FUEL SYSTEM
Fuel Pump
Page 14-20
2005 FE290 Gasoline Vehicle Maintenance and Service Supplement
14
A
Fuel Pump Disassembly, Continued:
4. Note the orientations of the impulse gasket (27), the diaphragm (28), and the gasket (29), then remove
them from the pump.
5. If the impulse gasket (27) and the diaphragm (28) come off with the front cover, note their orientations
and remove them
(Figure 14-12, Page 14-20)
.
6. Remove the pumping chamber (30).
7. Remove the back cover (36), the fuel diaphragm (34), and gasket (35)
(Figure 14-12, Page 14-20)
.
FUEL PUMP CLEANING AND INSPECTION
1. Using a nonflammable solvent, clean the front cover, pumping chamber, and back cover. Be sure the
vent on the front cover is clean both inside and out.
2. Inspect the valve assemblies (31, 32, and 33) and all gaskets and diaphragms for damage
(Figure 14-12, Page 14-20)
.
3. If a valve assembly is damaged, the rubber retaining plug (33) and valve assembly must be replaced.
FUEL PUMP ASSEMBLY
1. Install the fuel gasket (35) and diaphragm (34) on the back cover (36)
(Figure 14-12, Page 14-20)
.
2. Install the valve assembly in the pumping chamber (30).
See following CAUTION.
ý
CAUTION
• If the valve assembly is not installed exactly as shown (Figure 14-12, Page 14-20), the impulse
fuel pump will not operate properly.
3. Install the pumping chamber (30) on top of the fuel diaphragm (34). Be sure the fuel inlet and the fuel out-
let align with the arrows on the front of the front cover
(Figure 14-12, Page 14-20)
.
Figure 14-12 Fuel Pump
Figure 14-13 Fuel Pump Orientation
FRONT
COVER
VENT
FUEL
OUTLET
FUEL
INLET
VALVE
ASSEMBLY
PUMPING
CHAMBER
BACK
COVER
24
32
31
30
35
34
36
33
25
27
28
29
FUEL
OUTLET
VENT
DIRECTION
OF FUEL
FLOW
IMPULSE
LINE
FUEL INLET