Cooling System; Coolant - Change - SDMO R33C3 User And Maintenance Manual

Cooling system

Coolant - Change

Remove the radiator filler cap only after the engine
has cooled to room temperature. Place a waste cloth
over the cap, and loosen the cap about a half-turn or
stand the lever to the upright position to release inter-
nal pressure. Never open the radiator filler cap while
the engine is hot, otherwise the steam or hot coolant
spurts out and you may be scald with it.
Coolant (containing LLC) drained from the engine is
toxic. Never dispose of coolant into regular sewage.
For disposal of used coolant, consult a dealer of Mit-
subishi Heavy Industries, Ltd. or a industrial waste
disposer.
The service life of LLC is 2 years. Be sure to change
coolant at least once every 2 years.
Coolant - Drain
1. When draining coolant immediately after engine
operation, idle the engine in low gear for 5 to 6 min-
utes until the coolant temperature drops to 70 to 80
°C [158 to 176 °F].
2. Open the radiator filler cap.
3. Place coolant receiving can under the drain cocks
and plugs, and open the coolant drain cocks and
plugs to drain the coolant.
Chapter 8 PERIODIC INSPECTION AND MAINTENANCE PROCEDURES
Coolant drain cock
Fig. 8-18 Coolant drain cock (radiator)
166/242
Stand the lever to
Turn the cap about
the upright position
half a turn
Fig. 8-17 Radiator filler cap
Radiator filler cap
8-11