PARMA-TECHNIK MIKRON III A - 12.2 Ignition Magnetos Repairs, Disassembly and Assembly

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32

MIKRON

III

A

ANNEX

2

12.2

Ignition

Magnetos

Repairs,

Disassembly

and

Assembly

The

Maintenance

organizations

and

Personell

without

special

Authorization

may

carry

out

the

minor

maintenance

of

that

part

of

the

Ignition

Magneto,

covered

by

the

detachable

cover

of

the

distributor,

The

cover

and

the

distributor

space

may

be

cleaned,

the

cover,

the

central

brush,

the

contact

finger

and

contacts

of

the

distributor

checked

for

cracks,

wear

and

damage.

The

damaged

parts

may

be

replaced,

the

moderately

worn/burned

contacts

may

be

grinded-in

and

adjusted

on

the

determined

clearance.

The

Major

Maintenance

of

the

Ignition

Magnetos

is

limited

to

the

Engine

Manufacturer

or

specially

authorised

Maintenance

Organization.

Magneto

is

removed

from

the

engine

after

disconnection

of

the

ignition

cables

and

releasing

the

fastening

sleeve.

The

nut,

fastening

the

magneto

drive

insert,

is

released

and

the

whole

assembly

of

the

magneto

including

the

insert

and

bevel

gear

is

removed

and

haded-over

for

the

necessary

maintenece.

The

required

play

in

the

-bevel

gear

drive

is

determined

by

the

distance

between

the

bevel

gear

and

the

insert

and

must

be

adjusted

by

the

magneto

maintenance

organization.

The

Magneto

Reassembly

and

Timing

Adjustment

Adjust

the

crankshaft

to

the

upper

compression

stroke

of

the

cylinder

No 1

(i.e.

the

"valve

shear"

on

the

No 4

cylinder).

The

divider

finger

is

adjusted

to

the

ignition

point

of

the

cylinder

No 1

according

to

the

marking

on

the

divider

cover.

Check

the

clearance

in

the

magnetic

drive

gearing

as

follows.

Insert

the

magnetos

without

the

sealing

in

such

a

way

so

that

the

line

connecting

the

magneto

axis

and

the

IIshort-circuiting"

terminal

includes

at

the

ignition

spark

point

an

angle

within

20-30

degrees

with

the

logitudinal

axis

of

the

engine.

In

this

position,

tighten

slightly

the

nuts

fastening

the

engine.

If

the

drive

gearings

of

the

magnetos

bear

on

each

other

and

there

is

a

gap

between

the

bearing

surface

of

the

magneto

drive

insert

and

the

bearing

surface

the

crankcase

measure

its

width

using

a

feeler

gauge.

.

Depending

on

the

gap

width,

select

1,2

or

3

sealings

so

that

the

total

width

of

the

sealing

(one

sealing

0.3

mm)

would

be

by

0.2

bigger

as

minimum.

Remove

the

magneto,

put

in

the

determined

number

of

sealings

and

mount

it

back

in

the

same

position.

When

assembled,

tighten

it.

NOTE:

·In

case

of

SCINTILLA

magnetos

the

one

provided

with

the

impulse

coupling

(the

longer

one)

is

installed

on

the

engine

right

side.

Issued

9/95

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