NSU Supermax - Lubrication, Carburettor, and Electrical Systems

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Lubrication

of

the Engine

is

by

means

of

the

dry-sump system.

In

this system

the

double

gear

pump

comprises

a

scaven-

ging

and

a

pressure

pump. The

scavenging

pump

has

a

higher

capacity

than

the

pressure

pump

so

that

the

oil

returning from

the

points

of

lubrication

cannot

accumulate

at

the

pump,

but

is

returned

to

the

oil

tank.

The oil passes

through

a filter

on

its

way

from

the

tank

to

the

pressure

pump,

where

it

recommences

its cycle.

The oil

for

lubricating the crankshaft

is

forced

by

the

pump

through

passqges

drilled

in

the

left-hand

crank-

shaft,

the

left-hand

flywheel,

and

the

crank

pin,

to

the

big-end

bearing.

The cylinder

walls

and

the

gearbox

are

lubricated

by

oil

thrown

off

from

the

crankshaft

assembly.

For lubricating the valve mechanism

passages

are

pro-

vided

in

the

crankcase,

cylinder,

and

cylinder

head

which

lead

the

oil directly

to

the

individual

lubrication

points.

The

dipstick

in

the

oil

tank

is

provided

with two notches

the

cap

of

the

oil tank.

-The return flow

of

the

oil

can

be

observed

by removing

which

indicate

the maximum

and

minimum oil levels.

Breathing

The

pressure

built up

in

the

crankcase

when

the

'piston

descends

is

relieved

through

passages

drilled

in

the

right-

hand

crankshaft

and

in

the

crankcase

leading

to

the

rear

of

the

engine.

The Carburettor

is

a Bing

two-slide

ca~burettor.

The

control

cables

that

operate the carburettor

are

ad-

justed

.at

the

twist

grip

and

the

air

control lever

on

the

right

hand

side

of

the

handlebars.

The wet

air

filter

is

so

arranged

that

the

air

IS

drawn

in

from

the

frame

and

enters

the

filter

10

a

steady

stream

i

there

is

practically

no suction noise.

I

13

1-

12

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