Operator`s manual

11
Every 50 hours of operation
(more frequently in dusty or dirty
conditions):
Lubricate the gearcase ■ . To per-
form this operation, rst remove the
gearcase (A) from the outer tube (B).
CAUTION!
Do not remove the D-shaped shim
washer from the gearcase clamp!
The shim washer prevents damage
from overtightening the gearcase
clamp screw.
E
1. Loosen the gearcase clamp screw
(C).
2. Remove the index screw (D) from
the gearcase.
3.
Slide the gearcase out of the tube.
Using a grease gun, pump lithium-
base grease (about 10 grams) into
the grease tting (E) on the gearcase
until you see old grease being
purged from the gearcase. Purged
grease will be visible in the outer
tube cavity.
4. Clean up the excess grease, then
reassemble the gearcase onto the
outer tube. Make sure the index
screw ts into the hole on the outer
tube. Securely tighten both screws.
50-Hour Maintenance
B
A
C
D
WARNING!
The cutter blades are very sharp!
Always wear gloves when working
around the cutter assembly.
CAUTION!
Operating the trimmer with worn
or improperly adjusted cutters will
reduce cutter performance and may
also damage your machine.
Cutter performance of your machine
depends in great measure on the
cutter blade clearance. Properly ad-
justed blades will oscillate freely yet
help prevent binding of cut material
between blades. Adjust the blades
as follows:
B
Cutter Blade Adjustment
1. Loosen all the blade locknuts (A) at
least one full turn.
2. Tighten each blade shoulder bolt (B)
rmly, and then loosen the shoulder
bolts 1/4 to 1/2 turn.
3. Working from the gearcase end, lock
each bolt in place by rmly tighten-
ing its locknut while preventing the
shoulder bolt from turning.
When shoulder bolt adjustment is cor-
rect, there should be a gap of 0.25–0.50
mm between the cutter blades and the
at washers (C) beneath each bolt head
should turn freely.
A
C