Yamaha 440 Service Manual download pdf (Page 26)

1980 SRX440

CHAPTER

3.

COOLING

SYSTEM

3-1.

COOLANT

A.

Coolant

level

WARNING:-----------.

Do

not

remove

the

rdiator

cap

when

the

engine

and

radiator

are

hot.

Check

the

coolant

level in the reservoir

tank

when

the engine is cold.

If

the

reservoir

tank

level is

low.

add coolant.

(Refer to D. Replenishing coolant).

1. Reservoir

tank

B.

Coolant

type

The

coolant

is a

mixture

of

tap

water

and an-

tifreeze. You

may

use an antifreeze sold in

the

market.

but

the

coolant

should

be pre-

pared by

taking

into

account

the relation be-

tween

the

mixing

ratio and freezing point.

Cooling

system

capacity:

2500

em'

When

the

mixing

ratio

of

tap

water

to

an-

tifreeze is 1 1

(50%

water

50%

antifreeze).

the freezing

point

is

-40°C

(-40°

F).

This

mixture

can be used in

almost

all

snowmobile

conditions.

CAUTION:----------.

1) In an

area

where

the

temperature

is

below

-40°C

(-40°F),

the

water-

jantifreze

mixing

ratio

should

be

2 :

3

(40%

water

60%

antifreeze).

2)

Do

not

use

water

containing

im-

pu

rities

0 r oi I.

3-2

C.

Draining

coolant

1.

When

the

coolant

is still

hot,

slowly

loosen the radiator cap to

lower

the

pressure in the radiator. Take care

not

to

allow

the

coolant

to

spout

out.

2. Remove the drain

bolt

on

the

exhaust

side

of

the cylinder, and let it run

into

a

container so

that

the

cylinder

head and

cylinder

water

jackets

and radiator are

completely

drained off.

Drain

bolt

tightening

torque:

30

Nm

(3.0

m-kg)

3. The

coolant

in

the

heat

exchanger

and

water

pump

located

below

the drain

bolt

should be drained. To

drain.

remove

the

by-pass pipe secured to the

thermostat

housing by

the

clip,

and hold

the by-pass pipe end

facing

downward.

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