4 - 12
Lever Lock
When the lever lock switch is OFF, the CN 13 terminal 8
(lever lock relay output) is OFF and the lever lock relay
circuit is closed. The electrical power from the fuse box
passes through the servo isolator solenoid to the limit
switch to the lever lock relay and is earthed.
The servo isolator solenoid is energised and the
pressurised oil of the pilot pump flows to the pilot line.
When the lever lock switch is ON, the CPU in the right
panel turns the lever lock relay output on (CN13 terminal
8). This provides an earth path for the lever lock relay,
braking the lever lock circuit and de-energising the servo
isolator solenoid. Pressurised oil from the pilot pump is
cut and the monitor lamp is illuminated.
Section C Electrics
9803/6020
Section C
4 - 12
Issue 1
Engine Control
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