Craftsman 316351930 user manual download

For Devices:Craftsman 316351930   and 2 more
Languages:English
Pages:24
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Page 7 of 24
CHAIN
MAINTENANCE
For smooth and fast cutting,
the chain needs to be maintained
properly.
The following
conditions
indicate that the chain
requires sharpening:
Wood chips are small and powdery.
The chain
must be forced
through
the wood
during cutting.
The chain
cuts to one side.
During
maintenance
of the chain, consider
the following:
The depth
gauge (or raker clearance)
setting
determines
the height
at which the cutter
enters the wood
and the size of the wood
chip
that is removed
(Fig. 40). Too much
clearance
increases
the
potential
for kickback.
Too little clearance
decreases
the size of
the wood
chip, thus
decreasing
the chain's
cutting
ability.
If the cutter
teeth have hit hard objects,
such as nails and stones,
or were abraded
by mud or sand on the wood,
have a service
dealer sharpen the chain.
NOTE:
Inspect
the drive sprocket
for wear or damage
when
replacing
the chain.
If signs of wear or damage
are present
in the areas indicated,
have the drive sprocket
replaced
by
an authorized
service
center.
NOTE:
If you do not fully
understand
the correct
procedure
for
sharpening
the cutters
after reading
the instructions
that
follow,
have the saw chain sharpened
by an authorized
service center
or replace the chain with
a recommended
low-kickback
chain.
SHARPENING
THE
CUTTERS
_
ARNING:
A dull or improperly
sharpened
chain
can cause
excessive
engine
speed
during
cutting,
which
may result
in severe engine
damage.
_
WARNING:
Improper
chain
sharpening
increases
the potential
of kickback.
Failure to replace or repair a
damaged
chain
can cause
serious
injury.
Be careful to file all cutters
to the specified
angles and to the same
length.
Fast cutting
can be obtained
only when
all cutters
are uniform.
Tighten the chain tension
enough
so that the chain
does not
wobble.
Do all of the filing at the midpoint
of the guide bar. Wear
gloves for protection.
Use a 3/16"
round file and holder.
Keep the file level with the top
plate of the tooth
(Fig. 41). Do not
let the file dip or rock (Fig. 42).
Using light but firm pressure,
stroke towards
the front corner of the
tooth
(Fig. 42). Lift the file away from the cutter
before returning
the file to the beginning
of the sharpening
stroke.
Put a few firm strokes
on every tooth.
File all left hand cutters
in
one direction
(Fig. 43). Then move to the other side and file the
right hand
cutters
in the opposite
direction
(Fig. 43). Occasionally
remove filings
from the file with
a wire brush.
Top Plate
Filing
Angle
CORRECT
(30°) - File holders are marked with
guide marks to align
the file properly
and produce the correct
top plate angle (Fig. 44).
INCORRECT
(LESS THAN
30 °) - For cross
cutting
(Fig. 45).
INCORRECT
(MORE THAN 30 °) - This creates a feathered
edge
that dulls quickly.
Side
Plate
Filing
Angle
CORRECT
(80 °) - This is produced
automatically
if the correct
diameter
file is used in the file holder (Fig. 44).
INCORRECT
(HOOK) - This causes the chain to "grab"
and dull
quickly,
increasing
the potential
for kickback.
A hook is caused
by
using a file with
too small a diameter
or a file held too low (Fig. 45).
INCORRECT
(BACKWARD
SLOPE) - This causes
a need for too
much
feed pressure,
producing
excessive
wear to the guide bar
and chain. A backward
slope
is caused
by using a file with
too
large a diameter
or a file held too
high.
MAINTAINING
DEPTH
GAUGE
CLEARANCE
Maintain the depth gauge at a clearance
of 1/32" (0.6 mm). Use a
depth gauge tool for checking the depth gauge clearances.
(Fig. 40)
Every time the chain
is filed, check the depth
gauge clearance.
