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16
BAR MAINTENANCE
If your pruner cuts to one side, has to be
forcedthrough thecut,or beenrunwith anim-
proper amount of bar lubrication it may be
necessary to serviceyourbar. Aworn barwill
damage your chain and m ake cutting difficult.
After each use, with unit disconnected f rom
pow er so urce, clean all sawdust from the
guide bar and sprocket ho le.
To m aintain guide bar:
S Disconnect pruner from power source.
S Loosen and remove bar clamp nut and
chain brake. Remove bar and chain from
pruner .
S Clean the oil holes and bar groove after
each 5 hours of operation.
Remove Sawdust From
Guide Bar Groove
Oil Holes
S Burring of guide bar rails is a normal
process of rail wear . Remove these burrs
with a flat file.
S When rail top is uneven, use a flat file to re-
store square e dges and sides.
Correct GrooveWorn G roove
File Rail Edges
and S ides
Square
Replace guide bar when the groove is worn, the
guide bar is bent or cracked, or when excess
heating or burring of the r ails occurs. If replace-
ment isnecessary,useonly t heguide barspeci-
fied for your pruner in the repair parts list.
LUBRICATION
Bar Oil
Fill Cap
S See GUIDE BAR AND CHAIN OIL under
the OPERATION section.
SERVICE AND ADJUSTMENTS
WARNING: Disconnect unit from
power source before performing service or
making adjustments.
CHAIN SHARPENING
Improper chain sharpening techniques and/or
depth gauge maintenance will increase the
chance of kickback which can r esult in serious
injury.Wear protective gloves when handling
chain. The chain is sharp and can cut you even
when it is not moving.
Conditions which indicate the need f or chain
sharpening:
S Reductioninsize ofwoodchips.The sizeof
the wood chip will decrease as the chain
gets dulleruntil itbecomesmore like apow-
der than a chip. Note that dead or rotted
wood will not produce a good chip.
S Saw cuts to o ne side or at an angle.
S Saw has to be forced through the cut.
Tools required:
S 3/16 in ch (4,5 mm) diameter round file and
file holder
S Flat file
S Depth gauge tool
TO SHARPEN CHAIN:
1. Disconnect p runer fr om power source.
2. Check chain for p roper tension. Adjust
chain tension if necessary. See CHECK
CHAIN TENSION section.
3. Sharpen cutters.
S To sharpen the cutters, position the
fileholder level (90˚) sothat itrestson
the t op edges of the cutter and depth
gauge.
NOTE: The chain has both left and
right hand cutters.
Depth Gauge
File
File Holder
Cutter
90˚
S Alignthe 30˚ fileholder marks parallel
with the bar and to the center of the
chain.
Cutter
Cutter
30˚
File Holder Line
S S harpen cutterson onesideof the chain
first. File from the inside ofeach cutterto
the outside. Then, turn the chain saw
around and repeat the process for the
other side of the chain.
S Fileon the forward stroke only. Use 2
or 3 strokes per cutting edge.
S Keepall cutters thesamelengthwhen
filing.
S Fileenough to remove an y damageto
cuttingedges (side plate andtop plate
of cutter).
A
ll Cutters
Same Length
Remo
v
e Damage
Top Plate
Side Plate
S File chain to meet the specifications
as shown.