repairs
« Reply #6 on: March 02, 2015, 04:28:25 PM »
Maybe unhook the line to the bag from the height control valve, fit a Schraeder valve, and use shop air.  Don't blow up the bag!