Cummins/Onan — Injectors - Remove and Install
Repair & overhaul
From a Cummins/Onan owner's manual covering: K 19, K19, K19 Series, KTA19, KTTA19, Kt19. Check it applies to your exact model before use.
Applies to: Cummins/Onan K 19, Cummins/Onan Kt19, Cummins/Onan K19 Series (KT19/KTA19/KTTA19) engine, Cummins/Onan KT19 engine, Cummins/Onan KTA19 engine
Before you start
- Do not let tappet fall out.
- Do not push injector on seat until correctly aligned.
- Do not use wooden tool to push injector on seat.
Procedure
- Remove rocker lever cover and assembly.
- For STC/HVT, remove banjo connector screw, oil transfer tube, sealing washers, and o-ring.
- Remove injector hold down capscrews and clamp.
- Use injector puller to remove injector.
- Check orifice screen; clean if debris present.
- Install correct o-rings and sealing ring.
- Position injector in bore and align.
- Seat injector with quick hard push.
- Install hold down clamp and capscrews; tighten alternately to 16.2 Nm [145 in-lb].
- Install jumper tube o-ring and connector screw; tighten to 25 Nm [20 ft-lb].
- Install rocker lever assembly and adjust valves and injectors.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 16.2 Nm [145 in-lb]
- 25 Nm [20 ft-lb]
Full service-parts list: Cummins/Onan K 19 →, Cummins/Onan Kt19 →
Source: Cummins/Onan owner'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.