June 23, 2018, 11:05:13 AM

Author Topic: Air dryer location  (Read 2871 times)

Offline treeplanter

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Air dryer location
« on: April 18, 2013, 03:46:13 PM »
I need help locating the air dryer on my 1971 GMC 5305, does anyone know where it is located and if they ever need to be repaced or serviced.
Timothy

Offline Kwajdiver

  • MCI-9 "Kwaj Diver"
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Re: Air dryer location
« Reply #1 on: April 18, 2013, 03:49:29 PM »
On the MCI-9 it is between the front wheels, under the bus.

Not sure if this helps or not.

Bill
Auburndale, Florida
MCI-9
V-6-92 Detroit, Allison 5 spd auto
Kwajalein Atoll, RMI

Offline luvrbus

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Re: Air dryer location
« Reply #2 on: April 18, 2013, 05:12:03 PM »
If you don't get a loud pop off sound when the correct air pressure is achieved you may not have one
Life is short drink the good wine first

Offline Scott Crosby

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Re: Air dryer location
« Reply #3 on: April 18, 2013, 05:14:19 PM »
Follow the main air line from the compressor. If you have one it will be the first thing (becides the muffler) before a tank.  If you get to the wet tank first, then you don't have one.  My 61 gm did not, I added it.  
61 GM Fishbowl TDH 4516 102" 35'
1947 GM PD 3751
www.busgreasemonkey.com

Offline chessie4905

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Re: Air dryer location
« Reply #4 on: April 18, 2013, 09:37:31 PM »
I don't know whether the city buses have a fuel tank that sits crosswise from side to side. On the 4905, the drier is installed on the driver's side space at end of fuel tank with the 145 gallon version. (165 gal tank uses up that space) There are already air line couplers overhead there to connect the drier into the system. Any bus that old probably would need drier replaced anyway as it is an obsolete model/version.
GMC h8h 649#028 (4905)
Pennsylvania-central

Offline TomC

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Re: Air dryer location
« Reply #5 on: April 19, 2013, 03:13:08 PM »
As previously stated, if you don't here an obvious air expel when the air gets up to pressure, you don't have an air dryer. Would suggest an Bendix AD-9. Been around for years and easy to work on. Good Luck, TomC
Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.

Offline treeplanter

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Re: Air dryer location
« Reply #6 on: April 19, 2013, 04:07:21 PM »
Ok thanks i do hear a pop off when air reaches pressure, i will have to locate source. Thanks Tom for the info on an replacement device. I want to make sure all important safety devices work correctly. i want the underside of my bus to look as good as the day she came off of  the assembly line.
Timothy