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GROUP 12 PROLIX SWITCH (Up To # 0062) : 1. Operating Principle Wiring Diagram

This document provides information about a Group 12 Prolix Switch that can manually control an excavator's electronic control system when the normal system is out of order. The switch has a normal and emergency position. In normal operation, the CPU controller regulates hydraulic pump delivery. In emergency mode, a constant current fixes the EPPR valve position, allowing equivalent performance to standard mode until repairs are completed.

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Saidi Jalel
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663 views1 page

GROUP 12 PROLIX SWITCH (Up To # 0062) : 1. Operating Principle Wiring Diagram

This document provides information about a Group 12 Prolix Switch that can manually control an excavator's electronic control system when the normal system is out of order. The switch has a normal and emergency position. In normal operation, the CPU controller regulates hydraulic pump delivery. In emergency mode, a constant current fixes the EPPR valve position, allowing equivalent performance to standard mode until repairs are completed.

Uploaded by

Saidi Jalel
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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GROUP 12 PROLIX SWITCH (up to # 0062)

Is the conversion switch to manual control temporarily when the electronic control system is out of
order, until repair work be done.

EMERGENCY

Electric box
NORMAL

Never place this switch in EMERGENCY


position when the CPU is in normal operation.

1. OPERATING PRINCIPLE WIRING DIAGRAM


CN-75 Normal :
2
1
EPPR V/V CN-47 Emergency :
2
1
RESISTOR
CS-7
6 6
4 5
5
5 4
6

4
1
3 3 2
2
2 1
3
T

1
PROLIX SW
CN-51

CN-50

32 8 24 28 36

CPU CONTROLLER

1) NORMAL POSITION
・EPPR valve supply specified amount of pilot pressure to the flow regulator of hydraulic pump and
regulate hydraulic pump delivery amount depending upon the signal of CPU controller by selected
mode.
2) EMERGENCY POSITION
・If prolix switch is set at the emergency position when any abnormality occurs in NEW CAPO
system, constant electric current from battery flows to EPPR valve so that EPPR valve can be
fixed at the predetermined position.
・In this case excavator can be operated at an equivalent performance to S mode.

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