Amf 1970 ski-daddler sd15m21 a Quick start guide

)

PARTS

AND

SERVICE

MANUAL

~970

SKI-DADDLER

SNOWMOBILES

MARK

VI

[SD15M21

A]

MARK

xx

[SDI5M11A]

MARK

xx

[SDI5M22A]

MARK

xx

[SDI5M23A]

AMERICAN

MACHINE

&

FOUNDRY

COMPANY

CONSUMER

PRODUCTS

SA

L

ES

DIVISION

PARTS

&

SERVICE

DEPARTMENT

Whiteford

Road,

York,

Pennsylvania

17402

PART NO

37894

-

o

c

~I

TABLE

OF

CONTENTS

INrRODucrloN

PREDELIVERY

INSrRUCTlONS .

Install Ski

Assembly

. . . .

Install Windshield Ass

embly

Fuel Mixture Instructions

Lubrication . . . . . .

SERVICE

AND

REPAIR

Hood Removal

and

Installation

Hood

Assembly

Repair . . . .

Replace Lamp Assemblies . . .

Steering

and

Ski

As

s

embly

Alignment

.

°To

Remove

Drive Chain

Adjustment

To

Remove

Variable-Speed Drive

Belt.

Variable-Speed Drive Belt

Adju

s

tm

ent

To

Remove

Drive Clutch

Alignment.

.

To

Remove

Driven Clutch .

To

Remove

Brake

Assembly

Brake

Adjustment

. 0 • •

To

Remove

Carburetor-Mark

VI

and

Mark

XX

295

only

To

Remove

Carburetor-Mark

XX

399

and

439

only.

Carburetor

Adjustment

. . . . . . . .

Throttle Plate

Adjustment,

HD

Carburetor . . . . .

Throttle Plate

Adjustment,

HR

Carburetor . . . . .

To

Remove Engine

and

Support

Assembly-Mark

VI

only

To

Remove

Engine

and

Support

Assembly-Mark

295

only

CONTENTS

To

Remove

Engine

and

Support

Assembly-Mark

XX

399

and

439

only

To

Remove

Gas

Tank

..

To

Remove

Muffler

To

Remove

Bogie

Wheel

To

Remove

Bogie

Wheel

and

Support

Assembly

To

Remove

Bogie

Wheel

Torsion

Springs.

0

To

Remove

Traction Belt Take-Up

Assembly

To

Remove

Sprocket Seals

and

Be

arings

To

Re

move

Drive Sprocket

Assembly

To

Re

move

Traction Belt

Adjustment

. .

Spark Plug Interchangeability

Wiring

Diagrams

Troubleshooting.

. • . . .

Iu.usrRArED PARrS

L1sr

.

Pag

e

3

3,

3

4

5

6

7

8

9

10

JJ

12

13

14

15

16

J6

16

c

INTRODUCTION

This

manual

has

been

prepared

to

provide

all

authorized

AMF

Ski-Daddler

Dealers,

Distributors

and

technicians

with

the

instructions

neces

sar

y

to

service

and

maintain

the

following 1970 AMF S

ki-

Daddler

snowmobiles.

Model

Designation

Mark

VI

(SD15M21A)

Mar

k XX (SD15MllA)

Mark

XX (SD15M22A)

Mark

XX

(SD15M23A)

Engine

Hirth

171R 634cc

JLO

L-295R

AMF

399BP

AMF 439BP

This

manual

is

presented

in

two

sections.

The

first

section,

Maintenance,

provides

the

instructions

necessary

for

sled

maintenance

and

service

while

the

second

section,

the

Illustrated

Parts

List

is

provided

to

assist

in

the

identification

of

all

major

assemblies

and

component

parts.

For

engine

maintenance,

refer

to

the

vendor

manual

for

the

particular

engine

or

the

AMF Engine

Main-

tenance

Manual

issued

for

all

AMF

engines.

If

the

information

in

this

manual

is

not

applicable

to

all

models,

the

exceptions

will

be

noted and

the

correct

information

for

the

particular

model

will

be

given.

PREDELIVERY INSTRUCTIONS

The

1970

Ski-Daddlers

are

shipped

completely

as-

sembled

except

for

the

windshield

assembly

and

the

ski

assembly.

These

assemblies,

plus

the

attaching

hardware

will

be found

in

the

shipping

carton.

Carefully

open

the

carton

and

immediately

inspect

the

equipment

for

any

damage

or

missing

items.

