PTO
HORSE
MODEL
TECHNICAL
MANUAL
Page
5-10
4/90
SECTION
5:
PTO
Power
Unit
Transmission
check
for
burrs
or
rough edges
either on the key
or
in the keyway.
• Make sure there are no burrs
or
rough edges in the bore open-
ing
of
the slow speed gear (9).
• Using a spray lubricant,
lubri-
cate the clutch where the shaft
and pins will fit.
2.
Insert the three clutch guide
pins
(11)
into the clutch. If a guide
pin binds, discard it and use a
new one.
3.
Assemble the fast gear, clutch,
and slow gear; the gear hubs
face out.
4.
Insert a piece
of
wood
between the eccentric lever (12)
and the housing
to
relieve the
pressure
of
the eccentric shaft
(15)
on the clutch
as
you are install-
ing it.
5.
Gently place the gear and
clutch assembly into the housing
•
so that the eccentric pin
(16)
fits
into
the groove an the clutch.
Make sure the smaller (fast speed)
gear
is
on the right side.
6.
Look
through
the wheel shaft
opening and line up the keyways
on the fast speed gear and clutch.
7.
Insert the wheel shaft
through
the right side and slip it
through
the gears and clutch.
8.
Remove the piece of
wood
from the eccentric lever and check
to make sure the eccentric shaft
can move freely
from
side
to
side.
9.
Using #30 weight oil, lubricate
the bronze bushings
(8,
13).
10. Making sure the oil
pick-up
grooves are facing in, use a
hammer
to
insert a bronze bush-
ing
(8
or
13)
about
1/8 of the
\Nay
in the housing.
11.
Using a rubber hammer and
driver, and making sure the oil
pick-up
grooves are facing in,
install the other bronze bushing
(8
or
13)
so that the edge
of
the
bushing
is
flush with the edge
of
the counterbore in the transmis-
sion housing. Then finish instal-
ling the other bushing
in
a similar
manner.
12.
Use a rubber hammer
to
strike
down
on the wheel shaft on
both sides of the housing. This will
loosen the shaft and make it easy
to turn.
13.
On the left
or
right side (it
doesn't matter which side), insert
a .062" wheel shaft shim
(3,
7)
and
then install a snap ring
(2,
6).
Gently tap this end
of
the shaft
inward so that the snap ring
is
flush against the bushing.
Note: The snap ring has
two
sides: a flat side and a rounded
side. Make sure the flat side
is
against the outside edge
of
the
groove.
14.
Go
to
the other side
of
the
housing and shim
(3,
7)
the gap
between the bushing and the snap
ring groove.
15.
Install the snap ring (6) after
you shim the wheel
shaft.
"
,.
16.
Using a rubber hammer, tap
down
on both ends
of
the wheel
shaft. Then check
for
end play.
There should be between .005"
and .015" play in the shaft. Add
or
remove shims
as
needed.
17.
Turn the wheel shaft with
your
hand; it should spin freely.
Also, there should be no vertical
or
diagonal play. Vertical
or
diag-
onal play indicates a worn bronze
bushing.
18.
Apply
a layer
of
non-
hardening gasket sealer
to
the
outside edges
of
the
two
oil seals
(1) and install them at each end
of
the wheel shaft. Each seal should
be flush with the edge of the
transmission housing.
Eccentric Shaft
Assembly
These instructions describe
how
to
service the eccentric shaft
assembly. Before you can remove
the eccentric shaft you must first
remove the wheel shaft. See the
wheel shaft removal instructions in
this section.
Use Figure 5-8 as a reference
for
part locations in these instructions.
Removal
1.
Remove the wheel speed shift-
ing pin (1) from the eccentric shaft.
2.
Turn the housing upside
down. Use a 5/32-inch
drift
to
remove the spirol roll pin (2) that
retains the eccentric lever (4)
to
the eccentric shaft (3).
3.
From the outside
of
the hous-
ing, tap the eccentric shaft (3)
inward until you remove the
eccentric lever (4).
4.
Continue
tapping the eccen-
tric shaft inward until the shaft
drops into the housing.
5.
Remove the spring (6) and
washer (7) from the shaft.
6.
Remove and discard the eccen-
tric shaft oil seal (5).
You
can use a
small screwdriver
to
pry it out.
Inspection
If the seal area on the eccentric
shaft
is
excessively worn
or
scored, discard the eccentric
shaft.
Minor
scoring can be
removed with an emery cloth.
Installation
Use Figure 5-8 as a reference
for
part locations in these instructions.
1.
Put the eccentric shaft spring
(6) and washer (7) on the eccen-
tric shaft (3).
2.
Insert the eccentric shaft
assembly into the PTO
power
unit
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