MacDon D60 Draper Headers - Manual (Page 101)

SECTION 8. MAINTENANCE AND SERVICING
Form 169441 99 Revision B
8.7.7 SICKLE HOLD-DOWNS
Check daily that sickle hold-downs are set to
prevent sickle sections from lifting off guards, but
still permit sickle to slide without binding.
NOTE
Guards should be aligned prior to
adjusting hold-downs.
8.7.7.1 Pointed Guards
a. To adjust the clearance between the hold-down
and sickle for typical pointed guards, proceed as
follows:
1. Using a feeler gauge, clearance from hold-
down to sickle section should be
0.004 - 0.024 in. (0.1 - 0.6 mm).
2. Turn adjuster bolts (A) as required.
NOTE
For larger adjustments, it may be
necessary to loosen nuts (B), turn
adjuster bolt (A), then re-tighten nuts
(B).
b. For center guard, proceed as follows:
1. Torque nuts (C) to 35 ft·lbf (46 N·m).
2. Using a feeler gauge, clearance from hold-
down to sickle section should be
0.004 - 0.016 in. (0.1 - 0.4 mm) at the guide
tip, and 0.004 - 0.040 in. (0.1 - 1.0 mm) at
rear of guide.
3. Turn adjuster bolts (D) as required.
4. Torque nuts (C) to 53 ft·lbf (72 N·m).
c. After adjusting all hold-downs, run header at a
low engine speed, and listen for noise due to
insufficient clearance. Insufficient clearance will
also result in overheating of the sickle and
guards. Re-adjust as necessary.
8.7.7.2 Stub Guards
a. To adjust the clearance between the hold-down
and sickle for all stub guards, proceed as follows:
1. Torque nuts (E) to 35 ft·lbf (46 N·m).
2. Using a feeler gauge, clearance from hold-
down to sickle section should be
0.004 - 0.016 in. (0.1 - 0.4 mm) at the guide
tip, and 0.004 - 0.040 in. (0.1 - 1.0 mm) at
rear of guide.
3. Turn adjuster bolts (F) as required.
4. Torque nuts (E) to 53 ft·lbf (72 N·m).
0.004 - 0.024 in
(0.1 - 0.6 mm)
A
B
0.004 - 0.016 in
(0.1 - 0.4 mm)
0.004 - 0.040 in
(0.1 - 1.0 mm)
C
D
0.004 - 0.040 in
(0.1 - 1.0 mm)
0.004 - 0.016 in
(0.1 - 0.4 mm)
F
E