MacDon 742 HAY CONDITIONER - Manual (Page 63)

Form # 46290 Issue 09/05 61
MAINTENANCE/SERVICE
SICKLE AND SICKLE DRIVE (continued)
Sickle Head Needle Bearing Installation
Using a flat-ended tool (A) with approximately the
same diameter as the bearing, push the bearing
into the sickle head until the top of the bearing is
flush with the step (B) in sickle head.
IMPORTANT: O-ring and plug must be in place in
sickle head before installing bearing. Assemble the
bearing with the stamped end (the end with
identification markings) against the tool.
Install seal (C) in top of sickle head with lip facing
outwards.
IMPORTANT: To avoid premature sickle head or
wobble box failure, be sure there is no looseness
in:
a) Fit of sickle head pin and needle bearing.
b) Fit of sickle head pin and pitman arm.
To Install Sickle
WARNING: Always stand to rear and
grasp rear edge of sickle during
installation to reduce risk of injury
from cutting edges. Wear heavy
gloves when handling sickle.
IMPORTANT: Always align guards and re-set
sickle hold-downs while replacing sickle. See
"Guards" and "Sickle Hold-Downs" in this section.
1. Slide sickle into place and replace bolt (D).
NOTE: When installing sickle head pin (E),
bottom out the pin in sickle head, then hammer
sickle head back up to pitman arm.
2. Tighten bolt (D) to 160 ft.lbs. (220 N
⋅m).
NOTE: To prevent wobble box failure: In wet
conditions a build-up of mud may occur on inboard
side of sickle head, causing plugging. In these
conditions, remove skid shoe (F).
INSTALLING SICKLE
D
F
NEEDLE BEARING INSTALLATION
A
B
C
E
D
INSTALLING SICKLE – FRONT VIEW
bottom out pin
in head