Fuel Priming Pump - Remove

This article is about how to disassemble the fuel filter base

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Removal Procedure
1. Turn the fuel supply to the OFF position.
2. Turn the battery disconnect switch to the OFF
position.
3. For the correct location of the fuel priming pump
assembly. Refer to Original Equipment
Manufacturer (OEM) for the correct location.

4. Remove fuel filter (9). Refer to Operation and
Maintenance Manual, Fuel System Primary Filter
(Water Separator) Element - Replace for the
correct procedure.
5. Disconnect harness assembly (2), harness
assembly (3), and harness assembly (8).

6 M0070446
Disassembly and Assembly Section

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9. If necessary, follow Step 9.a through Step 9.j to
disassemble the assembly of fuel filter base (1).
a. Place the assembly of fuel filter base (1) in a
suitable support.
b. Remove nut (21) and remove solenoid (22).
c. Use a deep socket to remove valve (23).
Remove O-ring seal (24), O-ring seal (25), and
backing ring (26).
d. Remove check valve (35). Remove O-ring seal
(30), O-ring seal (29), and backing ring (28)
e. Remove bolts (27) from manifold (34). Remove
O-ring seal (33).
f. Remove O-ring seal (19) and backing ring (20).
g. Make temporary marks on wiring harness (37)
for installation purposes. Remove locking nuts
(32). Remove electronic filter (31) and
disconnect the wiring harness from pump
assembly (43).
h. Remove pump assembly (43) from fuel filter
base (1). Remove backing ring (40), seal (41),
backing ring (42), and seal (39).
i. If necessary, remove circlip (36) and remove
wiring harness (37) from fuel filter base (1).
6 M0070446
Disassembly and Assembly Section
Remove O-ring seals (38).
j. If necessary, remove plug (48) from fuel filter
base (1). Remove O-ring seal (47). Remove
spring (46), valve (45), and O-ring seal (44).
If necessary, repeat Step 9.j to remove
remaining valve assembly (49).
Installation Procedure
1. Ensure all the components of the fuel priming
pump assembly are free from wear, damage, and
restriction.
Illustration 5 g06096521
M0070446

Correct orientation of fuel priming pump (44).
Correct position of electronic filter (32)
Position (A) is the negative (-) terminal on fuel priming
pump (44)
Position (B) is the positive (+) terminal on fuel priming
pump (44)
2. If necessary, follow Step 2.a through Step 2.m to
assemble the assembly of fuel filter base (1).
Note: Use the pump seal installer that is provided
in the pump kit to press in the new pump and the
seals.
a. Place the assembly of fuel filter base (1) in a
suitable support.
b. If necessary, install new O-ring seals (38) to
wiring harness (37). Install the wiring harness to
fuel filter base (1). Ensure that the wiring
harness is correctly installed into the fuel filter
base. Install circlip (36) to the fuel filter base.
Ensure that the circlip is correctly installed into
the recess of the fuel filter base.
c. Install new seal (39), backing ring (42), seal
(41), backing ring (40) to pump assembly (43).
d. Install pump assembly (43) to fuel filter base (1).
Ensure that the pump assembly is installed
into the fuel filter base squarely, is correctly
seated, and is correctly orientated into the
fuel filter base. Refer to Illustration 7 for the
correct orientation.
e. Connect wiring harness (37) to pump assembly
(43). Ensure that the harness assembly is
correctly connected to the pump assembly.
Refer to Illustration 7 .
f. Install electronic filter (31) to pump assembly
(43). Refer to Illustration 7 . Install new locking
nuts (32). Tighten the locking nuts to a torque of
1.3 N·m (1 lb ft)
g. Install new O-ring seal (19) and backing ring
(20) to pump assembly (43). Ensure that the Oring seal and the backing ring are correctly
installed.
h. Install a new O-ring seal (33) to fuel filter base
(1). Install manifold (34). Install bolts (27).
Tighten the bolts to a torque of 12 N·m
(106 lb in).
i. Install new O-ring seal (24), O-ring seal (25),
and backing ring (26) to valve (23). Ensure that
the O-ring seal and the backing ring are
correctly positioned.
j. Use a deep socket to install valve (23). Tighten
the valve to a torque of 50 N·m (37 lb ft).
k. Install solenoid (22) to valve (23). Install nut
(21). Tighten the torque to 6.5 N·m (58 lb in)
l. Install new O-ring seal (30), O-ring seal (29),
and backing ring (28) to check valve (35). Install
the check valve to manifold (35). Tighten the
check valve to a torque of 34 N·m (301 lb in).
m. If necessary, install a new O-ring seal (47) to
plug (48). Install a new O-ring seal (44) onto
valve (45). Install the valve, spring (46), and the
plug to fuel filter base (1). Tighten the plug to a
torque of 90 N·m (66 lb ft).
If necessary, repeat Step 2.m to install
remaining valve assembly (50).

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3. If necessary, follow Step 3.a through Step 3.c to
install mounts (13), mounts (10), limiters (16),
limiter (11), and bracket (14) to fuel filter base (1).
a. Install mount (10), limiter (11) and mount (12) to
fuel priming pump (1).
b. Install limiters (16) and mounts (17) and mounts
(15) to fuel priming pump (1).
c. Install bracket (14) and mounts (13).
4. Position fuel priming pump base (1) onto the OEM
mounting point. Install bolts (6) and washers (5) to
the fuel priming pump base. Tighten the bolts to a
torque of 27 N·m (239 lb in).
5. Connect harness assembly (2), harness assembly
(3), and harness assembly (8).
6. Install a new fuel filter (9). Refer to Operation and
Maintenance Manual, Fuel System Primary Filter
(Water Separator) Element - Replace for the
correct procedure.
7. Turn the fuel supply to the ON position.
8. Turn the battery disconnect switch to the ON
position.
9. Remove plug and cap from the connections and
the hose assemblies. Connect the OEM hose
assemblies to the connections (4) Tighten the
hose assemblies, refer to the OEM for the correct
torque value.
10. Remove cap from connection (4a) and connect
the OEM hose assemble. Tighten the hose
assemblies, refer to the OEM for the correct torque
value.
11. Follow Step 11.a through Step 11.c to flush the
fuel pump and the hose assembly for the supplies
to the Aftertreatment Regeneration Device (ARD).
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Disassembly and Assembly Section
a. Disconnect the hose assembly from the ARD.
Use two people to flush the fuel pump and the
hose assembly for the supplies to the ARD into
a suitable container for disposal.
b. The fuel pump can be activated by turning on
the key or pressing the manual switch. The
manual switch, if available, the switch is on the
primary fuel filter base.
c. After the flushing procedure has been carried
out, connect the hose assembly to the ARD.
Tighten the hose assemblies, refer to the OEM
for the correct torque value.