MacDon FD70 for Combine Operators - Manual (Page 202)

SECTION 10. MAINTENANCE AND SERVICING
Form 169006
200
Revision D
10.14.7 Reel Drive Sprocket: D60, FD70
CAUTION
To avoid bodily injury from fall of raised reel,
always engage reel props before going under
raised reel for any reason.
10.14.7.1 Removal: Drive Sprocket
a. Remove reel drive cover(s). Refer to Section
10.14.5 Reel Drive Chain: D60, FD70.
b. Loosen six bolts (A) on motor mount.
c. Slide motor (B) and motor mount (C) downward
until chain (D) is loose.
d. Slip chain off drive sprocket (E).
e. Remove cotter pin (F) and slotted nut (G).
f. Remove sprocket (E).
IMPORTANT
Do not use pry bar and/or hammer to
remove sprocket. This will damage the
motor. Use a puller if sprocket does not
come off by hand.
10.14.7.2 Installation: Drive Sprocket
Refer to illustrations opposite.
a. Align keyway in sprocket (E) with key in shaft,
and slide new sprocket onto shaft.
b. Install slotted nut (G), and torque to 10 - 20 in·lbf
(1.1 - 2.2 N·m).
c. Install cotter pin (F). Tighten nut to next slot if
required.
d. Slip chain (D) over drive sprocket, and tighten
chain.
e. Slide motor (B) and motor mount (C) until the
required tension is achieved. Tension on chain
(D) should be such that hand force deflects chain
1/8 inch (3 mm) at mid-span.
f. Tighten bolts (A) to 75 ft·lbf (102 N·m).
g. Re-install drive cover(s). Refer to Section
10.14.5 Reel Drive Chain: D60, FD70.
G
F
E
SINGLE REEL SHOWN - DOUBLE REEL SIMILAR
D
A
A
B
C