Install Ski

Assembly

•

Remove

the

locknut

and

screw

at

the

spring

mounting

bracket

(figure

1).

•

Place

th

e

spindle

pad

in

the

spring

mounting

bracket

with

the

thicker

section

and

the

directional

arrow

on

the

pad

pointing

forward.

NOTE:

The

plastic

bag

containing

the

spindle

pad

will

be

found

in

the

storage

compartment.

•

Install

the

ski

assembly

by

securing

the

spring

mounting

bracket

and

spindle

pad

to

lower

end of

3

~I

INTRODUCTION

IMS1dij

spindle

tube

assembly

as

shown

in

figure

1. Apply

30

foot-pounds

torque

to

the

locknut.

Do

not

over-

tighten

bo

lt

as

t

he

ski

assembly

should

float

freely

on

the

spindle.

•

Repeat

Install

Ski

Assembly

procedures

for

opposite

ski.

Figure 1

NOTE:

Properly

installed

skis

should

toe

out0-

to

1/2-inch

at

the

front

end

(see

figure

2)

and

should

be

symmetrical

about

the

centerline

of

the

sled.

If

alignment

is

necessary,

refer

to

the

Steering

and

Ski

Alignment

procedures.

Install

Windshield

Assembly

•

Remove

the

screws

securing

the

left-

and

right-

hand mounting

strips

to

the

hood.

Remove

the

mounting

strips.

•

Remove

the

protec

t

ive

cover

from

the

wind-

shield.

Place

the

windshield

in

position

on

the

hood

assembly.

Replace

the

mounting

strips

as

shown

in

figure

2.

•

Using

the

original

screws,

loosely

secure

the

mounting

strips

and

windshield

to

the

hood

assembly

starting

at

t

he

center

and

working

to

the

sides.

•

Engage

the

en

ds of

the

mounting

strips

in

the

trim

strip

on

the

windshield

and then

tighten

the

screws,

again

sta

r

ting

at

the

cen

t

er

and

workingto

the

sides.

NOTE:

Check

mounting

strips

for

sharp

edges

or

corners.

Use

a fine tooth

file

to

smooth

all

edges

and

corners.

PREDEL/VERY

/NSTRUCT/O

HOUNTING

STRIP,

RH

HOUNTING

STRIP,

LH

\WI:D

_

~:IELD

TRIH

~

•

TOE

OUT

0-

TO

1/2-

INCH

MAXIHUM

Figure 2

Fuel

Mixture

Instructions

I

WARNING

I

Never

fill

the

gasoline

tank

while

the

engine

is

hot. Wipe off

any

spilled

gasoline

before

attempting

to

start

engine.

The

correct

oil-to-gasoline

ratio

is

20: 1 (20

parts

regular

gasoline

to

1

part

oil). Too

much

oil

will

cause

carbon

deposits.

Too

little

oil

or

a

poor

mix

will

cause

insufficient

lubrication

and

possible

engine

damage.

IMPORTANT:

Gasoline

and

oil

should

be

mixed

at

temperatures

above

zero.

At

temperatures

below

zero,

gas

and

oil

mix

with

difficulty.

4

Fuels

containing

additives

are

not

recommend

ed

for

use

in

Ski-Daddler

engines.

For

mixingwithgaso

-

line,

use

only

oil

that

is

recommended

for

use

in

air-cooled,

2-cycle

engines

such

as

an

AMF

oil

or

an

equivalent

good

grade

of SAE 30

or

40

non-

detergent

motor

oil.

IMPORTANT: Some

outboard

motor

oils

contain

a

detergent

that

works

well

in

outboard

motors

that

operate

at

much

lower

temperatures

because

they

are

water

cooled.

However,

the

detergents

may

cause

spark-plug

fouling

in

the

air-cooled

engines

used

on

your

Ski-Daddler

.

Use

a

mixture

of

gasoline

and

oil

as

shown

in

Fuel

Mixture

Chart,

figure

3.

Never

use

gasoline

left

over

from

the

summer

or

Mix

the

gasoline

and

oil

thoroughly

in

a

clean

con-

tainer

kept

for

this

purpose

only.

The

best

way

to

ensure

a good

mix

is

to

pour

the

oil

into

the

empty

container

and then add a

small

amount

of

gasoline

and

mix

thoroughly.

Then

add

additional

amounts

of

gasoline

as

shown on

the

Fuel

Mixture

Chart.

