
117
Maintenance Section
Fuel System Primary Filter (Water Separator) Element - Replace
i01556387
Fuel System Primary Filter
(Water Separator) Element -
Replace
SMCS Code: 1260-510; 1263-510-FQ
S/N: 5SK1990-Up
S/N: 8TK3231-Up
NOTICE
Care must be taken to ensure that fluids are contained
during performance of inspection, maintenance, test-
ing, adjusting and repair of the product. Be prepared to
collect the fluid with suitable containers before open-
ing any compartment or disassembling any compo-
nent containing fluids.
Refer to Special Publication, NENG2500, “Caterpillar
Tools and Shop Products Guide” 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 fill fuel filters with fuel before installing them.
Contaminated fuel will cause accelerated wear to fuel
system parts. Fuel system should be primed prior to
starting the engine.
g00729143
Illustration 189
1. Open the engine access door on the right side
of the machine.
g00284523
Illustration 190
2. Open drain valve (1) on the bottom of water
separator bowl (3). Allow the water and the fuel
to drain into a suitable container.
3. Support the water separator element and rotate
the retaining ring (2) counterclockwise. Remove
the retaining ring (2).
4. Remove the water separator element from the
mounting base.
5. Remove water separator bowl (3) from the filter
element. Clean the water separator bowl and the
O-ring groove.
Note: The water separator bowl is reusable. Do not
discard the water separator bowl.
6. Inspect the O-ring seal on the water separator
bowl. Replace the O-ring seal, if necessary.
7. Lubricate the O-ring seal with clean diesel fuel
or with engine oil. Place the O-ring seal in the
water separator bowl.
8. Install water separator bowl (3) onto the new filter
element by hand until the filter element is snug.
Do not use tools to tighten the filter element.
9. Install the new filter element. Rotate retaining
ring (2) clockwise in order to fasten the filter to
the mounting base. Continue to turn the retaining
ring until an audible click is heard. If a click is
not heard, the retaining ring has not been rotated
far enough and the filter element is not in the
locked position.
10. Close drain valve (1).
Note: The water separator element is under suction
during normal engine operation. Tighten the drain
valve securely in order to prevent air leakage into
the fuel system.