Weifang 495 - Page 116

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fourth

order

maintenance.

The

serVIce

interval

may

be

shortened

or

prolonged

properly

according

to

tile

opera~ing

conditions.

C.

Check

the

wear

condition

of

th~

electtic

brushes

of

model

TS

103,

r:place

the

worn

outOlles.

Check

the,pres~ure·jof

their

springs

with

a

spring

weigher

...

The;

pressure

should

be

within

Q~

9

-~.

3kg.

If

it

iso's

within

this

limit.,the

spring

should

be~replacecJ.

D.

Check

the

wear

cQ;nditions

of

the

pinion,the;~·fro·nti~ov.er,

the

interme·diate

cover

and

tlJ~

bt:Is·hing·:Qn

the

rea,~''j~ov~r

fJ;epalce

them

if

they

are.

worn

out

ba'dly.

E.

Test

the

insulation.s

between.

the

armatur.e·

(indthe

..

'"shaft,

the

m.ageI).tic

pole

coil

and

the

housing

as'\vell.as

the:.br'Ushjn,s~la

tion

frame

and

the

rear

cover

with

a

multimeter.

F .

Check

the

attraction

force

of

the

magnetic

.,switchwith

the

storage

battery

·

If

the

attraction.

force

is

weak

but.thesoldering

connection

on

the

copper

sheet-is

s,t,ill

perfect

,the

magnetic

s.witch

should

be

sent

to

the

service

shop

for

remedy

orren·e.w.lf

its

con-

tact

found

poor

in

the

course

of

use

,~hem

melt

away.the.~oldering

tin

on

the

copper

sheet

of

the

bakelite

casing,

t~rn

.

off

the

..

tw

o

bolts

and

take

down

the

bake'lite

casing

to ,check

and

polis.h,the

contacts

with

No.

0

sandpaper

(the

spring

inside

the·bakelitercas-

ing

should

be

cared

during

reassembling

the

switch).

81

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