Chevrolet Light Duty Truck 1973 Service Manual page 465

a. Attach a fuel pump pressure test gauge to
disconnect end of pipe.
b. Run engine at approximately 450-1,000 rpm .(on
gasoline in carburetor bowl) and note reading
on pressure gauge.
c. If pump is operating properly the pressure will
be within specifications and will remain constant
at speeds between 450-1,000 rpm. If pressure is
too low, too high, or varies significantly at
different speeds, the pump should be replaced.
REMOVAL
NOTE: When connecting fuel pump outlet
pipe fitting always double wrench to avoid
possible damage of pump.
1. Disconnect fuel inlet and outlet pipes at fuel pump.
2. Remove fuel pump mounting bolts and remove
pump and gasket.
. On V engines if push rod is to be removed, remove
3 8
pipe plug and push rod (454 cu. in. engines), and fuel
pump adapter and gasket and push rod (307, 350 and
400 cu. in. engines).
Fig. 2P--Fuel Pump and Pipe, V-8
Fig. 3P--Fuel Pump (Non-Serviceable)
INSTALLATION
1. On V engines, if fuel pump push rod has been
8
removed, install push rod and pipe fitting or fuel
pump adapter using gasket sealer on gasket or pipe
fitting.
2. Install fuel pump using a new gasket and tighten
securely. Use sealer on fuel pump mounting bolt
threads.
NOTE: On V engines, a pair of mechanical
8
fingers or heavy grease may be used to hold
fuel pump push rod while installing fuel
pump (fig. 4P).
3. Connect fuel pipes to pump.
4. Start engine and check for leaks.
E N G IN E FUEL 6 M -41
LIGHT DUTY TRUCK SERVICE MANUAL