Chain Tension; Chain Maintenance - EarthWise CVP41810 Manual Del Operador

INSTALLING/REPLACING THE GUIDE BAR AND CHAIN
10. Fit the bar flush against the mounting surface so that the bar
stud is in the slot of the bar.
NOTE: When placing the bar on the bar stud, ensure that the
adjusting pin is in the chain tension pin hole.
11. Replace the chain cover.
12. Tighten the tension knob. Remove all slack from the chain by
turning the knob clockwise until the chain seats snugly against
the bar with the drive links in the bar groove. (Fig. 16)
Tension knob

CHAIN TENSION

Stop the motor before setting the chain tension. Make sure the
tension knob is loosened to finger tight, turn the tension knob clock-
wise to tension the chain. A cold chain will be correctly tensioned
when there is no slack on the underside of the guide bar, the chain is
snug, but it can be turned by hand without binding.
Chain must be re-tensioned whenever the flats on the drive links hang
out of the bar groove.
During normal saw operation, the temperature of the chain will
increase. The drive links of a correctly tensioned warm chain will hang
approximately .050 in. (1.25mm) out of the bar groove. (Fig. 17) Be
aware that chain tensioned while warm, may be too tight upon cool-
ing. Check the ―cold tension‖ before next use.
Approx. .050 (1.25mm)
NOTE: A new chain tends to stretch, check chain tension frequently
and tension as required.

CHAIN MAINTENANCE

CAUTION: Disconnect the saw from the power supply and make sure
the chain has stopped before you do any work on the saw.
For smooth and fast cutting, chain needs to be maintained properly.
The chain requires sharpening when the wood chips are small and
powdery, the chain must be forced through the wood during cutting,
or the chain cuts to one side. During maintenance of your chain
remember:
FIG.16
CHAIN TENSION AND MAINTENANCE
FIG.17
13. When the tension knob is fully tightened, the chain is the
tightest. To minor adjust the chain tension, loosen the tension
knob and turn it counter-clockwise slightly until the chain is
correctly tensioned.
NOTE: The chain is correctly tensioned when there is no sag on the
underside of the guide bar, then chain is snug, but it can be turned by
hand without binding.
NOTE: A new chain tends to stretch, check chain tension
frequently and tension as required.
14. After a period of usage, the chain may get loose. To tighten the
chain, loosen the tension knob by turning counter-clockwise,
repeat 12 and 13 to correctly adjust the chain tension.
- Improper filing angle of the side plate can increase the risk
of severe kickback.
- Raker (depth gauge) clearance.

Too low increases the potential for kickback.

Not low enough decreases cutting ability.
- If cutter teeth have hit hard objects such as nails and stones, or
have been abraded by mud or sand on the wood, have service
dealer sharpen 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 a qualified
individual.
HOW TO SHARPEN THE CUTTERS
Be careful to file all cutters to the specified angles and to the same
length, as fast cutting can be obtained only when all cutters are
uniform.
Wear gloves for protection. Properly tension the chain prior to
sharpening. Refer to ―Chain Tension Section‖ earlier in this manual.
Do all of your filing at the midpoint of the bar.
Use a 5/32 in. diameter round file and holder.
Keep the file level with the top plate of the tooth. Do not let the file dip
or rock. Using light but firm pressure, stroke towards the front corner
of the tooth. (Fig. 18)
Cutting
Corner
Top Plate
Side Plate
Rivet Hole Depth Gauge
Heel Toe
Gullet
6
FIG.18