Piper Arrow IV Turbo Maintenance Manual page 313

ADJUSTMENT OF ELECTRIC FUEL PUMP. (In Airplane)
1. With the access panel removed and the fuel selector in the OFF position, remove the fuel line from the
outlet end of the pump.
2. Connect a test line with a bypass valve and pressure gauge to the outlet end of the pump.
3. Place a container below the pump to catch any fuel from the test line during the adjustment of the
pump.
4. Turn the fuel selector on, open the bypass valve on the test line and start the pump.
5. When a steady flow of fuel is obtained, close the bypass valve and check the reading on the pressure
gauge. It should read 26 to 29 psi, no flow. Do not keep bypass valve closed for more than one minute during
pump operation and adjustment.
6. Loosen locknut on adjusting screw and turn screw to obtain the proper pressure of 29 psi maximum,
no flow. Repeat Steps 7 and 8 until adjustment is complete. Lock adjusting screw with locknut.
7. Turn off fuel pump and close fuel selector. Remove the test line from the pump.
8. Reconnect the original fuel line to the pump. Open fuel selector and run the pump to check for any fuel
leaks.
9. Shut off the pump, close the fuel selector, and replace and secure the access panel.
INSTALLATION OF FUEL PUMP.
l. Position the fuel pump inside the cover assembly and secure with cap screws, washers and plate.
2. Connect the fuel lines to the fuel pump.
3. Connect the electrical leads to the pump.
4. Turn the fuel selector on and operate the fuel pump. Check the line fittings for leakage.
5. Install the cowling.
INSPECTION AND TIGHTENING OF FUEL LINE FITTINGS.
1. Remove the aft inboard inspection panel from the lower surface of the right and left wing.
2. Remove the pilot's seat and the left cabin side panel. Fold back the carpeting that covers the forward
side of the spar box and remove the cover from the fuel line. On the 28RT-201T only, pull back the carpeting
from the side of the cabin at the lower aft corner of the door to gain access to the 1/4" fuel vent tubing.
3. Inspect all union fittings in the fuel system for signs of leakage. Make note of any leaking fittings for
later recheck.
4. Using a torque wrench and a tubing crow's foot, carefully tighten each union to the torque listed
below:
Using a crow's foot adapter other than a tubing type will result in
deformation or severe damage to the union nut and will quite
probably cause a leak which will require replacement of the
union and tubing.
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
Tube Size Applied Torque
1/4" OD 75-95 Inch Pounds
3/8" OD 175-195 Inch Pounds
—CAUTION—
Using a Tubing
Crow's Foot
2B10
28-20-19
Page 28-15
Revised: August 17, 1982