WARNING
When pins are knocked in with a hammer, pieces of metal may fly and cause serious injury.
When carrying out this operation, always wear goggles, hard hat, gloves, and other protective equipment.
When the bucket is removed, place it in a stable condition.
If pins are hit with a strong force, there is a hazard that the pin may fly out and injure people in the surrounding area. Make sure that there is no one in the surrounding area before starting the operation.
When removing the pins, do not stand behind the bucket. In addition, be extremely careful not to put your foot under the bucket while standing at the side for the work.
When removing or inserting pins, be extremely careful not to get your fingers caught.
Never insert your fingers into the pin holes when aligning the holes.
Stop the machine on a firm and flat surface and do the work. When performing joint work, appoint a lead and follow that person's instructions and signals.
Replacement
1. Place the bucket in contact with a flat surface.
REMARK
When removing the pins, place the bucket so that it is in light contact with the ground.
If the bucket is lowered strongly to the ground, the resistance will be increased and it will be difficult to remove the pins.
NOTICE
After removing the pins, make sure that mud or sand does not get on them.
Dust seals are fitted at both ends of the bushings, be careful not to damage them.
2. Remove the double nut on the stopper bolt for arm pin (A) and link pin (B), remove the bolt, pull out arm pin (A) and link pin (B), and then remove the bucket.
3. Align the arm (5) with holes (1) of the replacement bucket and the link (6) with holes (2), then insert grease-coated pins (A) and (B) into hole (1) and hole (2) respectively.
OPERATION
MACHINE OPERATIONS AND CONTROLS
OPERATION
MACHINE OPERATIONS AND CONTROLS
REMARK
When installing the bucket, for arm pin portion (A), fit O-ring (3) to bucket (4) in the position shown in the diagram on the right. After inserting the pin, fit it in the standard groove.
For link pin portion (B), install the bucket with O-ring (3) fitted in the standard groove.
4. Install the stopper bolts and nuts for each pin, then grease the pin.
REMARK
Lubricate with grease thoroughly until the grease comes out from the end face.
When replacing the bucket, replace the dust seal if it has been damaged. If a damaged seal is used without being replaced, sand and dirt may enter the pin portion and cause abnormal wear of the pin.
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Inversion
NOTICE
The rock bucket (PC300: if equipped, PC350: standard) interferes with the arm, so it cannot be turned and used for shovel operations.
1. Place the bucket in contact with a flat surface.
REMARK
When removing the pins, place the bucket so that it is in light contact with the ground.
If the bucket is lowered strongly to the ground, the resistance will be increased and it will be difficult to remove the pins.
NOTICE
After removing the pins, make sure that mud or sand does not get on them.
Dust seals are fitted at both ends of the bushings, be careful not to damage them.
2. Remove the double nut on the stopper bolt for arm pin (A) and link pin (B), remove the bolt, pull out arm pin (A) and link pin (B), and then remove the bucket.
3. After removing the bucket, reverse it.
4. Align arm (5) with replacement bucket hole (1), then align link (6) with hole (2), coat pins (A) and (B) with grease, and install.
OPERATION
MACHINE OPERATIONS AND CONTROLS
OPERATION
MACHINE OPERATIONS AND CONTROLS
REMARK
When reversing, do not install an O-ring. Keep the O-ring in a safe place until using it next.
5. Install the stopper bolts and nuts for each pin, then grease the pin.
REMARK
Lubricate with grease thoroughly until the grease comes out from the end face.
When replacing the bucket, replace the dust seal if it has been damaged. If a damaged seal is used without being replaced, sand and dirt may enter the pin portion and cause abnormal wear of the pin.
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PARKING MACHINE
WARNING
Avoid stopping suddenly. Give yourself ample room when stopping.
When stopping the machine, select flat hard ground and avoid dangerous places.
If it is unavoidably necessary to park the machine on a slope, insert blocks underneath the track shoes. As an additional safety measure, thrust the bucket into the ground.
If the control lever is touched by accident, the machine may move suddenly, and this may lead to a serious accident.
Before leaving the operator's compartment, always set the lock lever securely to LOCK position.
1. Put left and right travel levers (1) in the neutral position.
The machine stops.
2. Turn fuel control dial (2) to low idling position (MIN) and lower the engine speed.
OPERATION
MACHINE OPERATIONS AND CONTROLS
OPERATION
MACHINE OPERATIONS AND CONTROLS
3. Lower the bucket horizontally until the bottom touches the ground.
4. Set lock lever (3) in the LOCK position (L).
5. Check the engine cooling water temperature and engine oil pressure with the machine monitor.
If the coolant temperature gauge is in the red range, allow it to cool until the indicator enters the black range, then stop the engine. For details of the inspection and action to take, see "TROUBLES AND ACTIONS (PAGE 3-154)".
If the engine oil pressure monitor lights up, stop the engine immediately. For details of the inspection and action to take, see "TROUBLES AND ACTIONS (PAGE 3-154)".
6. Stop the engine. For details on the procedure for stopping the engine, see "STOPPING THE ENGINE (PAGE 3-107)".