Complaint: Drawn‐over‐mandrel (DOM) tube cracks in frame at rear spring, front frame brackets
Arboc technical service bulletin AR880 for 2018-2019 Arboc Spirit of Independence.
- Bulletin number
- AR880
- Component
- Suspension
- Summary
- Complaint: Drawn‐over‐mandrel (DOM) tube cracks in frame at rear spring, front frame brackets Cause: DOM tube to frame tolerance variations Correction: Weld cracks in DOM tube to frame connection Step 1) Pull unit onto hoist, chock tires to prevent bus from moving. Step 2) Disconnect negative battery cable from both batteries. Step 3) Inspect rear spring, front frame DOM tubes for cracks (see picture below‐ green arrows). Step 4) If NO cracks are found proceed to Step 7. Step 5) If cracks are found, remove rear spring, front frame bracket. Grind cracked area of frame and DOM tubes. Step 6) Weld cracks and grind repaired cracks smooth. Reinstall rear spring, front frame bracket. Torque bracket to frame bolts to 66 ft‐lbs. and spring to bracket bolts 166 ft‐lbs. Step 7) Weld frame bracket to frame (see red line in picture below). Using high quality undercoating or rust protective paint, coat repaired area. Step 8) Repeat Step 3 thru Step 7 on other side of frame. Step 9) Reconnect negative battery cables on both batteries. Step 10) Remove unit from hoist.
Vehicles covered
- Arboc Spirit of Independence 2018-2019 20182019
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