Troy-Bilt Horse Tiller Technical Manual - Page 34

PTO

HORSE

MODEL

TECHNICAL

MANUAL

Page

7.1

4/90

SECTION

7:

Special

Repairs

and

Procedures

Installing

a

New

Tines/PTO

/Clutch

Lever

Assembly

In

early

model

PTO

Horse

models,

a

ball

bearing

assembly

on

the

Tines/PTO

Clutch

Shaft

func-

tioned

as

the

contact

piece

that

moved

the

PTO

power

unit

dog

clutch

to

engage

the

tiller

attach-

ment

dog

clutch.

However,

time

has

demonstrated

that

the

ball

bearing

wears

prematurely

in

this

situation.

Therefore,

a

common

maintenance/service

procedure

is

to

replace

the

old

ball

bearing

assembly

with

a

new

style

screw

-

head

assembly

and

a

new

style

dog

clutch.

The

Part

Number

10353

service

kit

contains

all

the

parts

necessary

to

perform

this

procedure.

Removing

the

Existing

Assembly

1.

Separate

the

tiller

tine

attach-

ment

from

the

PTO

power

unit.

See

"Separating

the

Transmis-

sions"

in

Section

4.

2.

Make

the

PTO

power

unit

level

(horizontal).

3.

Remove

the

bolt

(1)

that

holds

the

clutch

lever

knob

(2)

to

the

clutch

lever

(3).

Then

remove

the

clutch

lever

knob

and

bolt

(see

inset,

Figure

7-1).

4.

Remove

the

bolts

(4)

that

hold

the

detent

plate

(5).

Then

remove

the

detent

plate.

(See

inset,

Figure

7-1).

5.

Remove

the

bolt

(6)

that

holds

the

clutch

lever

to

the

eccentric

shaft

(11)

and

remove

the

clutch

lever.

6.

Unscrew

the

eccentric

shaft

hex

nut/bushing

(7).

Then

lift

the

shaft

up

(tilting

the

assembly

in

the

housing

down)

and

withdraw

the

assembly

from

the

housing.

WARNING:

When

servicing

the

machine,

prevent

uninten-

tional

starting

of

the

engine

by

disconnecting

the

spark

plug

wire

and

keeping

the

wire

away

from

the

spark

plug.

Place

the

engine

throttle

control

in

the

OFF

position and

shift

the

Wheels/Tines/PTO

Drive

Lever

into

NEUTRAL.

3

6

&

I

N

7

11

Figure

7-1:

Tines/PTO

Clutch

Lever

Assembly.

1

2

4

10

9

O

Discard

the

eccentric

shaft

assembly.

7.

Remove

and

discard

the

(external)

snap

ring

(8)

that

retains

the

dog

clutch

(9)

to

the

drive

shaft.

8.

Remove

and

discard

the

dog

clutch.

9.

Remove

and

discard

the

key

(10)

that

holds

the

dog

dutch

on

the

drive

shaft.

Installing

a

New

Assembly

1.

Apply

a

coating

of

grease

to

the

new

dog

clutch

(9)

(Part

No.

2120-3)

and

slide

it

on

the

drive

shaft.

Make

sure

the

three

ears

point

toward

the

rear

of

the

transmission.

2.

Align

the

keyway

in

the

shaft

and

the

keyway

in

the

dog

clutch

and

insert

the

new

key

(10)

(Part

No.

9301)

all

the

way.

forward.

3.

Install

a

new

(external)

snap

ring

(8)

(Part

No.

9500)

to

retain

the

dog

clutch

to

the

drive

shaft.

Install

the

flat

side

of

the

snap

ring

facing

the

rear

of

the

transmission.

Although

not

easy

to

observe,

the

snap

ring

has

a

flat

side

and

a

rounded

side.

4.

Stick

your

finger

in

the

eccentric

shaft

assembly

hole;

you

want

to

position

the

groove

on

the

34

Troy-Bilt Horse Tiller Technical Manual - Page 34

Special, Repairs, Procedures

Page 34 highlights