Perform these maintenance procedures when indicated by the Preventative Maintenance Schedule.
WARNING
When removing the fuel filter, a quantity of fuel will escape. DO NOT smoke or allow an open flame in close proximity. Failure to do
so could ignite a fire or cause an explosion which could result in serious injury to you and/or bystanders. Failure to comply may result
in death, personal injury, equipment or property damage.
CAUTION
Replace fuel filters with parts of the same part number. PACCAR periodically changes its filter design, and filters of different part
numbers are not interchangeable. Use of incorrect filter part numbers or non-genuine filters can result in low pressure fuel fault co-
des and/or severe engine damage. Contact a Kenworth or Peterbilt dealer to verify the correct fuel filter part numbers.
NOTE
The fuel filter and the hand pump are located on the left-hand side of the engine, as viewed from the driver's seat.
NOTE
Use of poor quality fuel may require more frequent fuel filter element service.
Description
The fuel filter/water separator module provides fine-particle filtration, water separation, water-in-fuel sensing, 12V
preheating and system manual priming in a singular easy to service module.
Replace the suction side and the pressure side fuel filters at the same time. It is recommended to replace the fuel filters at
the same interval as the oil and oil filter are changed. If the oil drain interval being used is greater than 15,000 mi (24,000
km), as determined by the Engine Lubrication and Filter Intervals, the fuel filter change can be extended until the oil drain
interval.
Biodiesel
For information on alternative fuels, such as biodiesel, and additional information for fuel recommendations and
specifications refer to "Fuels for Cummins® Engines," Bulletin 3379001.
For information on alternative fuels, such as biodiesel, and additional information for fuel recommendations and
specifications, see Warranty and the Use of Biodiesel Fuel on page 21.
Fuel Filter Recommended Tools
The following tools are recommended for replacing fuel filters:
• Container suitable to drain diesel fuel into
• Fuel filter bowl wrench (as appropriate for the specific application)
• 32mm hexagonal socket
• Torque wrench capable of 30 lb-ft ± 6 (40 N·m ± 8)
• Sufficient clean diesel fuel to lubricate filter seals and fill the chassis mounted filter bowl
• Clean, lint-free cleaning cloths
• Mity-Vac Fuel Priming/Bleeding kit available through PACCAR dealers (optional but highly recommended)
Chassis Mounted Fuel Filter Replacement
Refer to supplier manuals for fuel filter replacement instructions.
• DAVCO documentation is available at http://www.davcotec.com/documents.htm.
• RACOR documentation is available at https://www.parker.com.
1. Turn off the engine and allow it to cool until it can be touched.
CHAPTER 2: FUEL FILTER - Fuel Filter Recommended Tools
10 SM044-004 (01/2021)
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