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63
180R9270 / IOM APP S 674 - v01 / 03.2013
Instruction
Trouble shooting guide for APP and APP S 674 pumps
2
03.2013
Trouble shooting fish bone chart
1.
No flow/no pressure
2.
Reduced flow/reduced pressure
3.
High torque on electric motor
4.
Noise from pump
5.
Noise from installation
6.
Typical signs of wear
6.1
Valve plate
6.2
Port plate
6.3
Swash plate
Table of Contents
Trouble shooting guide for
APP and APP S 674 pumps
Instruction
Trouble shooting guide for APP and APP S 674 pumps
3
03.2013
Trouble shooting
fish bone chart
1.
N
o fl
ow
/p
re
ssu
re
3. H
ig
h t
or
qu
e o
n e
l. m
ot
or
4. N
oi
se f
ro
m p
um
p
5.
N
ois
e f
ro
m
ins
ta
lla
tio
n
2. R
edu
ce
d fl
ow
/p
re
ss
ur
e
1.
1 D
ry r
un
ni
ng
1.
2 P
ump
re
ve
rs
in
g
1.
3 N
o r
ot
at
io
n o
f e
le
ct
ri
c m
ot
or
1.
4 N
o r
ot
at
io
n o
f p
um
p
1.
5 A
xi
al f
or
ce o
n p
um
p s
ha
ft
1.
6 P
um
p da
mag
e
2.
1.
5 Pr
e-t
re
at
m
en
t
2.
1.
8 M
ain
filt
ra
tio
n
2.1
W
ea
r i
n p
um
p
(in
te
rnal
le
ak
ag
e)
2.
1.
9 T
yp
e o
f fl
ui
d
2.
1.
11
H
ig
h flui
d t
emp
era
tur
e
4.
1 A
ir
in
flui
d
4.
2 B
le
ed
ing
c
ond
it
ion
s of
pu
m
p
4.
3
M
in
/m
ax
n
ominal
inl
et
p
res
su
re
4.
4 P
um
p r
ev
er
si
ng
4.
5 H
ig
h r
ot
at
io
n s
pe
ed (
RP
M
)
4.
6 O
utl
et
p
res
sure
5.1
In
le
t/
ou
tle
t c
on
ne
ct
ion
s
(h
os
es
/p
ip
es
)
5.
2
Le
ngt
h/
di
m
en
si
on
s of
inl
et
/o
ut
le
t l
in
e
5.
3 Ho
se
st
iffn
es
s
5.
4
H
os
es
/p
ip
es
m
ou
nt
ed
di
re
ctl
y o
n f
ra
m
e
5.
5
V
ib
ra
ti
on d
am
pe
r u
nd
er t
he
el
ec
tric
m
ot
or
3.1
T
oo
h
igh
o
utl
et
p
re
ss
ure
from
pu
m
p
3.
3 C
on
st
an
t t
orq
ue
3.
4 W
at
er p
um
p d
am
ag
e
4.
7 S
of
t s
ta
rt
/s
to
p
PU
M
P F
AI
LE
D
3.
2 P
um
p s
ta
rt
s aga
in
st
p
re
ss
ure
2.
2 Lo
w
in
le
t p
re
ss
ure
2.
3 R
PM