Added and Removed Firestone Part Numbers from …

1 230 Added and Removed Firestone part Numbers from CatalogItems Removed From the Previous CatalogBellows 939422CW01-358-68501T15M-9W01-358-9241 USE 9394233-2W01-358-77841T15TQ-1W01-358-577 4203CW01-358-75101T15TQ-5W01-358-5800 Cross References231 Added and Removed Firestone part Numbers from CatalogItems Added to the Current CatalogBellows (-0) air springs are designedto provide years and thousands ofmiles of trouble free service. Thedurability of Firestone air springs issuch that they will often outlast othermaintenance items on yoursuspension, such as bushings,shocks, leveling valves or regulators. Airide springs by Firestone arewarranted to be free of materialdefects and/or workmanship forvarious periods of time, dependingupon the application.

2 Freereplacements may be provided by theoriginal manufacturer, manufacturer srepresentative or dealer, or by anyFirestone air spring distributor. Alllabor and incidental costs associatedwith replacing the defective air springare the responsibility of the purchaser,or end user. Firestone Industrial ProductsCompany offers a complete line of Airide springs, with replacementsprings available for virtually everyvehicular air suspension each individual air spring isclosely examined and pressure testedat the factory, the vast majority ofpremature failures and consequentwarranty returns are found not to bedefective, but fail because of abusecaused by other problems associatedwith the you install a new air spring,you should carefully examine the oldone to determine what caused it tofail.

3 If it was due to a defect in thesuspension system, then the new airspring will also fail unless you correctthe information on the next twopages was developed to illustrate thetypes of failures that may occur, andto assist you in determining the causeand corrective action AIR SPRINGSAir SpringWarrantyEvaluationCriteria233 AIRIDE AIR SPRINGSA ppearance or Condition Off-center bumper contact Same as abrasion or bottomingoutPossible Causes Worn bushing Improper suspension installationAppearance or Condition Rubber bellows distorted andgirdle hoop torn looseAppearance or Condition Bead plate concave Internal bumper loose Hole in girdle hoop area(convoluted)

4 Hole in bead plate junction area Leaking around blind nutsPossible Causes Running at extended positionswith low air pressurePossible Causes Broken or defective shockabsorber Defective leveling valve Overloaded vehicle Pressure regulator set too low Wrong air spring (too tall)LOOSE GIRDLE HOOPBOTTOMING OUTMISALIGNMENThen applied andmaintained properly, Airide springs can providethousands of miles oftrouble-free service. Mostfailures are caused by alack of suspensionmaintenance or improperapplication. This is a guideto common air springfailures that are notcoveredby or Condition Hole rubbed into side of bellows Hole in bellows area that rollsover piston (reversible sleevestyle)Appearance or Condition Bellows cut in circle at bead plate junction Bellows cut in circle at pistonjunction (reversible sleeve style)Possible Causes Structural interference, such as:-broken shock-loose air line-misalignment-worn bushings No air pressure (reversible sleeve style) Foreign material (sand, rocks, etc.)

5 Wrong air springPossible Causes High pressure, fully extended forlong periods of time Impact in compressed positionAppearance or Condition Bead plate convex, especiallyaround blind nuts or studs Rubber bellows separated frombead plate Leaking at blind nuts or studs Leaking at end closure (reversible sleeve) Loose girdle hoop on con-voluted stylePossible Causes Broken or wrong shock absorber Defective leveling valve Ride position too high Defective upper stop (lift) Wrong air spring (too short)WARRANTY EVALUATION CRITERIAABRASIONCIRCUMFERENTIAL CUTSOVER EXTENSIONI nspect the of theairspring. Check forsigns of irregular wear orheat air lines to makesure contact doesn t existbetween the air line andthe of the air lines can rub a hole in an airspring very to see that thereis sufficient clearancearound the completecircumference of theair spring while at itsmaximum the of thepiston for buildup offoreign materials.

6 (On areversible sleeve style airspring, the piston is the bottomcomponent of the air spring).Correct ride height shouldbe maintained. Allvehicles with air springshave a specified rideheight established by manufacturer. Thisheight, which is found in yourservice manual, should bemaintained within 1/4 . Thisdimension can be checked withthe vehicle loaded or empty. Leveling valves (orheight control valves)play a large part inensuring that the total airspring system works asrequired. Clean, inspect andreplace, if sure you have theproper shock absorbersand check for leakinghydraulic oil and worn orbroken end connectors. Ifa broken shock is found,replace it immediately.

7 Theshock absorber will normallylimit the rebound of an airspring and keep it the tightnessof all mounting hardware(nuts and bolts). If loose,re-torque to themanufacturer s not over-tighten. APPROVEDA pproved cleaning media are soap and water, methyl alcohol, ethyl alcohol andisopropyl cleaning mediainclude all organic solvents,open flames, abrasivesand direct pressurizedsteam total inspection processdescribed on this page can be done in just a matter ofminutes. If you find one of the above conditions exists, please take corrective action to ensure that it is fixed properly. It will save you both time and MAINTENANCE CHECKLISTCLEANING isted below are items thatcan be checked whenthe vehicle is in forperiodic attempt to servicethe air suspension on a truck or trailer with theair springs Definitions236 BEAD PLATETOP VIEWPARALLEL ALIGNMENTBEAD PLATE OR PISTON BOTTOM VIEW45 DEGREEALIGNMENT90 is based on the orientation of the lower bead plate or piston compared to the upperbead plate.

8 Alignments other than those shown are noted in the bottom