Cummins/Onan — Industrial Fire Pump Engine Initial Start-Up
Installation
From a Cummins/Onan owner's manual covering: KT38, KTA19, Kt19, KtA38, KtA50, N-855, NH-672, NH-743, NH-855, NT-855, NTA-855, NTC-270…. Check it applies to your exact model before use.
Applies to: Cummins/Onan Kt19, Cummins/Onan KTA38, Cummins/Onan KTA50
Before you start
- Parts originally supplied must not be deviated from without qualifying agency approval (Underwriters Laboratory / Factory Mutual Research).
Procedure
- Contact operating personnel responsible for the fire protection system and obtain approval.
- Close all cooling system drains.
- Remove the heat exchanger cap; check or fill engine coolant supply; open the water filter inlet and outlet valves.
- Prelubricate the engine with API Class CD or CC oil, SAE 15W40 or 20W40; on turbocharged engines add 2 to 3 oz. [60 cc] oil to the turbocharger oil inlet line.
- Check the crankcase oil level and fill to the high mark on the dipstick.
- Remove the fuel pump solenoid wire and crank the engine through two cranking cycles using the fire pump controller.
- Turn the governor idle adjusting screw counterclockwise 6 turns to permit near idle speed at initial start-up.
- Verify the lube oil system is under pressure.
- Operate the engine for 8-10 minutes and look for leaks, unusual noises or other indications of improper operation.
- Set the overspeed stop switch.
- Stop the engine and check the engine oil and expansion tank coolant levels; top off if necessary; clean the raw water strainer.
- Start the engine and bring it to the fire pump required operating speed; adjust the raw water pressure regulator and readjust speed if necessary.
- Lock the governor lever (naturally aspirated) or max speed screw (turbocharged) in position.
- Shut off the engine; notify operating personnel and obtain authorized signature of acceptance.
Specs & values
- Idle speed adjusted by turning the governor idle adjustment screw counterclockwise to decrease RPM or clockwise to increase RPM
Full service-parts list: Cummins/Onan Kt19 →, Cummins/Onan KTA38 →, Cummins/Onan KTA50 →
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.