9-40. INSTALLATION OF ENGINE PRIMER PUMP. (Refer to Figure 9-8.)
a. Remove the pump handle (9) and piston (7) by unscrewing the knurled face nut (10), if previously
installed.
b. Insert the cylinder assembly through the back side of the panel.
c. Insert the piston into the cylinder (5) and tighten the knurled face nut.
d. Position the primer and tighten the locknut ( 12) on the cylinder behind the panel.
e. Connect the fuel lines to the primer.
f. Disconnect the primer line inside the engine compartment. Operate the pump to ascertain proper operation.
9-41. PRIME JETS
a. To remove the prime jets, disconnect the supply line from each jet. With a deep socket and light pressure,
remove the jet from the cylinder.
b. To clean the jets, soak in carbon remover solution long enough to loosen any dirt and blow clean with air
pressure. Do not use sharp objects or wire brush to clean the jet tube.
c. Install the jet finger tight to assure that the threads are not crossed and then torque 60 inch-pounds. Align
and install the fuel supply lines, tighten to a snug fit.
—NOTE—
Should further fuel stoppage of the primer system exist, check the
supply lines for stoppage, bent or collapsed walls.
9-42. CLEANING FUEL SYSTEM.
a. To flush the fuel tanks and selector valve, disconnect the fuel line at the carburetor or injector.
b. Select a fuel tank, turn on the electric fuel pump and flush fuel through the system until it is determined
there is no dirt and foreign matter in the fuel valve or tank. During this operation, agitation of the fuel within the
tank will help pick up and remove any dirt.
c. Repeat this procedure for each tank.
d. When all tanks are flushed, clean all filters.
THIS SPACE INTENTIONALLY LEFT BLANK
PIPER AIRCRAFT
PA-28-161 CADET
AIRPLANE MAINTENANCE MANUAL
Issued: FEBRUARY. 28, 1989
FUEL SYSTEM
2A24