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| Illustration 1 | g06353602 |
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(1) Solenoid valve
(2) Main control valve | |
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| Illustration 2 | g06353604 |
| (3) Hydraulic lockout lever (LOCKED position) | |
When hydraulic lockout lever (3) is in the LOCKED position, solenoid valve (1) does not receive a signal from the ECM. The hydraulic system will not be activated.
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| Illustration 3 | g06353607 |
| (3) Hydraulic lockout lever (UNLOCKED position) | |
When hydraulic lockout lever (3) is in the UNLOCKED position, solenoid valve (1) receives a signal from the ECM. The hydraulic system will be active.
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| Illustration 4 | g06353612 |
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Section view of left console (3) Hydraulic lockout lever (4) Magnet (5) Sensor | |
The lockout switch consists of magnet (4) and sensor (5). Magnet (4) is mounted on a bracket with hydraulic lockout lever (3).
When hydraulic lockout lever (3) is moved to the LOCKED position, solenoid valve (1) on main control valve (2) is not energized. Pilot oil is not supplied to the pilot control solenoids. When the joysticks and/or the travel levers/pedals are operated, the cylinders or the motors are not activated.
The engine will not start unless hydraulic lockout lever (3) is in the LOCKED position. If someone unexpectedly operates the machine, the machine will not operate.
When hydraulic lockout lever (3) is placed in the UNLOCKED position, magnet (4) is sensed by sensor (5). The ECM then sends a signal to energize solenoid valve (1) and pilot oil passes through the solenoid valve. Pilot oil now flows to the pilot control solenoids.
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| Illustration 5 | g06353757 |
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Hydraulic activation control valve (partial hydraulic schematic) (1) Solenoid valve (6) Spool (7) Passage (8) Spring (9) Passage | |
When hydraulic lockout lever (3) is placed in the UNLOCKED position, solenoid valve (1) is energized. This action moves spool (6) downwards against the force of spring (8) and allows passage (7) to open. Pilot pressure oil flows from passage (5) through passage (7) to the pilot control solenoids.
Lockout switch sensor (5) is turned ON by moving lever (3) down into the UNLOCKED position.
When hydraulic lockout lever (3) is in the LOCKED position, solenoid valve (1) is de-energized. Spool (6) returns from the force of spring (8). Passage (7) opens. Oil in passage (7) drains to tank. Pilot oil supply from passage (9) is stopped. Pilot oil supply to the pilot control solenoids is blocked. The cylinders and the motors cannot be activated.
With the hydraulic activation control lever (3) in the LOCKED position, lockout switch sensor (5) will turn OFF because magnet (4) has moved away from sensor (5).
The engine start switch can only be operated when lockout switch sensor (5) is in the OFF position and hydraulic lockout lever (3) is in the LOCKED position.