Piper Arrow IV Turbo Maintenance Manual page 671

GENERAL.
INSTALLATION OF OIL COOLER.
1. When installing fittings in the oil coolers, care should be used to prevent excessive torque being
applied to the cooler. When a rectangular fitting boss is provided, a backup wrench should be used, employing
a scissor motion, so that no load is transmitted to the cooler. When the oil cooler has a round fitting boss, care
should be taken not to permit excessive torque on the fittings.
2. If a pipe thread fitting is used, it should be installed only far enough to seal with sealing compound.
3. Apply Lubon No. 404 to all male pipe thread fittings; do not allow sealant to enter the system.
4. If fitting cannot be positioned correctly using a torque of 10 to 15 foot-pounds, another fitting should
be used.
5. When attaching lines to the cooler, a backup wrench should be used.
6. After installation, inspect the cooler for distorted end cups.
7. Run-up engine. After run-up, check for oil leaks.
ENGINE OIL QUICK DRAIN VALVE.
When replacing the engine oil quick drain, refer to the Piper Parts Catalog for the correct replacement part
number.
Installation of an incorrect drain could lead to damage of the
sump or drain itself. This may result in loss of engine oil and a
possible engine seizure.
INDICATING.
REMOVAL OF OIL PRESSURE SENSOR.
Access to the sensor unit is gained by reaching up under the instrument panel. Removal is accomplished
by the following:
1. Disconnect the two electrical leads.
2. Unscrew the sensor unit from the bulkhead fitting.
3. Catch spillage and cover hole to prevent foreign matter from entering oil line.
INSTALLATION OF OIL PRESSURE SENSOR.
1. Seal sensor unit pipe threads with thread sealant tape (3M-Teflon No. 48 x 1/4").
2. Screw the sensor unit into the bulkhead fitting.
3. Reconnect the two electrical leads.
4. Perform operational check.
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
—CAUTION—
—END—
3G8
79-30-02
Page 79-01
Revised: December 21, 1981