MacDon PW7 Pick-Up Header User Manual
Page 72
SECTION 7 – SERVICE
Form 169149
Revision E
66
e) Place the longer shaft of the gearbox through
the drive end rotor and attach the special
gearbox puller to the shaft.
NOTE:
DO NOT pull the shaft through
completely or the follower arm will not be
able to be installed. Follow step (f).
Attempting to drive the gearbox out for arm
installation may result in gearbox damage.
f) Pull the shaft approximately 1 inch in.
Remove the puller.
g) Install the follower arm and key onto the
shaft of the small gearbox. Orient the
follower arm offset toward the scroll plate.
h) Apply permanent thread locking compound
and tighten the 7/8-inch jam nut. The 7/8-
inch jam nut will pull the gearbox into its
permanent position.
i) Install and tighten the 3/8-inch x 1 1/2 inch
bolt, and lock nut on the follower arm.
j) Rotate the drive end rotor until the follower
arm on the new gearbox is centered in the
small hole in the scroll plate.
k) Install the flat washer, two bearings, shoulder
bolt, spring lock washer and nut to the
follower arm. See drawing for proper
orientation.
l) Install the scroll plate plug.
m) Install the finger bar and apply permanent
thread locking compound to the 5/16-inch x
1-inch bolts that are used to secure the finger
bar to the finger bar idler arm. Snug the bolts
to the finger bar arms.
n) Rotate by hand the drive end rotor one
complete revolution. This is to ensure that
the finger bars are seated properly.
o) Tighten the four remaining finger arm
bolts.
p) Install the scroll plate guard.
q) Install the drive belt.
r) Install the drive belt guard.
s) Check gearbox lubrication level. Add
NLGI Grade 000 extreme pressure,
semi-fluid lithium grease, such as
Mobilux EP 023, Petro-Can Precision
XL EP000, or Chevron Dura-Lith EP000
as required.
Follow steps (g-o) in removal procedure and
(a-p) in installation procedure for each
gearbox to be replaced.
NOTE: Occasionally during installation
of the gearboxes, the gears may bind.
However, after the 7/8-inch jam nuts have
been tightened, the gearbox will operate
correctly.
Special Tool Gearbox Puller - Part # 180784
Puller on Gearbox
P00081
P00082