SDMO R33C3 User And Maintenance Manual page 53

Checking the coolant level
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
internal 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.
Warning
Open the radiator filler cap and check the coolant level.
If the coolant level is low, add coolant to the speci-fied level.
Check for leaks in the cooling circuit.
Checking the air filter
A clogged filter element limits the engine's air intake and a reduced air supply to the engine.
Important
If the air filter is fitted with a dust control valve (A), press the tip
of the valve to evacuate any accumulated dust particles.
Check the air filter clogging indicator (B). If the indicator is red,
clean the air filter.
B
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A