MacDon A40-D Pull-Type - Manual (Page 137)

SECTION 7 MAINTENANCE AND SERVICING
169000
135
Revision F
7.8.12 Knife Drive Box
7.8.12.1 Mounting Bolts
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.
Check torque of four knife drive box mounting
bolts (A) after the first 10 hours operation, and
every 100 hours thereafter. Torque bolts to
200 ft·lbf (270 N·m). When tightening, start with
the side mounting bolts.
7.8.12.2 Removing Knife Drive Box
a. Loosen knife drive belt (B), and slip off knife
drive box pulley. Refer to one of the following
sections, depending on your equipment:
• Section 7.8.9.1 Adjusting Tension: LH Knife
Drive Timing Belt – A30-D
• Section 7.8.9.4 Adjusting Tension: RH Knife
Drive Timing Belt – A30-D
• Section 7.8.10.1 Adjusting Tension: LH
Knife Drive Belts – A40-D
• Section 7.8.10.4 Adjusting Tension: RH
Knife Drive Belt – A40-D
b. Stroke knife to its outer limit.
c. Clean area around knife head.
d. Remove grease zerk (D) from knife head
pin (E).
e. Remove nut and bolt (C).
f. Insert screwdriver in groove of pin (E), and pry
up on pin to free knife. Pin does NOT have to be
removed from arm.
g. Remove bolt (F) from pitman arm.
h. Remove pitman arm (G) from knife drive box
output shaft.
i. Remove bolts (A) attaching knife drive box
to frame.
j. Remove knife drive box.
G
F
D
E
C
A
A
A
B