Common Issues/Tech

Home Common Issues/Tech

Listed below are some Common Issues and Tech Bulletins.

Click on the title below to take you to the appropriate bulletin. These pages will be updated as new issues and bulletins are encountered.

Freightliner Century Class ST Cab Air Spring

Issue	OEM #	Firestone	Goodyear
Change of cab air spring	18-40977-000 superseded by 18-52651-000	W02-358-7207 superseded by W02-358-7215	1S5-175

W02-358-7215 replaced W02-358-7207. Due to proximity of the cab air spring to the exhaust system the bellows composition was changed to protect it from the premature high temperature damage it was incurring.

Freightliner FASII Rear Suspension

Issue	OEM #	Firestone	Goodyear
Air spring can be purchased with either or aluminum or plastic piston	Several	W01-358-9780 (plastic); W01-358-9781 (alum.); W01-358-9782 (steel)	1R12-303 (plastic) 1R12-603 (alum.) Steel piston not available

Freightliner FASII Rear Suspension:

If your original air spring has a plastic piston then the W01-358-9780 / 1R12-303 (plastic base) or the W01-358-9781 / 1R12-603 (aluminum base) can be used as a replacement.

Warning!!:

If the original is spring has an aluminum piston then it is very important that only the W01-358-9781 / 1R12-603 be used.
If the original air spring has a steel piston on it, then only the W01-358-9782 is to be used. Goodyear currently does not make an equivalent with the steel piston.

Fruehauf / Wabash

Issue	OEM #	Firestone	Goodyear
Air spring now being made for inside & outside piston mounting	UCE-9393-1 superseded by UCE 9393-2	W01-358-9130 superseded by W01-358-9394	1R12-279 superseded by 1R12-281

Firestone and Goodyear make 1 air spring for both inside and outside piston mounting.

Firestone offers the W01-358-9394, however in order to use the center mounting option (Originally #W01-358-9130) you must remove the central bolt which hold the piston on. The outside piston mounting holes are already included.
Goodyear offers the 1R12-281 and there is a threaded holes for both the center (Originally 1R12-279) and outside mounting options.

Hendrickson - How to identify Suspension model #

Application	Issue	OEM#	Firestone	Goodyear
Hendrickson - How to identify Suspension model #	Tech Bulletin that helps identify suspension model #'s

The following link will help you identify your suspension model. With the suspension model # air springs and shocks can be correctly identified.

Hendrickson- Identification guide — How to identify Suspension model #

Holland - Neway CB400 Trailer Suspension

Application	Issue	OEM#	Firestone	Goodyear
Holland - Neway CB400 Trailer Suspension	Possible spacer requirement due to ride height options	905-57-372 (supersedes 905-57-306 & 905-57-363)	W01-358-8882 superseded by W01-358-9807	Currently not available

Holland-Neway CB-4000 suspension air spring change. Original OEM #905-57-306 (aftermarket W01-358-8882) was superseded by 905-57-363 (aftermarket W01-358-9807). Depending on the suspension ride-height an additional spacer may be needed. Below is a chart (figure #1) that’ll help figure out which spacer will be needed by either the use of the original spacer or knowing what the suspension height is. The suspension ride height can also be found on the serial tag as well (figure #2).