Maintenance
SY50U Excavator OMM
5-34
Operation and Maintenance Manual — 0120
SANY
6. Drain the engine coolant in the overflow tank (4).
7. Close the drain valve. Add new engine coolant to the
radiator until the level reaches the radiator filler
opening. With the radiator cap removed, run the engine
at low idle for 5 minutes and then at high speed for 5
minutes to bleed air from the cooling system. Allow
engine to cool.
8. Top off the radiator and fill the overflow tank until the
engine coolant is between the FULL and LOW marks.
9. Install radiator cap.
Inspect the Engine Water Pump
Prepare the machine for service. See “Maintenance Safety” on page
If the fan pulley has play, the bearings inside the engine water pump are worn and it must be replaced. Contact a
SANY dealer for additional information.
Fig. 5-25
0002768
4
