TB20 MAINTENANCE MANUAL 32 起落架 TB20飞机维护手册(72)_通航信息_通航_通用航空

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7) Check landing gear control linkage and indicating system - refer to 32-30-00.
8) Make sure that there is no leak or seepage.
9) Mark nut position with red paint line.
10) Make sure all the tools and materials are removed and the work area is clean and free from debris.
11) Install the cowlings and / or inspection doors.
12) Lower the aircraft to ground and remove the jacks - refer to 07-10-00.
2. ADJUSTMENT / TEST - LANDING GEAR HYDRAULIC SYSTEM PIPES AND HOSES
A. Tools and consumable materials
- Hydraulic test bench 0 - 3627 psi (0 - 250 bars)
B. Procedure
1) Connect pipe (hose) to the hydraulic test bench.
2) Apply pressure of 2466 psi (+ 435 ; - 0) [170 bars (+ 30 ; - 0)].
3) Inspect for leaks and distortion.
4) Drop pressure.
5) Remove pipe (hose).
AAAA
Validity : S / N 1 - 9999 32 30 09Page 204
(BA) JUN 01

HYDRAULIC GENERATION
DESCRIPTION AND OPERATION
1. GENERAL
The hydraulic generation provides the pressurized hydraulic fluid which is required for the supply of the landing gear elements, used during the extension and retraction of the landing gear.
The main elements of the hydraulic generation are :
- the electrohydraulic generator,
- the distribution plate,
- the NORMAL / EMERGENCY valve.
2. LOCATION (Figure 1)
COMPONENT QTY AREA ACCESS DOOR REFERENCE
Electrohydraulic generator 1 230 218 / 238 32-35-01
Distribution plate 1 230 218 32-35-01
Landing gear emergency valve 1 250 / 32-35-02
Landing gear emergency control 1 250 / 32-35-03

3. DESCRIPTION
A. Electrohydraulic generator
The electrohydraulic generator consists of an electric motor with a double way of rotation, which drives a gear pump. The reservoir is integrated to the generator. The pressures are regulated by two pressure relief valves. The control is provided by a lever on the configuration and control box, located on the L.H. strip. The electrohydraulic generator is attached to the L.H. side of frame C3 under the rear bench seatpan.
A circuit-breaker protects the pump system. It is supplied by the BUS 3 of the aircraft and is located on the L.H. circuit-breaker panel.
Opt. or Std Post-MOD. 151 (28 Volts)
A testable amber indicator light, located on M6 advisory panel, indicates to the pilot, via a relay, the operation of the electrohydraulic generator.
This relay, of the ILS type, is secured to frame C3, on the right of the landing gear relay support.
B. Distribution plate
The distribution plate is located under the electrohydraulic generator. It consists of a body equipped with a shuttle valve and a return spring.
AAAA
Validity : Electrohydraulic generator
　
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TB20 MAINTENANCE MANUAL 32 起落架 TB20飞机维护手册(72)