Piper Apache PA-23 Aircraft Airplane Service Repair Manual pdf

This service manual will cover anything you need to know about the Apache. 

AIRPLANE SERVICE MANUAL 
APACHE 
PA-23-150 
PA-23-160 
REVISED: OCT. 5, 1999 

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PIPER APACHE SERVICE MANUAL 
LIST OF TABLES 
Figure No. Subject Grid No. 
II-I. Leading Particulars and Principal Dimensions (PA-23-150)........ 1A20 
II-Ia. Leading Particulars and Principal Dimensions (PA-23-160)........ 1B2 
II-II. Recommended Nut Torques (Inch-Pounds) ......... 1B14 
II-III. Flare Fitting Torques .............. 1B16 
II-IIIa. Recommended Lubricating Oils............... 1C16 
II-IV. Thread Lubricants................... 1C18 
II-V. Maximum Distance Between Supports for Fluid Tubing....... 1C18 
II-VI Conversion Tables .................. 1C21 
II-VII. Decimal/ Millimeter Equivalents of Drill Sizes ......... 1C24 
II-VIII. Hose Clamp Tightening................ ID2 
III-I. Inspection Report ................... 1D13 
IV-I. List of Materials (Thermoplastic Repair) ............. 1Fl 
VI-I. Leading Particulars - Hydraulic Powerpak........... 1G16 
VI-III. Hydraulic System Troubleshooting .......... 1G24 
VI-III. Powerpak Troubleshooting................. 1H7 
VI-IV. Special Tools and Test Equipment............ 1H24 
VIII-I. Engine Troubleshooting ............... 1J12 
IX-I. Fuel System Troubleshooting............. 1L1 
X-I. Vacuum System ................ 2A16 
X-II. Directional Gyro Indicator ................. 2A22 
X-III. Gyro Horizon Indicator ................ 2A23 
X-IV. Rate of Climb Indicator ................ 2A24 
X-V. Altimeter..................... 2B1 
X-VI. Airspeed Tubes and Indicator............. 2B3 
X-VII. Magnetic Compass ................. 2B4 
X-VIII. Manifold Pressure Indicator ............... 2B5 
X-IX. Tachometer ................. 2B6 
X-X. Engine Oil Pressure Gauge................. 2B7 
X-XI. Fuel Pressure Gauge ............... 2B8 
X-XII. Turn and Bank Indicator............... 2B9 
X-XIII. Fuel Quantity Indicators ............... 2B10 
X-XIV. Oil Temperature Indicators................. 2B11 
X-XV. Carburetor Air Temperature Indicator............ 2B12 
X-XVI. Flap Position Indicator ................. 2B13 
XI-I. Electrical System Troubleshooting........... 2D8 
XI-II. Electrical Wire Coding ................. 2D19 
XIII-I. Troubleshooting Analysis Chart, Model 979-B1 ....... 2D19 
XIII-II. Troubleshooting Chart (Heater, 940 Series) ......... 2H24 



PIPER APACHE SERVICE MANUAL 
LIST OF ILLUSTRATIONS 
Figure No. Subject Grid No. 
2-1. Three-View of Apache PA-23-150 / l60, Serial Nos. 23-1 to 23-l870 incl. 
2-2. Three-View of Apache PA-23-160, Serial Nos. 23-1871 and up 
2-3. Station Reference Lines 
2-4. Station Reference Lines. 
2-5. Access and Inspection Provisions 
2-6. Access and Inspection Provisions 
2-6b. Torque Wrench Formula. 
2-7. Jacking Arrangement 
2-8. Weighing 
2-9. Longitudinal Leveling . 
2-10. Lateral Leveling. 
2-11. Service Points . 
2-12. Servicing Landing Gear Oleo Struts. 
2-13. Fuel Screen Bowl. 
2-14. Oil Pressure Screen. 
2- l5. Oil Suction Screen 
2-16. Lubrication Chart 
2-17. Identification of Aircraft Fluid Lines 
2-17. Cherrylock Rivet Removal. 
2-19. Flareless Tube Fittings 
3-1. Fuel Selector Valve Control Cables 
4-1. Door Lock Installation 
4-2. Landing Light Installation, Serial Nos. 23-1 to 23-1163 incl 
4-3. Landing Light Installation, Serial Nos. 23-1164 and up 
4-4. Front Spar Attaching Members 
4-5. Empennage Skin Diagram 
4-6. Fuselage Skin Diagram 
4-7. Wing Skin Diagram . 
4-8. Nacelle Skin Diagram. 
