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.
SB-75
Service Bulletin/Repair Instructions
It has come to our attention that on certain Tiffin motorhomes equipped with optional Go Power! solar panel solar panels systems, the 30A inline fuse located before the cable entry plate should be removed. The plastic housing surrounding the fuse may become heat damaged from heat generated by the normal operation of the 30A fuse, which would cause the solar panel system to not operate as designed. Due to updated recommendations from Go Power!, Tiffin Motorhomes is removing this 30A fuse from the solar panel system.
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.
MCD-003
Service Bulletin/Repair Instructions
On certain Tiffin Motorhomes equipped with an optional overhead bunk, an additional latch should be installed to secure the bunk in the event that the owner of the motorhome does not fully engage the primary bunk latches.
CSA-026
Service Bulletin/Repair Instructions
Some 2023 year models of Tiffin Motorhomes built on PowerGlide chassis have a Federal Certification Label that does not have the tire information listed. To correct this issue, we are sending dealers and owners of involved units a corrected Federal Certification label to be placed in the involved motorhomes.
CSA-023
Service Bulletin/Repair Instructions
Re: Recalls # 22E-063 and # 22V-554 from Cummins and Freightliner. Notice applies to engine. Engine is equipped with an Engine Control Module (ECM) that may have a manufacturing defect that could result in as engine stall without warning. An unexpected engine stall without the ability to restart the engine may lead to an increased risk of a crash. Cummins has released Safety Campaign ECM. #C2614 CM2450 ECM Replacement Safety Campaign to address this condition by replacing the ECM.