Operation and maintenance manual

Cummins®/Fleetguard® Filter Specifications QSB4.5 and QSB6.7
Page V-8 Section V - Maintenance Specifications
Cummins®/Fleetguard® Filter Specifications
General Information
Fleetguard®/Nelson® is a subsidiary of Cummins Inc. Fleetguard®/Nelson® filters are developed through joint testing
at Cummins® and Fleetguard®/Nelson®. Fleetguard®/Nelson® filters are standard on new Cummins® engines.
Cummins Inc. recommends their use.
Fleetguard®/Nelson® products meet all Cummins® Source Approval Test standards to provide the quality filtration
necessary to achieve the engine's design life. If other brands are substituted, the purchaser must insist on products
that the supplier has tested to meet Cummins Inc. high-quality standards.
Cummins Inc. can not be responsible for problems caused by non-genuine filters that do not meet Cummins Inc.
performance or durability requirements.
Filter Part Numbers
Lubricating Oil Filter
Cummins® Part Number 3937736
Fleetguard®/Nelson® Part Number LF3970
Fuel Filter (Primary)
Cummins® Part Number 3978040
Fleetguard®/Nelson® Part Number FF5421
Fuel Filter (Prefilter with WIF Sensor)
Cummins® Part Number 3973233
Fleetguard®/Nelson® Part Number FS19732