4-9. Surface Scratches Abrasions or Ground in Dirt 
4-10. Deep Scratches Shallow Nicks and Small Holes 
4-11. Mixing of Epoxy Patching Compound 
4-12. Welding Repair Method 
4-13. Repairing of Cracks 
4-14. Various Repairs 
4-15. Repair of Stress Lines 
4-16. Repair of Impacted Damage 
5-l. Aileron Control Installation. 
5-2. Elevator Control Installation . 
5-3. Rudder Control Installation 
5-4. Tail Trim Mechanism Installation 
5-5. Fabricated Aileron Bellcrank Special Tool 
5-6. Aileron Adjustment Points 
5-7. Checking Neutral Position of Rudder 
5-8. Nose Wheel Aligning 
5-9. Installing Elevator Trim Drum Cable Locking Pin .. 1G3 
5-10. Wrapping Elevator Trim Drum Cable ... 1G4 
5-11. Wrapping Rudder Trim Drum Cable... 1G5 
5-12. Wrapped Rudder Trim Drum Cable ... 1G6 
5-13. Installing the Forward Rudder Trim Tab Screw Collar Cotter Pin. 1G8 
5-14. Flap Alignment.... 1G10 
5-15. Adjusting Flap Control Rod End Bearing .. 1G11 
5-16. Correct Method of Installing Rod End Bearings.. 1G13 
6-1. Schematic Diagram, Hydraulic System.. 1G17 
6-2. Flow Diagram Landing Gear Selector Lever UP.. 1G20 
6-3. Flow Diagram Landing Gear Selector Lever DOWN.. 1G21 
6-4. Flow Diagram Wing Flap Selector Lever DOWN.. 1G22 
6-5. Flow Diagram Wing Flap Selector Lever UP .. 1G2 
6-6. Flow Diagram Both Selector Levers Neutral .. 1H4 
6-7. Hydraulic Powerpak, Exploded View... 1H11 
6-7. Hydraulic Powerpak, Exploded View (cont.) .. 1H12 
6-8. Hydraulic System .... 1I1 
7-1. Landing Gear Installation, Serial Nos. 23-1 to 23-1837 incl .. 1I7 
7-2. Landing Gear Installation, Serial Nos. 23-l838 and up .. 1I8 
7-3. Landing Gear Drag Link (Fabricated Type) .. 1I10 
7-4. Landing Gear Drag Link (Forged Type) ... 1I11 
7-5. Oleo Strut, Exploded View of Internal Parts .. 1I12 
7-6. Main Gear Attaching Detail ... 1I14 
7-7. Checking Wheel Alignment ... 1I15 
7-8. Adjusting Landing Gear Limit Switches... 1I19 
7-9. Anti-Retraction Valve.... 1I21 
7-10. Inspection and Replacement of Cleveland Brake Linings.. 1I24 
7-11. Bleeding the Brake .... 1J2 
7-12. Replacing Cleveland Brake Disc When Installed With Rivets. 1J3 
7-13. Cleveland Brake Disc Minimum Thickness.. 1J4 
7-14. Adjusting the Goodrich Brake... 1J5 
8-1. Hartzell Propeller.... 1J20 
8-2. Rear View of Engine Prior to Installation .. 1J21 
8-3. Bottom Right View of Engine ... 1J22 
8-4. Lord Mount, Exploded View... 1J23 
8-5. Installing the Engine ... 1J24 
8-6. Engine Lord Mount Locating Pin Diagram.. 1K1 
8-7. Woodward Propeller Governor Adjustment Points .. 1K7 
8-8. Removing Spark Plug Frozen to Bushing .. 1K11 
9-1. Main Fuel System.... 1K15 
9-2. Auxiliary Fuel System... 1K18 
9-3. Parallel Relation of the Fuel Valve Control and Auxiliary Fuel 
Valve Arm Assemblies in the OFF Position .. 1K23 
9-4. Checking Recommended Clearance Between Valve Arm and 
Valve in theON Position... 1K24 
9-5. Fuel Selector Control Box ... 1L3 
9-6. Fuel Strainer Bowl...... 1L4 
10-1. Instrument Panel....... 2A15 
10-2. Instrument Panel....... 2A18 
10-3. Dual Vacuum System ..... 2A19 
11-1. Generator Wiring System Schematic (Single).. 2B19 
11-2. Generator Wiring System Schematic (Dual) .. 2B20 
11-3. Sectional View of Generator... 2B24 
11-4. Wiring Circuit, Single Regulator....... 2C2 
11-5. Wiring Circuit, Dual Regulators....... 2C2 
11-6. Current-Voltage Regulator... 2C9 
11-7. Use of Riffler File to Clean Contact Points... 2C12 
11-8. Voltage Regulator Air Gap ... 2C12 
11-9. Checking Voltage Setting Fixed Resistance Method..... 2C13 
11-10. Checking Voltage Setting Variable Resistance Method .... 2C13 
