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01-26-2023, 06:07 PM
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#1
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New Member
Join Date: Jan 2023
Posts: 4
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Can't find the air dryer 1996 Thomas bluebird
I recently purchased this bus to drive across the country and while I'm trying to service everything I cannot find anywhere the air dryer
Is it possible it doesn't have one?
1996 Thomas bluebird tc2000
5.9 Cummins
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01-26-2023, 06:33 PM
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#2
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New Member
Join Date: Jan 2023
Location: Walnut, KS
Posts: 4
Year: 2000
Chassis: IHC 4700
Engine: Dt466e
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When the air system reaches it's maximum pressure, do you hear a loud release of air as the dryer purges the moisture? I do know that in the mid 1990's there were some trucks made without a dryer, they used a special aluminum air tank with an automatic drain valve. We had a few of them in the fleet I used to maintain.
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01-26-2023, 09:10 PM
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#3
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Bus Nut
Join Date: Mar 2017
Location: arkensaw
Posts: 817
Year: 1998
Coachwork: bluebird
Chassis: chevy
Engine: 3116 catapillar
Rated Cap: 71 now 2 humans 1 cat
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follow the supply line out of the compressor. the drier is usually within 10 feet of the compressor. it was not unusual to not have one back then. you probaly will be looking for a bendix ad4 or ad8 model. lookonline as to what they look like then follow your line
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01-26-2023, 09:32 PM
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#4
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Bus Crazy
Join Date: Nov 2014
Location: NM USA KD6WJG
Posts: 1,075
Year: 1991
Coachwork: Bluebird
Chassis: All American RE 40 FEET
Engine: Cummins 8.3
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I just recently serviced mine and ordered the parts through O'Reilly's auto parts. It was a Bendix AD-4. I would call it a 2 banana job. It is heavy so be careful lowering it out.
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01-27-2023, 06:48 AM
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#5
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New Member
Join Date: Jan 2023
Posts: 4
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No hiss to be heard no
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01-27-2023, 06:54 AM
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#6
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New Member
Join Date: Jan 2023
Posts: 4
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Where was it mounted on the bus?
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01-27-2023, 09:48 AM
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#7
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Bus Nut
Join Date: Mar 2017
Location: arkensaw
Posts: 817
Year: 1998
Coachwork: bluebird
Chassis: chevy
Engine: 3116 catapillar
Rated Cap: 71 now 2 humans 1 cat
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whereever they wanted. lots were installed by the end users as it was not always a option. it must be within 10 feet of the compressor. follow the airline as it could be somewhere else on the same bus.
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01-27-2023, 09:51 AM
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#8
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Bus Nut
Join Date: Mar 2017
Location: arkensaw
Posts: 817
Year: 1998
Coachwork: bluebird
Chassis: chevy
Engine: 3116 catapillar
Rated Cap: 71 now 2 humans 1 cat
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Quote:
Originally Posted by s2mikon
I just recently serviced mine and ordered the parts through O'Reilly's auto parts. It was a Bendix AD-4. I would call it a 2 banana job. It is heavy so be careful lowering it out.
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i used a ad4 on my outside airline at my shop. no matter how cold truckers could always air thier tires. i liked the ad4 it worked and was not expensive to rebuild
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01-27-2023, 10:35 AM
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#9
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Bus Geek
Join Date: May 2014
Location: West Ohio
Posts: 3,272
Year: 1984
Coachwork: Bluebird
Chassis: International 1753
Engine: 6.9 International
Rated Cap: 65
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Quote:
Originally Posted by mmoore6856
i used a ad4 on my outside airline at my shop. no matter how cold truckers could always air thier tires. i liked the ad4 it worked and was not expensive to rebuild
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What pressure was it at?
I've been thinking of doing that here, but the air pressure in the shop is 175 and I think most air dryers have a high limit below that.
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01-27-2023, 04:14 PM
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#10
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Bus Nut
Join Date: Mar 2017
Location: arkensaw
Posts: 817
Year: 1998
Coachwork: bluebird
Chassis: chevy
Engine: 3116 catapillar
Rated Cap: 71 now 2 humans 1 cat
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175 is what I had as some truck tires took 125. I had to adjust the overpressure safety valve up but the drier will take 200 easy. I would never try that with these newer ones. Just hook up your unloader on your compresser to the purge valve
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01-27-2023, 04:31 PM
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#11
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Bus Crazy
Join Date: Nov 2014
Location: NM USA KD6WJG
Posts: 1,075
Year: 1991
Coachwork: Bluebird
Chassis: All American RE 40 FEET
Engine: Cummins 8.3
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Mine was located just behind the fuel tank, in front of the baggage bays, toward the left side.
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01-27-2023, 04:55 PM
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#12
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Bus Geek
Join Date: May 2009
Location: Columbus Ohio
Posts: 17,680
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
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where was the bus purchased from? what state?
my 2000 Bluebird with hydraulic brakes.. yet has air ride suspension and air seat, had no air dryer.. the line came from the conpressor directly to the wet tank.. since i live north i installed one..
if your bus is fully hydraulic as in hydraulic brakes and no air ride, no air seat it may not have an air system at all.. or if it lived in a very warm dry climate it may have been built with no dryer
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01-28-2023, 01:08 PM
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#13
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Mini-Skoolie
Join Date: Oct 2009
Posts: 28
Year: 1972
Coachwork: wayne
Chassis: international
Engine: 345
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A 1996 might not have been built with an air dryer. I've seen trucks from that era not have one, all the school buses I work on are this century and came with air dryers.
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