Komatsu PC490-11, Инструкция по установке и эксплуатации

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4) After approximately 5 minutes, stop the engine. Then, start the engine as usual.
PHENOMENA THAT ARE NOT FAILURES
Note that the following phenomena are not failures:
• When the arm is operated IN from a high position for dig-
ging under no load, the arm speed drops momentarily at
the vertical position.
• When performing bucket CURL operation from a high posi-
tion for digging under no load, the bucket speed drops mo-
mentarily at the horizontal position.
• The bucket or arm wobbles by itself during heavy-duty dig-
ging operations.
• When starting or stopping the swing, a noise is generated from the brake valve.
• When going down a steep slope at low speed, a noise is generated from the travel motor brake valve.
PRECAUTIONS FOR TOWING MACHINE
k k
WARNING
Always use the correct towing equipment and towing
method. Any mistake in the selection of the wire rope or
drawbar or the method of towing a disabled machine and
being towed may lead to serious personal injury or death.
• Always confirm that the wire rope or drawbar used for
towing has ample strength for the weight of the ma-
chine being towed.
• A wire rope having cut strands (A), reduced diameter
(B), or kinks (C) may break. Never use such a wire
rope.
• Always wear leather gloves when handling the wire
rope.
• Never tow a machine on a slope.
• During the towing operation, never stand between the
towing machine and the machine being towed.
• Operate the machine slowly and be careful not to ap-
ply any sudden load to the wire rope.
• Do not use the holes for towing light objects or tie-
down holes when towing the machine.
TROUBLES AND ACTIONS OPERATION
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