16

BAR MAINTENANCE

If your pruner cuts to one side, has to be
forcedthrough the cut , or been run with anim-
proper amount of bar lubrication it may be
necessary to service your bar. A worn bar will
damageyour chain and make c uttingdifficult.
After eac h use, with unit disconnected from
power source, clean all sawdust from the
guidebar and s procket hole.
Tomaintain guide bar:
SDisconnect pruner from power source.
SLoosen and remove bar clamp nut and
chain brake. Remove bar and chain from
pruner.
SClean the oil holes and bar groove after
each 5 hours of operation.
RemoveSawdust From
Guide Bar Groove
Oil Holes
SBurring of guide bar rails is a normal
process of rail wear. Remove these burrs
with a flat file.
SWhenrail top is unev en, use a flat file to re-
store square edges and sides.
CorrectGrooveWornG roove
File Rail Edges
andS 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 rails occurs. If replace-
mentis neces sary, use only the guide bar s peci-
fied for your pruner in the repair parts list.

LUBRICATION

BarOil
Fill Cap
SSee GUIDE BAR AND CHAIN O IL under
the OPERATION section.
SERVICE AND ADJUSTMENTS
WARNING: Dis connect 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 c anres ult in serious
injury.Wear protective gloves when handling
chain. The chain is sharp and can cut you ev en
when it is not moving.
Conditions which indicate the need for c hain
sharpening:
SReductionin size of wood chips .T he size of
the wood chip will decrease as the chain
getsduller until it becomes more lik e apow-
der than a chip. Note that dead or rotted
wood will not produce a good chip.
SSaw cuts to one side or at an angle.
SSaw has to be forced through the cut.

Toolsrequired:

S3/16i nch (4,5 mm) diameter round file and
file holder
SFlat file
SDepth gauge tool

TO SHARPEN CHAIN:

1. Disconnect pruner from pow er source.
2. Check chain for proper tens ion.A djust
chain tension if necessary. See CHECK
CHAIN TENSION section.
3. Sharpen cutters.
STo sharpen the cutters, position the
fileholder level (90˚) s o that it rests on
the top edges of the cutter and depth
gauge.
NOTE: The chain has both left and
right hand cutters.
Depth Gauge
File
File Holder
Cutter 90˚
SAlignthe 30˚file holder mark s parallel
with the bar and to the center of the
chain.
Cutter
Cutter
30˚
File Holder Line
SSharpencutter s on one side of the chain
first. File from the inside of each cutter to
the outside. Then, turn the chain saw
around and repeat the process for the
other side of the chain.
SFileon the forw ard stroke only. Use 2
or 3 strokes per cutting edge.
SKeepall cutters the s ame lengthw hen
filing.
SFileenough to remove any damage to
cuttingedges (s ide plate and top plate
of cutter).
A
ll Cutters
Same Length
Remo
v
e Damage
Top P l a t e
Side Plate
SFile chain to meet the specifications
as shown.