Haban 402-E - Page 8

sickle Knife
Ad 1 u St menf
I_.j
Check the }K>silion of the forward emis of the
live knife Hcotions (Ji) to make sure that they
protrude past the forwaixl eiuls of Iho shear
finger plates (K). For cutting loose precut
hay. dense, fine and loose under growths, etc.,
without clogging, the live moving knives must
contact the material ahead of any stationary
shear-plate. 1/32" to 1/16*'protrusion of the
knife is sufficient. If your "wear-plates" (A)
are worn half way thru on the front edge,
moving the wear plate forwanl will place the
sickle in the proper position. If the wear
plate Is worn too much for making the proper
adjustment they shouhl lx> roplaood.
KNIFE ASSEMBLY HKMOVAL
When it becomes necessary to remove the
knife for sharpening, section replacement or
complete knife replacement, remove the Iwlls
holding the knife head to bar and slide knife
out of guard assembly.
ALIGNMENT OF LEIX}Ed PLATE SUUFACES
Remove the knife assembly and check all shear
fingers for alignment of surfaces. TTie align¬
ment may be checked by using a straight edge
or drawing a string tightly across these sur¬
faces. Any shear finger being too high will
create excess clearance between the shear
finger and the knife sections. Misalignment
can be corrected by bending shear fingers up
or down, as required. Hammer only on solid
portion of guard beyond the lip.
WEAK PLATE ADJUSTMENT (Fig. 10)
The wear plates (A) support the back of the
knife sections (B) and guide the knife bar in
the shear finger recess. Wear plates have
elongated holes for adjustment against the
knife bar (C) to prevent it from drifting for¬
ward and backward. Adjust by loosening the
guard bolts (D) and sliding the wear plate
forward against the knife bar. Avoid a tight
fit. Check the top surface of the wear plate
with the shear finger surface (E). These two
surfaces must be even. Alowwearplatc should
be shimmed.
8
KNIFE CLEAKANrEC (Fig. 10)
If the knife fits too loosely, in mo.st cases
clearancecan be obtained by hammering down
or prying up the front end of the hold down
clips (F>. The suggested method is to remove
the knife assembly. Reinsert the knife and
adjust each clip as it is reached, for the en¬
tire length of the bar. Bend each clip up or
down as required. The approximate clear¬
ance to be maintained should not exceed t/32".
Fitting these clips too tightly will cause bind¬
ing or scoring, excessive vibration and chatter.
I.ubricate freely.
CUTTING FAILURE
A. Check sharpness of knife section.s
1. If sharpening Is necessary a sickle
grinder with a holder should be used
for this operation to maintain correct
grinding angle. (Same us original)
2. Replace damage<i sections.
B. Check fit of knife soctlon.s to shear fingers
and wear plates. If the knife sections are
sharp, clean cutting is entirely dependent
upon the following:
1. Alignment of shear finger surfaces.
2. Wear plate adjustment.
3. Straightness of knife bar.
4. Pitch of shear fingers.
5. Hold down clip cleai'ance.
6. ProjKjr load setting of mower.
7. Improper speed of sickle knife In re¬
lation to forward travel of tractor.
Be sure the sickle sections are sharp at all
times and held close to the shear fingers by
the sickle slips. Be careful, however, of
having them too tight as this will cause bind¬
ing. Always lubricate well with oil at the point
on the bar and shear finger assembly whore
the clips contact the knife assembly.
Form 8512 (^1/721