SANY SY500H, Operation And Maintenance Manual

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MAINTENANCE
5-53 SY500H Excavator OMM
NOTE: Never stand in front of the grease valve (2) when
opening the grease valve. The grease fitting is
under extreme pressure and can exit the grease
valve quickly and forcefully.
3. Using the proper tools, slowly loosen the grease
valve counterclockwise in 90° (1/4 turn) increments
to decrease track tension.
NOTES: The grease will come out from behind the grease
valve.
4. Move the machine back and forth for a short distance
if the grease does not come out smoothly.
5. Check track tension. See “Check the Track Tension”
on page 5-51.
6. When correct tension is obtained, turn the grease
valve clockwise until tight.
7. Move the machine forward at low idle speed for one
complete track revolution.
8. Park the machine.
9. Check track tension again. Readjust if it is still out of
the acceptable range.
Swing Drive
Lubricate the Swing Bearing
Figure 5-110
1. Lubricate the fittings (1) on the swing bearing with
grease until grease seeps out of the seal (2).
2. Check the condition of the seal.
NOTE: If the seal is leaking, replace it immediately.
3. Start the engine.
4. Lift the arm off the ground.
5. Rotate the upper structure 90° and repeat steps 1
and 2.
6. Rotate the upper structure until a full 360° rotation
has been made.
7. Shut down the engine.
Check the Swing Bearing Fasteners
1. Prepare the machine for service. See “Maintenance
Safety” on page 2-4.
Figure 5-111
2. Inspect both rows of swing bearing mounting
fasteners (1) for missing or damaged fasteners.
3. Start the engine and turn the cab 90° to the right.
4. Shut down the engine.
5. Repeat steps 1 through 4 until you have inspected all
of the fasteners.
NOTE: Contact a SANY dealer for missing or damaged
fasteners.
Check the Swing Drive
1. Prepare the machine for service. See “Maintenance
Safety” on page 2-4.
0004749
Figure 5-112
2. Locate and inspect the swing drive (1). Check for
loose or missing fasteners (2) and for damage.
1
2
1
1
2