SECTION
5:
PTO
Power
Unit
Transmission
PTO
HORSE
MODEl
TECHNICAL
MANUAL
Page
5-9
4/90
..
Removal
Before
you
can service the wheel
shaft assembly, you must first
remove the pinion shaft assembly.
See the pinion shaft removal
instructions in this section.
1.
Remove the left side oil seal
(1). You can remove the seal with
a screwdriver and
hammer
by tap-
ping
in at
an
angle and
prying
against the the transmission case
(if necessary, use
two
screwdriv-
ers positioned at opposite sides
of
the
seal).
Note: Be careful
not
to
damage
the
wheel shaft with the screw-
driver(s) while prying.
2.
Remove and discard the left
side (external) snap ring (2) that
retains the wheel shaft (5) inside
the housing.
3.
Use a magnet
to
remove the
shim(s) (3). Discard the shim(s).
4.
Shift
the eccentric lever (12)
into
neutral.
The
clutch
and gears
must be disengaged.
5.
Using a rubber mallet, tap the
wheel shaft
to
the right while you
slowly
turn
the fast speed (small-
er) gear (4). The
object
is
to line
up
the key (14) in the shaft with
the keyway in the fast speed gear.
This is a trial and error procedure.
Keep
trying
until you feel the key
in the shaft begin to advance
through
the fast speed gear. After
the key begins
to
pass
through
the
gear,
continue
until you remove
the wheel shaft (5) along with the
right side bronze bushing (8), oil
seal (1), snap ring (6), and shims
(7). Discard the bushing, oil seal,
snap ring, and shims(s).
6.
Check
that the
hi-pro
key (14)
is still attached
to
the wheel shaft.
If it is not, retrieve it
from
inside
the housing.
7.
Lift the
slow
speed (larger)
gear (9), fast speed gear, clutch
(10), and three
clutch
guide
pins
(11)
out
of
the housing.
8.
Remove and discard the
bronze bushing (13) from the left
side
of
the housing. Use an old
wheel shaft inserted from the
right-hand side to drive the
bush-
ing out.
Inspection
These instructions describe
how
to
inspect vital parts on the wheel
shaft assembly. In addition to
inspecting the parts you have
removed, you should also inspect
any replacement parts you will
use.
Note:
Thoroughly
degrease and
clean all parts before inspection.
Wheel Shaft -
• If the wheel shaft
is
scored
or
pitted
around
the oil seal areas,
you may be able
to
relocate the oil
seals further out,
or
in, in
order
to
avoid the damaged area.
• If there is corrosion around the
oil seal areas,
try
using
an
emery
cloth to clean the area.
If
the
wheel shaft is badly scored
or
pit-
ted around the oil seal areas, dis-
card the wheel shaft.
• If the seal area is excessively
worn, discard the wheel shaft.
• Examine both ends
of
the
wheel shaft
for
burrs
or
rough
edges that
could
prevent the shaft
from passing
through
the gears
or
clutch. Use a file
or
emery cloth to
remove any rough spots.
• If the outside edges
of
the
snap ring grooves are rounded,
you will have
to
discard the wheel
shaft
as
these edges bear the
force
of
the snap rings.
If the grooves have expanded you
may be able to use shims
to
take
up
the slack. If not, discard the
wheel shaft.
• If the area around the keyway
has bubbled due
to
key move-
ment, discard the wheel shaft. See
"Testing
for
a Bubbled Wheel
Shaft" in Section
7.
Fast and Slow Speed Gears -
• If there are any broken
or
excessively worn teeth, discard
the gear.
• If the clutch
dogs
have worn a
groove more than 1/4
through
the
wall
of
the gear (usually
due
to
speed shifting), discard the gear.
Clutch -
• If the
clutch
dogs
are exces-
sively rounded, discard the clutch.
• If any
clutch
dogs
are missing,
discard the clutch.
• If the keyway is damaged,
yOL!
may be able
to
straighten it with a .
file. Otherwise, discard the
clutch'
Note: If the keyway is
too
wide,
the wheel shaft
is
more
likely
to
bubble and you may need
to
replace the wheel shaft soon
afterwards.
Gear Shifting Guide Pins - Make
sure the
guide
pins are absolutely
straight. If a pin is even slightly
bent, discard it.
Installation
Before you install the wheel shaft
assembly, the
eccentrk
shaft
assembly must first be installed.
See the eccentric shaft installation
instructions
in this section.
Use Figure 5-7
as
a reference
for
part locations in these
instructions.
1.
Before installing the wheel
shaft:
• Make sure the
hi-pro
key (14)
is
firmly
seated in the keyway.
• Make sure the
clutch
(10)
and
fast speed gear (4) pass freely
over the
hi-pro
key in the wheel
shaft. If there is any binding,
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