Cummins/Onan QSX15 / QSx15 — Fan Hub, Belt Driven - Maintenance Check
Maintenance
For the Cummins/Onan QSX15 / QSx15, from the Cummins/Onan operator's manual.
Applies to: Cummins/Onan QSx15, Cummins/Onan QSX15 engine
Procedure
- Inspect fan hub for freedom of rotation, cracks, and grease seal leakage.
- Repair or replace fan hub if it does not rotate freely or if cracks or grease seal leakage is evident.
- Measure fan hub end clearance.
Specs & values
- Fan hubs with step-bore shafts and no bearing spacers: 0.08 to 0.25 mm [0.003 to 0.010 in] end clearance.
- Fan hubs with through-bore shafts with inner and outer bearing spacers: 0.08 to 0.41 mm [0.003 to 0.016 in] end clearance.
Full service-parts list: Cummins/Onan QSx15 →
Source: Cummins/Onan operator's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.