Aftermarket BUS_014
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Look to Firestone for the most complete line of air springs in the industry. Although air springs are produced in single, double and triple convoluted and reversible sleeve styles, only those manufactured by Firestone Industrial Products Company bear the trademark “Airide™ .” Airide springs were pioneered and perfected by Firestone, and only Firestone offers a complete line of Airide springs, with replacement springs available for virtually every vehicular air suspension system. Today, Airide springs are used by nearly all manufacturers who offer air suspension on their vehicles. While it...

The Mechanics of Airide springs ™ 1. Stud A permanent part of the bead plate assembly used to attach the airspring to the suspension. 2. Combo Stud Combination mounting stud and air fitting. 3. Blind Nut A permanent part of the bead plate assembly providing an alternate mounting system to the stud. 4. Air Fitting Hole A tapped hole usually 1/4" N.P.T. providing air entrance for the part. 5. Bead Plate Permanently crimped onto the bellows at the factory allowing complete part leak testing prior to shipment. 6. Bellows The heart of an Airide spring. Includes at least four plies, or layers, of...

Identifying Airide springs ™ 1. Read the bead plate number. The first step to identifying an Airide spring, either convoluted or 1T style, for replacement is to read the manufacturer or Firestone number on the sticker on the bead plate. If the number is illegible, read the part number, normally molded on the bellows directly under the Firestone name. The number 1T15 or 22, etc. will tell you exactly which bellows you need, and you can skip steps 2 and 3. 2. Measure the height of 1T springs. 3. Measure the diameter of convoluted springs. If, for some reason, you can’t read the bellows...

Identifying Airide springs ™ 4. Determine whether your spring has a rubber bumper. 5. Identify the piston and bead plate of 1T style springs. 6. Identify the bead plates of convoluted springs. Many Airide springs include a rubber bumper inside the spring. To determine whether yours includes one or not, compress the spring to its minimum height and measure the height from the bottom of the bottom plate or piston to the top of the upper bead plate. With this measurement you can then contact Firestone or your distributor to determine if a rubber bumper exists. Then go on to step 5, if you have...

Double Convoluted Convoluted Style Single Convoluted Firestone convoluted Airide springs are available in two styles, single or double convoluted, as shown above. To identify the exact style and part number to replace your current air spring, you need to identify the type of bellows, bead plates, and attaching hardware used, as well as determining whether the spring has an internal bumper. First, look for the manufacturer’s part number and Firestone order number stamped in ink on the bead plate. If illegible, read the part number molded on the bellows, normally under the Firestone name. If...

Single Convoluted BELLOWS # ASSEMBLY ORDER NO. CROSS SECTION VIEW BEAD PLATE–TOP VIEW BEAD PLATE–BOTTOM VIEW REPLACES NEOPLAN A/C MOUNT FLXIBLE 6-336-18 ASSEMBLY WEIGHTS Double Convoluted M.C.I. # 12C-1-35 RUBBER ONLY TRAILERS DE MONTERREY # 73312 DIESEL NACIONAL # A1Z-8127-19 Hardware Key Bolt or Stud 1/2-13 Threaded Hole 3/8-16 Blind Nut on Bead Plates 1/2-13 in Pistons Air Inlet 1/4 N.P.T. Combination Stud/Air Inlet Stud Outside Thread is 3/4-16 Studs Inside Thread (Air Inlet) is 1/4 N.P.T. Exceptions will be noted on Part View as

CROSS SECTION VIEW BEAD PLATE–BOTTOM VIEW ASSEMBLY WEIGHTS BEAD PLATE–TOP VIEW Hardware Key Bolt or Stud 1/2-13 Threaded Hole 3/8-16 Blind Nut on Bead Plates 1/2-13 in Pistons Air Inlet 1/4 N.P.T. Combination Stud/Air Inlet Stud Outside Thread is 3/4-16 Studs Inside Thread (Air Inlet) is 1/4 N.P.T. Exceptions will be noted on Part View as

Double Convoluted BELLOWS # CROSS SECTION VIEW BEAD PLATE–TOP VIEW BEAD PLATE–BOTTOM VIEW ASSEMBLY WEIGHTS REPLACES G.M.C. # RUBBER ONLY 686145/2292367 ALSO M.C.I. # 12C-1-35 NOTE: SPECIFIC SPACER INCLUDED WITH ASSEMBLY NEW FLYER # 5951714 ALSO A.M.G. FLXIBLE # 6-336-178 SAME AS 653-7122 Hardware Key Bolt or Stud 1/2-13 Threaded Hole 3/8-16 Blind Nut on Bead Plates 1/2-13 in Pistons Air Inlet 1/4 N.P.T. Combination Stud/Air Inlet Stud Outside Thread is 3/4-16 Studs Inside Thread (Air Inlet) is 1/4 N.P.T. Exceptions will be noted on Part View as

BELLOWS # ASSEMBLY ORDER NO. CROSS SECTION VIEW 1/2-20-UNF BEAD PLATE–BOTTOM VIEW ASSEMBLY WEIGHTS BEAD PLATE–TOP VIEW Hardware Key Bolt or Stud 1/2-13 Threaded Hole 3/8-16 Blind Nut on Bead Plates 1/2-13 in Pistons Air Inlet 1/4 N.P.T. Combination Stud/Air Inlet Stud Outside Thread is 3/4-16 Studs Inside Thread (Air Inlet) is 1/4 N.P.T. Exceptions will be noted on Part View as

Double Convoluted BELLOWS # CROSS SECTION VIEW BEAD PLATE–BOTTOM VIEW ASSEMBLY WEIGHTS BEAD PLATE–TOP VIEW 3271 Hardware Key Bolt or Stud 1/2-13 Threaded Hole 3/8-16 Blind Nut on Bead Plates 1/2-13 in Pistons Air Inlet 1/4 N.P.T. Combination Stud/Air Inlet Stud Outside Thread is 3/4-16 Studs Inside Thread (Air Inlet) is 1/4 N.P.T. Exceptions will be noted on Part View as

Extended height Collapsed height The Firestone 1T or Reversible Sleeve type spring is the most popular style used on bus suspensions. Most of your replacement work will probably be with this style. Identification of the proper replacement assembly requires identifying the bellows type and the bead plate and piston type used, as well as whether the spring includes an internal rubber bumper. As with other styles, the quickest way to identify the airspring is to read the manufacturer or Firestone order number on the bead plate. If the number is illegible, read the part number molded on the...

CROSS SECTION VIEW PISTON–BOTTOM VIEW BEAD PLATE–TOP VIEW ASSEMBLY WEIGHTS REPLACES CHANCE # 270-03376 FLXIBLE # 6-336-195 CROWN COACH FLXIBLE 6-336-2 Hardware Key Bolt or Stud 1/2-13 Threaded Hole 3/8-16 Blind Nut on Bead Plates 1/2-13 in Pistons Air Inlet 1/4 N.P.T. Combination Stud/Air Inlet Stud Outside Thread is 3/4-16 Studs Inside Thread (Air Inlet) is 1/4 N.P.T. Exceptions will be noted on Part View as