Service bulletins for the 2018 ARBOC Spirit of Equess
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.
4 on file from NHTSA, as of 2026-10-19.
By type
By component
| AR882 | 2025-02-05. Service bulletin. STRUCTURE:BODY. Complaint: Compressor mounting brackets are breaking. Cause: Design. Correction: Add gusset to compressor mounting bracket. |
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| AR869 | 2019-08-05. Service bulletin. STEERING; POWER TRAIN. AR869-Spirit of Equess Gearbox Removal and Replacement. Complaint-Driveline gearbox failure. Cause-Component failure. Correction-Removal and replacement of driveline gearbox. Affects 2018/2019 Spirit of Equess (SOE) buses. |
| AR864 | 2019-06-06. Service bulletin. ELECTRICAL SYSTEM. AR864-ARBOC Spirit of Equess CAC Harness Modification. Complaint-Efan system on diesel bus found to have improper 12V power to radiator and CAC fans, causing unnecessary running at low temperatures that drain batteries. Cause-Improper supply of 12v analog signal to fans in Grayson fan harness. Correction-Field fix is to cut and insulate analog signal wire. Vehicles Affected are 3121, 3423, 3424, 3427, 3429, 3434, 3435. Labor Op Code is 0119801. Covered labor is 1 hour. |
| AR867 | 2019-05-08. Service bulletin. SERVICE BRAKES, AIR. Air Brake Hose Replacement-Complaint-Flexible brake hose damage. Cause-Hose between front air chambers and front brake valve making contact with axle on sharp turns. Correction-Complete visual inspection and change fittings to adjust angles. Replace hose. Affects only buses 3121, 3423, 3424, 3429, 3427, 3434, 3435, 3436, 3466 and 3467 |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.