Linde T20 AP, Обучение по обслуживанию

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Section 6
Page 29
Service Training
6.2 LIFTING
6.2.1 Operating the initial lift of the truck – 2M1
The motor pump is supplied in po24V by the line contactor 1K2, and in negative by the MOSFET
power transistor mounted inside between the terminals ”: Li “ and ”:- “ .
A free wheel diode that helps free the stored energy by the armature during the FET transistor passing
phases, is connected between the terminals “ :+ “ and “ : Li “ .
The motor start-up then is gradual, which prevents current surges and extends the life of the motor.
Note: Putting the traction in safety stops the hydraulic function.
MOTOR PUMP UNIT
6.2.2 Operating the lowering of the truck initial lift – 2Y2
The lowering function is realised by controlling the valve 2Y2.
The supply po24V is direct after the LAC internal relay, the negative is controlled, when you press
the button 2S6, through a FET transistor in output 1X1 : 25.
The lowering speed fixed by the flow restrictor diameter: in the T20AP/SP-2.2 mm diameter, and in the
T24AP/SP- 2.4 mm diameter.
VALVE 2Y2
Connector 2X9
Terminal Colour Function
1 RD(24) Positive 24V
2 GY(25) Negative supply 2Y2
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