Troy-Bilt Horse Tiller Technical Manual - Page 29

SECTION

6:

Tiller

Attachment

Transmission

PTO

HORSE

MODEL

TECHNICAL

MANUAL

Page

6-2

4/90

3.

Remove

the

dog

clutch

and

the

key

(3).

4.

Remove

the

dog

clutch

spring

(4).

5.

Remove

the

dog

clutch

shim

(5).

6.

Remove

the

second

(external)

snap

ring

(2a).

7.

Remove

the

three

bolts

(6)

that

secure

the

rear

bearing

cap

(7),

also

removing

and

discarding

the

nylon

washers

(8),

if

any.

Have

a

pan

ready

to

catch

the

gear

oil

that

will

pour

out

when

you

remove

the

rear

bearing

cap

in

the

next

step.

8.

Remove

the

rear

bearing

cap

and

the

gasket

(9).

Discard

the

gasket.

9.

Use

a

rubber

hammer

to

tap

the

forward

end

of

the

drive

shaft

(11)

toward

the

rear

of

the

hous-

ing.

As

you

are

tapping

the

shaft,

catch

the

bearing

cap

shims

(10)

and

bearing

cup

(12)

at

the

rear

of

the

shaft.

Discard

the

shims.

Drive

the

shaft

out

until

the

drive

shaft

worm

clears

the

housing.

Leave

the

drive

shaft

in

this

position

until

you

complete

step

10.

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.

10.

Remove

the

tiller

tine

shaft

assembly.

See

the

tiller

tine

shaft

removal

instructions

in

this

sec-

tion.

You

must

remove

the

tiller

tine

shaft

before

you

can

com-

pletely

remove

the

tiller

drive

shaft.

11.

Remove

the

tiller

drive

shaft.

12.

Remove

the

oil

seal

(13)

by

placing

a

long

bar

through

the

rear

of

the

housing

and

tapping

the

seal

out.

Take

care

not

to

damage

the

bear-

ing

cup

(14),

snap

ring

(15),

or

tiller

housing.

13.

Remove

the

(internal)

snap

ring

(15)

that

retains

the

front

bearing

cup

(14)

using

a

pair

of

snap

ring

pliers.

14.

Remove

the

bearing

cup.

If

the

bearing

cup

resists,

insert

an

old

tiller

drive

shaft

into

the

back

of

the

transmission

housing

and

use

its

bearing

to

nudge

the

bear-

ing

cup

forward.

It

is

not

recom-

mended

that

you

use

a

good

drive

shaft

for

this.

Note:

Remember

to

keep

track

of

which

bearing

cups

go

with

which

bearings.

You

will

need

to

assem-

ble

them

in

the

same

pairs.

15.

After

the

drive

shaft

is

removed

and

you

have

an

empty

tiller

housing,

thoroughly

degrease

and

clean

the

inside

and

outside

of

the

housing.

16.

The

drive

shaft

bearings

(16)

are

pressed

-on

and

can

be

removed

(if

necessary)

with

an

arbor

press

and

a

bearing

puller

attachment.

On

the

welded

worm

style

drive

shaft

only,

remove

the

shoulder

washer

(17)

after

remov-

ing

the

front

bearing.

Inspection

These

instructions

describe

how

to

inspect

parts

on

the

tiller

drive

shaft.

In

addition

to

inspecting

the

parts

you

have

removed

from

the

tiller

housing,

you

should

also

inspect

any

replacement

parts

you

will

use.

Note:

Thoroughly

degrease

and

clean

all

parts

before

inspection.

Drive

Shaft

—

•

The

drive

shaft

should

not

be

scored,

pitted,

or

corroded

where

the

oil

seal

is

located.

If

the

shaft

is

lightly

corroded,

you

might

be

able

to

clean

it

using

an

emery

cloth.

If

the

shaft

is

slightly

scored

or

pitted

you

might

be

able

to

adjust

the

position

of

the

front

seal

so

that

it

is

seated

on

a

smooth

part

of

the

shaft.

If

the

drive

shaft

is

excessively

pitted

or

corroded,

especially

in

the

area

where

the

oil

seal

seats,

discard

the

drive

shaft.

•

Inspect

the

drive

shaft

for

burrs

or

rough

spots

at

the

ends

of

the

shaft

and

where

the

bearings

fit

on

the

shaft.

Use

a

file

or

emery

cloth

to

remove

rough

spots

or

burrs,

being

careful

not

to

remove

too

much

metal

where

the

bearings

will

be

seated.

(Doing

so

will

pre-

vent

the

proper

fit

of

the

bearings

on

the

shaft.)

•

The

keyway

should

be

just

wide

enough

for

the

key

to

fit.

If

the

keyway

expands

and

becomes

too

wide;

discard

the

tiller

drive

shaft.

•

The

two

snap

ring

grooves

should

be

just

wide

enough

to

fit

the

snap

ring.

If

the

groove

becomes

too

wide,

you

will

have

to

discard

the

tiller

drive

shaft.

Also,

the

forward

-facing

edges

of

the

grooves

should

not

be

rounded

off;

these

are

the

edges

that

bear

the

force

of

the

snap

ring.

If

this

edge

is

rounded

you

must

discard

the

tiller

drive

shaft.

Worm

—

The

worm

should

not

be

excessively

worn.

Since

only

the

middle

of

the

worm

is

in

contact

with

the

bronze

worm

gear

on

the

tiller

tine

shaft,

you

can

compare

the

end

of

the

worm

(on

the

tiller

drive

shaft)

with

the

middle.

If

the

width

of

the

teeth

in

the

middle

is

half

or

less

than

the

width

of

the

teeth

at

the

ends,

discard

the

tiller

drive

shaft.

Also,

inspect

the

worm

for

heat

damage.

If

the

worm

has

a

bluish

color

then

proper

lubrication

has

not

been

maintained;

discard

the

tiller

drive

shaft.

Bearings

-

If

the

bearing

has

a

bluish

color

then

proper

lubrica-

Troy-Bilt Horse Tiller Technical Manual - Page 29

attachment.

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