Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
CSA-045
Other
Tiffin sent out an addendum to be added to Owner's Manuals that states, "Tiffin Motorhomes recommends that all diesel units be refueled using standard automotive-grade diesel fuel pumps, rather than high-flow commercial truck stop pumps. The fuel delivery rate from commercial truck stop pumps is often too aggressive for motorhome fuel systems, which are not designed to handle rapid fuel intake. Using high-flow commercial truck stop pumps can result in overflow, spillage, premature shutoff, or even damage to the fuel fill components."
MCD-009
Other
Stopped using the lights we had been using due to expense. Replaced with these, but these new lights have to be wired in instead of just clicking in. These are the instructions to wire in.
CSA-036
Service Bulletin/Repair Instructions
Faulty DEF sensors that due to shortage were not replaced. Instead engine software was temporarily modified to account for continued operation with a faulty sensor until replacement sensors were available. This campaign will install an engine control module calibration as well as confirm and/or install a new DEF header.
CSA-11
Service Bulletin/Repair Instructions
Tiffin Motorhomes was notified by Daimler Trucks North America on behalf of Freightliner Custom Chassis Corporation of a defect that exists on specific model year 2017 - 2022 Freightliner Custom Chassis X-Line chassis manufactured February 20, 2017 through November 18, 2021 that are equipped with a valve stem extension and stabilizer configured with a specific tire valve stem and wheel combination. Tiffin Motorhomes built motorhomes on these specific Freightliner chassis between April, 2017 through December 6, 2021. Certain chassis may have been built with the tire valve stem extension for the inner wheel contacting the outer wheel rim opening, potentially damaging the valve stem resulting in a loss of air pressure in the inner tire. A loss of air pressure in the inner tire on a motorhome with a single drive axle may overload the outer tire and increase the risk of a crash.
CSA-10
Service Bulletin/Repair Instructions
Tiffin mailed out a Customer Service Advisory on a Daimler Field Service Campaign (SF637) as a curtesy. The subject is FCCC Viper Low Voltage Display.
CSA-009
Service Bulletin/Repair Instructions
FCCC Motorhome Chassis Rear PDMâs FL-856
CSA-004
Service Bulletin/Repair Instructions
Customer Service Advisory for Cummins Recall #21E032 and Freightliner Recall #21V-326 for High Pressure Fuel Rail - Freightliner chassis units built on by Tiffin.
TIFF 12-2019
Service Bulletin/Repair Instructions
There is the possibility the water filter housing is installed incorrectly. If a motorhome has the water filter housing installed incorrectly, there is the possibility of excess air in the water lines.