MacDon CA20 Operators Manual - Manual (Page 89)

MAINTENANCE/SERVICE
Form 169009 87 Model Year - 2009
8.10.3 AUGER DRIVE CHAIN
REPLACEMENT
The chain tensioner can only take up slack for a
single pitch. When the chain has worn or
stretched beyond the limits of the tensioner, the
chain should be replaced, or removed to
replace the connector link with an offset (1/2)
link.
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.
a. Detach combine from adapter. Refer to Section
5, Adapter Attachment/Detachment On
Combine.
b. Loosen nut (A) and remove clip (B) and cover
(C).
c. Remove chain as follows:
1. Loosen idler sprocket bolt (D) and raise to
uppermost position to release tension on
chain. Snug up bolt (D) to hold sprocket.
2. Remove nut (E) and bolts (F) and remove
cover (G).
3. Rotate auger to expose connector link (H).
4. Push on one leg of clip (J) to remove it from
link.
5. Remove link and remove chain.
6. Replace one link with an offset link and
reinstall, or install a new chain.
d. Install chain as follows:
1. Feed chain (K) around sprockets as shown
and position so that connection can be
made on driven sprocket (L).
2. Install connector link (H). Refer to Section
8.5, Roller Chain Installation.
e. Tighten chain. Refer to Section 8.10.3, Auger
Drive Chain Adjustment.
f. Lubricate the chain with SAE Multi-Purpose
High Temp. Extreme Pressure (EP2)
Performance With 1% Max Molybdenum
Disulphide (NLGI Grade 2).
(continued next page)
H
J
E
G
F
D A
B
C
L
CUTAWAY VIEW OF CHAIN CASE
K
J
H