Maintenance And Repair - Ryobi OHT1850 Operator's Manual

OPERATION
grease, etc. When servicing use only identical Ryobi
replacement parts. Use of any other parts can create
a hazard or cause product damage.
CAUTION
Do not at any time let brake fl uids, gasoline, petroleum
based products, penetrating oils, etc., come in
contact with plastic parts. They contain chemicals
that may damage, weaken, or destroy plastics.

MAINTENANCE AND REPAIR

REPLACING BLADES
WARNING
Blades are sharp. When handling blade assembly,
do not place your hand or fi ngers between blades
or in any position where they could get pinched or
cut. NEVER touch blades or service unit with battery
pack installed.
REMOVING THE BLADE (Fig. 6 & 7)
■ Remove battery pack from hedge trimmer.
■ Place hedge trimmer upside down on a workbench and
remove four (4) blade cover screws.
■ Remove blade cover. See Figure 6.
■ Remove bar plate from the two pins. See Figure 7.
■ Remove retaining ring, washer and retaining plate. See
Figure 7.
■ Align the cams.
NOTE: The yokes can not be lifted unless it clears the lip
of the cams.
■ Remove the four (4) blade screws.
■ Each blade has an oval yoke attached at one end. Slide
the blades into position so the yokes align. Remove the
blade from the housing.
INSTALLING THE BLADE (Fig. 6 & 7)
■ Align the cams.
■ Place new blade on housing and align yokes to drop into
place. Rotate the blade so that it drops past the lower cam.
NOTE: When properly aligned, the blade assembly
fi ts in recessed slot in motor housing.
■ Re-Install the four (4) blade screws and tighten
securely.
090905002-02.indd 6 090905002-02.indd 6
ENGLISH
■ Re-Install retaining plate, washer and retaining ring.
■ Re-Install the bar plate over the two pins.
■ Install the blade cover using the 4 blade cover screws.
Tighten securely.
WARNING
Make sure bottom plate is replaced before inserting
the battery pack, and starting the hedge trimmer.
Failure to do so will expose internal parts, which
could cause an accident or electrical shock, resulting
in serious injury.
NOTE: If binding occurs after replacing the blade assembly,
repeat the steps under Removing the Blade and Installing
the Blade.
BLADE MAINTENANCE – HEDGE TRIMMER
WARNING
Battery units do not have to be plugged into an
electrical outlet; therefore, they are always in
operating condition. To prevent serious personal
injury, always remove the battery and take extra
precautions and care when performing maintenance,
service or for changing the cutting blade.
WARNING
To prevent serious personal injury, remove the battery
pack before servicing, cleaning, or removing material
from the unit.
BLADE CARE
■ Lubricate the cutting blades after each use.
■ Periodically inspect the blades for damage and wear.
■ Always use the manufacturer's specifi ed replacement
blades.
TO LUBRICATE BLADE
■ Remove battery pack from hedge trimmer.
■ For easier operation and longer blade life, lubricate the
hedge trimmer blade before and after each use. Before
lubricating, remove the battery pack and lay hedge trimmer
on a fl at surface. Apply light weight machine oil along the
edge of the top blade. See Figure 8.
■ Occasionally, you should oil your hedge trimmer during
use. Before oiling, stop hedge trimmer, remove battery
pack, then oil. You then can resume trimming. Do not oil
while hedge trimmer is running.
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