d. Reinstall the pump in reverse order of removal, noting the following:
CA
UTION: THE ONLY DRY AIR PUMP MOUNTING GASKET AUTHORIZED AND
APPROVED FOR USE ON AIRBORNE DRY AIR PUMP IS THE AIRBORNE
GASKET B3-1-2, PIPER PART NUMBER 751-859. USE OF ANY OTHER
GASKET MAY RESULT IN OIL SEEPAGE OR LEAKAGE AT THE MOUNTING
SURFACE.
1. Place gasket in proper position.
2. Torque the four mounting nuts to 40–50 inch-pounds.
e. Check hose connections and mounting hardware for security.
10-17a. REPLACING PUMP FITTINGS.
CA
UTION: WHEN REPLACING ANY OF THE THREADED FITTINGS, DO NOT USE PIPE
DOPE, THREADLUBE, OR TAPE. PIPE DOPE / TAPE PARTICLES INGESTED BY
THE VACUUM PUMP COULD CAUSE THE PUMP TO FAIL. USE ONLY SILICONE
SPRAY, LETTING IT DRY BEFORE ASSEMBLY.
1. Before installing any fittings on pump, check for any external damage. A pump that has been
damaged or dropped should not be installed.
CA
UTION: DO NOT APPLY VISE PRESSURE TO OUTSIDE DIAMETER OR OVERALL
LENGTH OF PUMP.
2. When a vise is used to hold pump while installing fittings, suitable caution must be exercised to
avoid pump damage. Square mounting flange must be held between soft wood blocks and only at
right angles to vise jaws. Use only enough vise pressure to hold pump firmly.
3. The ports of AIRBORNE pumps have been treated with a dry film lubricant and AIRBORNE
fittings are cadmium plated thus eliminating any need for thread lubricants. If thread lubricant is
required, use only a silicone spray. Apply sparingly to external threads of fittings only and let dry
before assembly.
PIPER SENECA II SERVICE MANUAL
X - INSTRUMENTS 01/01/09
2E14F
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