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Service bulletins for the 2016 ARBOC Spirit of Mobility

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

12 on file from NHTSA, as of 2026-10-19.

By type

By component

Only bulletins with type: Service bulletin are shown. Show all

Bulletins, newest first
AR8612018-09-17. Service bulletin. SUSPENSION. 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.
AR8602018-09-17. Service bulletin. STRUCTURE:FRAME AND MEMBERS. 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)
AR8562018-05-14. Service bulletin. ENGINE AND ENGINE COOLING. 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.
AR8542018-03-05. Service bulletin. ELECTRICAL SYSTEM. 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.
AR8472017-10-05. Service bulletin. ELECTRICAL SYSTEM. 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)
AR8442017-10-05. Service bulletin. SUSPENSION. 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.
AR8422017-08-25. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; SUSPENSION; FUEL SYSTEM, GASOLINE. 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.
AR8412017-08-25. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. 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.
AR8402017-08-25. Service bulletin. SUSPENSION; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. 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.
AR8392017-08-25. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; SUSPENSION:REAR:SHOCK ABSORBER; STRUCTURE; SUSPENSION:FRONT:SHOCK ABSORBER. 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.
AR8332017-08-10. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM:WIRING. 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)
AR8312017-08-10. Service bulletin. STRUCTURE; STRUCTURE:FRAME AND MEMBERS. 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)

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.