4.8 Service procedure When required Maintenance Clean inside of cooling system z Immediately after the engine is stopped, the engine coolant is hot and the pressure inside the radiator is high. Removing the cap and draining the water under this condition could cause burns. Allow the engine to cool down. Then turn the cap slowly to release the pres- sure. z Start the engine and flush the system. When standing up or leaving the operator's seat, set the safety lock lever to the LOCK position. z For details of starting the engine, see "Walk-around check (3-55)" in the OPERATION section of the Opera- tion and Maintenance Manual.
z When the undercover is removed, there is danger of touching the fan. Never go to the rear of the machine when the engine is running. Clean the inside of the cooling system, change the coolant and replace the corrosion resistor according to the table below. Stop the machine on level ground when cleaning the inside of cooling system or changing the coolant. Use a permanent type of antifreeze. If, for some reason, it is impossible to use permanent type anti- freeze, use an antifreeze containing ethylene glycol. Super Coolant (AF-ACL) has an anti-corrosion effect as well as an antifreeze effect.
The ratio of antifreeze to water depends on the ambient temper- ature, but to obtain the corrosion resistance effect, a minimum ratio of 30% by volume is necessary. 4-26 WA150-5H – VEAM934100 WARNING WARNING Kind of coolant Cleaning inside of cooling system and changing coolant Adding corrosion resistor agent KI (No. 600-411-1120) Permanent type antifreeze (All season type) Every year (autumn) or every 2000 hours whichever comes first Every 1000 hours and when cleaning the inside of the cooling system and when changing coolant.
Non-permanent type antifreeze containing ethylene glycol (winter, one season type) Every 6 months (spring and autumn) (Drain antifreeze in spring, add antifreeze in autumn) When not using antifreeze Every 6 months or every 1000 hours whichever comes first