Troy-Bilt Horse Tiller Technical Manual - Page 19

SECTION

5:

PTO

Power

Unit

Transmission

PTO

HORSE

MODEL

TECHNICAL

MANUAL

Page

5-3

4/90

PTO

Power

Unit

Drive

Shaft

These

instructions

describe

how

to

service

the

PTO

power

unit

drive

shaft.

Before

you

can

per-

form

these

instructions

you

must

first

remove

the

PTO

power

unit

housing

cover.

See

"PTO

Power

Unit

Housing

Cover"

in

this

sec-

tion

for

removal

instructions.

Use

Figure

5-2

as

a

reference

for

part

locations

in

these

instructions.

Note:

Either

of

two

basic

types

of

drive

shafts

may

have

been

in-

stalled

at

the

factory:

an

integral

worm

design

(worm

is

machined

directly

from

the

shaft

material),

or

a

welded

worm

design

(the

worm

is

welded

to

the

shaft

and

can

be

identified

by

blue

welds

at

either

end

of

the

worm).

Each

design

has

its

own

part

number

and

requires

specific

related

parts.

Before

installing

a

new

drive

shaft

or

related

drive

shaft

parts,

first

determine

which

type

of

shaft

you

are

working

with.

See

the

tiller

parts

catalog

for

parts

ordering

information.

Removal

1.

Remove

the

bolt

(1)

that

holds

the

Tines/PTO

Clutch

Lever

(2)

to

the

clutch

lever

eccentric

shaft

(3).

Then

remove

the

lever

from

the

shaft.

2.

Loosen

the

hex

nut/bushing

(6)

on

the

Tines/PTO

Clutch

Lever

shaft

and

remove

the

remainder

of

the

Tines/PTO

Clutch

Lever

assembly

(6-9).

Observe

the

part

of

the

lever

(9)

that

engages

the

dog

clutch

(5).

If

it

is

excessively

worn

or

damaged,

or

if

the

cus-

tomer

has

had

difficulty

engag-

ing

the

tiller

attachment,

replace

the

part

with

a

newer

-style

socket

head

screw

that

is

included

with

a

complete

conversion

kit

(Part

No.

12

13

19

14

16

18

_nom

I

20

22

20

0

22

19

15

2

1

3

,

24

25

26

27

Figure

5-2:

PTO

Power

Unit

Drive

Shaft.

4

1

21

11

10

0

10353).

Refer

to

"Installing

a

New

Tines/PTO

Clutch

Lever

Assem-

bly"

in

Section

7

of

this

manual.

3.

Use

snap

ring

pliers

to

remove

the

(external)

snap

ring

(4)

that

retains

the

dog

clutch

(5)

to

the

drive

shaft

(17).

You

will

have

to

push

in

the

dog

clutch

(5)

to

gain

access

to

the

snap

ring.

4.

Remove

the

dog

clutch

using

a

pair

of

needle

nose

pliers.

Also

make

sure

you

retrieve

the

drive

shaft

key

(10).

5.

Remove

the

bolt

(23)

and

con-

cave

washer

(24)

that

hold

the

transmission

pulley

(25)

to

the

drive

shaft.

6.

Remove

the

pulley

and

the

drive

shaft

key

(26).

On

welded

drive

shafts,

remove

the

shoulder

washer

(27).

7.

Remove

the

bolts

(12)

and

lockwashers

(13)

that

hold

the

front

bearing

cap

(14).

8.

Remove

the

front

bearing

cap.

9.

Use

an

arbor

press

to

remove

the

oil

seal

(15)

from

the

front

bearing

cap.

10.

Remove

and

discard

the

gasket

(16)

from

the

front

bearing

cap.

11.

Pull

the

drive

shaft

(17)

for-

ward

slightly

just

enough

to

dis-

lodge

the

shims

(18).

Remove

the

shims.

12.

Remove

the

front

bearing

cup

(20)

from

the

housing.

Note:

Keep

each

bearing

cup

paired

with

its

bearing

if

you

intend

to

reuse

them.

Each

bear-

ing

cup

wears

differently

accord-

ing

to

its

bearing.

13.

Remove

the

drive

shaft

through

the

front

of

the

transmis-

sion

housing.

14.

Insert

a

long

bar

in

through

the

front

of

the

transmission

hous-

ing

to

knock

out

the

rear

oil

seal

(11).

Be

careful

to

not

damage

the

inside

of

the

housing,

the

bearing

cup

(20),

or

the

retaining

ring

(21).

15.

Put

your

hand

down

through

the

top

of

the

housing

and

remove

the

rear

bearing

cup

(20).

If

you

Troy-Bilt Horse Tiller Technical Manual - Page 19

Power, Drive, Shaft

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