
OPERATION
SICKLE SECTIONS TO PROTRUDE
1/32
to
1/16
BEYOND GUARD
SICKLE CLEARANCE (FIG. 21 )
SICKLE ASSEMBLY REMOVAL
When it becomes necessary to remove the sickle for
sharpening, section replacement or complete sickle
replacement, remove the bolts holding the sickle head
to bar and slide sickle out of guard assembly.
If the sickle fits too loosely, in most cases proper
clearance can be obtained by tapping down or prying
up the front end of the hold down clips (F).
Remove the sickle assembly.Reinsert sickle and
adjuSt each hold down clip as it is reached by the
sickle, so when sickle is fully inserted all hold down
clips will have been adjusted.
The proper clearance to be maintained should not
exceed
1132".
Fitting these clips too tightly will
cause binding or scoring, excessive vibration and
chatter. Lubricate freely.
A.Check sharpness of sickle sections.
1. If sharpening is necessary, a sickle grinder with
a holder should.beused for this operation to main-
tain correct grinding angle.(Same as original).
Sickle knives can be resharpened by your local
Sears Service Store.
2. Replacedamaged sickle sections.
B. Check fit of sickle sections to guards and wear
plates. If thesickle sections are sharp, cle"n
cutting is entirely dependent upon the follow-
ing;
1.Alignment of guard surfaces.
2. Wear plate adjustment.
3. Straightness ofcutter bar.
4. Pitch of guards.
5. Hold down clip clearance.
6. Proper leadsettinq of mower.
7. Improper speeds of sickle in relation to
forward travel oftractor.
Be sure the sickle sections are sharp at alltimes and
held close to the guards by the sickle clips.Be care-
ful, however, of having them too tightas thiswill cause
binding. Always lubricate well with oil at the point on
the bar and guard assembly where the clipscontact
the sickle assembly.
Check the position of the forward ends of the sickle sec-
tions (B) to make sure that they protrudepast the for-
ward ends of the guards (E) FIG. 21 Forcutting loose
precut hay, dense, fine and loose under growths, etc.;
without clogging, the sickle must contact the material
ahead of any guard.1/32" to 1/16" protrusion of the
sickle beyond the guard is sufficient. If your "wear
plates" (A)
FIG.,21
are worn half-waythrough on the
front edge, moving the wear plate forward will place
the sickle in the proper position.If the wear plate is
worn too much formaking the proper adjustment,they
should be replaced.
Remove the sickle assembly and check all guards for
alignmentof surfaces. The alignment may be checked
by using a straight edge ordrawing a string tightly
across these surfaces.Any guard being too high will
create excessive clearance between the guard and the
sickle sections. Misalignment can becorrected by
bending guards up or down,as required.Hammer
only on solid portion ofguard beyond thelip.
The wear plates (A) support.theback of the sickle
.sections (B) and guide the sickle barin the guard re-
cess.Wear plates have elongated holes for adjust-
ment against the sickle bar (C) to preventitfrom
drifting forward and backward.Adjust by loosening
the guard bolts (D) and sliding the wear plate forward
against the sickle bar. Avoid a tight fit.Check the
top surface of the wear .plate with the guard surface
(E).These two surfaces must be even.