Cummins/Onan — Air Compressor (Single Cylinder) - Replace (04-15)
Repair & overhaul
From a Cummins/Onan service manual covering: K 19, K19, KTA19, KTA19-M, KTA19G2, KTTA19, Kt19. Check it applies to your exact model before use.
Applies to: Cummins/Onan K 19, Cummins/Onan Kt19, Cummins/Onan K19 engine
Before you start
- This assembly weighs more than 23 kg [50 lb]. Handle securely to avoid dropping.
- Do not tighten any capscrews until the support bracket is aligned.
Procedure
- Drain the cooling system (01-06).
- Disconnect the coolant lines from the air compressor.
- Remove the air inlet and outlet connections.
- Remove the fuel pump (05-11).
- Remove the air compressor support mounting capscrews.
- Remove the four capscrews and nuts; remove the air compressor and spline coupling; discard the gasket.
- Install the spline coupling, gasket and compressor.
- Install the four capscrews and two nuts; keep capscrew loose.
- Install the two bracket capscrews; the support bracket must be flat against the block.
- Tighten the compressor to accessory drive capscrews to 45 N·m [35 ft-lb] and bracket to block capscrews to 45 N·m [35 ft-lb].
- Tighten the bracket to compressor capscrew to 45 N·m [35 ft-lb].
- Install the fuel pump, air inlet/outlet connections, coolant lines, fill the cooling system and check for leaks.
Specs & values
- Capscrews 45 N·m [35 ft-lb]
Full service-parts list: Cummins/Onan K 19 →, Cummins/Onan Kt19 →
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.