Fill

Ski-Daddler

gas

tank

from

this

separate

container

of

mixed

fuel.

Use

a funnel with a

fine-screen

strainer

when

filling

the

tank.

The

gas

cap

is

located

under

the

gas

lid

and

hinge

assembly.

GASOLINE-OIL RATIO

2

0

I

1-1/2

L V

./

/

P

I

N

1/2

T

S

/ /

/

",.-

2 3 4 5

GASOLINE.

GALLONS

FUEl MIXTURE CHART

Figure 3

Lubrication

Refer

to

the

lubrication

chart

for

location

of

grease

fittings,

type of

lubricant

and

frequency.

)

SERVICE

AND

REPAIR

PART

LOCATION

TYPE

OF

LUBRICATION

FREQUENCY

Steering

spindles

Grease

zerk

on

spindle

Low-temperature

grease

20

hours

housings

Drive

chain

Chain

case

housing

No.2

Lithium

bearing

grease

20

hours

Bogie

wheels

Grease

zerk

in

center

of

Low-temperature

grease

20

hour

s

bogie wheel

Sprocket

bearings

Rear

sprockets

No.2

Lithium

bearing

grease

40

hours

LUBRICATION CHART

SERVICE

AND

REPAIR

Hood

Removal

and Installation

• To

remove

the

hood and

headlight

assembly,

disconnect

the

hood

and

the

sled

wiring

harness

at

the

quick-disconnect

below

the

console

on

the

right-hand

side

of

the

sled.

Release

the

hood

latch

assemblies

and

then

remove

the

hood and

headlight

assembly

by

lifting

rear

section

first.

• To

install

the

hood

and

headlight

assembly,

place

the

hood

in

position

on

the

sled

so

that

the

forward

hood

clip

and

the

bottom

edge of

the

hood

engages

the

clips

along

the

inside

edge of

the

bumper

strip.

•

Engage

the

left-

and

right-hand

latch

assemblies

to

secure

the

hood to

the

main

frame.

•

Connect

the

sled

wiring

harness

to

the

hood

wiring

harness

at

the

qUiCk

-disconnect

below

the

console

on

the

right-hand

side

of

the

sled.

Hood

Assembly

Repair

AMF

Fiberglass

Repair

Kits·

are

available

through

your

authorized

AMF

Distributor.

For

large

re-

pairs,

order

AMF

Fiberglass

Repair

Kit No.

1510693.

Smaller

repairs

can

be

made

with

Repair

Kit No. 1510765.

Paint

all

repaired

areas

on

the

hood

using

AMF

-Orange

color

paint

available

in

easy-to-use

spray

container,

AMF

Part

No.

1510828. Follow

the

instructions

in

the

kit

when

making

repairs.

Replace Lamp

Assemblies

Headlight. To

replace

the

headlightlamp

assembly,

simply

raise

the

headlight

assembly,

remove

the

screws

securing

the

cover

assembly

and

remove

5

the

cover

assembly.

Remove

the

defective

head-

light

and

replace

with new

lamp

assembly.

See

illustrated

parts

list

section

for

correct

part

numbers.

Taillight.

Remove

taillight

lens

and

cover

to

ex-

pose

the

taillight

bulbs.

Remove

the

defective

bulb

and

replace

with a new bulb. See

illustrated

parts

list

section

for

correct

part

numbers.

Steering and Ski

Assembly

Alignment

Good

steering

ability

requi

res

that

the

skis

be

properly

set

and

aligned

with

the

sled

body when

the

steering

handle

is

placed

in

the

straight

-ahead

position.

To

determine

that

the

skis

are

properly

aligned,

measure

the

distance

between

the

inside

edges

of

the

skis

at

the

front

end and

at

the

rear.

Properly

aligned

skis

should

toe

out

0-

to

1/2-inch

maximum

at

the

front.

Therefore,

the

overall

measurement

at

the

front

end of

the

skis

should

be

1/2

inch

greater

than

at

the

rear.

If

the

skis

or

steering

mechanism

are

not

properly

set,

adjust

as

follows.

•

Place

steering

handle

in

a

straight-ahead

posi

-

tion.

•

Remove

the

hood

assembly

.

•

Remove

the

bolt

(1,

figure

4), two

spacers

(2),

bottom

spacer

and

locknut

securing

the

rod

end

bearing

(3)

to

the

spindle

arm.

