Komatsu HD325-8, Operation & Maintenance Manual

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2.
Loosen the lock nut (2) of manual lower valve (1) on the
head side.
3.
Turn the grip (3) of valve (1) counterclockwise.
4.
Loosen the lock nut (5) of manual lower valve (4) on the
bottom side.
5.
Turn the grip (6) of valve (4) counterclockwise.
The oil in the hoist cylinder is discharged into the steering
and hoist oil tank, and the dump body lowers.
6.
When the dump body is lowered to the desired position,
turn the bottom side grip (6) clockwise, and tighten the lock
nut (5).
7.
Turn the head side grip (3) clockwise, and tighten the lock nut (2).
If the dump body cannot be lowered even if the above method is used, consult your Komatsu distributor.
PRECAUTIONS FOR TOWING MACHINE
k k
WARNING
Injury or death could result if a disabled machine is towed
incorrectly or if there is a mistake in the selection of the
wire rope or drawbar.
• Always confirm that the wire rope or drawbar used for
towing has ample strength for the weight of the ma-
chine being towed.
• Never use the wire rope which has cut strands (A), re-
duced diameter (B), or kinks (C). There is a danger that
the rope may break during the towing operation.
• Wear the leather gloves always when handling the wire
ropes.
• Never tow a machine on a slope.
• During the towing operation, never stand between the
towing machine and the towed machine.
• If the machine moves suddenly, a load is applied sud-
denly to the towing wire or drawbar, and the towing
wire or drawbar may break.
Move the machine gradually to a constant speed.
• Be extremely careful if there is a failure in the engine
or brake system: the brakes will not work.
• If the steering and the brakes on the machine being
towed cannot be operated, do not let anyone ride on
the machine being towed.
NOTICE
• Tow the machine only for a short distance, such as to a place for inspection and maintenance.
Do not tow the machine for a long distance.
• The maximum towing capacity for this machine is as follows. Do not tow any load greater than this.
HD325-8: 251760 N {25670 kg}
HD405-8: 274855 N {28030 kg}
• For towing a failed machine, consult your Komatsu distributor.
This machine must not be towed except in emergency. However, if it is unavoidable to tow the machine, pay
attention to the following precautions.
OPERATION TROUBLES AND ACTIONS
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