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Operation—Operating the Machine
KR46761,000115D -19-05APR16-1/1
Lower Boom With Engine Stopped
When an engine stops during operation, the boom cannot
be lowered using the pilot controller because there is no
pilot pressure oil to move the boom valve spool.
CAUTION: Prevent possible injury from
unexpected machine movement. Clear all
bystanders from the area before lowering the
boom with the engine stopped.
1. Remove control valve access cover.
CAUTION: To avoid injury from escaping oil
under pressure, stop engine and relieve the
pressure in the system before disconnecting or
connecting hydraulic or other lines. Tighten all
connections before applying pressure.
IMPORTANT: Avoid machine damage. Never loosen
the boom manual lower screw (2) more than
4 turns, as screw may come off.
2. Loosen nut (1). Loosen boom manual lower screw
(2) 1/2 turn. The boom will start to lower. The boom
lowering speed can be adjusted by loosening screw
more.
3. After the attachment is lowered to the ground, tighten
screw, and then nut to specication.
Specication
Screw—Torque................................................................................7 N·m
62 lb·in
Nut—Torque..................................................................................13 N·m
115 lb·in
1— Nut
2— Boom Manual Lower Screw
X9811 —UN—23AUG88
Avoid Injury From Escaping Oil Under Pressure
TX1000642 —UN—29NOV05
Control Valve—Right Side Shown
2-3-22
112321
PN=173
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