Peterbilt 535 - Frame

• Bowl wrench RK61680
•
1" wrench
• New PACCAR primary fuel filter
element designed for this
application
• 2 new O-rings
Start procedure with engine off. Cover any
electrical equipment and wiring that might
get soaked with fuel; diesel fuel may
permanently damage electrical insulation.
To expel air from density-type strainer
elements, soak them in clean fuel before
installing them. Lubricate new O-rings with
clean fuel to ensure a positive seal.
1. Disconnect clip-type electrical
connections from bowl bottom:
a. Disconnect water in fuel (WIF)
sensor from wire bundle.
b. Disconnect electrical heater
sensor from wire bundle.
2. Using bowl wrench, loosen filter
bowl and lower at least 2 inches.
Take care not to damage bowl
sensors on surrounding
components.
3. Slowly remove bowl and filter from
upper filter assembly.
4. Remove the filter element and both
upper and lower O-rings.
5. Install new filter element:
a. Install new upper and lower
O-rings.
b. Install new fuel filter element.
6. Reconnect clip-type electrical
connections to bowl bottom:
a. Reconnect water in fuel (WIF)
sensor to wire bundle.
b. Reconnect electrical heater
sensor to wire bundle.
7. If your vehicle has a fuel blending
valve, turn valve to “Prime.”
8. Prime fuel filter assembly:
• If your assembly contains a
manual priming pump (PX-7
engines) press priming pump
repeatedly until pumping action
becomes firm, or
• Allow the electric priming pump
to prime assembly (non PX-7
engines).
9. Start the vehicle.
For PX-7 and PX-9 engines, idle
for 5 minutes.
10. If your vehicle has a fuel blending
valve, turn valve to “Run.”
Observe fuel filter assembly for leaks.
Dispose of old filter element and O-rings
properly.
Fuel Tank
Frame
WARNING
DO NOT cut, splice or weld frame rails
or
drill through the top or bottom flang-
es of the rails. These operations could
affect frame rail strength leading to a
failure resulting in an accident. Rail
failures resulting from such modifica-
tions are not warrantable. Failure to
comply may result in property damage,
personal injury, or death.
MAINTENANCE - Frame
250 Y53-6113-1A1 (11/20)
5