MacDon 4000 Mower Conditioner - Manual (Page 53)

53
MAINTENANCE/SERVICE
REEL AND REEL DRIVE
Reel Drive Belt Tension
IMPORTANT: To prolong belt and drive life, do not
over-tighten belt. Operate at minimum tension
required to prevent slipping under normal load.
This also protects the reel from over-loading.
Recommended tension: A force of 12 lbs. (55 N)
deflects belt 1/4 inch (6 mm) at mid-span.
To adjust:
1. Loosen two bolts (A).
2. Turn adjuster nut (B) until desired tension is
reached.
3. Tighten bolts (A).
4. Re-adjust tension of a new belt after a short
run-in period (about 5 hours).
Reel Drive Belt Replacement
To remove belt:
1. Remove bolts (A) from swing arm.
2. Collapse telescoping shaft (C) to allow belt to
pass between frame and swing arm.
3. Scratch an alignment mark on pulley half (D)
and yoke plate (E) to maintain roll timing on
re-assembly.
4. Remove three bolts (F) and collapse
telescoping shaft (G) to allow belt removal.
When installing new belt, be sure to:
1. Align marks on pulley half and yoke plate.
NOTE: Spline shaft and yoke will mate in one
position only.
2. Tighten three bolts (F) to 70 ft.lbs. (95 N.m).
3. Engage lower bolt (A) in adjuster eyebolt (H)
when re-fastening swing arm.
4. Properly adjust belt tension as described.
Never pry belt over pulley.
REEL DRIVE BELT TENSION ADJUSTMENT
A
B
C
H
A
REEL DRIVE BELT REMOVAL
G
F
E
D