MacDon FD70 for Combine Operators - Manual (Page 171)

SECTION 10. MAINTENANCE AND SERVICING
Form 169006
169
Revision D
10.11.6 Sickle Guards
Check daily that guards are aligned to obtain
proper shear cut between sickle section and
guard. Sickle sections should contact shear
surface of each guard.
10.11.6.1 Guard Adjustment
To align guards, proceed as follows. The guard
straightening tool (MacDon #140135) is available
from your MacDon Dealer.
a. To adjust guard tips upward, position tool as
shown and pull up.
b. To adjust tips downward, position tool as shown
and push down.
TIP: If trouble is encountered cutting tangled, or
fine-stemmed material, replace lower guards with
stub guards, and install a sickle hold-down on
every guard.
If material is tough to cut, install stub guards with
top guard and adjuster plate. A stub guard
conversion kit is available from your MacDon
Dealer. Refer to Section 12.7 STUB GUARD
CONVERSION KIT.
10.11.6.2 Guard Replacement
CAUTION
Always engage reel props before working
under reel.
10.11.6.2.1 Pointed Guards: Single Knife
To replace pointed guards in single knife D50 and
D60 Harvest Headers and FD70 FlexDraper
headers, proceed as follows:
a. Stroke sickle so that sickle sections are spaced
midway between the guards.
b. Remove two nuts (A) and bolts that attach guard
(B) and hold-down (C) (if applicable) to cutterbar.
c. Remove guard, hold-down, and poly wear plate (if
installed).
d. Position new guard and poly wear plate (if
applicable) on cutterbar, and install carriage bolts.
IMPORTANT
The first four outboard guards on drive
side(s) of header do not have a ledger
plate. Ensure that proper replacement
is installed.
e. Install hold-down, and secure with nuts. Tighten
nuts to 50 ft·lbf (68 N·m).
f. Check and adjust clearance between hold-down
and sickle. Refer to Section 10.11.7 Sickle
Hold-Downs.
C
A
B
DOWNWARD ADJUSTMENT
UPWARD ADJUSTMENT
DRIVE SIDE NORMAL END