MacDon CA25 OM - Manual (Page 168)

SECTION 8. MAINTENANCE AND SERVICING
169593
166
Revision B
8.12.5.2 Sprocket Replacement: Single Reel
Standard Torque Drive
a. Lower header and reel, shut down combine,
and remove key from ignition.
b. Remove four screws (A), and remove reel drive
cover (B)
c. Loosen bolts (C).
d. Slide motor (D) and motor mount (E) down
towards reel shaft.
e. Remove bolt (F), lock washer, and flat washer
(G).
f. Remove speed sensor disc (H) (if installed).
g. Slip chain (J) off drive sprocket.
h. Remove sprocket (K) from shaft.
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.
i. Align keyway (L) in new sprocket with key (M)
in shaft, and slide new sprocket onto shaft.
j. Install speed sensor disc (H) (if applicable) onto
shaft, and secure with flat washer (G),
lockwasher, and bolt (F).
k. Torque bolt to 18 lbf·ft (24 N·m).
l. Position chain (J) around sprockets.
m. Slide motor (D) and motor mount (E) upward
until tension on chain (D) is such that hand
force deflects the chain 1/8 inch (3 mm) at
mid-span.
n. Tighten nuts (C), and re-check tension.
o. Re-install drive cover.
A
B
C
C
M
L
J
D
E
H
F
G
K