RedMax GZ4000 - Manual (Page 17)

US-17
GZ4000
U
S
11. Maintenance of Saw Chain and Guide Bar
F40
F39
■ SAW CHAIN
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.
Cutter setting standards:
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 your
chain.
Chain type: 91VG
File size: 5/32 in (4.0 mm)
Place your file on the cutter and push
straight forward. Keep the file position as
illustrated. (F37)
After every cutter has been set, check the
depth gauge and file it to the proper level
as illustrated. (F38)
Be sure to round off the front edge to
reduce the chance of kickback or tie-
strap breakage.
(1) Appropriate gauge checker
(2) Make the shoulder round
(3) Depth gauge standard
WARNING
WARNING
WARNING
Make sure every cutter has the same
length and edge angles as illustrated.
(F39)
(1) Cutter length
(2) Filing angle
(3) Side plate angle
(4) Top plate cutting angle
■ GUIDE BAR
• Reverse the bar occasionally to prevent
partial wear.
• 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. (F40)
(1) Ruler
(2) Gap
(3) No gap
(4) Chain tilts
F37
F38
This saw is equipped with one of the following low
kickback bar/chain combinations:
Model GZ4000
14" Bar : Oregon 140SPEA041
14" Chain : Oregon Doubleguard 91VG052X
WARNING