SECTION
5:
PTO
Power
Unit
Transmission
PTO
HORSE
MODEL
TECHNICAL
MANUAL
Page
5-5
4/90
c.
Lightly
lubricate the new bear-
ings with #30
weight
oil.
5.
Insert the drive shaft
(17)
into
the front of the housing.
6.
Install the bearing
cup
(20) on
the front bearing.
7.
Place the
front
bearing cap
(14) over the bore opening and
seat it by tapping it with a mallet.
A gasket
(16)
should
not
be
on
the
bearing cap at this time.
Hold
the
bearing cap
firmly
in place with
one
hand while
you
check the
drive shaft
for
end play by pulling
and pushing the drive shaft.
Cor-
rect end play
is
between .005 and
.010
of
an
inch.
a.
If there
is
less than .005
of
an
inch play
or
if the end play
is
between .005 and .010
of
an inch,
then remove the bearing cap and
place a gasket (16) on the cap.
Check
for
end play again. If the
end
play is correct,
go
to
step
8.
b.
If there is
more
than .010 of
an
inch
play, then remove the bearing
cap and shim
(18)
accordingly.
Test
for
end play again. If the end
play
is
correct, remove the bearing
cap and place a gasket
(16)
on the
cap. Then
go
to
step
8.
8.
Install the
front
bearing cap
and secure it with bolts
(12)
and
lockwashers (13). If lockwashers
are
not
available, apply a coating
of
non-hardening gasket sealer
to
the
tip
of the bolts.
9.
Apply
a layer of
non-
hardening gasket sealer to the
outer
sealing edge
of
the
front
bearing cap oil seal (15). Install the
seal flush with the bearing cap.
10,;
Apply
a layer
of
non-
hardening gasket sealer
to
the
outer
sealillg edge
of
the rear
drive shaft oil seal (11). Install the
seal and stop when
you
feel the
seal hit the snap ring.
11.
Apply
a heavy coating of
grease to the
dog
clutch (5),
including the groove in the outer
surface. Slide the dog clutch on
the drive shaft, making sure the
three "ears" point
to
the rear of the
transmission.
12.
Align the keyway in the shaft
and the keyway in the
dog
clutch
and insert the key
(10)
all the way
forward.
13.
Using snap ring pliers,
install the (external) snap ring (4)
that retains the dog clutch to
the drive shaft. The flat side of the
snap ring should face the rear of
the transmission.
Although
not
easy
to
observe, the snap ring has
a flat side and a rounded side.
14.
Stick
your
finger in the
eccentric shaft assembly hole and
position the groove on the
dog
clutch in the center of the hole.
15.
Apply
a thin coating of
grease to the socket head screw
(or ball bearing assembly on ear-
lier models) on the eccentric shaft
assembly and the shifting arm
(6-9). Then insert the assembly
into
the hole.
Hold
the assembly
so that the socket head screw is at
12
o'clock.
16.
Using
your
fingers, gently
turn the hex
nut/bushing
(6) until
the hex
nut
is snug against the
power
unit
housing.
Note:
The
hex
nut/bushing
should turn freely at all times until
the nut is against the housing.
Do
not
use force; you can damage
the eccentric shaft
or
socket head
screw. If necessary, back the
nut
off
a few turns and rotate the eccen-
tric
shaft a fraction of a turn. Then
try
to
thread the nut inward again.
17.
Make sure that you have
properly seated the screw head in
the clutch groove. Rotate the
eccentric shaft back and forth
while looking
through
the rear
of
housing.
The
screw is properly
seated if the clutch moves back
and forth with each turn of the
eccentric shaft.
18.
Tighten the hex
nut/bushing
securely with a wrench.
19.
Fill the
dog
clutch
cavity with
grease. Stop where the housing
bore widens
to
accept the tiller
attachment sleeve.
20.
Attach the
Tines/PTa
Clutch
Lever (2) and finger tighten the
bolt (1) that holds the lever.
21.
Install the
PTa
power
unit
housing cover. See the instruc-
tions in this section.
22.
Install the drive shaft pulley
by reversing steps 5 and 6 of the
drive shaft removal instructions.
Pinion Shaft
Assembly
These instructions describe
how
to
service the pinion shaft assem-
bly. Before you can service the
pinion shaft assembly you must
first drain the transmission gear oil
and remove the
PTa
power
unit
drive shaft assembly. See the drive
shaft removal instructions in this
section.
Use Figure 5-4
as
a reference
for
part locations in these
instructions.
Removal
1.
Using a 3/16-inch
punch
and a
hammer,
knock
out
the spirol roll
pins (1)
from
the pinion bearing
retaining plugs (2) on each side
of
the housing.
2.
Using
pump
pliers
or
screw-in
pullers, remove the pinion bearing
retaining plugs.
3.
Cut
and discard the
a-ring
(3)
from
each retaining plug.
4.
Remove the shims (4)
from
either side of the housing.
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