Allis-Chalmers LA-1600, Instruction Book

Page: 68 / 100

I
I
I
I
a .
RACK I NG
ORAWOUT AND L I FT I NG BAR Cu b
i c l
e
-
m
o
u
n t e
d
b reakers of the d rawout t y pe I nc
I
ude
as
I
n
t
e
g ra
I
p a r
t
s t he
m
e
cha
n
l
sm
to
..
rack the breake r
I n and
out of
the cub i c l e
c
om
par
t
m
en
t
,
t he
d
rawo
u t
t
r i p
i n t e r l ock and the d rawout pos i t i on ma rk i ngs .
'
·
Ref e r to F i gure
4 .
L i
f
t i n
g
ba r (40 1 )
may
be used t o 1 1 f t the b r e a k e r wh e n
i t i s be i n g I ns e r ted I n
the cub i c l e�
'
W i th the
b r
ea ker I n pos i t i o n on the ra l l s . the fo l l ow i n g s equence s hou l d be
us ed to rack
the breake r I n to
the fu l l y
connec ted pos i t i on ,
ON E LECTR I CALLY-OPERATED BREAKERS , BE C ERTA I N THAT THE CONTROL
SW I TCH
ON
THE FRONT OF THE BREAKER I S
I N
THE "OFF" POS I T I ON .
1 .
Lower
t
h
e I n t e r l oc k s l i de
(402) to
e
xp
os
e
rack i ng
s
c r
ew
(404) .
(
lowe r i ng the I n ter l ock s l i de w i l l a c t
u
a t e t r i p r od (4o6) t o t r i p
a
c l os ed b reake r .) Wh i l e
the I n te r l oc k s l i de I s I n
t h i s pos i t i on ,
the
b
r
e
a k
e
r
I s
11t r l p-f ree" and cannot
be
c l os e;d .
2 .
W i t h t he swi t ch gea r ope ra t i ng c rank . rota te rack i ng
s
c
r
e w (404) to
move rack i ng c l ev i s es (405) to the p o
s
i t i o n s hown where t hey w i l l
engage
w
i
th f i xed p i ns (403)
I n the c
u
b
i c l e .
) . The b
r
e
a
k
e
r s hou l d now
be pus hed a l ong the
ra l l s t o the "D I S CONNECTED"
pos i t i on . A t the s ame t i me the rack i ng c l ev i s es (405 ) s ho
u
l d
be
checked to see tha t they a re I n cor rect a l l g n
�
en t w i th cub i c l e f i xed
p i ns (403 ) .
Counterc l ockw i s e rota t i on of
the
ope ra t i ng c rank w i l l now rack th
e
b reake r I n to
the ' 'TEST''
Jt nd conne c t e d pos i t i ons . At the
' 'TE ST"
a n
d
connec ted pos i t i ons , I n t e r l ock (408) i s I n I ts n or m a l hor i zon ta l
pos i t i on . By remov i ng op
e r
a t
i
n
g c ra n k
and t hen ra i s i ng I n t e r l ock
s l i de
(402) . t r i p rod (406)
ret
u
r
n
s
to
the ex tended pos i t i on
p
e r
m
i
t
t
i n g
t r i p 5 ha f t (407) to
res e t and the
b reake r may
be
ope ra t ed ,
Be tween
' 'T EST 1 1
a n
d connec ted pos i t i ons , the c u
b i
c l
e
I n t e r l oc k cam
(409) ra i s es i n t e r l oc k (408) to ho l d t r i p rod . (406)
and t r i p
s ha f t
(407) I n
the 1 1
t r i p
•
f
r e e
1
1 pos i t i on s o
tha t the ,breake r ca
nn
o
t
be
c l
o s e
d even
i f
I n t
e
r l ock s l i de (4o2) I s ra i sed ,
Th i s I s
to
p revent
movemen t of
a c l os ed b reake r l � to
o r
ou t of
· t
�
e connected
p
o
s i t i
o n
.
4 .
To
w
i
thdr
a
w
the
b reake r f rom
the connec t ed pos i t i on , the p
r
o
c
e d
u
re
J s
the 5 ame
except th
a
t the d i rec t i on of
r
o
t
a
t
i
o
n of th
e ope ra t i ng
cra n k 1 5 c l ockw i s e .
CAUT I ON : T O AVO I D DAMAGE TO THE RACK I NG MECHAN I SM , D O NOT R OTATE
THE
OPERAT I NG CRANK I N THE COUNTERCLOCKW I S E D I RECT I ON
AFTER THE BREAKER HAS REACHED THE FULLY CONNECTED
POS I T I ON.
:
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