Use a flat file and a depth
gauge jointer
to lower all gauges
uniformly
(Fig. 46). Use a 1/32 inch (0.6 mm) depth
gauge jointer.
After lowering
each depth
gauge,
restore the original
shape
by
rounding
the front
(Fig. 47). Be careful not to damage
adjoining
drive links with
the edge of the file.
Depth gauges
must be adjusted
with the flat file in the same
direction
the adjoining
cutter
was filed with
the round
file.
Use care not to contact
the cutter
face with the flat file when
adjusting
depth gauges.
Raker
Clearance
1/32"
(0.6
mm)
Cutting
Corner
Gullet
J-
-_ _J,J
Fig. 40
Filing
Height
Fig. 41
Filing
Angle
Fig.
42
Left Hand
Cutters
Right
Hand
Cutters
Fig.
43
Correct
Filing
Angles
Top
Plate
30°
Side
Plate
__
Fig.
44
incorrect
Less
Than
30
°
More Than
30
°
Filing Angles
@
@
Top Plate
Hook
Backward Slope
Fig.
45
Depth
Gauge
Jointer
Fig.
46
Fiat
File
Restore
Original
Shape
by
Rounding
the
Front
MAINTAINING
THE
GUIDE
BAR
To minimize
guide bar wear, the following
maintenance
procedures
are recommended:
Rotate the guide bar frequently
at regular intervals
(for example,
after every
5 hours of operation),
to ensure even wear on the top
and bottom
of the guide bar (Fig. 48).
Clean the guide bar groove
and oil passages whenever the saw chain
is removed, when the unit has been used heavily or when the saw
chain appears dirty (Fig. 49). Oil passages can be cleaned with a soft
wire small enough to insert into the oil discharge hole (Fig. 49).
NOTE:
If the oil passages
are clear, the saw chain will give off a
spray
of oil within
seconds
of starting the unit.
Frequently
check
the guide bar for damage.
Feathering
and burring of
the guide bar rails (the ridges
on either side of the bar groove)
is a
normal process
of guide bar wear. Such faults should
be smoothed
with
a file as soon as they occur.
A guide bar with
the following
faults should
be replaced:
Wear inside the guide bar rails that permits
the chain to lay sideways.
Bent guide bar.
Cracked
or broken
rails.
Spread
rails.
Lubricating
the
Guide
Bar
Sprocket
Tip
CAUTION:
The guide
bar sprocket
tip was
pre-
lubricated
at the factory.
Lubrication
of the guide bar
sprocket
tip is recommended
after
every
10 hours
of
operation
or once
per week,
whichever
comes
first.
Always
thoroughly
clean
the guide bar sprocket
tip
before
lubrication.
Failure to lubricate
the guide
bar
sprocket
tip as explained
below will result
in poor
performance
and seizure, voiding
the warranty.
NOTE:
It is not necessary
to remove the saw chain to lubricate
the
guide bar sprocket
tip.
1.
Clean the guide bar sprocket
tip.
2.
Insert the tip of the lube gun (not included)
into the lubrication
hole and inject grease until it appears
at the outer edge
of the
guide bar sprocket
tip (Fig. 50).
NOTE:
The lube gun is recommended
for applying
grease
to the
guide bar sprocket
tip. The lube gun is equipped
with a
needle nose tip, which
is necessary
for the efficient
application
of grease to the guide bar sprocket
tip.
3.
Rotate the saw chain
by hand. Repeat
the lubrication
procedure
until the entire guide bar sprocket
tip is greased.
CLEANING
THE AIR FILTER
I_
! CAUTION:
Never operate
the unit without
the air
i
filter, Dust and dirt will be drawn
into the engine
and
damage
it. Keep the air filter clean,
1.
Remove
the air filter cover
by loosening
the cover-retaining
screws
(Fig. 51). The cover
will lift off.
2.
Remove
the air filter.
3.
Wash the air filter in clean, warm,
soapy
water. Rinse the air filter
in clean, cool water. Allow
the filter to air dry completely.
