Operation and maintenance manual

General Repair Instructions QSB4.5 and QSB6.7
Page i-8 Section i - Introduction
General Repair Instructions
General Information
This engine or system incorporates the latest technology at the time it was manufactured; yet, it is designed to be
repaired using normal repair practices performed to quality standards.
WARNING
Cummins Inc. does not recommend or authorize any modifications or repairs to components except for those
detailed in Cummins Service Information. In particular, unauthorized repair to safety-related components can
cause personal injury or death. Below is a partial listing of components classified as safety-related:
1 Air Compressor
2 Air Controls
3 Air Shutoff Assemblies
4 Balance Weights
5 Cooling Fan
6 Fan Hub Assembly
7 Fan Mounting Bracket(s)
8 Fan Mounting Capscrews
9 Fan Hub Spindle
10 Flywheel
11 Flywheel Crankshaft Adapter
12 Flywheel Mounting Capscrews
13 Fuel Shutoff Assemblies
14 Fuel Supply Tubes
15 Lifting Brackets
16 Throttle Controls
17 Turbocharger Compressor Casing
18 Turbocharger Oil Drain Line(s)
19 Turbocharger Oil Supply Line(s)
20 Turbocharger Turbine Casing
21 Vibration Damper Mounting Capscrews
22 Manual Service Disconnect
23 High Voltage Interlock Loop
24 High Voltage Connectors/Connections and Harnesses
25 High Voltage Battery System
26 Power Inverter
27 Generator Motor
28 Clutch Pressure Plate
• Follow all safety instructions noted in the procedures
• Follow the manufacturer's recommendations for cleaning solvents and other substances used during repairs. Some
solvents have been identified by government agencies as toxic or carcinogenic. Avoid excessive breathing,
ingestion and contact with such substances. Always use good safety practices with tools and equipment
• Provide a clean environment and follow the cleaning instructions specified in the procedures
• The engine or system and its components must be kept clean during any repair. Contamination of the engine,
system or components will cause premature wear.
• All components must be kept clean during any repair. Contamination of the components will cause premature
wear.