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3 - Pressure switch
4 - Reservoir
5 - High pressure valve
6 - Check valve
7 - Shuttle valve
8 - Spool valve
9 - Pump
10 - Low pressure valve
11 - Air intake
12 - Filter
13 - Motor shaft
14 - L.H. main gear actuator
15 - Emergency valve control
16 - Configuration and control panel
17 - Emergency valve
Extension and retraction - Landing gear system in "extended and locked" position
Key to Figure 5
I ABAB
Validity : Electrohydraulic generator "L.H.C." 32-30-00Page 12
(BA) JUN 02
Extension and retraction - Landing gear system in "extended and locked" position
Figure 5
1 - Nose gear actuator
2 - R.H. main gear actuator
3 - Pressure switch
4 - Reservoir
5 - High pressure valve
6 - Check valve
7 - Shuttle valve
8 - Spool valve
9 - Pump
10 - Low pressure valve
11 - Air intake
12 - Filter
13 - Motor shaft
14 - L.H. main gear actuator
15 - Emergency valve control
16 - Configuration and control panel
17 - Emergency valve
Extension and retraction - Landing gear system "emergency extension"
Key to Figure 6
PAGE INTENTIONALLY LEFT BLANK
EXTENSION AND RETRACTION
DESCRIPTION AND OPERATION
1. GENERAL
The landing gear maneuver system includes the following elements :
- main landing gear actuating cylinder,
- nose landing gear actuating cylinder,
- main landing gear hinged strut,
- nose landing gear hinged strut,
- main landing gear compensating spring,
- nose landing gear compensating actuator,
- end of travel microswitch.
2. LOCATION
COMPONENT QTY AREA ACCESS DOOR REFERENCE
Main L / G actuating cylinder 2 730 - 740 / 32-30-01
Nose L / G actuating cylinder 1 100 131 32-30-02
Main L / G hinged strut 2 730 - 740 / 32-30-03
Nose L / G hinged strut 1 100 131 32-30-04
Main L / G compensating spring 2 730 - 740 / 32-30-00
Nose L / G compensating actuator 2 100 131 32-30-06
End of travel microswitch 8 100 - 730
- 740 131 32-30-07
3. DESCRIPTION (Figure 1)
A. Main and nose L / G actuating cylinders
Three double-acting actuators allow the landing gear retraction and extension thanks to the hydraulic pressure provided by an electrohydraulic generator. They are attached to the cell at body side, and to the hinged strut at slide rod.
Post-MOD. 141
In order to avoid the transient illumination / extinction of the green indicator lights, a flow regulator is installed on the "retracted" port of the nose landing gear actuating cylinder.
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本文链接地址：TB20 MAINTENANCE MANUAL 32 起落架 TB20飞机维护手册(45)
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