NOTE:
It is advisable
to have a supply
of spare air filters.
4.
Install the air filter and replace the air filter cover. Make
sure the
air filter
cover fits
properly.
Tighten
the cover-retaining
screws
securely.
CLEANING
THE
SPARK
ARRESTOR
SCREEN
NOTE:
A clogged
spark
arrestor
screen will dramatically
reduce
engine
performance.
1.
Locate
the muffler assembly
at the front of the unit.
Use a small
2.
3.
4.
5.
6.
7.
8.
g.
NOTE:
Do not operate
the unit without
the plugs
securely
installed.
INSPECTING/ADJUSTING/REPLACING
THE SPARK
PLUG
NOTE:
For efficient
operation,
the spark
plug must be kept clean
and properly
gapped.
0
Fig.
48
Fig.
49
Fig.
50
Fi,ter
Fig.
51
Outer
Spark
Muffler
Deflector
Arrestor
Assembly
/P"
Plugs (2)
assembly,flat-blade
screwdriver
t° rern°ve
the tw°
plugs fr°rn
the muffler
IG!_4
(_/_
__
Use a T27 Torx wrench
to remove
the two
muffler-retaining
screws
(Fig. 52).
Deflector-retaining
Remove
the muffler
assembly
and gasket
from the unit.
Screw
Muffler-retaining
Screws
Use the multi-purpose
tool or a #2 Phillips screwdriver
to remove
Fig.52
the deflector-retaining
screw.
Remove
the outer deflector
and spark
arrestor
screen.
Use a small wire brush to remove debris
from the spark
arrestor
screen.
Reconnect
the spark arrestor
screen and outer deflector
to the muffler assembly.
Make sure the two tabs on the outer
deflector
are inserted
into the two
slots on the muffler assembly. Tighten the deflector-retaining
screw
securely.
Insert the two
muffler-retaining
screws
into the muffler
assembly.
Place the gasket behind
the muffler
assembly
so
that the two
muffler-retaining
screws
pass through
the two
holes in the gasket.
Make
sure the narrow
end of the
gasket faces
the bottom
of the muffler
assembly
(Fig. 52). Insert the muffler assembly
and gasket into the cavity
at
the front of the unit so that the screws
align with the two screw
holes
in the front cavity. Tighten
the muffler-
retaining
screws
securely
to a torque of 80-90
in.lbs. If necessary,
hold the gasket from the side with
a pair of
needle-nose
pliers while
tightening
the screws.
If assistance
is required
for achieving
the proper
torque,
have the
unit serviced
by an authorized
service dealer.
Insert the two
plugs
into the muffler
assembly.
With a blunt tool,
lightly tap the plugs firmly
into place.
I_
I WARNING:
Do not sand
blast,
scrape
or clean
i
spark
plug electrodes.
Dislodged
grit could
damage
the cylinder.
Replace
corroded
spark
plugs.
1.
Push the stop
switch
up to the STOP position.
2.
Use the multi-purpose
tool to remove the two retaining
screws
from the top
plate (Fig. 53). Remove
the top
plate.
3.
Disconnect
the wire connector
from the spark
plug by pulling
and
twisting
at the same time
(Fig. 53).
4.
Remove
the spark
plug with a spark
plug socket
wrench.
DO NOT
USE ANY
OTHER
TOOL.
Fig.
53
5.
Check the electrode
gaps with a wire feeler gauge.
The gap should
be set to 0.025
in. (0.635
mm). Adjust the gaps
if necessary.
6.
Reinstall
the correctly
gapped
spark
plug or, if needed,
install a new spark
plug (Champion®
RDJ8J or equivalent).
NOTE:
A resistor
spark
plug must
be used for replacement
(part number
753-06269
or Champion®
RDJ8J).
CARBURETOR
ADJUSTMENT
The carburetor
was
pre-set at the factory
for optimum
performance.
If further
adjustments
are necessary,
please have
the unit serviced
by an authorized
service dealer.
Fig.
47
Sample