MacDon 5020 Mower Conditioner - Manual (Page 58)

58
MAINTENANCE/SERVICE
ROLLS AND ROLL DRIVE (continued)
Roll Drive Chain Removal
1. Raise header. Stop engine, remove key and
engage lift cylinder stops.
2. Remove bolts securing upper cover (A) to
chain case. Loosen clamp bolt (B) and slide the
cover down the drive shaft shield.
3. Remove bolts securing lower cover (C) and
remove cover.
4. Loosen two bolts (D) and nut (L) at chain
tensioner.
5. Rotate tensioner cam counter-clockwise, using
a 15/16 wrench on welded nut (E).
6. Remove the chain tensioner sprocket from
inside chain case.
NOTE: Be careful not to lose the three washers
between the sprocket and inner cam disc.
7. Rotate upper or lower roll universal joint to
position chain connector link (F) as shown.
8. Remove connector link (F).
9. Turn lower roll u-joint to rotate lower sprocket
(G) counter-clockwise until chain is free of the
lower sprocket.
10. Lift excess chain up and bring it out of the
chain case through the top opening.
11. Turn sickle drive pulley at left end of header to
rotate driver sprocket (H) clockwise until chain
is free of driver sprocket.
REMOVE COVERS
A
C
B
REMOVE CHAIN
RELEASE CHAIN TENSION
D
D
E
L