Operation and maintenance manual
General Safety Instructions QSB4.5 and QSB6.7
Page i-6 Section i - Introduction
General Safety Instructions
Important Safety Notice
WARNING
Improper practices, carelessness, or ignoring the warnings can cause burns, cuts, mutilation, asphyxiation or
other personal injury or death.
Read and understand all of the safety precautions and warnings before performing any repair. This list contains the
general safety precautions that must be followed to provide personal safety. Special safety precautions are included
in the procedures when they apply.
• Work in an area surrounding the product that is dry, well lit, ventilated, free from clutter, loose tools, parts, ignition
sources and hazardous substances. Be aware of hazardous conditions that can exist.
• Always wear protective glasses and protective shoes when working.
• Rotating parts can cause cuts, mutilation or strangulation.
• Do not wear loose-fitting or torn clothing. Remove all jewelry when working.
• Disconnect the battery (negative [-] cable first) and discharge any capacitors before beginning any repair work.
Disconnect the air starting motor if equipped to prevent accidental engine starting. Put a "Do Not Operate" tag in
the operator's compartment or on the controls.
• Use ONLY the proper engine barring techniques for manually rotating the engine. Do not attempt to rotate the
crankshaft by pulling or prying on the fan. This practice can cause serious personal injury, property damage, or
damage to the fan blade(s) causing premature fan failure.
• If an engine has been operating and the coolant is hot, allow the engine to cool before slowly loosening the filler
cap to relieve the pressure from the cooling system.
• Always use blocks or proper stands to support the product before performing any service work. Do not work on
anything that is supported ONLY by lifting jacks or a hoist.
• Relieve all pressure in the air, oil, fuel, and cooling systems before any lines, fittings, or related items are removed
or disconnected. Be alert for possible pressure when disconnecting any device from a system that utilizes
pressure. Do not check for pressure leaks with your hand. High pressure oil or fuel can cause personal injury.
• To reduce the possibility of suffocation and frostbite, wear protective clothing and ONLY disconnect liquid
refrigerant (Freon) lines in a well ventilated area. To protect the environment, liquid refrigerant systems must be
properly emptied and filled using equipment that prevents the release of refrigerant gas (fluorocarbons) into the
atmosphere. Federal law requires capturing and recycling refrigerant.
• To reduce the possibility of personal injury, use a hoist or get assistance when lifting components that weigh 23 kg
[50 lb] or more. Make sure all lifting devices such as chains, hooks, or slings are in good condition and are of the
correct capacity. Make sure hooks are positioned correctly. Always use a spreader bar when necessary. The lifting
hooks must not be side-loaded.
• Corrosion inhibitor, a component of SCA and lubricating oil, contains alkali. Do not get the substance in eyes.
Avoid prolonged or repeated contact with skin. Do not swallow internally. In case of contact, immediately wash
skin with soap and water. In case of contact, immediately flood eyes with large amounts of water for a minimum of
15 minutes. IMMEDIATELY CALL A PHYSICIAN. KEEP OUT OF REACH OF CHILDREN.
• Naptha and Methyl Ethyl Ketone (MEK) are flammable materials and must be used with caution. Follow the
manufacturer's instructions to provide complete safety when using these materials. KEEP OUT OF REACH OF
CHILDREN.
• To reduce the possibility of burns, be alert for hot parts on products that have just been turned off, exhaust gas
flow, and hot fluids in lines, tubes, and compartments.
• Always use tools that are in good condition. Make sure you understand how to use the tools before performing any
service work. Use ONLY genuine Cummins® or Cummins ReCon® replacement parts.
• Always use the same fastener part number (or equivalent) when replacing fasteners. Do not use a fastener of
lesser quality if replacements are necessary.
• When necessary, the removal and replacement of any guards covering rotating components, drives, and/or belts
should only be carried out be a trained technician. Before removing any guards the engine must be turned off and
any starting mechanisms must be isolated. All fasteners must be replaced on re-fitting the guards.
• Do not perform any repair when fatigued or after consuming alcohol or drugs that can impair your functioning.