Ryobi TB720r Betreibershandbuch Seite 9

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OPERATING INSTRUCTIONS
9
MAINTENANCE AND REPAIR INSTRUCTIONS
PRUNER BLADE REPLACEMENT
WARNING:
To avoid serious personal injury,
always wear gloves while handling, removing
or installing the blade.
WARNING: The pruner housing gets hot
after long periods of use. To avoid serious
personal injury, do not touch the housing
until it has cooled.
Replacing the Blade
Replace the blade if;
it is missing teeth, dull, bent or damaged.
you are required to force the moving blade though
wood.
the engine slows excessively while cutting.
every one (1) hour (accumulative) of actual cutting
time.
1. Install the blade cover on the blade.
2. Remove the blade clamp screw, lock washer and
blade clamp (Fig. 15).
3. Reinstall the blade following the steps under
Installing the Blade in the assembly section.
Cleaning the Blade
Clean the blade after each use to remove pitch, gum,
sap, etc.
Clean the blade with commercially available saw blade
cleaners. Available at your local hardware store.
Discard the blade if it is missing teeth, dull, bent or
damaged in any way.
Always install the blade cover on the blade when not
in use.
Fig. 15
PRUNING TIPS
Why Prune?
Trees need to be trained. If they are not, they may grow
into a tangled and potentially dangerous area of the
yard. Pruning is useful for sizing, shaping, removing
broken branches and maintaining the health of the tree.
When to Prune?
Pruning can be done at any time during the year. But,
the best time is during the dormant (winter) season.
What to Look for?
Finding problem areas in a tree can be difficult. Look for
and remove:
Dead or dying branches. Cut them back to a healthy
branch or trunk because they may carry insects or
diseases.
PRUNER GEAR HOUSING
All internal parts are lubricated at the factory and require
no maintenance. Do not disassemble the pruner.
Contact an authorized service dealer for any internal
repairs.
CLEANING
Use a small brush to clean off the outside of the unit.
Do not use strong detergents. Household cleaners that
contain aromatic oils such as pine and lemon, and
solvents such as kerosene, can damage plastic housing
or handle. Wipe off any moisture with a soft cloth.
STORAGE
Store the unit inside in a dry place, either locked up or
up high to prevent unauthorized use or damage. Keep
out of the reach of children.
Blade Clamp
Blade Clamp
Screw and
Lock Washer
Branch stubs. These occur when a prior pruning was
done incorrectly or if a branch broke off during a
storm. Cut the stubs back to the closest healthy
branch or trunk.
Future growth. If a tree limb is growing towards a
fence or building, remove it early. The older the tree,
the longer it takes for cutting wounds to heal.
How to Prune Correctly
Dont cause damage to the trunk bark by cutting too
close to the trunk.
Cut the branch so that the wound is as small as
possible.
Dont leave a long branch stub. It can lead to rot or
insect infestation.
Use a sharp blade to make cuts that are clean and
smooth.
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