•

Loosen

the

jam

nuts

(4)

securing

both

rod

end

bearings

(3)

to

the

tie

rod

(5).

NOTE:

If

both

skis

need

adjustment,

repeat

pro-

cedure

for

the

opposite

ski.

~eMlal

SERVICE

AND

REPAIR

I~

NOTE: DUring

reasembly,

apply

proper

torque

to

the

clutch

bolt

as

shown

in

figur

e 6.

•

Reassembly

is

the

reverse

of

removal.

Perform

variable-speed

drive

belt

adjustment

and

drive

clutch

alignment

procedures.

Drive Clutch Alignment

•

Remove

the

hood

and

headlight

assembly.

Refer

to

Hood

Removal

and

Installation.

Always

disconnect

spark

plug

wires

before

working

on

the

engine

or

drive

elements.

•

Remove

the

clutch

guard.

•

Loos

en

the

engine holddown

nuts

securing

the

engine

supports

to

the

engine mount

straps

as

illustrated

in

figure

6.

•

Place

a

straightedge

on

the

fixed

face

of

the

drive

clutch

and

move

the

engine

until

the

offset

between

the

straightedge

and

the

front

and

rear

edges

of

the

driven

clutch

is

as

shown

in

figure

6.

Rotate

driven

clutch

90-

degrees

and

repeat

pro-

cedure.

•

Tighten

engine holddown

nuts

and

recheck

align-

ment.

Apply

25

foot-pounds

torque

when

tightening

the

engine

holddown

nuts.

DrMENS

~

ION

MARK

VI

295

R

399

439

A

INCHES

0.30

0.240

0.30

l

l--fA)

B

INCHES

12-

1/2

I

'"'"

C

FT

-LB

TORQUE

70

~.

:::

S

TR

Ar

GH

T

EDGE

.

~:

DRIVEN

CLUTCH

Figure 6

To

Remove

Driven Clutch

10-

3/4

11

-

1/2

11

-1/2

45 45

70

HOLDDOWN

NUTS

VIEWe

NOTE:

The

procedures

required

to

remove

the

driven

clutch

are

the

same

as

those

described

in

paragraph

To

Remove

Variable

-S

peed

Drive

Belt.

8

To

Remove

Brake

Assembly

•

Remove

hood and

headlight

assembly.

Refer

to

Hood

Removal

and

Installation.

Always

disconnect

the

sparkplugwires

before

working

on

the

engine

or

drive

elements.

•

Disconnect

brake

cable

(8,

figure

7)

at

brake

mounting

bracket

(9)

and

at

brake

actuating

lever

(3).

•

Remove

the

two

bolts

and

locknuts

securing

the

mounting

bracket

to

the

driven

clutch

mounting.

•

Remove

the

brake

assembly.

•

Installation

procedures

are

the

reverse

of

re-

moval.

Refer

to

Brake

Adjustment

procedures.

Figure 7

Brake

Adjustment

~

Always

disconnect

spark

plug

wires

before

working

on

the

engine

or

drive

elements.

• To

adjust

the

brake

pads

(5,

figure

7)

to

the

disk

(1),

remove

the

cotter

(2)

and

tighten

or

loosen

the

castle

nut

(4)

as

required

to

permit

the

brake

pads

(5)

to

just

clear

the

brake

disk.

Reinstall

the

cotter

pin. To

adjust

for

excessive

play

in

brake

cable

or

lever

pOSition,

loosen

jam

nuts

(6)

and

move

brake

housing

(7)

as

required.

Tighten

jam

nuts.

c

To

Remove Carburetor-

Mark.

VI

and

Mark.

XX

295 only

(ESj

Always

disconnect

spark

plug

wires

before

working on

the

engine

or

drive

elements.

• Loosen the

throttle

control cable

adjustment

screw

and

release

cable.

On

Mark

VI

only,

re-

lease

throttle

control linkage

at

the

carburetor.

•

Release

the

throttle

extension

spring

and hook

at

the

carburetor

throttle

control

lever

on the

Mark

XX

295 only (s

ee

figure

8).

•

Release

the hose

clamp

and

disconnect

the

im-

pulse

line

at

the

carburetor.

Wipe up any

spilled

gasoline

immediately.

• Rel

ease

the tank

-to-car

buretor

gas

line.

Wipe

up any

spilled

gasoline

immediately.

• Remove the locknuts

securing

the

carburetor

to the

carburetor

adapter

and remove the

car-

buretor.

