MJIINTENANCE/SERVICE
SICKLE
AND
SICKLE
DRIVE
(continued)
Guards
Check daily that guards
are
aligned
to
obtain
proper shear cut
between
si
ck
le
s~ction
and
guard. Sickle sections
should
contact shear
surface
of
each guard.
Align
guards with
guard
straightening tool
provided
as
shown:
To
bend
guard
tips
up,
position
tool
as
shown
at
(A) and pull
up.
To
bend
tips
down,
position
tool
as
at (8)
and
push down.
NOTE: Tool is stored
in
tool
box
at
ri
!~ht
end
of
main
frame
.
TIP:
If
trouble is encountered cutting tangled, but
easy to cut material (canala, peas, grain) replace
guards with
st
ub guards and install a sickle hold·
down
on
every guard.
If
materi
al
is tough to cut,
install stub guards wi
th
top
guard and adjuster
plate
from the
MaeDon
930
"Grass
Seed
Special" Header. A stub guard kit for t
he
5000
Windrower is available from your
deall~r
.
Excessive
Breakage
BENDING GUARD TIPS UP
BENDING GUARD
TIP
S DOWN
Excessive breakage
of
sickle sections and guards can be controlled
by
seve
ra
l factors. See "Cutting
Height",
"Cutterbar Angle" and "HeadE!r Flotation" in Operation section for recommendations.
Sickle
Hold-Downs
Check daily that sickle hold·downs
,3re
set to
prevent
sickle sections from lifting off
!~uards
but
still permit sickle to slide without binding. Set
hold-downs after guards are aligned.
To set hold-downs:
1. Using a flat piece
of
bar (Al, tap end
of
hold-
down as shown. This allows adjustment
of
hold-down arch
(8)
without "pinching" sickle.
Clearance from
hold·down to
sic~:le
section
should be .020 inch (0.5 mm).
2. After adjusting
all hold-downs, run header at
a
low engi
ne
speed and listen for noise due
to insufficient clearance. Re-adjust as
necessary by placing a
.020 inch (0.5 mm)
shim between hold-down and
sec;tion, then
st
riking the hold-down arch
(EI)
with a
hammer.
SETTING SICKLE
HOLD-DOWNS
49
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