PTO
HORSE
MODEL
TECHNICAL
MANUAL
Page
6-3
4/90
SECTION
6:
Tiller
Attachment
Transmission
tion has
not
been maintained; dis-
card the bearing and bearing cup.
Also, if the bearing
or
its
cup
is
scored
or
excessively worn,
dirt
may have
gotten
inside the trans-
mission. If the
cup
is scored
or
excessively worn, discard the
bearing and bearing cup.
Inspect
for
chipped
or
broken
roller bearings, and inspect the
bearing cage
for
damage.
Installation
Use Figure
6-1
as
a reference
for
part locations in these instructions.
1.
Spread a layer of #30 weight
oil on the inside
of
the
front
bear-
ing
cup
(14). Make sure the
beveled
cup
is facing the correct
way
to
receive the bearing and
insert the bearing
cup
into the
front
of
the tiller housing.
Note: Remember
to
match the
bearings to the bearing cups
as
you
found
them before
disassembly.
2.
Install the (internal) snap
ring
(15)
used
to
retain the
front
bearing cup. Make sure the flat
side of the snap ring is towards
the
front
of the tiller attachment
(towards the PTO
power
unit).
Although
not
easy
to
observe, the
snap ring has a flat side and a
rounded side.
If you have some
difficulty
insert-
ing the snap ring in the groove,
insert the ring past the groove.
Then use the drive shaft to slide
the ring forward and into the
groove.
3.
Using #30
weight
oil, lubricate
both bearings on the drive shaft.
Note: Follow this procedure
to
install new bearings on the drive
shaft:
a.
On
the
welded
worm
style drive
shaft only, place the
shoulder
washer (17)
on
the
front
of the
drive shaft.
b.
Lubricate the new bearings
with #30 weight oil.
c.
Using an
arbor
press, install
the
front
bearing until it stops at
the drive shaft shoulder. Install the
rear bearing until it stops against
the worm.
4.
Insert the tiller drive shaft
(11)
through
the rear
of
the tiller
housing.
5.
Spread a layer of #30 weight
oil on the inside of the rear bear-
ing cup (12). Make sure the
beveled cup is facing the correct
way to receive the bearing. Insert
the bearing
cup
into
the back of
the tiller housing.
6.
Place a gasket
(9)
on the rear
bearing cap (7) and gently tap the
cap into place. Securely attach the
cap with all three screws
but
do
not use a gasket sealer on the
screws
or
install nylon washers at
this point. You will next check for
play in the drive shaft.
7.
Using a mallet, tap the drive
shaft
to
the rear
to
seat the bear-
ing cup. Push and pull the forward
end
of
the tiller drive shaft. You
should feel between .005" and
.010" play in the shaft.
Remove the rear bearing cap and
shim
accordingly
(start with the
thinnest shims). Repeat this
procedure until the forward and
backward play in the drive shaft is
between .005" and .010".
8.
Remove the three screws from
the rear bearing cap.
9.
Install the rear bearing cap
and secure it with screws
(6)
and
nylon
washers (8). If washers are
not
available, you can coat the
tip
of the screws with a layer of
non-
hardening gasket sealer.
10.
Apply
a layer of
non-
hardening gasket sealer
to
the
outside edge of the tiller drive
shaft oil seal (13). Then install the
oil seal.
11.
Install the (external) rear
snap ring (2a) that retains the
dog
clutch
to
the shaft. Make sure the
flat side
of
the snap ring
is
towards
the rear of the tiller attachment.
12.
Install the
dog
clutch
shim (5).
13.
Install the
dog
clutch
spring (4).
14.
Install the key (3) in the
keyway.
15.
Slide
the
dog
clutch (1) over
the key, with the "ears" on the
clutch facing forward.
16.
Push the
dog
clutch in and
install the (external) snap ring
(2)
that retains the
dog
clutch
to
the
shaft. Make sure the flat side
of
the snap ring
is
towards the
front
of the tiller attachment.
If you have some
difficulty
insert-
ing the snap ring in the groove,
insert the ring past the groove.
Then let
the
dog
clutch slide
for-
ward and it will push the ring
forward
into
the groove.
17.
Install the tiller tine shaft. See
the instructions in this section.
Tiller Tine Shaft
Assembly
These instructions describe
how
to
remove, inspect, and install the
tiller attachment's tine shaft
assembly.
Use Figure 6-2
as
a reference
for
part locations in these
instructions.
Removal
You will have to disassemble the
tiller tine shaft assembly
to
replace
a damaged
worm
gear, bearing,
or
shaft. Also, you will have
to
remove the tiller tine shaft
to
remove the tiller drive shaft. See
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