Service Manual
Table Of Contents
- Table of Contents
- 1. IMPORTANT SAFETY INSTRUCTIONS
- 1.1 Warning, Caution, and Note Styles Used in This Manual
- 1.2 General Information
- 1.3 Generator Set Safety Code
- 1.4 Electrical Shocks and Arc Flashes Can Cause Severe Personal Injury or Death
- 1.5 Fuel and Fumes Are Flammable
- 1.6 Exhaust Gases Are Deadly
- 1.7 The Hazards of Carbon Monoxide
- 1.8 Earth Ground Connection
- 2. Introduction
- 3. Startup
- 4. Operation
- 5. Maintenance
- 5.1 Maintenance Safety
- 5.2 Periodic Maintenance
- 5.3 Engine Oil
- 5.4 Engine Valve Clearance
- 5.5 Normal Duty Air Cleaner Element Replacement
- 5.6 Exhaust System Maintenance
- 5.7 DC Electrical System
- 5.8 Batteries
- 5.9 Spark Plugs
- 5.10 Cleaning the Generator Set Housing
- 5.11 Cleaning the Slip Rings
- 5.12 Exercising the Generator Set
- 5.13 Complete System Test
- 6. Service
- 7. Troubleshooting
- 7.1 Troubleshooting Procedures
- 7.2 Safety Considerations
- 7.3 GATRR Troubleshooting Approach
- 7.4 Tools and Parts Required
- 7.5 Troubleshooting with the Local or Remote Displays
- 7.6 Utility-Powered Battery Charger Troubleshooting
- 7.7 Engine Flywheel Battery Charger Troubleshooting
- 7.8 Fuel Shutoff Solenoid Valve
- 7.9 Compression Test Procedure
- 7.10 Connecting with the InPower Service Tool
- 7.11 Troubleshooting by Symptom
- 7.12 Troubleshooting with Fault Codes
- 7.13 Remote Monitoring Communication Troubleshooting
- Appendix A. Wiring Diagrams
6. Service 10-2019
102 A062J683 (Issue 1)Copyright © 2019 Cummins Inc.
e. Reach through the fuel selection handle access opening and turn the
handle counterclockwise until it reaches detent (90° from starting position).
NOTICE
The handle should be horizontal for LP, vertical for NG.
f. Reinstall the fuel selector access cover. Torque screws to 5–6.6 Nm
(44–58 in-lb).
g. Reinstall the exhaust panel. Torque screws to 5–6.6 Nm (44–58 in-lb).
h. Close the generator set cover.
Fuel Shutoff Solenoid Troubleshooting
If the generator set does not start, first determine if the fuel shutoff valve is
functioning.
1. Locate the wire pairs marked FS1, FS2 and PT1, PT2 behind the service
access panel. Disconnect terminals FS1 from PT1 and FS2 from PT2.
2. Check that battery voltage is being supplied through the generator set harness
to the solenoid of the fuel shutoff valve. Use a multi-meter to measure DC
voltage between FS1 and FS2 while trying to start the engine.
Verify that the voltage is between 10.2 and 13.5 VDC.
• If no voltage is measured, check for bad wiring.
• If the voltage is less than 10.2 VDC, check for bad wiring or a discharged
starting battery.
• If the voltage is greater than 10.2 VDC, check for proper solenoid
operation.
3. Check for proper solenoid operation.
a. Apply 12 VDC between PT2 and PT1.
b. Listen for solenoid activation. If no audible indication, repeat application of
12 VDC to the leads with fingers on the solenoid body. Repeat applying the
voltage a few times to make sure the solenoid operates correctly.
c. If the solenoid does not activate, replace the fuel pressure regulator or
solenoid in the fuel pressure regulator.
4. Check for fuel leaks at the solenoid. With a soapy water solution, check pipe
threads and areas around the base of the solenoid for gas leakage.
• If a pipe thread is showing bubbles, tighten the pipe connection.
• If anywhere on the gas valve shows bubbles or leakage, replace the
complete gas valve assembly.
Governor Actuator Removal and Installation
GOVERNOR ACTUATOR REMOVAL
1. Shut off AC power to the generator set accessories.