R **ON A/C ALL
R (Ref. Fig. 006)
R **ON A/C 001-049, 101-105,
R (Ref. Fig. 007)
R **ON A/C ALL
A. Electro-Manual Selector Valve 2500MJ
If the internal solenoid of this valve is energized, this releases its internal pilot valve. Then, the internal main valve opens and the HP fluid can flow through.
B. Manual Selector Valve 2501MJ (2504MJ)
The internal proximity switch of the manual selector valve is part of the door control system. This proximity switch closes the electrical circuit when the selector of this valve is in the "OPEN" or "CLOSE" position. This operation usually starts the electric pump of the yelow hydraulic system.
C. Door Actuators 2502MJ and 2503MJ (2505MJ and 2506MJ)
The internal proximity switches of the door actuators are connected in series. They give a signal to show the operator that the door actuators are fully extended and locked internally.
D. Indicator Light 9MJ (8MJ)
The green indicator light gets a signal from the internal proximity switches of the door actuators. It comes on when the door actuators are fully extended and locked internally. The light goes off as soon as the internal locking mechanism of the door actuator is released.
R Electro-Manual Selector Valve 2500MJ Figure 006
1EFF : 1 1 1CES ALL 1 111 52-35-00 Page 38 Aug 01/05
Limit Switches in Door Sill Area R Figure 007
1EFF : 001-049, 101-105, 1 52-35-00Page 39 1 1 Aug 01/05 1 1 1CES 1 **ON A/C 001-049, 101-105,
E. Limit Switches 2507MJ and 2508MJ (2509MJ)
NOTE : The limit switches 2507MJ and 2508MJ (2509MJ) are only installed
____
with the semi-automatic cargo-loading system.
These series-connected limit switches in the door sill area prevent the hydraulic operation of the cargo door, when:
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the pedal of the door sill latch 2004VU is pushed down. This sets the related YZ-latch to the lower position and operates the limit switch 2507MJ.
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the overridable Y-latch of the door sill latch 2004VU is moved down. The related drawbar then operates the limit switch 2508MJ (2509MJ).
**ON A/C ALL
F. Proximity Switch 5MJ (12MJ)
The proximity switch monitors the condition of the locking mechanism. It prevents the hydraulic operation if the cargo door is still locked.
6. Operation_________
A. Open Mode
When the door locking handle is in the UNLOCKED position this operates the proximity switch 5MJ (12MJ) of the locking mechanism. The door control circuit MJ is closed when the selector on the control panel is in the OPEN position. Then:
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the electro-manual selector valve 2500MJ opens,
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the manual selector valve 2501MJ (2504MJ) moves in the extension mode,
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the electric pump 3075GX starts to pressurize the door hydraulic system.
Then, the duplex door actuators 2502MJ and 2503MJ (2505MJ and 2506MJ) extend until the cargo door is fully opened. The green indicator light 9MJ (8MJ) comes on when the door actuators 2502MJ and 2503MJ (2505MJ and 2506MJ) are in their locked positions.
1EFF : ALL 1 52-35-00Page 40 1 1 Aug 01/05 1 1 1CES 1 **ON A/C 001-049, 101-105,
B. Close Mode When the semi-automatic cargo loading system is installed, examine that:
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the overridable Y-latches of the door sill latches are lifted,
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the manual YZ-latches of the door sill latches are in their top
positions. This makes sure that the limit switches 2507MJ and 2508MJ (2509MJ) are operated. The door control circuit MJ is closed when the selector on the control panel is in the CLOSED position. Then:
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the electro-manual selector valve 2500MJ opens,
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the manual selector valve 2501MJ (2504MJ) moves to the retraction mode,
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the electric pump 3075GX starts to pressurize the door hydraulic system.
Thus, the green indicator light 9MJ (8MJ) goes off as soon as the duplex door actuators 2502MJ and 2503MJ (2505MJ and 2506MJ) retract. This retraction closes the cargo door.
R **ON A/C 051-099, 106-149, 151-199, 201-299, 301-399, 401-499,
B. Close Mode
When the selector on the control panel is in the CLOSED position, this closes the door control circuit MJ. Then:
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the electro-manual selector valve 2500MJ opens,
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the manual selector valve 2501MJ (2504MJ) moves to its closed position,
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the electric pump 3075GX starts to pressurize the door hydraulic system.
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