48
C
orrec
ti
on
s
23.1
Ha
ve
a
t
ec
hnicia
n
re
pla
ce
the mult
i-
purpo
se
va
lve.
24.1
Ha
ve
a
t
ec
hnicia
n
re
pla
ce
the mult
i-
purpo
se
va
lve.
25.1
P
lac
e one
drop
o
f oil be
twe
en the silver
knob a
nd the gla
ss of th
e
ga
uge
. Tur
n the
knob ba
ck a
nd
for
th t
o w
ork the
oil
onto
the inter
na
l shaf
t.
25.2
U
se
a
small
sc
re
wdr
ive
r to a
djust
the
small s
cre
w in the c
enter
of the
sil
ve
r
knob.
26.1
Ha
ve
a
t
ec
hnicia
n
re
pla
ce
the tim
er.
27.1
Ha
ve
a
t
ec
hnicia
n
re
pla
ce
the tim
er.
27.2
Timer
must
be
turne
d pa
st 10 m
inut
es to
se
t hammer
.
28.1
F
oll
ow the
inst
ruc
ti
ons i
n
se
c
7
.5.
29.1
F
oll
o
w inst
ruc
ti
ons i
n se
c
7
30.1
Ma
ke
sure
p
re
ssur
e ga
ug
e re
ads 0 psi
,
and
then pull on t
he
ring of
the sa
fe
ty v
alve.
This wil
l re
li
eve
the va
cu
um i
n th
e
cha
mber
.
Possi
ble Cau
se
C
h
ec
ku
p
an
d Te
sts
23.1
The
int
erna
l spring i
n the
mul
ti
-pu
rpose
va
lve ha
s bro
k
en.
24.1
P
oor ma
int
ena
nc
e will
r
esult
in t
he
mul
ti
-
purpo
se
va
lve binding.
25.1
No lubr
ica
ti
on on the ne
edle sha
ft.
25.2
Inte
rna
l
spring is
too
ti
ght
.
26.1
Inte
rna
l ge
aring h
as wo
rn down.
27.1
The
ha
mm
er on the
ti
mer
be
ll
ha
s broke
n
o
ff.
27.2
Timer
wa
s
not t
urne
d f
ar
enough to s
et
ha
mm
er
28.1
De
bris ha
s lodg
ed in t
he
se
at of the
sa
fe
ty
va
lve.
29.1
The
fir
st s
tep is t
o de
ter
mi
ne
if it i
s rust or
dirt.
3
0.1
Unit wa
s lef
t t
o c
ool
with t
he
door
c
losed
and a
va
cuum deve
loped.
S
ympt
om
23.
M
ult
i-
purpo
se
va
lve
turn
s
ba
ckwa
rds.
24.
Mult
i-
purpo
se
va
lve doe
s not
turn.
25.
R
ed tra
cking ne
edle on p
re
ssure
ga
uge
is har
d to s
et.
26.
Timer
doe
s not
ti
me dow
n.
27.
Time
r be
ll
doe
s not
ring.
28.
S
afe
ty valve
is l
ea
king.
29.
Instru
ments a
re
rusting.
30.
D
oor w
il
l not
ope
n,
closi
ng
de
vice
is op
en.
