Troy-Bilt Horse Tiller Technical Manual - Page 21

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

sealing

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/PTO

Clutch

Lever

(2)

and

finger

tighten

the

bolt

(1)

that

holds

the

lever.

21.

Install

the

PTO

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

PTO

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

O-ring

(3)

from

each

retaining

plug.

4.

Remove

the

shims

(4)

from

either

side

of

the

housing.

Troy-Bilt Horse Tiller Technical Manual - Page 21

Pinion, Shaft, Assembly

Page 21 highlights