MacDon A40-D Pull-Type - Manual (Page 124)

SECTION 7 MAINTENANCE AND SERVICING
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122
Revision F
7.8.8 Knife Hold-Downs
Check daily that knife hold-downs are set to
prevent knife sections from lifting off guards, but
still permit knife to slide without binding.
NOTE
Guards should be aligned prior to
adjusting hold-downs.
CAUTION
Stop engine, and remove key from ignition
before leaving Operator’s seat for any
reason. A child or even a pet could engage
an idling machine.
7.8.8.1 Adjusting Knife Hold-Down:
Pointed Guards
a. Torque nuts (C) to 35 ft·lbf (46 N·m).
b. Turn adjuster bolts (D). Using feeler gauge,
clearance from hold-down to knife 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.
c. Torque nuts (C) to 53 ft·lbf (72 N·m).
d. 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 knife
and guards.
0.004 – 0.016 in.
(0.1 – 0.4 mm)
0.004 – 0.040 in.
(0.1 – 1.0 mm)
C
D