•••
4
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TROUBLESHOOTING
OU
S OO
G
PROBLEM
POSSIBLE CAUSESS
S
U
C
S
S
O
O
Cylinder will not advance.
Pump release valve open.
Cylinder will not advance.
Pump release valve open.
.
d
e
n
e
t
h
g
it
yl
l
u
f
t
o
n
r
e
l
p
u
o
C
Coupler not fully tightened.
.
w
o
l
si
p
m
u
p
n
i l
e
v
e
l l
i
O
Oil level in pump is low.
Cylinder advances part way.
Oil level in pump is low.
Cylinder advances part way.
Oil level in pump is low.
Cylinder advances in spurts.
Air in hydraulic system.
Cylinder advances in spurts.
Air in hydraulic system.
Cylinder advances slower
than normal.
Leaking connection.
t a o a
ea g co ect o
.
g
n
i
n
o
it
c
n
u
fl
a
m
p
m
u
P
Pump malfunctioning.
Cylinder advances but will
.
g
n
ik
a
e
l
sl
a
e
s
r
e
d
n
il
y
C
.
d
l
o
h
t
o
nnot hold.
Cylinder seals leaking.
.
g
n
i
n
o
it
c
n
u
fl
a
m
p
m
u
P
u p a u ct o g
.
n
o
it
c
e
n
n
o
c
g
n
ik
a
e
L
ea g co ect o
Cylinder leaks oil.
Worn or damaged seals.
Cy de ea s o
o o da aged sea s
.
e
g
a
m
a
d
r
e
d
n
il
y
c
l
a
n
r
e
t
n
I
te a cy de da age
Cylinder will not retract or
retracts slower than normal.
Narrow hose restricting
fl
ow.
retracts slower than normal.
Narrow hose restricting
fl
ow.
.
g
n
ir
p
s
n
o
it
c
a
rt
e
r
k
a
e
w
r
o
n
e
k
o
r
B
Broken or weak retraction spring.
.y
ll
a
n
r
e
t
n
i
d
e
g
a
m
a
d
r
e
d
n
il
y
C
Cy de da aged te a y
Oil leaking from external
relief valve.
Coupler not fully tightened.
T
