Piper ARROW III Service Manual

2F19
TABLE X-I. TROUBLESHOOTING CHART (VACUUM SYSTEM)
No vacuum gauge indication Open vacuum line. Locate and repair.
at instrument.
Faulty instrument. Replace.
No vacuum gauge indication Faulty gauge or Replace gauge or
at instrument of source. malfunctioning pump. replace pump.
Low vacuum system Filter dirty. Clean or replace filter.
indication.
Vacuum regulator valve Adjust regulator valve per
not adjusted properly. adjustments in this section.
Gyro to filter line Repair or replace line.
restricted.
Pump to gyros line Check all lines and
leaking. fittings.
Abnormal gyro precession - Dirty filter. Replace filter first, then
vacuum gauge reading adjust regulator.
correct or a maximum
pressure.
Normal vacuum indication Faulty instrument. Replace instrument.
but sluggish operation of
instruments. Dirty or clogged filter or Replace filter.
vacuum line kinked. Replace damaged lines.
High system vacuum. Vacuum regulator Adjust regulator.
incorrectly adjusted.
Dirty or clogged filter. Replace filter.
Vacuum lines kinked or Repair or replace lines.
restricted.
Vacuum regulator sticking Clean and check operation
or dirty screen. of regulator.
Regulator cannot be Lines leaking. Check lines and fittings.
adjusted for correct
vacuum pressure. Vacuum pump Replace pump.
malfunctioning.
Vacuum connect on ground Vacuum pump Replace pump.
but not normal at altitude. malfunctioning.
Regulator sticky. Clean or replace regulator.
Trouble Cause Remedy
Revised: 2/13/89
CHEROKEE ARROW III SERVICE MANUAL
INSTRUMENTS

Piper ARROW III Specifications

General

Manufacturer	Piper Aircraft
Model	ARROW III
Engine	Lycoming IO-360-C1C6
Horsepower	200 hp
Maximum Takeoff Weight	2, 750 lb (1, 247 kg)
Seating Capacity	4
Propeller	2-blade, constant speed
Length	24 ft 7 in (7.49 m)