MacDon PW7 Pick-Up Header - Manual (Page 57)

SECTION 7 – SERVICE
Form 169149 Revision E 51
coupler should come free. Use a
rubber mallet if necessary. Do not
lose the key.
II) 7/16” Wrench or Socket (slower)
1. Using a 7/16” wrench, remove the
1/4” bolts and thread them into the
second set of holes in the hub until
they contact the sheave.
2. Turn each bolt a half turn at a time
until the hub releases.
3. Taking hold of the sheave, give a
sharp pull. The motor sheave and
coupler should come free. Use a
rubber mallet if necessary. Do not
lose the key.
f) Flip the motor up on end with sheave
upward.
g) With rubber mallet, gently tap alternate
sides of the sheave until it break free.
h) Place a chisel in the slot of the coupler and
slightly spread it open.
i) Pull the motor off of the coupler. Do not
lose the key.
j) Remove the torque arm and hose fittings if
replacing the motor.
Installation:
a) Place the torque arm onto the motor and
secure.
b) Place the key in the slot of the roller shaft.
c) Slide the hub onto the shaft-shouldered
end first.
d) Position the motor coupler onto the shaft
while aligning the key with the slot. Tap
on until it bottoms out.
e) Loosely place the sheave onto the coupler.
f) Slide the motor and torque arm into the
coupler until it hits the roller shaft. Be sure
the key and key way is aligned.
g) With a rubber mallet tap the sheave onto the
coupler until it is firmly seated.
h) Place the 1/4” bolts into the non-threaded
holes and align with the threaded holes on
the sheave. Tighten until snug.
i) Using a 7/16” wrench or socket, alternate
tightening the bolts a bit at a time until a
maximum torque of 9lb ft (11Nm) is
achieved.
j) Rotate torque arm to align with arm
extension shaft. Install arm extension,
retaining washer, bolt and hardware.
k) If installing new motor, install hose fittings
from previous motor.
l) Install the v-belt onto the sheave and activate
belt tensioner.
m) Install hoses onto the motor and secure.
n) Install shield.
Hydraulic Motor Installed
P00690