MacDon 5020 Mower Conditioner - Manual (Page 50)

50
MAINTENANCE/SERVICE
SICKLE AND SICKLE DRIVE (continued)
Sickle Drive Belt Tension
IMPORTANT: To prolong belt and drive life, do not
over-tighten belt.
To adjust:
1. Loosen nut (A) securing idler pulley.
2. Using a punch or screwdriver in pry holes (B),
raise idler until a force of 12 lbs. (55 N) deflects
belt 1/2 inch (13 mm) at mid-span.
3. Tighten nut (A).
4. Re-adjust tension of a new belt after a short
run-in period, (about 5 hours).
Sickle Drive Belt Replacement
To remove belt:
1. Loosen chain idler sprocket (C) and remove
chain from drive sprocket behind pulley (D).
2. Loosen and remove auger drive belt as follows:
•
Loosen nuts (E).
•
Back off nut (F) and back bolt out of adjuster
bracket until belt can be removed. (Access bolt
head under end panel.)
3. Loosen sickle drive belt idler pulley (A).
4. Remove belt from sickle drive pulley.
5. Remove bolt-in plate in left end sheet at wobble
box (G), and route belt through this hole.
When installing new belt, never
pry belt over pulley. Be sure
idler is fully loosened, then
tension belt as above.
SICKLE DRIVE BELT TENSION ADJUST.
A
B
A
C
G
D
SICKLE DRIVE BELT REMOVAL
E
F