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(2) Intake air cooling vent (back)
Procedures to be performed after every 100 hours of use
1. Remove the muffler, insert a screwdriver into the vent, and wipe away any carbon build-up. Wipe away any carbon build-up on the muffler exhaust vent and
cylin der exhaust port at the same time.
2. Tighten all screws , bolts, and fittings.
3. Check to see if any oil or grease has worked its way in between the clutch lining and drum, and if it has, wipe it away using oil-free, lead-free gasoline.
Oiling port (Z17)
(1) Oiling port
Dismount the guide bar and check the oiling port for clogging.
Guide bar (Z18)
Remove sawdust in the bar groove and the oiling port.
(1) Groove (2) Oiling port
(Type: Sprocket nose)
Grease the nose sprocket from the feeding port on the tip of the bar.
(Z19):
(1) Grease port (2) Sprocket
The bar rail should always be a square. Check for wear of the bar rail. Apply a ruler to the bar and the outside of a cutter. If a gap is observed between them,
the rail is normal. Otherwise, the bar rail is worn. Such a bar needs to be corrected or replaced.
(Z20): (1) Ruler, (2) Gap, (3) No gap. (4) Chain tilts
Sprocket (Z21)
Check for extensive wear, and replace it when the teeth are worn over 0.3 mm.
(1) Sprocket
Saw chain
Warning: It is very important for smooth and safe operation to keep the cutters always sharp.
Your cutters need to be sharpened when:
Sawdust becomes powder-like.
You need extra force to saw in.
The cut way does not go straight vibration increases.
Fuel consumption increases.
Transmission
The reduction gears are lubricated by angled transmission grease in the transmission.
Supply new grease every 25 hours of use or more often depending on the job condition.
When adding lubricant, use a grease gun to insert lubri cant into the three grease nipples located on the trans mission.
Troubleshooting
Case 1. Starting failure
Check
Possible causes
Action
Fuel tank
Incorrect fuel
Drain it and use correct fuel
Fuel filter
Fuel filter is clogged
Clean
Carburettor adjustment screw
Out of normal range
Adjust to normal range
Sparking (No spark)
Spark plug is faulty/wet, plug gap is incorrect
Clean/Dry, correct (gap: 0.6-0.7mm)
Spark plug
Disconnected
Re-tighten
Case 2. Engine starts but does not keep running/hard restarting
Fuel Tank
Incorrect fuel or staled fuel
Drain it and use correct fuel
Carburettor adjustment screw
Out of normal range
Adjust to normal range
Muffler, cylinder (exhaust port)
Carbon is built up
Wipe away
Air cleaner
Clogged with dust
Wash
Cylinder fin, fan cover
Clogged with dust
Clean
When your unit seems to need further service, please consult with our service shop in your area.
