DISTRIBUTION (Cont.)
VACUUM SYSTEM SERVICE TIPS (Cont.)
3. Gyro Filters:
a. Gyro filters must be serviced on a scheduled basis, not to exceed 100 hours, or sooner as
condition indicates.
b. The system installation employs a large central filter and differential vacuum gauge that
continuously monitors filter condition while indicating vacuum readings.
– NOTE –
The system employs a central filter in combination with a dif-
ferential vacuum gauge and will indicate a decline in panel
gauge reading when filter becomes clogged. Filters should be
replaced when gauge reading declines; DO NOT adjust
regulator.
4. Vacuum Regulator:
a. Vacuum regulating valve seldom needs replacement. Symptoms that suggest replacement are:
(1) Chatter as indicated by rapid fluctuation of vacuum gauge needle or an audible sound.
(2) Non-repeatability of vacuum gauge reading when panel gauge is not suspect or has been
checked against a known test gauge (cruise RPM only).
b. All modes of regulator malfunction tend to increase vacuum power applied to gyros. Thus,
although excess vacuum is applied, a loss of vacuum does not occur.
c. Gyros themselves act as a limiting device to keep vacuum power applied from exceeding safe
levels.
– NOTE –
If panel gauge has been checked and found OK and vacuum
gauge reading does not repeat within range of 4.8 to 5.2 inches
of mercury, then regulating valve should be changed. Observe
usual precautions for maintaining system cleanliness to avoid
premature pump service.
VACUUM PUMP
Vacuum pump is of rotary vane, positive displacement type. This unit consists essentially of an aluminum
housing, a carbon rotor and carbon vanes. This assembly is driven by means of a coupling mated to engine
driven gear assembly. Pump is mounted on accessory section of engine.
PIPER AIRCRAFT
PA-32R-301/301T
MAINTENANCE MANUAL
37-10-00
Page 37-6
Reissued: July 1, 1993
3G13
Summary of Contents for PA-32R-301T SARATOGA S
Page 26: ...CHAPTER 4 AIRWORTHINESS LIMITATIONS 1C1 ...
Page 29: ...CHAPTER 5 TIME LIMITS MAINTENANCE CHECKS 1C4 ...
Page 53: ...CHAPTER 6 DIMENSIONS AND AREAS 1D6 ...
Page 64: ...CHAPTER 7 LIFTING AND SHORING 1D21 ...
Page 68: ...CHAPTER 8 LEVELING AND WEIGHING 1E1 ...
Page 72: ...CHAPTER 9 TOWING AND TAXIING 1E5 ...
Page 76: ...CHAPTER 10 PARKING AND MOORING 1E9 ...
Page 80: ...CHAPTER 11 REQUIRED PLACARDS 1E13 ...
Page 92: ...CHAPTER 12 SERVICING 1F1 ...
Page 126: ...CHAPTER 20 STANDARD PRACTICES AIRFRAME 1G17 ...
Page 127: ...THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 139: ...CHAPTER 21 ENVIRONMENTAL SYSTEMS 1H5 ...
Page 188: ...CHAPTER 22 AUTOFLIGHT 1J7 ...
Page 193: ...CHAPTER 23 COMMUNICATIONS 1J12 ...
Page 203: ...CHAPTER 24 ELECTRICAL POWER 1J22 ...
Page 263: ...CHAPTER 25 EQUIPMENT FURNISHINGS 2A13 ...
Page 269: ...CHAPTER 27 FLIGHT CONTROLS 2A20 ...
Page 332: ...CHAPTER 28 FUEL 2D11 ...
Page 363: ...CHAPTER 29 HYDRAULIC POWER 2E18 ...
Page 404: ...CHAPTER 30 ICE AND RAIN PROTECTION 2G16 ...
Page 470: ...CHAPTER 32 LANDING GEAR 3A13 ...
Page 550: ...CHAPTER 33 LIGHTS 3D24 ...
Page 562: ...CHAPTER 34 NAVIGATION AND PITOT STATIC 3E12 ...
Page 582: ...CHAPTER 35 OXYGEN 3F8 ...
Page 604: ...CHAPTER 37 VACUUM 3G6 ...
Page 616: ...CHAPTER 39 3G18 ELECTRIC ELECTRONIC PANELS MULTIPURPOSE PARTS ...
Page 620: ...CHAPTER 51 STRUCTURES 3G22 ...
Page 636: ...CHAPTER 52 DOORS 3H14 ...
Page 650: ...CHAPTER 55 STABILIZERS 3I4 ...
Page 662: ...CHAPTER 56 WINDOWS 3I16 ...
Page 670: ...CHAPTER 57 WINGS 3I24 ...
Page 688: ...CHAPTER 61 PROPELLER 3J18 ...
Page 704: ...CHAPTER 70 STANDARD PRACTICES ENGINES 3K10 ...
Page 708: ...CHAPTER 71 POWER PLANT 3K14 ...
Page 737: ...CHAPTER 73 ENGINE FUEL SYSTEM 4A13 ...
Page 749: ...CHAPTER 74 IGNITION 4B1 ...
Page 783: ...CHAPTER 77 ENGINE INDICATING 4C11 ...
Page 793: ...CHAPTER 78 EXHAUST 4C21 ...
Page 801: ...CHAPTER 79 OIL 4D5 ...
Page 805: ...CHAPTER 80 STARTING 4D9 ...
Page 819: ...CHAPTER 81 TURBINES 4D23 ...
Page 833: ...CHAPTER 91 CHARTS WIRING DIAGRAMS 4E13 ...