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EMERGENCY BOOM LOWERING PROCEDURE
(Without hose-rupture safety valve)
WARNING: Prevent personal injury. Confirm that no
one is under the front attachment before starting the
procedure below.
ZX180-3, 200-3, 270-3, 330-3 class
If the engine stalls and cannot be restarted, lower the boom
to lower the bucket to the ground referring to the emer-
gency boom lowering procedure stated below.
1. Loosen lock nut (1). Loosen screw (2) one half of a turn.
The boom will start to lower. The boom lowering speed
can be somewhat adjusted by loosening screw (2) more.
NOTE: Never loosen screw (2) more than 2 turns. Screw (2)
may come off.
2. After the bucket is lowered to the ground, retighten
screw (2), then lock nut (1) to the specifications below.
Lock Nut (1)
Tool
: 13 mm
Torque
: 13 N•m (1.3 kgf•m, 9.4 lbf•ft)
Screw (2)
Tool
: 4 mm (Hexagonal wrench)
Torque
: 7 N•m (0.7 kgf•m, 5.0 lbf•ft)
NOTE: Excessive leakage may result if the screw and the lock
nut are tightened insufficiently. Be sure to retighten the
screw and the lock nut to specifications.
OPERATING THE MACHINE
5-34
2
1
Front-attachment
Side
T1V1-03-03-073
Emergency valve
1
2
T1V1-03-03-038
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