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NOTE : The AIRBORNE vacuum pump removal / installation procedure is similar to that of the SIGMATEK, CHAMPION or AERO ACCESSORIES pump, except as regards the filter. C. Removal of the SIGMATEK, CHAMPION or AERO ACCESSORIES vacuum pump 1) Remove engine cowlings - refer to 71-10-01. 2) Remove clamps (4) and (7) and disconnect hoses (3) and (8). Blank off. 3) Remove nuts (12), lockwashers (11) and washers (10). Discard lockwashers (11). 4) Remove and blank off vacuum pump (13). 5) Discard seal (9). 6) If necessary, remove 90° elbow (5) and elbow (6). Blank off. 7) Carefully clean 90° elbow (5) and elbow (6). 8) If necessary, remove filter (14). a) Remove clamps (1) and (2) and disconnect hoses (3) and (15). Blank off. b) Remove and discard nuts (18), remove washers (19) and bolts (23). c) Remove filter (14) and clamp (16). 2. INSTALLATION OF THE VACUUM PUMP (Figure 401) A. Tools and consumable materials - Lubricant (TB 06-903C) B. Installation of the SIGMATEK, CHAMPION or AERO ACCESSORIES vacuum pump 1) If 90° elbow (5) and elbow (6) have been removed, perform the following operations : a) Spray the threads of 90° elbow (5) and elbow (6) with lubricant (TB 06-903C). b) Install and hand-tighten 90° elbow (5) and elbow (6) on vacuum pump (13). c) Direct elbow (6) to the right and 90° elbow (5) to the left by screwing from 1/2turn minimum to 1.5 turn maximum with a wrench. 2) Install new seal (9) and vacuum pump (13). Secure with washers (10), new lockwashers (11) and nuts (12). 3) Torque according to "Specific cases" tightening procedure - refer to 20-00-01. 4) Connect hose (3) to 90° elbow (5) and secure with clamp (4). 1 - Clamp 2 - Clamp 3 - Hose 4 - Clamp 5 - 90° elbow 6 - Elbow 7 - Clamp 8 - Hose 9 - Seal 10 - Washer 11 - Lockwasher 12 - Nut 13 - Vacuum pump 14 - Filter 15 - Hose 16 - Clamp 17 - Protection sleeve 18 - Nut 19 - Washer 20 - Engine mount 21 - Clamp 22 - Adhesive protection tape 23 - Bolt Vacuum pump - Removal / Installation Key to Figure 401 12 11 Vacuum pump - Removal / Installation Figure 401 5) Connect hose (8) to elbow (6) and secure with clamp (7). 6) If removed, install filter (14). a) Inspect adhesive protection tape (22) on engine mount (20) and protection sleeve (17) of clamp (16) for correct condition, replace if necessary. b) Install clamp (16) on filter (14) and secure with bolt (23), washer (19) and new nut (18). CAUTION : THE FILTER MUST BE INSTALLED WITH THE ARROW POINTING TOWARDS THE VACUUM PUMP. c) Install clamp (21) on engine mount (20) over adhesive protection tape (22). 中国通航网 www.ga.cn 通航翻译 www.aviation.cn 本文链接地址：TB20 MAINTENANCE MANUAL 37 真空 TB20飞机维护手册(8) |
