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Benefits from larger accessory air tank?
I need to replace my accessory air tank in the steering compartment. The old one is 8” in diameter and 27” long, which puts it around 5 gallons. The selection online is a bit overwhelming, but I think I could come close to a direct replacement. On the other hand, I could comfortably add a few inches in length or go to 9.5” or 12” in diameter because of some removed equipment next to the tank. Apart from the suspension, my air needs are minimal – sliding floor, belt tensioners, fast idle, windshield wipers, entry door lock and a few inop items (tag lift, driver seat, gray water bypass, and generator slide). I may be forgetting something. Would there be any benefit to having a larger tank?
Also, is there any place you’d recommend going for the purchase of a tank and some new brass fittings? I’m thinking of swapping out a bunch of T and four-way fittings for a manifold with individual shutoff valves for isolating branches. Everything is NPT or compression.
1984 96" with 8V92TA
(remodeled Liberty Coach)
Greenwood, MO -
5 Replies
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Chad….
Everything your looking for is here in KC. Give me a call
AL
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Here’s an air tank I have used:
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Chad, You probably do not need to replace the Liberty installed tank. You should have an accessory tank on the chassis for the suspension and wipers and all late model Liberty coaches, even with their extensive use of air only have and use the Prevost accessory tank
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Thanks for the replies, fellas. Al, that’s great news! I’d love to use a local supplier. I don’t have your phone number anymore, but I’ll shoot you an email with my phone number. You can email me your number or just call me at your convenience.
I should have mentioned that my tank in the steering bay had rusted through on the bottom. Although I haven’t traced all of the lines that were coming off of it, there were five outlet branches plus a line from each compressor (3/8” from the engine-driven and a 1/2” line from the electric auxiliary compressor). It sure looks to me that all of my accessories are coming from this tank. I’ll attach a photo from a few years ago. With the psi gauge, the air chuck, and the compressor controller, there is a lot going on there. Is there any reason to not change to a manifold with individual quarter-turn ball valves for each branch?
The branches include one 3/8” and three 1/4” fittings that see full pressure, and one 3/8” and one 1/4” fitting that are downstream of a 60 psi Bendix PPV. I found some pneumatic diagrams that should be pretty similar to mine. They show this tank, a wet tank, two service tanks, and a brake release air reservoir. I haven’t spent much time under the bus myself yet, so I can’t say for sure what my tank configuration really is.
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Chad, it will be interesting what you find as far as your tank situation on your coach. A brake release tanks sounds like you have DD3 brakes and a set up for accessory air completely different than later model coaches.
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