11-11. Adjusting Voltage Regulator Setting ..... 2C14 
11-12. Cutout Relay Air Gap Check and Adjustment .. 2C16 
11-13. Cutout Relay Point Opening Check and Adjustment ..... 2C16 
11-14. Checking Cutout Relay Closing Voltage .... 2C17 
11-15. Adjustment of Cutout Relay Closing Voltage .. 2C17 
11-16. Checking Current Regulator, Load Method ... 2C18 
11-17. Checking Current Regulator, Jumper Lead Method...... 2C18 
11-18. Checking and Adjusting Relay Air Gap.... 2C21 
11-19. Checking and Adjusting Relay Point Opening.. 2C21 
11-20. Checking Relay Closiing Voltage....... 2C22 
11-21. Adjusting Relay Closing Voltage ....... 2C22 
11-22. No-Load Test Hookup ..... 2D1 
11-23. Lock-Torque Test Hookup... 2D2 
11-24. Resistance Test Hookup .... 2D2 
11-25. Electrical System Schematic (Basic), Serial Nos. 23-1 to 23-746 incl. .... 2D21 
11-26. Electrical System Schematic (Complete), Serial Nos. 23-1 to 23-746 incl. .. 2D23 
11-27. Electrical System Schematic (Basic), Serial Nos. 23-747 to 23-1688 incl. .. 2E1 
11-28. Electrical System Schematic (Complete), Serial Nos. 23-747 to 23-l683 incl. . 2E3 
11-29. Electrical System Schematic (Basic), Serial Nos. 23-1684 and up ...... 2E5 
11-30. Electrical System Schematic (Complete), Early Models ... 2E7 
11-31. Electrical System Schematic (Complete), Late Models .... 2E9 
13-1. Heating and Ventilating System, Serial Nos. 23-1 to 23-170 incl. ...... 2E17 
13-2. Heating and Ventilating System, Serial Nos. 23-171 to 23-375 incl..... 2E18 
13-3. Heating and Ventilating System, Serial Nos 23-376 to 23-746 incl. ..... 2E19 
13-4. Heating and Ventilating System, Serial Nos. 23-747 to 23-1501 incl. .... 2E20 
13-5. Heating and Ventilating System, Serial Nos. 23-1502 and up .. 2E21 
13-6. South Wind Heater - Model 979-B1...... 2E23 
13-7. Safety Valve ......... 2E24 
13-8. Fuel Control Valve...... 2E24 
13-9. Combustion Air Blower.... 2F2 
13-10. Ventilating Air Fan. ................ 2F2 
13-11. Heater Wiring Diagram - Model 979-B1 ............. 2F3 
13-12. Circuit Analyzer ............... 2F6 
13-13. Circuit Analyzer Electrical Circuit .......... 2F6 
13-14. Heater Test Stand.............. 2F7 
13-15. Test Stand Accessories ................ 2F7 
13-l6. Test Stand Conversion Kit ............ 2F8 
13-17. Circuit Analyzer Installation ............. 2F8 
13-18. Test Stand Installation ................. 2F13 
13-19. Test Stand Electrical Circuit ............... 2F15 
13-20. High Heat Fuel Flow Check ............... 2F18 
13-21. Combustion Air Blower Check ................ 2F20 
13-22. Ventilating Air Blower Check ........... 2F20 
13-23. Exploded Parts View, Model 979-B1 Heater ............. 2F24 
13-24. Service Tools (South Wind)................ 2G7 
13-25. Fuel Control Valve (Cutaway View)............... 2G9 
13-26. Flow System (South Wind Heater)........... 2G10 
13-27. Fuel Safety Valve (Cutaway View)........... 2G11 
13-28. Heater Wiring Diagram - Models 940-B and 940-B12 .......... 2G15 
13-29. Heater Wiring Diagram - Models 940-D, 940-DA, and 940-D12...... 2G16 
13-30. Flame Detector Switch (Cutaway View) ............. 2G23 
13-31. Exploded Parts View, Heater Assembly .............. 2H6 
13-32. Exploded Parts View, Ventilating Air Blower Assembly ...... 2H8 
13-33. Ventilating Air Blower Motor ........... 2H11 
13-34. Combustion Air Blower Motor........... 2H12 
13-35. Detail of Exhaust Extensions Installation............. 2H17 
13-36. Fuel Flow Test Set-Up.................. 2H19 
13-37. Heater Fuel Filter ................... 2H21