Coupler Plunger Control System - Komatsu WA250-6 Shop Manual

Wheel loader

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Coupler plunger control system

The coupler plunger is extracted or retracted

by operating the quick coupler attachment

switch to connect and release each attachment

and the coupler.

When quick coupler attachment switch is in

"Release" position

If the quick coupler attachment switch (1) is set

in the "Release" position, quick coupler sole-

noid valve (2) is energized.

If the work equipment (bucket) control lever is

moved to the tilt side, the oil flows into the

head side of coupler plunger (3). Then, coupler

plunger (3) is retracted and the attachment and

coupler are released.

When quick coupler attachment switch is in

"Connect" position

If the quick coupler attachment switch (1) is set

in the "Connect" position, quick coupler sole-

noid valve (2) is de-energized.

If the work equipment (bucket) control lever is

moved to the tilt side, the oil flows into the bot-

tom side of coupler plunger (3). Then, coupler

plunger (3) is extracted and the attachment

and coupler are connected.

920 Electrical system, Part 2

WA250, 250PZ-6

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Wa250pz-6 75001