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2. INSTALLATION OF THE ALTERNATOR (Figure 401) A. Tools and consumable materials - Torque wrench 0 to 550 lbf.in (0 to 60 N.m) - Varnish (TB 07-901) - Stainless steel lockwire dia. 0.032 in (0.8 mm) - Red paint B. Procedure WARNING : PRIOR TO ANY OPERATION, ENSURE THAT THE ENGINE, EXHAUST PIPE AND MANIFOLDS ARE COLD. IF NOT, TAKE NECESSARY PRECAUTIONS TO AVOID SEVERE BURNS. WARNING : PRIOR TO ANY OPERATION, ENSURE THAT THE KEY IS REMOVED FROM MAGNETO SELECTOR AND THAT "MAIN SWITCH" IS OFF. IF AIRCRAFT IS EQUIPPED WITH DISCONNECT PLUG ON FIREWALL, DISCONNECT "MAGNETO DISCONNECT" PLUG AND CONNECT IT TO "GROUND MAGNETO FOR SERVICING" PLUG. 1) If removed, install the pulley and the fan - refer to Paragraph 4. 2) Check and, if necessary, replace belt (10) and the boots protecting electrical attachments. 3) Position alternator (9), install bolt (3) and washer(s) (4) (if installed) as marked during removal. 4) Install washer (5) and nut (6) ; do not tighten. 5) Pivot alternator (9) upwards and position belt (10) on pulleys (8) and (1). 6) Secure alternator (9) onto support (13) with bolt (11) and washer (12). 7) Torque bolt (11) and nut (6) - refer to 20-00-01. 8) Lockwire bolt (11). 9) Lock nut (6) with a new cotter pin (7). CAUTION : WHEN CONNECTING THE ELECTRICAL WIRINGS, MAKE SURE THEY ARE CORRECTLY DIRECTED TO AVOID TIGHT BENDS AT THE LEVEL OF THE LUGS. 10) Connect alternator (9) and noise filter (2) wires, apply varnish (TB 07-901) on electrical connections. 11) Adjust the tension of belt (10) - refer to Page 501. 12) Mark the nut of pulley (1) with a line of red paint. 13) Make sure all the tools and materials are removed and the work area is clean and free from debris. 14) Install the engine cowlings - refer to 71-10-01. 15) Perform a test run-up - refer to 05-30-02 and check the alternator for correct operation. 3. DISASSEMBLY OF THE PULLEY (Figure 402) A. Tools and consumable materials None B. Procedure 1) Remove alternator (5) - refer to Paragraph 1. 2) Immobilize pulley (3). 3) Remove nut (2) and lockwasher (1). Discard lockwasher (1). 4) Remove pulley (3), plate (7), fan (6), spacer (4) and woodruff key (8). 4. ASSEMBLY OF THE PULLEY (Figure 402) A. Tools and consumable materials - Torque wrench 0 to 550 Ibf.in (0 to 60 N.m) B. Procedure 1) Inspect for cracks on fan (6), plate (7) and pulley (3). 2) Position spacer (4) on alternator (5) shaft. CAUTION : MAKE SURE FAN (6) IS CORRECTLY POSITIONED. 3) Position fan (6) on alternator (5) shaft, the blades directed towards the alternator. 4) Install plate (7). 中国通航网 www.ga.cn 通航翻译 www.aviation.cn 本文链接地址：TB20 MAINTENANCE MANUAL 24 COMMUNICATIONS TB20飞机维护手册 电源(29) |