NOTE:

Do

not

damage

gaskets

when

removing

carburetor.

• In

stal

lation

is

the

reverse

of removal. Adjust

carburetor

as

described

in

Carburetor

Adjustment

procedures.

figure

8

9

ERVICE

AND

REPAIR

To

Remove Carburetor-

Mark.

XX

399 and 439 only

~

Always

disconnect

spark

plug

wires

bef

ore

working on the engine

or

drive

elements.

•

Release

the hose

clamps

and

disconnect

the

tank-to-carburetor

gas

line

(figure

9)

at

the

car-

buretor.

Wipe up any

spilled

gasoline

immediately.

• Remove

th

e locknut

securing

the

throttle

arm

screw

to the

throttle

arm.

figure

9

IMPORTANT:

Before

loosening

th

e

jam

nuts, note

the

space

betweenthebottom

jam

nutandthe

throttle

control

l

ever

.

This

space

must

be

maintained

during

reassembly.

• Loosen the

jam

nuts between the

throttle

arm

and

the

throttle

control

lever

and

remove

th

e

throttle

rod

screw.

• Remove the

jam

nut and

lockwashers

securing

the

car

buretor

to

the intake manifold and

remove

the

carburetor.

•

Installation

is

the

reverse

of

removal

except

that

the

throttle

rod

screw

must

be

insert

edthrough

the

throttle

control

lever

and into the

throttle

arm

SERVICE

AND

REPAIR

I~

sufficiently to

take

up the

play

in

the

throttle

control

lever.

• Adjust

carburetor

as

described

in

carburetor

adjustment

procedures.

Carburetor Adjustment

When adjusting the

carburetor,

best

results

will

be

obtained

if

the

adjustments

are

made on a

warm

engine. During

carburetor

adjustments,

DO

NOT

FORCE ADJUSTMENT SCREWS INTO SEATS.

• TO ADJUST CARBURETOR -Close the high-

speed

jet

as

shown

in

figure

10

(DO

NOT

FORCE).

Then open

as

indicated

in

the

carburetor

adjustment

chart,

figure

11

for

the

particular

model

Ski-

Daddler.

•

Turn

the

low

speed

jet

(idle-mixture

screw)

as

shown

in

figure

10

all

theway

in

(DO

NOT FORCE),

then open

as

indicated

in

figure

11

for

the

particular

model

sled.

This

adjustment

controls

the

mixture

at

idling

speeds.

A

lean

idle

mixture

will

result

in

poor

acceleration.

Keep the

idle

speed

slower

than the clutchengaging

speed

'by adjustingthe

idle-speed

screw.

NOTE:

Do

not

use

the

low-speed

jet

to

adjust

for

idle

speed.

Throttle Plate Adjustment,

HD

Carburetor

Figure

8 shows the

throttle-wire

adjustment

screw

used

on

all

Mark

VI

and

Mark

XX

295

series

sleds.

If

the

throttle

plate

fails

to open completely when

the

throttle

control

lever

is

depressed,

loosen

the

throttle-wire

adjustment

screw

and

readjust

the

wire

as

required

to fully open the

throttle.

SKI-DADDLER

MODEL

CARBURETOR

MKVI

Tillotson

HD

Carburetor

MK

XX

399 and

439

Tillotson

HR

Carburetor

MK

XX

295

Tillotson

HD

Carburetor

Throttle Plate Adjustment,

HR

Carburetor

Set the choke

controls

(figure

10)

tooff-choke

posi-

tion.

This

will

permit

inspection

of the

throttle

control

plate

located

inside

the

carburetor.

Check

to

ensure

that

both

throttle

plates

are

in

the

fully

open position when the

throttle

control

is

de-

pressed.

To

adjust

the

throttle

control

plate,

pro-

ceed

as

follows:

• Loosen the locknut and

jam

nut

securing

the

throttle

rod

screw

to the

throttle

arm.

Figure

JO

CARBURETOR

ADJUSTMENT

HIGH-SPEED

JET

LOW-SPEED

JET

(TURNS)

1-1/8

:

~/8

Open

1-1/8

+

1/8

Open

- 0

2-1/4

+

1/4

Open

- 0

1-1/4

+

1/8

Open

- 0

1-1/8

+

1/8

Open

- 0

3/4

:

~/8

Open

Figure JJ

JO

)

AMF 1970 SKI-DADDLER SD15M21 A Quick start guide

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