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TB20 MAINTENANCE MANUAL 80 起动 TB20飞机维护手册(4)

时间:2011-11-15 10:26来源:蓝天飞行翻译 作者:航空
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A. Magneto selector
The magneto selector is located on the lower part of the L.H. instrument panel. It applies the contact of the magnetos and controls the starter relay.
B. Starter The starter is secured to the L.H. front lower part of the engine. It drives the engine through the ring gear.
The gearing of the driving gear and the ring gear is ensured by the helical groove of the starter shaft. After starting, the driving gear comes back to its initial position by means of a return spring.
C. Starter relay
The starter relay is secured to the firewall and is accessible through the engine upper cowling. It ensures the electrical continuity, necessary for starter operation, between the starter and the battery or the ground power unit.
The starter relay is electrically supplied by "BUS 2" bar and protected by a fuse located on PL3 panel.
ACAB
Validity : With front battery 80-00-00Page 1
(DA) SEP 02
 
D. Starting indicator light (option)
The starting indicator light is located on the advisory panel. During engine starting, its illumination indicates to the pilot that the starter is energized.
4. OPERATION
When set to "START PUSH" position, the magneto selector controls the starter relay. Electrical power supply is applied to the starter via the relay.
 
    
    
148 0000 OA AA HW Z4100 
    013NOVIN

Starting - Electrical schematic
Figure 1
ACAB
Validity : With front battery 80 00-00Page 3
(DA) SEP 02
 

  A - Starter
B - Starter relay
 
STARTER
REMOVAL / INSTALLATION
I CAUTION : WHEN REPLACING A "PRESTOLITE" OR "ELECTROSYSTEMS MHB - 4016" STARTER WITH AN "ELECTROSYSTEMS MHB - 6016" STARTER, UPDATE WEIGHING REPORT.
1. REMOVAL OF STARTER (Figures 401 and 402)
A. Tools and consumable materials
None
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) Remove the engine cowlings - refer to 71-10-01. With vapor cycle cooling
2) Remove L40 compressor - refer to 21-55-01. All
3) Cut off and discard tie-wrap (20).
I 4) Disconnect power supply cable (4), retain nut (2) and discard lockwasher (1).
5) Cut off and discard the lockwire, remove bolt (13) and washer (12).
6) Remove bolt (9), washer (7) and lockwasher (8). Discard lockwasher (8).
 
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