Vehicle report
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.
AR860
AR860-Front Pivot Mount Inspection and Repair. Complaint-Pivot mount bolts having repeated premature failure. Cause-Spring pivot bolt movement allowed by elongated mounting hole. Correction-Inspect/replace bolt. Labor allowance 2 hours per unit. Vehicles affected-Units that have completed AR831 and built with the front pivot mount bolted to the ARBOC frame without welding. (Buses between SO# 2202 and 2736)
AR861
AR861-Upper Shock/Track Bar Mount Inspection and Repair. Complaint-Upper plates previously installed in AR839 are cracking and pulling away from frame. Cause-Insuffiecient/bad welds not holding under loads. Correction-Inspect/correct welds including drilling 1/8" stop holes into frame at the end of cracks and weld per procedure. Vehicles Affected-All Spirit of Mobility (SOM) units with Reyco Granning rear suspension where AR839 has already been completed.
AR856
AR856-Customer concern about location of Thomas Compressor in wet areas. Cause-Engineering design for placement. Correction- Relocate Thomas Compressor to driver side rear of vehicle.
AR854
AR854-Change Electrical Body to Aux Battery Connections. Complaint-Electrical body connections tied to starter battery instead of aux battery. Cause-Electrical design. Correction-Relocate battery connection and add jumper harness between circuit breaker and solenoid. Vehicles Affected Chevy SOM/SOF.
AR844
AR844-Lower Shock Bracket Replacement-Complaint-Restricted shock compression with new upper shock mount location (AR839). Cause-New location of upper shock bracket completed in AR839 (if completed previously). Correction-Remove both existing lower shock brackets and replace. Affects all SOM units with Reyco Granning rear suspension.
AR847
AR847-Loose Thermo King Power & Ground Lugs Inspection-Repair. Complaint-Power/Ground lugs looseat connection points at circuit breaker or ground bar. Cause-Lugs incorrectly crimped or loose connections at circuit breaker or ground bar. Correction-Review lugs for secure installation and lug crimp (repair as needed)
AR842
Complaint: Desiccant Dryer Filters failing within months of installation which potentially leads to failure of pressure transducer and Thomas Compressor. Cause-Tanks need to be drained daily instead of previous instruction of every oil change. Correction- Add 1200651 (pull-cord drain valve), 1401863 (drain tank label), and repalce 2002838 (desiccant filter). Affects units with Valid Air Suspension with Thomas Compressor without pull-cord drain valves. This WO is the same document as AR840 but this customer needs their own document. There are no differences.
AR841
Complaint-Dedicated Micros Box Bracket cracking. Cause-Bracket 1309054 does not have enough material between slotted hole and exterior edge of part. Correction- Replace bracket 1309054 with revised bracket 1310546. Affects only Dallas DART buses.
AR840
Complaint: Desiccant Dryer Filters failing within months of installation which potentially leads to failure of pressure transducer and Thomas Compressor. Cause-Tanks need to be drained daily instead of previous instruction of every oil change. Correction- Add 1200651 (pull-cord drain valve), 1401863 (drain tank label), and repalce 2002838 (desiccant filter). Affects units with Valid Air Suspension with Thomas Compressor without pull-cord drain valves.
AR839
AR839-Upper Shock/Track Bar Mount Replacement. Complaint-Cracking at upper shock and track bar mounts on chassis frame. Cause-Concentrated stress loads. Correction- Drill 1/8" stop holes into frame at the end of the cracks and weld provided retrofit bracket in affected areas.
AR833
Dallas DART-Speaker Mofification-Complaint-Rear speakers not functioning. Cause-Speakers wired to GM OEM connection. Correction-Re-wire into PA System. 27 Dallas DART buses affected, built in 2016 (2607, 2685-2691, 2695-2697, 2700-2703, 2710-2712, 2715-2723)
AR831
Front Pivot Mount Reinforcement-Complaint-Pivot Mounts 1306500-18 (RS) and 1306500-19 (CS)= bolts coming loose/shearing causing bracket failure. Cause-Inferior bracket support leading to bolt shearing and pivot mount movement. Correction-Add gussets and welding per instruction. Vehicles Affected-Units built with the front pivot mount bolted to the ARBOC frame without welding (SOM only between SO# 2202 and 2736)
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.