Troy-Bilt Horse Tiller Technical Manual - Page 26

PTO

HORSE

MODEL

TECHNICAL

MANUAL

Page

5-10

4/90

SECTION

5:

PTO

Power

Unit

Transmission

check

for

burrs

or

rough

edges

either

on

the

key

or

in

the

keyway.

•

Make

sure

there

are

no

burrs

or

rough

edges

in

the

bore

open-

ing

of

the

slow

speed

gear

(9).

•

Using

a

spray

lubricant,

lubri-

cate

the

clutch

where

the

shaft

and

pins

will

fit.

2.

Insert

the

three

clutch

guide

pins

(11)

into

the

clutch.

If

a

guide

pin

binds,

discard

it

and

use

a

new

one.

3.

Assemble

the

fast

gear,

clutch,

and

slow

gear;

the

gear

hubs

face

out.

4.

Insert

a

piece

of

wood

between

the

eccentric

lever

(12)

and

the

housing

to

relieve

the

pressure

of

the

eccentric

shaft

(15)

on

the

clutch

as

you

are

install-

ing

it.

5.

Gently

place

the

gear

and

clutch

assembly

into

the

housing

so

that

the

eccentric

pin

(16)

fits

into

the

groove

on

the

clutch.

Make

sure

the

smaller

(fast

speed)

gear

is

on

the

right

side.

6.

Look

through

the

wheel

shaft

opening

and

line

up

the

keyways

on

the

fast

speed

gear

and

clutch.

7.

Insert

the

wheel

shaft

through

the

right

side

and

slip

it

through

the

gears

and

clutch.

8.

Remove

the

piece

of

wood

from

the

eccentric

lever

and

check

to

make

sure

the

eccentric

shaft

can

move

freely

from

side

to

side.

9.

Using

#30

weight

oil,

lubricate

the

bronze

bushings

(8,

13).

10.

Making

sure

the

oil

pick-up

grooves

are

facing

in,

use

a

hammer

to

insert

a

bronze

bush-

ing

(8

or

13)

about

1/8

of

the

way

in

the

housing.

11.

Using

a

rubber

hammer

and

driver,

and

making

sure

the

oil

pick-up

grooves

are

facing

in,

install

the

other

bronze

bushing

(8

or

13)

so

that

the

edge

of

the

bushing

is

flush

with

the

edge

of

the

counterbore

in

the

transmis-

sion

housing.

Then

finish

instal-

ling

the

other

bushing

in

a

similar

manner.

12.

Use

a

rubber

hammer

to

strike

down

on

the

wheel

shaft

on

both

sides

of

the

housing.

This

will

loosen

the

shaft

and

make

it

easy

to

turn.

13.

On

the

left

or

right

side

(it

doesn't

matter

which

side),

insert

a

.062"

wheel

shaft

shim

(3,

7)

and

then

install

a

snap

ring

(2,

6).

Gently

tap

this

end

of

the

shaft

inward

so

that

the

snap

ring

is

flush

against

the

bushing.

Note:

The

snap

ring

has

two

sides:

a

flat

side

and

a

rounded

side.

Make

sure

the

flat

side

is

against

the

outside

edge

of

the

groove.

14.

Go

to

the

other

side

of

the

housing

and

shim

(3,

7)

the

gap

between

the

bushing

and

the

snap

ring

groove.

15.

Install

the

snap

ring

(6)

after

you

shim

the

wheel

shaft.

16.

Using

a

rubber

hammer,

tap

down

on

both

ends

of

the

wheel

shaft.

Then

check

for

end

play.

There

should

be

between

.005"

and

.015"

play

in

the

shaft.

Add

or

remove

shims

as

needed.

17.

Turn

the

wheel

shaft

with

your

hand;

it

should

spin

freely.

Also,

there

should

be

no

vertical

or

diagonal

play.

Vertical

or

diag-

onal

play

indicates

a

worn

bronze

bushing.

18.

Apply

a

layer

of

non

-

hardening

gasket

sealer

to

the

outside

edges

of

the

two

oil

seals

(1)

and

install

them

at

each

end

of

the

wheel

shaft.

Each

seal

should

be

flush

with

the

edge

of

the

transmission

housing.

Eccentric

Shaft

Assembly

These

instructions

describe

how

to

service

the

eccentric

shaft

assembly.

Before

you

can

remove

the

eccentric

shaft

you

must

first

remove

the

wheel

shaft.

See

the

wheel

shaft

removal

instructions

in

this

section.

Use

Figure

5-8

as

a

reference

for

part

locations

in

these

instructions.

Removal

1.

Remove

the

wheel

speed

shift-

ing

pin

(1)

from

the

eccentric

shaft.

2.

Turn

the

housing

upside

down.

Use

a

5/32

-inch

drift

to

remove

the

spirol

roll

pin

(2)

that

retains

the

eccentric

lever

(4)

to

the

eccentric

shaft

(3).

3.

From

the

outside

of

the

hous-

ing,

tap

the

eccentric

shaft

(3)

inward

until

you

remove

the

eccentric

lever

(4).

4.

Continue

tapping

the

eccen-

tric

shaft

inward

until

the

shaft

drops

into

the

housing.

5.

Remove

the

spring

(6)

and

washer

(7)

from

the

shaft.

6.

Remove

and

discard

the

eccen-

tric

shaft

oil

seal

(5).

You

can

use

a

small

screwdriver

to

pry

it

out.

Inspection

If

the

seal

area

on

the

eccentric

shaft

is

excessively

worn

or

scored,

discard

the

eccentric

shaft.

Minor

scoring

can

be

removed

with

an

emery

cloth.

Installation

Use

Figure

5-8

as

a

reference

for

part

locations

in

these

instructions.

1.

Put

the

eccentric

shaft

spring

(6)

and

washer

(7)

on

the

eccen-

tric

shaft

(3).

2.

Insert

the

eccentric

shaft

assembly

into

the

PTO

power

unit

Troy-Bilt Horse Tiller Technical Manual - Page 26

Eccentric, Shaft, Assembly

Page 26 highlights