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Old 08-27-2019, 09:21 PM   #1
Skoolie
 
Join Date: Jul 2018
Location: Olathe, Kansas
Posts: 156
Year: 1990
Coachwork: Crown
Chassis: Supercoach
Engine: 6-71TA
Rated Cap: 90
Crown Air Bags

Any Crown guys know of a way to determine the air bags on a 1990 Crown Supercoach without having to remove them? My Crown has Firestone bags and their part numbers which begin with W0 is usually a sticker somewhere on it. There is also the bellows number (1T15L-2) on the side of the rubber bag itself. The attached pics was from the front bags. I don't know if the rear bags have the same number as I could not easily get to them at this time.

Unfortunately, the bellows number produces over 40 options to choose from.
I have been told that I need to remove the bag and take measurements of the upper and lower mounting plates in relation to where the air inlet and mounting stud locations are. This may result in it being an OE only type of bag.

The only Firestone number that I found for Crown was W013589432 as shown below. However, it has a different bellows number than what I have on the front.

Firestone Bellows Number:1T15L-4
Replaces:Crown Coach
Extended Height:16.00
Compressed Height: 6.43
Top Plate Number:3215
Top Plate Width:9.00
Piston Number:9656
Piston Width:9.75
MPN: W013589432
Attached Images
File Type: jpg 20190824_210252.jpg (221.0 KB, 5 views)
File Type: jpg 20190824_210356.jpg (238.0 KB, 4 views)
File Type: jpg 20190824_210527.jpg (266.6 KB, 5 views)
GWRider is offline   Reply With Quote
Old 08-27-2019, 09:26 PM   #2
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 11,847
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
seems those numbers should cross to a good year bag.. my carpenter bus had a firestone bag on it.. it crossed over to a good year number when i checked it out.. wondering if a dstandard truck parts house like truck-pro might be able to cross it.. good year still makes many bags.. im not sure about firestone.
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Old 08-30-2019, 08:57 AM   #3
Skoolie
 
Join Date: Jul 2018
Location: Olathe, Kansas
Posts: 156
Year: 1990
Coachwork: Crown
Chassis: Supercoach
Engine: 6-71TA
Rated Cap: 90
There are many bags out there but finding the correct part number is the challenge. I had someone tell me they are standard air bags used on many trucks but it turns out it is not that straightforward. Sites like TruckSpring.com has like 40 different airbags for the bellows number on the side of the bag (see pic above).
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