Cummins/Onan B43 / B48 — Starter Assembly
Repair & overhaul · starting system
For the Cummins/Onan B43 / B48, from the Cummins/Onan service manual.
Applies to: Cummins/Onan B48
Procedure
- Wipe any dirt from parts with a clean cloth or filtered compressed air.
- Assemble brushes so the chamfered side is away from the brush springs; keep brush wires clear of commutator and end cap.
- Torque brush screws to 3 to 3-1/2 ft-lbs (4 to 5 Nm).
- Torque input stud nut to 4 to 5 ft-lbs (5 to 7 Nm).
- Apply thin film of grease to commutator end and bearing contact area of armature shaft; apply generous film of silicone base grease (GE Versilube 322-L) to shaft threads.
- Torque stop nut to 20 to 25 ft-lbs (27 to 34 Nm).
- Torque thru-bolts to 4.5 to 6 ft-lbs (6 to 8 Nm).
- Apply a small amount of silicone based grease (GE Versilube 322-L) to armature shaft spline.
- Install dust cap, pinion gear, dust cover spacer, anti-drift spring, stop nut washer, and stop nut; push dust cover on until it snaps into position.
Tools required
- torque wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Brush screws 3 to 3-1/2 ft-lbs (4 to 5 Nm)
- Input stud nut 4 to 5 ft-lbs (5 to 7 Nm)
- Stop nut 20 to 25 ft-lbs (27 to 34 Nm)
- Thru-bolts 4.5 to 6 ft-lbs (6 to 8 Nm)
Full service-parts list: Cummins/Onan B48 →
Source: Cummins/Onan service 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.