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Troubleshooting (Manifold)
Failure
Check the failure seen on the manifold
referring
to
the
following,
and
take
appropriate measure.
Cause
Remedy
Leakage
1. Any of the OUT,
R E T U R N
and leak
detecting port has a leakage.
Troubleshooting (valve): Refer to 1
through 4 for
leakage
.
2. Between the manifold blocks has a
leakage.
1) Insufficient tightening or
looseness of manifold tie-rod
Insufficient tightening of the manifold
tie-rod lost the sealing capability
between the manifold blocks and
allowed the leakage to happen there.
Tighten the hexagon socket head
bolt for the tie-rod at the specified
torque.
(Specified torque P20:
3.5+/-0.5Nm)
2)The permanent deformation
compressed of O-ring (material:
special FKM)
The permanent deformation
compressed is large due to the
characteristics of the O-ring, so the
compression is reduced, leading to
leakage of fluid from the between the
manifold.
- Replace the O-ring with new one.
(Maintenance pats list P20)
3. Between the port block and manifold block
has a leakage.
1) Insufficient tightening or
looseness of port block mounting
screw
Insufficient tightening of the port block
mounting screw lost the sealing
capability between the port block and
manifold
block
and
allowed
the
leakage to happen there.
Tighten
the
round
head
combination screw for the port
block at the specified torque.
(Specified torque P20:
1.2+/-0.2Nm)
2)The permanent deformation
compressed of O-ring (material:
special FKM)
The permanent deformation
compressed is large due to the
characteristics of the O-ring, so the
compression is reduced, leading to
leakage of fluid from the between the
port block.
- Replace the O-ring with new one.
(Maintenance pats list P21)
The permanent deformation compressed of the VCC series O-ring is large due to the property of the material
(special FKM). Therefore, leakage may occur if the O-ring is not replaced when disassembling and
reassembling the product.
Please replace the O-ring with a new one when disassembling and reassembling the parts.
Troubleshooting (Fitting)
Failure
Check the failure seen on the fitting referring
to the following, and take appropriate
measure.
Cause
Remedy
Leakage
1. The joint part between the tube and fitting
has a leakage.
1)
Insufficient
tightening
or
looseness of union nut
Insufficient tightening of the fitting
union nut caused the sealing failure
between the fitting and tube and
leakage between them.
Tighten the union nut 1.5 to 2 turns
further after manual tightening.
(Tighten 1.5 to 2 turns further after
manual tightening P6 and specific
product precautions P14)
2. Between the fitting and manifold has a
leakage.
1)
Insufficient
tightening
or
looseness of fitting
Insufficient tightening of the fitting lost
the sealing capability between the
manifold blocks and allowed the
leakage to happen there.
Tighten the fitting at the specified
torque.
(Specified torque P14:
10+/-1Nm)
26
Check the part leaking air.
2021-06-10 14:35
DG018865