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曝光台 注意防骗 网曝天猫店富美金盛家居专营店坑蒙拐骗欺诈消费者 ABAA Validity : S / N 1 - 9999 73-10 00 (DA) Page 4 SEP 02 ENGINE PUMP REMOVAL / INSTALLATION WARNING : OBEY THE SAFETY PRECAUTIONS DESCRIBED IN 28-00-00. 1. REMOVAL OF THE ENGINE PUMP (Figures 401, 401A and 401B) A. Tools and consumable materials - Drain pan 0.5 US Gal (2 liters) - Loctite (TB 09-906) - Blanking plugs 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 : APPLY THE MAINTENANCE PROCEDURE OF THE FUEL SYSTEM — REFER TO 28-00-00. 1) Open main switch-breaker. 2) Set the fuel selector to "CLOSED" position. 3) Drain the fuel system in the fuselage - refer to 12-11-02. 4) Remove the engine cowlings - refer to 71-10-01. 5) Install a drain pan under engine pump (2). 6) Disconnect vent hose (10) from union (7). Discard clamp (9) and blank off. 7) Disconnect pipes (15) and (6) from unions (16) and (5). Blank off. 8) Disconnect cooling pipe (14) from cranking boX (8). Retain clamp (13). 9) Disconnect pressure switch (3). 10) Cut off and discard bolts (11) lockwire. 11) Hold engine pump (2), remove bolts (11) and washers (12), remove cranking box (8) and engine pump (2) and discard seal (1). 12) Make sure cranking box (8) is free of cracks and distortion. 13) Check the pipes for condition and replace them if necessary. 14) If engine pump (2) has to be replaced, perform the following operations : a) Remove pressure switch (3) - refer to 28-40-03. b) Remove unions (5), (7) and (16) and clean the threads. c) Remove grounding wire (4). d) Apply Loctite (TB 09-906) to the thread of unions (5), (7) and (16) - refer to 20-00-08. e) Install unions (5), (7) and (16) on new engine pump (2). ACAA Validity : S / N 1 - 9999 73-10-01Page 401 (DA) SEP 02 f) Install grounding wire (4). g) Install pressure switch (3) - refer to 28-40-03. 2. INSTALLATION OF THE ENGINE PUMP (Figures 401, 401A and 401B) A. Tools and consumable materials Torque wrench 0 - 270 lbf.in (0 - 30 N.m) - Varnish (TB 07-901) - Red paint - Stainless steel lockwire, dia. 0.032 in (0.8 mm) 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 : APPLY THE MAINTENANCE PROCEDURE OF THE FUEL SYSTEM — REFER TO 28-00-00. 1) Install a new seal (1), install engine pump (2) and cranking box (8). Secure them with washers (12) and bolts (11). Torque - refer to 20-00-01. 2) Lockwire bolts (11). 3) Connect pressure switch (3). 中国通航网 www.ga.cn 通航翻译 www.aviation.cn 本文链接地址：TB20 MAINTENANCE MANUAL 73 发动机燃油和控制 TB20飞机维护手册(5) |
