MacDon PW7 Pick-Up Header - Manual (Page 78)

SECTION 7 – SERVICE
Form 169149 Revision E 72
Use the following procedure to remove and
replace finger bar arms and elbows:
a) Raise the hold down up and engage the hold
down locks.
b) Lower header/pickup completely to ground,
shut of combine, and remove key.
c) For drive side finger bar arm removal and
installation refer to Replacing Small Gear
Box (p &q).
d) To remove idler arm, remove the 3/8 UNC x
3/4 bolts, flat washers, and M10 spring lock
washers securing the idler arm to the elbow
and the 3/8 UNC x 3/4 bolt and washer
securing the elbow to the idler rotor, turn
bolts out several turns.
e) Remove the 5/16-inch x 1-inch bolts, flat
washers, and M8 spring lock washers.
f) Insert the 3/8 UNC x 3/4 bolt without washer
onto the elbow from inner side of the idler
rotor. Turn in several turns. Strike the bolt
head with the hammer to drive elbow and
idler arm out of the idler rotor.
g) Inspect elbow bearing for free and smooth
rotation. Inspect bearing seal for damage.
h) To remove bearings heat the idler rotor-
bearing socket until a yellow flame appears.
Drive the bearing out.
i) Insert the 3/8 UNC x 3/4 bolt without
washers onto the elbow on the idler arm side.
Turn in several turns. Strike the bolt head
with the hammer to drive the elbow out of
the idler arm. Inspect the bearings for free
and smooth rotation. Inspect bearings for any
signs of damage. Remove all foreign
materials and degrease outer bearing rings
and inside idler rotor bearings.
Installation Procedure
a) Apply a thin coat of permanent thread
locking compound to the outer bearing
ring. Press the bearing into the idler rotor
nest. Repeat procedure for the second
bearing. Install the dust cup and elbow.
Secure with 3/8 UNC x 3/4 bolt (Use
temporary thread locking compound).
Check elbow for free and smooth
rotation.
b) Clean the idler arm-bearing socket of
foreign materials and grease. Press
bearings into idler arm bearing socket.
c) Install idler arm and secure with 3/8 UNC
x 3/4-inch bolt, washer and M10 spring
lock washer (Use temporary thread
locking compound). Check arm for free
and smooth rotation
d) Reinstall the finger bar. For finger bar
installation procedure, see Crown and
Pinion Gear Installation Procedure.
7.14
EXTREMITY LIGHT BULB
REPLACEMENT
DANGER : Lower header to
the ground or engage feeder
house locks, shut-off combine,
remove ignition key, and wait for parts to
stop moving before performing any
service procedure.
The extremity lights are an important safety
feature and should be maintained properly.
When a bulb burns out it should be replaced
immediately. The following procedure will
describe the proper replacement procedure:
Replacement Bulb
12V-21W SINGLE FILAMENT