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ELECTRIC CHAIN SAW
OPERATING CHAIN SAW
Continued
8.Remove saw from a cut with saw running at full speed. Stop saw by releasing trigger. Make sure chain has stopped before setting saw down.
9.Practice until you can maintain a steady, even cutting rate.
Call Outs For Figure I
1.Switch Lockout
2.Trigger
CHAIN BRAKE
(Models
The chain brake quickly stops the saw chain. Kickback causes the back of operator’s left hand to contact front hand guard (see Figure J). When front hand guard moves forward, the saw chain stops. This reduces the chance of serious injury during kickback. When the chain brake activates, release trigger at once.
To reset chain brake, release trigger and move front hand guard back into position. You must release trigger first. If not, the saw will start when you reset the front hand guard.
!CAUTION: Do not use the chain brake to stop and start your saw. Quick repeated stops may cause overheating of the chain brake. Damage to the chain brake will occur.
Note: Test chain brake before each use. Firmly grip saw with both hands. With saw running, move front hand guard forward with back of left hand. Keep both hands on the handles. Saw chain should stop. If chain brake does not work, have saw repaired by authorized service person.
Call Outs For Figure J
1.Activation of Chain Brake
2.STOP
TRIMMING A TREE (Pruning)
Trimming a tree is the process of cutting limbs from a living tree. Follow directions below to trim a tree.
1.Make first cut 15 cm from tree trunk on underside of limb. Use top of guide bar to make this cut. Cut 1/3 through diameter of limb (see Figure K).
2.Move 5 to 10 cm farther out on limb. Make second cut from above limb. Continue cut until you cut limb off.
3.Make third cut as close to tree trunk as possible on underside of limb stub. Use top of guide bar to make this cut. Cut 1/3 through diameter of stub.
4.Make fourth cut directly above third cut. Cut down to meet third cut. This will remove limb stub.
Call Outs For Figure K
1.1st Cut - Pruning Undercut (to avoid splintering)
2.2nd Cut - Pruning Cut (to avoid pinching)
3.3rd Cut - Stub Undercut (to avoid splintering)
4.4th Cut - Final Stub Cut
FELLING A TREE
(Cutting Down a Tree)
!WARNING: Do not fell a tree without ample skill or expert help. Be aware of your
surroundings. Do not endanger any person, strike utility lines, or cause property damage. If tree strikes utility lines, contact utility company at once.
Felling is the process of cutting down a tree. Follow directions below to fell a tree.
Before Felling a Tree
1.Inspect tree. Make sure there are no dead limbs or branches that may fall on you. Study natural lean of tree, location of larger branches, and wind direction. This will help you judge which way tree will fall.
2.Clear work area around tree.
3.Plan and clear a retreat path before felling. Make
retreat path opposite to planned direction of fall of tree and at 45° angle (see Figure L).
4.Remove dirt, stones, loose bark, nails, staples, and wire from tree where you will make felling cuts.
5.Stay on uphill side when felling tree. Tree could roll or slide downhill after falling.
Call Outs For Figure L
1.Retreat Path
2.Direction of Fall
3.Tree
Felling Procedure
A) Felling Notch
A properly placed felling notch will determine direc- tion tree will fall. Place felling notch on side of tree in direction you want tree to fall (see Figure M). Follow directions below to create a felling notch.
1.Make lower notch cut as close to ground as possible. Hold saw so guide bar is horizontal. Cut 1/3 the diameter of tree trunk (see Figure M). Note: Always make this horizontal lower notch cut first. If you make this cut second, tree can pinch chain or guide bar.
2.Start upper notch cut the same distance above first cut as first cut is deep. Example: If lower notch
cut is 20 cm deep, start upper notch cut 20 cm above it. Cut downward at 45° angle. The upper notch cut should meet end of lower notch cut (see Figure M).
3.Remove tree trunk wedge created by notching cuts.
B) Felling Cut
1.Make felling cut 5 cm higher than lower notch cut and on opposite side of tree (see Figure M). Keep felling cut parallel to lower notch cut.
2.Cut towards notch.
!WARNING: Do not cut all the way through tree. Leave about 5 cm of tree diameter uncut directly behind felling notch (see Figure M). This uncut portion acts as a hinge. The hinge helps keep tree from twisting and falling in wrong direction.
3.As felling cut nears hinge, tree should begin to fall.
Note: If needed, drive wedges into felling cut to control direction of fall. If tree settles back and pinches chain, drive wedges into felling cut to remove saw. Only use wedges made of wood, plastic, or aluminum. Never use wedge made of steel. This could cause kickback and damage to chain.
4.When tree begins to fall, quickly
•remove saw from felling cut
•release trigger and put saw down
•exit area using retreat path
Call Outs For Figure M
1.1st Cut - Lower Notch Cut
2.2nd Cut - Upper Notch Cut
3.3rd Cut - Felling Cut
4.Hinge
5.Direction of Fall
LIMBING A TREE
Limbing is removing branches from a fallen tree. Do not remove larger limbs under tree that support log off ground. Remove each limb with one cut (see Figure N). Clear cut limbs from work area often. This will help maintain a safe work area.
Make sure you start your cut where limb will not pinch saw during cutting. To avoid pinching, start cut on freely hanging limbs from above limb. Start cut on limbs under tension from under limb. If pinch occurs, turn saw off, lift limb, and remove saw.
BUCKING A LOG
!WARNING:
•If on slope, make sure log will not roll down hill. Secure log by using wooden stakes. Stand on uphill side of log while cutting.
•While cutting log, never hold log with your hand, leg, or foot or allow another person to hold log.
Bucking a log is cutting a log into sections. When possible, raise log or section off ground. Do this by using limbs, logs, chocks, etc.
When cutting through log, maintain control by reduc- ing cutting pressure near end of cut.
Follow directions below to buck a log.
Entire Length Of Log On Ground
1. Cut log from top (see Figure O).
Log Supported On One End
1.Make first cut on underside of log (see Figure P). Use top of guide bar to make this cut. Cut 1/3 through diameter of log. This cut will keep section from splintering when cut.
2.Make second cut directly above first cut. Cut down to meet first cut. This cut will keep log from pinching guide bar and chain.
Call Outs For Figure P
1.1st Cut
2.2nd Cut
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