Teledyne Continental Motors, Inc.
TM
Non-Overhaul Removal and Replacement
IOF-240 Series Engine Maintenance Manual
10-7
29 November 2006
10-2.
Fuel Pump Replacement
10-2.1. Fuel Pump Removal
Procedure
WARNING
If engine electrical power is not disconnected, a faulty ignition
circuit could allow the engine to start and the propeller to
rotate. Do not stand or place equipment within the arc of the
propeller.
1.
Disconnect the fuel hose connections at the fuel pump fittings. Note the orientation of
the fittings in the fuel pump.
2.
Disconnect electrical power to the engine and verify the Ignition Switch is turned
OFF.
3.
Remove the attaching hardware and gasket; discard the gasket.
4.
Inspect the fuel pump drive coupling IAW the Fuel Pump Drive Coupling Service
Limits in Table 10-4. Replace parts which do not meet service limit specifications.
1
3
2
4
8
5
6, 7
Figure 10-1.
Fuel Pump Drive Coupling
Table 10-4.
Fuel Pump Drive Coupling Fits & Limits
Item No.
Figure 10-1
Description
Service Limits
(inches)
1
Fuel pump adapter pilot in crankcase diameter:
0.006L
2
Fuel pump body pilot in adapter diameter:
0.0045L
3
Oil seal in adapter diameter:
0.002T
4
Fuel pump drive shaft in impeller shaft diameter:
0.016L
5
Fuel pump drive shaft in vacuum pump drive gear tooth clearance:
0.060L
6
Vacuum pump driven gear in crankcase clearance
0.005
7
Vacuum pump driven gear bore in crankcase diameter
0.8155
8
Vacuum pump drive gear to camshaft gear backlash:
0.014
T= Tight L =Loose