COOLING (cont.)
L. Evacuating System (cont.)
Chart 4. System Vacuum Chart
(1) Remove access panel at the rear of cabin to gain access to the Schrader service valves.
— CAUTION —
Ensure that all system pressure is released before attempting
the evacuation. (Refer to Special Serving Procedures)
(2) Connect manifold gauge set to airplane service valves. (Refer to Service Valves.)
(3) Ensure high and low manifold hand valves are in closed position. (Refer to Figures 21-5 and 21-6.)
(4) Connect center manifold hose to vacuum pump inlet.
— NOTE —
Make sure exhaust port on vacuum pump is open to avoid
pump damage.
(5) Start vacuum pump and open manifold low side hand valve. Observe compound low pressure
gauge shows a slight vacuum.
(6) Continue operating vacuum pump for 25 minutes
after
low pressure gauge indicates 26 to 28
inches of vacuum.
(7) If system cannot maintain 26 to 28 inches of vacuum close both manifold hand valves and
observe compound gauge.
(8) If the compound gauge show loss of vacuum, there is a leak in the system, which must be repaired
before continuing with evacuation.
(9) If no leaks are evident, reopen both manifold hand valves and continue the evacuation for another
30 minutes.
(10) Close manifold hand valves, stop vacuum pump and disconnect center manifold hose from the
vacuum pump.
(11) Immediately charge system. (Refer to Charging System).
PIPER AIRCRAFT
PA-32R-301/301T
MAINTENANCE MANUAL
21-50-00
Page 21-26
Reissued: July 1, 1993
1I9
System Vacuum
Temperature F
27.99
100
COMPOUND GAUGE
28.89
80
READING IN INCHES
29.40
60
OF MERCURY VACUUM
29.71
40
29.82
20
29.88
0
— NOTE —
The compound gauge will read approximately one inch less
pressure for each 1,000 feet above sea level, .
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 ...