Komatsu H70051 Series Operation & Maintenance Manual page 422

HANDLE HYDRAULIC TYPE QUICK COUPLER
5.
Raise the coupler slowly as the machine travels forward,
keep raising it until coupler tube comes to be connected
with the attachment hook and the attachment is a little lift-
ed off from the ground.
6.
Check that the attachment is horizontal to the left and right
and that each hook is correctly inserted.
7.
Operate the lever from "HOLD" position (B) to "TILT" posi-
tion (e), and make the coupler plunger ready to be insert-
ed.
8.
Put your hand off the quick coupler attachment switch.
The switch returns to NEUTRAL position (N), the quick
coupler release pilot lamp (1) goes out, and the alarm buz-
zer stops sounding.
9.
While pulling the lock (a) of the quick coupler attachment
switch in arrow direction (b), push it down to the coupling
position (C).
Keep the quick coupler attachment switch pressed until the
step 10 is finished.
10. Pull out the coupler plunger and lock the attachment.
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ATTACHMENTS AND OPTIONS
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