Maintenance
SY135C Excavator OMM
5-92
Operation and Maintenance Manual — 0120
SANY
Change the Final Drive Oil
If the hydraulic oil is contaminated (discolored or containing debris), change the oil regardless of the service
interval hours on the machine. If possible, find the cause of the contamination before changing the hydraulic oil.
1. Position the machine on a flat, level surface so the final drive
oil level line (2) is parallel with the ground.
2. Prepare the machine for service. See “Maintenance Safety” on
3. Place a suitably sized container under the final drive drain plug
(4).
4. Loosen the final drive drain plug slowly to relieve remaining
hydraulic system pressure.
5. Remove the oil level check plug (3) and allow the oil to drain.
NOTE:
The oil capacity of the final drive is 1.5 gal.
(5.5 L).
6. Replace the O-ring on the drain plug.
7. Install and tighten the drain plug.
8. Remove the oil filler plug (1) and add oil until the level is within 0.4 in. (10 mm) of the oil level check hole.
WARNING!
• Allow the hydraulic system to cool before servicing. Hot hydraulic oil may cause burns or
other serious injury.
• The hydraulic oil tank may be under pressure, and hydraulic oil may be present at the filler
cap. Relieve hydraulic system pressure to prevent injury.
Failure to follow these warnings could result in death or serious injury.
NOTICE!
Dispose of oil in accordance with all applicable environmental regulations.
Failure to follow this notice could result in damage to the environment.
CAUTION!
Overfilling the final drive case may damage the case seals. This could result in machine
damage and improper machine operation.
Fig. 5-172
1
0000167
2
3
4
