Partner B 320 B Instruction Manual page 8

NOTE:
Remove the trimmer head and plastic
shield before attaching the metal shield and
installing the weed blade. To remove the trimmer
head, align hole in the dust cup with the hole in
the side of the gearbox by rotating the dust cup.
Insert a small screwdriver into aligned holes.
This will keep the shaft from turning while loos-
ening the trimmer head. Remove the trimmer
head by turning clockwise. Remove the screw-
driver. To remove the plastic shield, loosen and
remove nut. Pivot shield to release bracket from
slot. See INSTALLATION OF THE CUTTING
HEAD and ATTACHING THE PLASTIC
SHIELD for illustrations. Be sure to store all
parts and instructions for future use. Never use
the trimmer head with the metal blade installed.
ATTACHING THE METAL SHIELD
WARNING:
The metal shield must be
properly installed on the tool anytime the tool is
used with a blade. Failure to install the shield in
the position shown can result in serious injury to
the operator. The length of the shield must be
aligned with the length of the shaft.
1. Place the metal shield under the gearbox,
and align the screw holes.
Shield
2. Insert and thread the 4 mounting screws
through the holes of the gearbox and the
metal shield. Tighten evenly and securely
with the hex wrench provided.
INSTALLATION OF THE METAL
BLADE
WARNING:
Wear protective gloves
when handling or performing maintenance on
the blade to avoid injury. The blade is sharp and
can cut you even when it is not moving.
WARNING:
Do not use any blades, or
fastening hardware other than the washers and
nuts shown in the following illustrations. These
parts must be provided by Partner and installed
as shown below. Failure to use proper parts can
cause the blade to fly off and seriously hurt you
or others.
NOTE:
The dust cup and retaining washer are
located on the gearbox shaft and not in the parts
bag. All other fasteners mentioned in the follow-
ing assembly steps are in the parts bag.
1. Remove the retaining washer from the
threaded shaft of the gearbox. Leave the
dust cup on the shaft.
2. Install the blade and the retaining washer
over the threaded shaft.
3. Make sure the raised part of the retaining
washer is facing the gearbox and the raised
area fits into the hole in the center of the
blade.
4. Slide the blade and retaining washer onto
the shaft of the gearbox.
5. Place the cupped washer onto the shaft.
Make sure the cupped side of the washer
is toward the blade.
6. Install the blade nut by threading onto the
shaft counterclockwise.
Shield
Retaining
Gearbox
Washer
Cupped
Washer
NOTE:
lustrated, and the blade is sandwiched between
the dust cup and the retaining washer. There
should be no space between the blade and the
dust cup or the retaining washer.
7. Align hole in dust cup with hole in side of
gearbox by rotating the blade.
8. Insert a small screwdriver into aligned
holes. This will keep the shaft from turning
while tightening the blade nut.
Screwdriver
9. Tighten blade nut firmly with a wrench while
holding screwdriver in position.
10. Remove the screwdriver.
11. Turn blade by hand. If the blade binds
against the shield, or appears to be uneven,
the blade is not centered, and you must re-
install.
NOTE:
into aligned holes. Unthread the nut and remove
parts. Be sure to store parts and instructions for
future use.
8
Gearbox
Dust Cup
Threaded Shaft
Nut
Make sure all parts are in place as il-
To remove blade, insert screwdriver
Blade