FUEL SYSTEM
Fuel Pump
2000 FE290 Gasoline Vehicle Maintenance and Service Supplement Page 14-21
14
4. If the impulse gasket (27) and the diaphragm (28) come off with the front cover, note their orientations
and remove them (Figure 14-17, Page 14-21).
5. Remove the pumping chamber (30).
6. Remove the back cover (36), the fuel diaphragm (34), and gasket (35) (Figure 14-17, Page 14-21).
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 (Figure 14-17, Page 14-21).
2. Inspect the valve assemblies (31, 32, and 33) and all gaskets and diaphragms for damage.
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 14-17, Page 14-21).
2. Install the valve assembly in the pumping chamber (30). (Figure 14-17, Page 14-21)
3. Install the pumping chamber (30) on top of the fuel diaphragm (34). Be sure the fuel inlet and the fuel
outlet align with the arrows on the front of the front cover (Figure 14-17, Page 14-21).
• FUEL PUMP GASKETS AND DIAPHRAGMS MUST BE REINSTALLED IN EXACTLY THE SAME
POSITIONS AND ORIENTATIONS THEY WERE IN BEFORE DISASSEMBLY, OR THE PUMP
COULD LEAK. IF LEAKING OCCURS, ALL NEW GASKETS AND DIAPHRAGMS MUST BE
INSTALLED.
Figure 14-17 Fuel Pump
Figure 14-18 Fuel Pump Orientation
• IF THE VALVE ASSEMBLY IS NOT INSTALLED EXACTLY AS SHOWN (FIGURE 14-17, PAGE 14-
21), THE IMPULSE FUEL PUMP WILL NOT OPERATE PROPERLY.
CAUTION
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
CAUTION