MacDon FD70 for Combine Operators - Manual (Page 203)

SECTION 10. MAINTENANCE AND SERVICING
Form 169006
201
Revision D
10.14.8 Reel Drive Sprocket: D50
CAUTION
To avoid bodily injury from fall of raised reel,
always engage reel props before going under
raised reel for any reason.
10.14.8.1 Removal: Drive Sprocket
a. Lower header, raise reel and engage reel props.
b. Remove six screws (A), and remove cover (B).
c. Loosen drive chain (C) by loosening bolts (D),
and sliding motor and motor mount (E) down
towards reel shaft.
d. Slip chain (C) off drive sprocket (F).
e. Remove bolt (G), lock-washer, and flat washer.
f. Remove sprocket (F).
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.
10.14.8.2 Installation: Drive Sprocket
Refer to illustrations above and opposite.
a. Align keyway in sprocket with key in shaft, and
slide new sprocket onto shaft as shown.
b. Install bolt (G), flat washer, and lock-washer.
Torque to 18 ft·lbf (24 N·m).
c. Slip chain (C) over drive sprocket, and tighten
chain.
d. Slide motor and motor mount (E) until required
tension is achieved. Tension on chain (C) should
be such that hand force deflects chain 1/8 inch
(3 mm) at mid-span.
e. Tighten bolts (D) to 75 ft·lbf (102 N·m).
f. Re-install drive cover.
A
B
G
C
F
C
D
D
E