SANY SY155U, Operation And Maintenance Manual

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4-38
MACHINE OPERATION
SY155U Excavator OMM
• Adjust the throttle control dial to MIN (low idle).
Operating the engine at high speed could result in
sudden, unexpected movement.
• Position the trailer and machine on a solid, level
ground and keep the machine a safe distance away
from roads during loading and unloading operations.
• Make sure the loading ramps have adequate width,
length, thickness, and strength. The maximum angle
of the ramps is 15°.
• Never change direction on the access ramp. If
repositioning the machine is necessary, back up,
re-orient the machine, and drive up or down the
ramps.
• Use care when driving over the joints between the
trailer and the ramps.
• Swinging the upper structure may cause the
machine to tip over and result in personal injury.
Retract and lower the arm and swing the upper
structure slowly to achieve the optimal balance.
• Never operate any control levers other than the
travel levers when the machine is on a ramp.
• Clean the landing platform, ramps, and trailer floor
before loading or unloading. Grease, mud, or ice on
the trailer, landing platform, and ramps can cause
the machine to slide and tip over.
Loading the Machine
NOTE: Do not load or unload the machine without a
landing platform or ramps.
0000723
Figure 4-80
Use a landing platform or ramps when loading or
unloading the machine.
When loading the excavator with work equipment
installed, place the work equipment in the front and travel
forward.
0000724
Figure 4-81
When loading the excavator without work equipment
installed, travel in reverse up the ramps. Maintain the
ramps to no more of an angle than 15°.
0000725
Figure 4-82
Use the following procedures during loading:
1. Align the centerline of the machine to the trailer
centerline.
2. Slowly drive the machine up the ramps.
3. When the machine tilts toward the trailer side, lower
the bucket close to the trailer floor. Drive slowly until
the tracks are completely on the trailer.
0000726
Figure 4-83
4. Slightly raise the bucket. Retract the arm and keep it
in a lower position. Slowly swing the upper structure
180°. Lower the dozer blade.
5. Fully curl the bucket and arm. Slowly lower the
boom.