SANY SY155U, Operation And Maintenance Manual, Page: 160 / 192

5-50
MAINTENANCE
SY155U Excavator OMM
Increase the Track Tension
0004180
Figure 5-112
1. Loosen the upper access panel fastener (1).
2. Remove the lower access panel fastener (3) and
swing the access panel (2) up.
3. Tighten the upper access panel fastener to hold the
access panel in place.
0003579
Figure 5-113
4. Add grease through the grease fitting (4). This will
move the idler and increase the track tension.
5. Slowly move the machine forward 23 ft.–26 ft.

(7 m–8 m).
6. Stop the machine.
7. Check the track tension.
8. Add grease until an acceptable range is reached.
NOTE: If the tension is still loose, contact a SANY dealer
to determine the cause and remedy.
9. Swing the access panel into place and install the
lower fastener.
Decrease the Track Tension
0004180
Figure 5-114
WARNING
• The track-tension grease fitting is under extreme
pressure. Grease can exit the grease valve and
cause serious injury.
• Wear safety goggles, gloves, and other personal
protective equipment (PPE) to prevent serious
injury.
• Do not stand directly in front of the track-tension
grease fitting valve when loosening the valve.
Failure to follow these warnings could result in
death or serious injury.
1. Prepare the machine for checks and inspections.
See “Maintenance Safety” on page 2-5.
2. Open the appropriate access covers or compartment
doors. See “Doors, Panels, Covers, and Filler Cap”
on page 4-5.
3. Turn the battery disconnect switch to OFF. See
“Battery Disconnect Switch” on page 3-15.
4. Loosen the upper access panel fastener (1).
5. Remove the lower access panel fastener (3), and
swing the access panel (2) up. Tighten the upper
access panel fastener to hold the access panel in
place.
6. Clear any gravel or mud from between the sprocket
and the track link before decreasing track tension.
2
3
1
4
2
3
1