2. Start the engine and operate at a medium RPM with the suction gauge indicating 5.0 with central air
filter. If adjustment is necessary, refer to Adjustment of Vacuum Regulator Valve.
3. With the suction gauge reading within the stated range, the gauge attached to the turn and bank should
indicate 2.0 inches of mercury. If adjustment is necessary, turning the adjustment screw, found in the valve
assembly at the back of the instrument, clockwise will decrease the suction and counterclockwise will increase
the suction. After the proper reading is acquired, shut down the engine, remove the gauge, hose and fitting
from the turn and bank and install the plug.
REMOVAL AND REPLACEMENT OF REGULATOR VALVE.
1. To remove the regulator valve, disconnect the three lines and remove the mounting nut. Remove the
valve from the airplane.
2. Replace regulator in reverse order given for removal. Check complete vacuum system for proper
operation.
INDICATING.
VACUUM GAUGE.
The suction gauge is mounted in the right side of the instrument panel. This gauge is calibrated in inches
of mercury and indicates the amount of vacuum created by the engine driven vacuum pump. The suction gauge
has a direct pressure line and a vent line. Therefore, these aircraft indicate the differential pressure or actual
pressure being applied to the gyro instruments. As the system filter becomes clogged or lines obstructed, the
gauge will show a decrease in pressure. Do not reset the regulator until the filter and lines have been checked.
REMOVAL OF VACUUM SENSOR.
Access to the sensor unit is gained by reaching up under the instrument panel to the vacuum regulator.
Removal is accomplished by the following:
1. Disconnect the two electrical leads.
2. Unscrew the sensor unit from the vacuum regulator.
3. Cover hole to prevent foreign matter from entering regulator.
INSTALLATION OF VACUUM SENSOR.
1. Screw sensor unit into vacuum regulator.
2. Reconnect the two electrical leads.
3. Perform operational check.
—END—
37-20-03
Page 37-07
December 1, 1978
2I1
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
Summary of Contents for Arrow IV
Page 18: ...CHAPTER AIRWORTHINESS LIMITATIONS 1A18...
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Page 22: ...CHAPTER TIME LIMITS MAINT CHECKS 1A22...
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Page 40: ...CHAPTER DIMENSIONS AND AREAS 1B16...
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Page 53: ...CHAPTER LIFTING AND SHORING 1C5...
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Page 57: ...CHAPTER LEVELING AND WEIGHING 1C9...
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Page 62: ...CHAPTER TOWING AND TAXIING 1C14...
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Page 66: ...CHAPTER PARKING AND MOORING 1C18...
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Page 70: ...CHAPTER REQUIRED PLACARDS 1C22...
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Page 77: ...CHAPTER SERVICING 1D5...
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Page 110: ...CHAPTER STANDARD PRACTICES AIRFRAME 1E14...
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Page 117: ...CHAPTER ENVIRONMENTAL SYSTEM 1E21...
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Page 169: ...CHAPTER AUTO FLIGHT 1H1...
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Page 176: ...CHAPTER COMMUNICATIONS 1H8...
Page 185: ...CHAPTER ELECTRICAL POWER 1H17...
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Page 233: ...CHAPTER FLIGHT CONTROLS 1J17...
Page 297: ...CHAPTER FUEL 2A18...
Page 320: ...CHAPTER HYDRAULIC POWER 2B17...
Page 355: ...CHAPTER LANDING GEAR 2D4...
Page 418: ...CHAPTER LIGHTS 2F19...
Page 430: ...CHAPTER NAVIGATION AND PITOT STATIC 2G7...
Page 444: ...CHAPTER OXYGEN SYSTEM 2G21...
Page 464: ...CHAPTER VACUUM SYSTEM 2H17...
Page 473: ...CHAPTER ELECTRICAL ELECTRONIC PANELS AND MULTI PURPOSE PARTS 2I2...
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Page 477: ...CHAPTER STRUCTURES 2I6...
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Page 496: ...CHAPTER DOORS 2J1...
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Page 505: ...CHAPTER STABILIZERS 2J10...
Page 514: ...CHAPTER WINDOWS 2J19...
Page 519: ...CHAPTER WINGS 2J24...
Page 550: ...CHAPTER PROPELLER 3A18...
Page 565: ...CHAPTER STANDARD PRACTICES ENGINE 3B9...
Page 568: ...CHAPTER POWER PLANT 3B12...
Page 592: ...CHAPTER ENGINE FUEL AND CONTROL 3C12...
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Page 611: ...CHAPTER IGNITION 3D7...
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Page 655: ...CHAPTER ENGINE INDICATING 3F16...
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Page 664: ...CHAPTER EXHAUST 3G1...
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Page 669: ...CHAPTER OIL SYSTEM 3G6...
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Page 673: ...CHAPTER STARTING 3G10...
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Page 688: ...CHAPTER TURBINES 3H1...
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Page 694: ...CHAPTER 91 CHARTS AND WIRING DIAGRAMS 3H7...
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