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PIPER CHEROKEE SIX / LANCE SERVICE MANUAL
03/27/08
IX - INSTRUMENTS
2K11
9-17.
REMOVAL AND REPLACEMENT.
a.
Remove the top portion of the engine cowling.
b.
Loosen the hose clamp and remove the hose from the vacuum pump fitting.
c.
Remove the vacuum pump by removal of the four retaining nuts, lockwasher and plain washers.
CAUTION: A PUMP THAT HAS BEEN DAMAGED OR DROPPED SHOULD NOT BE
INSTALLED.
NOTE: Change the vacuum system filter when installing a new pump.
d.
Install AIRBORNE Vacuum Pump (Original Equipment):
1.
If required, install fittings on pump per Replacing Pump Fittings, below.
2.
Place the pump gasket in its proper place and align the spline on the pump drive, with spline
on engine drive assembly.
CAUTION: THE ONLY PUMP MOUNTING GASKET AUTHORIZED AND APPROVED
FOR USE ON THE AIRBORNE VACUUM 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.
3.
Secure the pump to the engine with four plain washers, lock washers and retaining nuts.
Torque the nuts 40 to 50 inch-pounds.
4.
Connect the hoses to the pump and secure with hose clamps.
5.
Reinstall the engine cowling.
e.
Install AERO ACCESSORIES Vacuum Pump (Service Replacement):
NOTE: If Aero Accessories Tempest Pumps are installed, see Special Inspections, Procedures for
Vane Wear inspection.
1.
If required, install fittings on pump per Replacing Pump Fittings, below.
2.
Place pump gasket in its proper place and align the spline on the pump drive, with spline on
engine drive assembly.
3.
Secure pump to engine with four plain washers, lock washers and retaining nuts. Torque nuts
50 to 70 inch-pounds.
4.
Connect hoses to pump and secure with hose clamps.
5.
Reinstall the engine cowling.
9-17a. REPLACING PUMP FITTINGS.
CAUTION: 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.
CAUTION: A PUMP THAT HAS BEEN DAMAGED OR DROPPED SHOULD NOT BE
INSTALLED.
a.
Before installing any fittings on the pump, check for any external damage.
Summary of Contents for Cherokee LANCE
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