Yanmar 2V Series Operation Manual page 95

Engine coolant contaminated with rust or scale
reduces the cooling effect. Even when extended life
engine coolant is properly mixed, the engine
coolant gets contaminated as its ingredients
deteriorate. Replace the engine coolant every 400
hours or once a year.
1. Remove the radiator cap (Figure 7, (1)).
(1)
(2)
Figure 7
2. Loosen and remove the radiator hose
(Figure 7, (2)) and drain the engine coolant.
3. After draining the engine coolant, reinstall and
tighten the radiator hose (Figure 7, (2)).
4. Fill radiator and engine with engine coolant.
See Filling Radiator With Engine Coolant on
page 39.
2V Operation Manual
Adjust Intake / Exhaust Valve
Clearance (Second Time and After)
Proper adjustment is necessary to maintain the
correct timing for opening and closing the valves.
Improper adjustment will cause the engine to run
noisily, resulting in poor engine performance and
engine damage. Consult your authorized Yanmar
industrial engine dealer or distributor to adjust the
intake / exhaust valve clearance.
Check and Adjust the Idling Speed
Proper adjustment is necessary to maintain the
correct idling speed. Improper adjustment will
cause the engine to run incorrectly, resulting in poor
engine performance and engine damage. Consult
your authorized Yanmar industrial engine dealer or
distributor to adjust the idling speed.
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PERIODIC MAINTENANCE
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