Hub Cap Leak Inspection

m2+ m 33.05.001

Check for evidence of oil leakage between the hub cap, gasket and hub surface. If leakage is evident, replace the gasket with a new one. See  of the Business Class M2 Plus Workshop Manual for instructions.

Check for a missing hub cap fill plug or vent plug. See Fig.. Replace any missing parts. If a vent plug is missing, the oil quality is compromised and must be replaced. See  of the Business Class M2 Plus Workshop Manual for instructions.

  • Hub Cavity Full

  1. Vent Plug

  2. Magnetic Drain/Fill Plug

Fig. 1, Stemco Hub Cap

Note:
Parent topic: Wheel End Inspection and Maintenance, 6,000-Pound and 8,000-Pound Steer Axles with Oil-Lubricated Hubs
Document Number: 0000120980
Manual Publication Date: 2025-02-11
Topic Publication Date: 2024-11-06