Kohler KD 626/3, Workshop Manual

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Tank
Danger – Attention
Do not smoke or use naked flames during the demounting ope-
rations as these could cause explosions or fire outbreaks.
Fuel fumes are highly toxic. Only carry out the operations outdo-
ors or in a well ventilated place.
Keep your face well away from the filler cap or you could inhale
harmful fumes. Dispose of fuel in the correct way as it is highly
polluting. Do not litter.
Remove fuel filter and loosen clamp screws.
Completely empty the tank and check that no impurities are found in-
side.
Check that cap breather is not clogged.
Disassembly / Reassembly
Flywheel
Danger – Attention
During the demounting phases, pay particular attention to pre-
vent the flywheel from dropping as this could seriously injure
the operator.
Wear protective goggles when removing the flywheel ring.
Remove the bolts which attach the flywheel to the crankshaft.
To replace starter ring gear heat it up to 300°C for 15 ÷ 20 minutes.
Drive it onto the flywheei caretully checking that it perfectly fits into its
seat.
Let it cool down slowly.

When reassembling gradually tighten the fastening screws to 140
Nm on the crankshaft using a torque wrench.
Valve / rocker arm clearance
Caution – Warning
Make settings when the engine is cold.
Remove the rocker arm covers and make sure the seals are intact,
otherwise replace them. Bring the cylinder piston that is to be adju-
sted to the compression top dead centre.
Loosen the fastening nut C , insert the thickness gauge D between the
rocker arm and the top of the valve stem, then, using a cross-head
screwdriver turn the adjusting screw B to set clearance.
Tighten the fastening screw C and check valve clearance A again to
ensure that it is between 0,15 and 0,2 mm for intake and 0,3 ÷ 0,35
mm for exhaust.

When refitting tighten cover screws to 20 Nm.
If necessary place a 0,30 or 0,40 mm shim at B .
KD Workshop Manual_cod. ED0053029350_
1° ed
_ rev.
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