Hummer H1 Service Manual page 168

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FUEL FILTER SERVICE
Fuel Filter Replacement
Removal
1. Loosen the hose clamps securing the CTIS compressor (if
equipped) to its mounting bracket and slide the compres-
sor forward to gain access to the fuel filter.
2. Disconnect fuel inlet and outlet hoses from filter
(Figure 3-40:).
3. Disconnect drain hose from fuel filter.
4. Disconnect filter harness connectors.
5. Remove filter attaching bolts and remove fuel filter from
bracket.
Disassembly
1. Remove retaining nut and filter element from header.
2. Remove sensor and O-ring.
3. Loosen cap nut and remove fuel heater, seal, spring, and
screen.
Assembly
1. Install screen, spring, cap seal, and fuel heater and tighten
cap nut.
2. Install O-ring and sensor.
3. Install filter element and retaining nut.
INLET HOSE
SENSOR HARNESS
FUEL HEATER
HARNESS
MOUNTING
BRACKET
Figure 3-40: Fuel Filter Mounting
5745159
Fuel, Emissions, and Exhaust
Installation
1. Install fuel filter on bracket and secure with washers and
bolts (Figure 3-40:).
2. Connect sensor and fuel heater harnesses to body harness
connectors.
3. Connect drain hose to fuel filter.
4. Connect inlet and outlet hoses to fuel filter.
5. Slide the CTIS compressor rearward into place and tighten
the hose clamps securing the compressor to the mounting
bracket.
Purging Air From Fuel Filter
1. Loosen fuel filter air bleed valve one-half turn (Figure 3-41).
2. Run engine until fuel exits from air valve.
3. Tighten air valve.
FUEL FILTER
OUTLET HOSE
SENSOR
(WATER IN
FUEL)
DRAIN
HOSE
AIR BLEED
VALVE
FILTER
ELEMENT
O-RING
CAP NUT
Figure 3-41: Fuel Filter Components
3-31
ELEMENT
RETAINING NUT
FILTER
HOUSING
SCREEN
SPRING
CAP SEAL
FUEL HEATER