MacDon 922 - Manual (Page 54)

Form # 46620 Issue 01/06 52
REEL DRIVE - 912 HEADER
L
N
M
K
MAINTENANCE/SERVICE
REEL AND REEL DRIVE (continued)
Replacing reel fingers - 922 & 933 Headers: Depending on location of fingers to be replaced, follow
instructions below.
LEFT SPAN:
• Remove bat mounting bolts (A) and reel arm
mounting bolts (B) at reel arm #1.
• Remove reel arm #1 complete with bearing.
• Replace fingers and reassemble.
CENTER SPAN:
• Remove bat mounting bolts (A) and reel arm
mounting bolts (B) at reel arm #1.
• Remove bolts (C) connecting left hand and
center finger bar sections.
• Remove complete left-hand finger bar assembly
(including reel arm #1).
• Remove bat mounting bolts (A) and reel arm
mounting bolts (B) at reel arm #2.
• Remove reel arm #2 complete with bearing.
• Replace fingers and reassemble.
RIGHT SPAN:
• Remove cam follower bearing bolt (D). (For
access to bolt, remove cover over hole in cam,
align bearing with hole.)
• Remove bat mounting bolts (A) and reel arm
mounting bolts (B) at reel arm #4.
• Remove reel arm mounting bolts (B) at arm #3.
• Remove bolts (E) and (G) connecting cam arm
to finger bar.
• Remove cam arm assembly (F), complete with
reel arm #4.
• Replace fingers and reassemble.
IMPORTANT: When replacing bearing bolt (D),
install distorted thread end of nut towards bolt
head. Tighten to 125 ft.lbs. (170 N ⋅m). Replace
cover on cam.
IMPORTANT: When replacing hardware (C) and
(E), ensure tapered end of locknut seats in
countersunk hole in tube. Tighten 5/16" bolt at (C),
(E) and (G) to 35 ft.lbs. (47 N
⋅m).
Reel Speed - 912 Header
The reel drive is factory assembled for reel speed
of 71 rpm. Reel speed may be increased to 80 rpm
by changing pulley (K). The alternate pulley is
available from your dealer.
NOTE: Reel speed may also be slowed to 63 rpm
by changing the auger drive pulley at the left end
of the header. This will also slow auger speed. See
"Auger Speed - 912 Header" in this section for
details.
Reel Drive Belt Tension - 912 Header
To adjust reel drive belt tension:
1. Back nut (L) away from nut (M).
2. Turn nut (M) to compress spring until dimension
(N) is 4-3/8 inches (110 mm), measured from
bottom of frame bracket to bottom of spring.
3. Tighten nut (L) against nut (M) to secure the
position.