CAUTION: IF THE STAR WASHER IS NOT REMOVED WITH THE PLUG, THE
SUBSEQUENT WEAR INDICATION READING WILL BE
ERRONEOUS.
4. Remove the inspection port plug and star washer (View A).
5. While looking into the inspection port, have an assistant slowly turn the propeller by hand
in the normal direction of rotation until a vane slot is centered in the port (View B).
NO
TE: If you go too far, just keep turning the propeller until the next vane slot appears.
DO NOT turn the propeller backwards.
CA
UTION: DO NOT ROTATE PROPELLER OR PUMP SHAFT WITH THE
INDICATING TOOL INSERTED INTO THE INSPECTION PORT. IF THE
PUMP IS INADVERTENTLY ROTATED WHILE THE INDICATING
TOOL IS INSERTED INTO THE INSPECTION PORT, PUMP
REPLACEMENT IS REQUIRED - EVEN IF YOU CAN DETECT NO
DAMAGE.
6. Insert the vane wear indicating tool into the inspection port as illustrated in View C.
a. Hold the barrel securely and squarely against the pump body.
b. With your finger tip, gently push the plunger into the pump. When the plunger
touches the vane you may feel the vane move slightly if it is not at the bottom of its
slot.
NO
TE: If the plunger does not slip easily into the slot, DO NOT force it. Remove
the indicating tool and check the alignment of the vane slot to the inspection
port.
7. Compare the relative positions of the plunger land and barrel top to the illustrations in
View D to determine vane wear.
a. If vane is “worn out,” replace pump.
b. If vane is “still good” or “new,” proceed to next step.
8. If vanes are within service limits and pump is otherwise serviceable, clean the threads on
the inspection port plug, install a new star washer and torque the port plug to 45–50 in.-lbs.
10-17. REMOVAL AND INSTALLATION.
a. Remove the top portion of the engine cowling.
b. Disconnect the two hoses at the pump.
c. Remove the four mounting nuts, lockwashers and plain washers, and withdraw the pump from the
engine.
PIPER SENECA II SERVICE MANUAL
01/01/09 X - INSTRUMENTS
2E14E
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