MacDon 9250 SP - Manual (Page 98)

Form # 46584 Issue 11/06 Web Rev_01 96
MAINTENANCE/SERVICE
Header Drive
HEADER DRIVE BELT GUIDES (continued)
To adjust:
1. Stop engine and remove key from ignition.
2. Loosen hardware securing top guide (A), belt
keeper (B) and lower guide (C).
3. Hold rear idler (D) down with 15/16 wrench to
tighten belt.
4. Adjust belt guides and keepers:
• Adjust top guide (A) to clear belt by 1/4 inch (6
mm) at front. At the back, center the belt
between top guide (A) and retainer (E). Adjust
hardware (F), both sides, to clear sides of belt.
• Adjust belt keeper (B) to clear belt by 1/8 inch
(3 mm).
• Adjust lower guide (C) to clear belt by 1/8 inch
(3 mm).
NOTE: Lower guide must remain free to pivot
on 1/2 inch bolt. Over-tightening can prevent
header from engaging.
5. Tighten hardware.
6. Adjust front pulley shield. (See below.)
HEADER DRIVE PULLEY SHIELD
The pulley shield should be adjusted so it does not
rub the belt when the drive is engaged.
To adjust:
1. Stop engine and remove key from ignition.
2. Loosen hardware (A) at shield.
3. Push up on lower strand of belt to simulate
tightened position (belt fully engaging pulley
grooves).
4. Position shield (B) to achieve a consistent 1/8"
(3 mm) clearance to belt around entire shield.
5. Tighten hardware (A).
D
C
B
A
E
F
A
C
F
E
ADJUSTING BELT GUIDES & KEEPER
A
B
ADJUSTING PULLEY SHIELD