SB42-68
Service Bulletin Details
Public Details for: SB42-68
Freightliner: brake s-cam tube lubrication interval change. To ensure optimum service life and trouble-free operation, the recommended maintenance interval for lubricating meritor s-cam brake tubes on century class, columbia, cascadia and c
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SB-10049539-1296 42-68 Brake S-Cam Tube Lubrication Interval Change FLA COE FLB COE FLD Conventional Business Class FLC 112 Conventional > Century Class Conventional Argosy COE Cargo > Columbia Freightliner Service Bulletin > Coronado Business Class M2 > Cascadia 108SD/114SD General Information To ensure optimum service life and trouble-free operation, the recommended maintenance interval for lubricating Meritor S-cam brake tubes on Century Class, Columbia, Cascadia and Coronado over-the-road vehicles is changed from the M2 to the M1 maintenance interval. All S-cam tubes should be lubricated at 25,000 mile, regardless of brake brand. Fully lubricated brake S-cam tubes ensure that moisture and contaminants do not enter the cam tube, potentially causing corrosion, slow return, and seal damage. IMPORTANT: When lubricating the S-cam tube, the best indicator of a complete lubrication of the S-cam tube is to observe a grease purge from the inboard S-cam tube seal. See Fig. 1. Grease purge should be evident upon delivery of new vehicles after pre-delivery inspection (PDI) as well as after each prescribed maintenance interval. If there is no evidence of a grease purge, grease should be applied per maintenance manual instructions until grease purges at the inboard seal. 1 B 4 3 2 A f420011b 11/20/2012 A. Grease must purge here. B. If grease comes out at the cam head, replace the seal. 1. Brake Chamber 3. Grease Fitting 2. Slack Adjuster 4. Cam Head Fig. 1, S-cam Tube Lubrication Warranty This bulletin is informational only. Warranty does not apply. Freightliner Service Bulletin, December 2012 Page 1