YM D 3100 Series Operating instructions

Check if there is any leakage of oil or water at the outside of the engine.
Check double times the level of oil from oil level stick. If the level is below
the bottom sign of the level stick please add oil from top as seen on the
picture until oil level reaches to mid of low high level of level stick.
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OIL SUPPLIMENT COVER
OIL LEVEL CHECK STICK

Replace the oil and oil filter on periods mentione on the periodic
maintenance manual. Do not forget the very first oil filter replacement is
after 50 Hours of engine run. Use original oil filters. After replacement
tighten the filter by turning ¾ times after reaching to tightening point.
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OIL FILTER

Be careful to avoid heat sources during replacement of fuel filters. During
loosining of fuel filter some amount of fuel may leak. After replacement of
fuel filter by using the fuel feed pump evacuate the air inside the fuel pipes
of the engines.
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FUEL FILTER FUEL FEED PUMP

Check antifreeze ratio before winter. Always add antifreeze
according to -100C less than min level recorded in the area. Check
the radiators fins if it is enough clean or not. If dirty please clean with
pressurized water.
If your engine is under cover or installed in a closed area then
strictly apply the regulations or rules of the applicant compnay which
uses our engine.
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WARNING : Never use salty or limed water in the radiator.
RADIATOR WATER COVER

Discharge the water inside the radiator by using the hose seen in
the picture. Eventhough the engine runs in hot weather conditions
add some antifreeze to water to avoid corrosion.
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RADIATOR WATER
DISCHARGE HOSE
WARNING : Never use salty or limed water in the radiator.

If you use your engine under dirty conditions frequently check your
air filter as seen in picture. Give pressureized air through inside the
air filter. Please keep in mind that engine performance is directly
related with the amount of water sucked in to the engine.
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AIR FILTER

Chek the tightness of the fuel pipes connections and adapters by
using a suitable wrnech. Also check the tightness of the clamps of
radiators hoses.
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INSIDE THE RADIATOR FUEL PIPES

Replace the v-belt without removing the radiator. It is posible to to this. After
replacing the v-blet tighten the belt via alternator. The tightness of the v-belt can
be check as follows : The belt shall move 1-2 cm towards the crankshaft pulley
when check at the midway of the longest visible lenght.
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V-BELT

Disassemble the upper cover of cylinder head. Adjust valve and rocker arm gaps.
When engine is hot:
Intake : 0.25 mm
Exhaust : 0.35 mm
When engine is cold :
Intake : 0.30 mm
Exhaust : 0.40 mm
WARNING : Adjustment of valves by unexperienced personel may cause serious
damages to your engine. !
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VALVES