SANY SY155U, Руководство по эксплуатации и обслуживанию, Страница: 159 / 192

MAINTENANCE
5-49
SY155U Excavator OMM
Check the Carrier Roller
0004188
Figure 5-109
1. Prepare the machine for checks and inspections.
See “Maintenance Safety” on page 2-5.
2. Turn the battery disconnect switch to OFF. See
“Battery Disconnect Switch” on page 3-15.
3. Check the carrier roller (1) for cracks and distortion. If
the carrier roller is cracked or distorted, contact a
SANY dealer.
Check Carrier Roller Mounting Fasteners
0004188
Figure 5-110
1. Prepare the machine for checks and inspections.
See “Maintenance Safety” on page 2-5.
2. Turn the battery disconnect switch to OFF. See
“Battery Disconnect Switch” on page 3-15.
3. Inspect the mounting fasteners (1) that secure the
carrier roller to the track frame for rust, damage, or
looseness.
NOTE: Use anaerobic thread-lock compound when
tightening and installing fasteners.
4. Replace any damaged or defective fasteners and
tighten any loose fasteners.
Check and Adjust the Track Tension
1. If the track tension is noticeably loose, operate the
machine with the engine at idle speed.
2. Travel forward about 13 ft. (4 m) on a flat, level, and
stable surface.
3. Stop the machine.
4. Shut down the engine.
5. Prepare the machine for checks and inspections.
See “Maintenance Safety” on page 2-5.
6. Turn the battery disconnect switch to OFF. See
“Battery Disconnect Switch” on page 3-15.
0003693
Figure 5-111
7. Place a straightedge (1) on the track above the
carrier roller (2).
8. Measure the track-sag value (3), the distance
between the straightedge and the track, using a ruler.
NOTE: The acceptable range is 0.4 in.–1.2 in.

(10 mm–30 mm).
9. If the track sag is outside the acceptable range,
adjust track tension as needed.
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