Maintenance Of Saw Chain And Guide Bar - Zenoah G4501 Owner's Manual

2. Fuel filter
(a) Using a wire hook, take out the filter from the filler
port.
Fuel filter
(b) Disassemble the filter and wash with gasoline, or
replace with a new one if needed.
NOTE
• After removing the filter, use a pinch to hold the end
of the suction pipe.
• When assembling the filter, take care not to allow filter
fibers or dust inside the suction pipe.
3. Oil tank
With a wire hook, take out the oil filter through the filler
port and clean in gasoline. When putting the filter back
into the tank, make sure that it comes to the front right
corner. Also clean off dirt in the tank.
Oil filter

11. Maintenance of Saw Chain and Guide Bar

■ Saw Chain
WARNING
• It is very important for smooth and safe operation
to always keep the cutters sharp.
The cutters need to be sharpened when:
• Sawdust becomes powder-like.
• You need extra force to saw in.
• The cut path does not go straight.
• Vibration increases.
• Fuel consumption increases.
Cutter setting standards:
WARNING
• Be sure to wear safety gloves.
Before filing:
• Make sure the saw chain is held securely.
• Make sure the engine is stopped.
• Use a round file of proper size for the chain.
Chain type: 21BPX
File size: 3/16 in (4.8 mm)
01-G4501･5201･5201P_GB_306＿四.indd 13
4. Spark plug
0.6 ~ 0.7 mm
Clean the electrodes with a wire brush and reset the gap
to 0.65 mm as necessary.
5. Sprocket
Check for cracks and for excessive wear interfering with
the chain drive. If the wear is considerable, replace it
with new one. Never fit a new chain on a worn sprocket,
or a worn chain on a new sprocket.
6. Front and Rear dampers
Replace if adhered part is peeled or crack is observed
on the rubber part.
Place the file on the cutter and push straight forward.
Keep the file position as illustrated.
After each cutter has been filed, check the depth gauge
and file it to the proper level as illustrated.
Appropriate gauge
checker
Make the shoulder round
Depth gauge standard
0.025" (0.64 mm)
G4501/G5201/G5201P
G4501 G5201/
G5201P
Champion RCJ-6Y RCJ-6Y
NGK BPM7A BPM8Y
G
B
GB-13
13.6.20 11:29:41 AM