Toro 007 Maintenance Manual page 45

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3.9. Every 4000 hours
D D D D Drain and replace coolant
Drain the radiator and engine block.
Flush the cooling system.
Install new coolant pre--charge filter.
Fill slowly to avoid air pockets; keep the
radiator bleeder screw open.
D D D D Change thermostats and seals
MAINTENANCE OPERATIONS
TKU--- C 01140--- 1 EN 0404