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
7. Troubleshooting10-2019
139A062J683 (Issue 1) Copyright © 2019 Cummins Inc.
b. If there is no output and battery voltage is less than 13.8 ±0.5 VDC, stop
the generator set and disconnect the 4-pin plug going to the flywheel
regulator.
i. Connect an AC voltmeter across the pins of the plug connected to the
yellow wires supplying AC power to the regulator from the flywheel
alternator.
ii. Verify 50 ±5 VAC across the yellow wires.
• If 50 ±5 VAC is not available:
◦ Verify that the blue wire of the flywheel alternator is at
ground.
◦ If 50 ±5 VAC is still not available, replace the flywheel
alternator.
• If 50 ±5 VAC is available, replace the voltage regulator.
7.8 Fuel Shutoff Solenoid Valve
When the engine is cranking or running, 12 VDC battery voltage is sent to the
solenoid energizing the coil and causing the solenoid to retract (open) the valve.
When the engine is stopped, the 12 VDC is removed, causing the valve to close
and preventing any fuel from passing through.
FIGURE 70. FUEL SHUTOFF SOLENOID VALVE
7.9 Compression Test Procedure
The procedure below provides the necessary tooling and steps to perform a
compression test on the engine. The steps must be performed in order for the test
to be accurate. Compare the test results of each cylinder to the following
specifications.