MacDon 963 Harvest Header - Manual (Page 47)

46
MAINTENANCE/SERVICE
SICKLE AND SICKLE DRIVE (continued)
NOTE: The sickle drive assembly at the left end of the
header varies depending on the application (windrower
or combine). For instructions to convert from one drive
configuration to the other, see Assembly section at the
back of this book.
Sickle Drive Belt Tension
Check sickle drive belt tension after the first 5 hours
operation and every 100 hours thereafter.
IMPORTANT: To prolong belt and drive life, do not
over-tighten belt. Operate at minimum tension required
to prevent slipping or excessive belt whip. When
installing a new belt, never pry belt over pulley. Loosen
adjusting device sufficiently to allow easy installation.
To adjust:
1. Loosen nut (A).
2. Turn nut (B) to move idler pulley up or down
(depending on drive configuration) to tighten belt
until a force of 18 lbs. (80 N) deflects belt 3/4 inch
(20 mm) at mid-span.
3. Tighten nut (A).
NOTE: To remove belt, back off idler pulley and
remove bolt-on panel in left end sheet at wobble box.
Turn belt on edge and work it up and over pulley hub
as shown.
Wobble Box Mounting Bolts
Tighten the four wobble box mounting bolts (C) after
the first 10 hours operation and every 100 hours
thereafter. Torque to 200 ft.lbs. (270 N ⋅ m), starting with
the side mounting bolts.
Wobble Box Lubricant
Check wobble box lubricant level before first operation
and every 100 hours thereafter.
To check:
1. Raise header to a point where the wobble box base
is approximately level.
2. Remove breather/dipstick (D). Oil level must be
between end of dipstick and bottom hole (or
groove) in dipstick.
3. Add as required.
Change wobble box lubricant after first 50 hours
operation and every 1000 hours or 3 years thereafter.
To drain wobble box, raise header fully and engage
header lift cylinder stops. Remove breather/dipstick
(D) and drain plug (E).
Use SAE 85W-140 gear lubricant (API Service
Classification GL-5). Capacity of box is 2.2 litres (2.3
U.S. quarts)
REMOVING SICKLE DRIVE BELT
WOBBLE BOX
D
C
E
SICKLE DRIVE BELT TENSION - SHOWN IN
COMBINE CONFIGURATION
A
B