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MACHINE OPERATION
Unloading the Machine
NOTICE!
• Select a location that is firm and level and a safe
distance from any road or structure.
• Make sure the trailer is properly chocked to
prevent any movement.
• Use extreme care when the machine drives over
the joint area between the trailer and the ramps.
• Avoid damage caused by unexpected movement
of the work equipment.
• Maintain an angle of 90° to 110° between the
boom and arm.
• Unloading the machine with the arm retracted
may cause damage to the machine.
• Use a signalman to observe and alert the
operator of any potential hazards.
1. Always load/unload the machine on firm, level
ground and keep the machine a safe distance away
from roads.
2. Park the trailer properly and place chocks behind the
trailer wheels. Place the ramps between the trailer
and the machine. Adjust the distance between ramps
to match the distance between the tracks.
3. Make sure the loading ramps have adequate width,
length, thickness, and strength. The maximum angle
of the ramps is 15°.
4. Remove the chains or wire ropes that secure the
machine.
5. Start the engine.
6. Turn the hydraulic lockout control lever to the unlock
(open) position.
Figure 4-86
7. Raise the work equipment and retract the arm toward
the boom. Drive the machine slowly.
8. Stop the machine when it travels over the rear
wheels of the trailer and toward the ramps.
9. Adjust the boom-arm angle between 90° and 110°
and lower the bucket so that the flat surface is in
contact with the ground.
10. Drive the machine slowly onto the ramps.
11. Operate the boom and the arm slowly when the
machine is on the ramps. Allow the machine to
descend slowly until it comes in contact with the
ground.
12. Park the machine at the desired location.
13. Run the engine at low idle for 5 minutes to let it cool
down.
14. Shut off the engine.
15. Turn the key to the ON position and operate all
joysticks and lever to relieve the hydraulic system
pressure.
16. Move the hydraulic lockout control lever to the locked
(closed) position.
17. Turn the key to the OFF position and remove it from
the switch.
18. Turn the battery disconnect switch to OFF. See
"Battery Disconnect Switch" on page 3-15.
0000731
4-40
SY155U Excavator OMM
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