
147
WEBM1000 Maintenance Section (D6T LGP (OEM))
Fuel Priming Pump - Replace
Fuel Priming Pump - Replace
191
Illustration 191
A replacement kit is available for the electronic fuel
priming pump. Contact your Cat dealer for the
correct part number and details for your application.
Fuel System - Prime
Personal injury or death can result from a fire.
Fuel leaked or spilled onto hot surfaces or
electrical components can cause a fire.
Clean up all leaked or spilled fuel. Do not smoke
w
hile w
orking on the fuel system.
Turn the disconnect switch OFF or disconnect
the battery when changing fuel filters.
NOTICE
Care must be taken to ensure that fluids are
contained
during performance of inspection,
maintenance, testing, adjusting and repair of the
product. Be prepared to collect the fluid with suitable
containers before opening any compartment or
disassembling any component containing fluids.
Refer to Special Publication, NENG2500
“Caterpillar
Dea
ler Service Tool Catalog” for tools and supplies
suitable to collect and contain fluids on Caterpillar
products.
Dispose of all fluids according to local regulations
and mandates.
NOTICE
Do not loosen the fuel lines at the fuel manifold. The
fitting
s may be damaged and/or a loss of priming
pressure may occur when the fuel lines are
loosened.
NOTICE
Do not allow dirt to enter the fuel system. Thoroughly
clean t
he area around a fuel system component that
will be disconnected. Fit a suitable cover over
disconnected fuel system component.
Prime the fuel system in order to fill the fuel filter, and
prime the fuel system in order to purge trapped air.
The fuel system should be primed under the
following conditions:
• The injector has been changed.
• The fuel filter has been changed.
• The fuel system is dry.
1. T
urn the engine start switch to the ON position.
Leave th
e engine start switch in the ON position
for 2 minutes.
192
Illustration 192
2. Verify that the water separator is full of fuel.
3. If the water separator is not full of fuel, turn the
engine star
t switch OFF and then turn the engine
start switch ON. This operation will cycle the fuel
priming pump again.
4. Wh
en the water separator is full of fuel, attempt
to sta
rt the engine. If the engine starts and the
engine runs rough or the engine misfires,
operate at low idle until the engine is running
smoothly. If the engine cannot be started, or if
the engine continues to misfire or smoke, repeat
Step 1.