Troy-Bilt Horse Tiller Technical Manual - Page 30

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

3d

Troy-Bilt Horse Tiller Technical Manual - Page 30

Tiller, Shaft, Assembly

Page 30 highlights