Cummins/Onan — Fan Belt Replacement (Models DFLC, DFLD and DFMB)
Repair & overhaul
From a Cummins/Onan operator's manual — check it applies to your exact model before use.
Applies to: Cummins/Onan DFLB, Cummins/Onan DFLC, Cummins/Onan DFLE, Cummins/Onan DFM, Cummins/Onan KTA50 / KTTA50 engine, Cummins/Onan KTA50 engine, Cummins/Onan KTTA50 engine
Before you start
- The fan belt idler is under tension; do not get hands between idler and belt or fan hub.
Procedure
- Slip new fan belt behind disconnected fan support bracket and onto pulleys.
- Reinstall fan support bracket using six capscrews.
- Torque capscrews to 165 - 175 lb. ft. (186 - 197 Nm).
- Relieve sling tension and remove sling from fan spacer.
- Align belt grooves on the ribs of the pulley and shaft.
- Reinstall shock absorber using capscrews, washers and spacers.
- Recheck belt for proper alignment.
- Install fan belt guard and safety cage, then reconnect starting batteries.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Fan support bracket capscrews 165 - 175 lb. ft. (186 - 197 Nm)
Full service-parts list: Cummins/Onan DFLB →, Cummins/Onan DFLC →, Cummins/Onan DFLE →
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.