Troubleshooting - Eaton Vickers TZ Series Installation & Service Manual

Troubleshooting

Most problems in fluid power circuits
result in a gradual or sudden loss of
power in the work cylinders, which may
cause them to stall or move slower than
required. This chart assumes that all
other components of the circuit such as
the pump, relief valve, control valves,
Check Cylinder for Caused By:
Evidence of:
Side load due to misalignment between cylinder
Excessive wear on
and load.
piston rod.
Pivot mount cylinder without proper stop tubing.
Exceptionally dirty environment.
Contamination in
cylinder. y
Worn rod wiper.
Lack of, or improperly adjusted cushions.
Impact damage or g
broken parts. b k t
Load and piston speed combination exceeds
cylinder cushion capacity.
Lack of, or improperly adjusted speed controls.
Excessive system pressure.
System pressure in excess of cylinder rating.
Permanent deformation
or damaged static g
seals. l
High pressure developed in cylinder cushion.
Cyl. externally loaded while control valve is closed. Reduce load magnitude or resize cylinder.
Seal damage such as Excessive temperature in environment or
loss of elasticity, shape, y, , system.
etc. t
Incompatible hydraulic fluid.
Cylinder stored in horizontal position for
extended period.
Table 1.
hydraulic supply, etc. have been
checked and the problem has been
isolated to the cylinder.
Properly installed and maintained
cylinders should function for millions of
cycles. Premature cylinder failures are
usually caused by system or application
problems that can be prevented. The
purpose of this chart is to aid in identifying
and correcting the most common causes
of premature cylinder failure.
Action Required:
Check alignment of rod with load connection at
all points in stroke.
Follow Vickers cylinder catalog design
recommendations.
Clean and flush the entire system, deburr
connections.
Shield piston rod area from direct contact with
contaminant.
Reference adjustment instructions in this manual.
Consult your VIckers Sales Engineer.
Add or adjust flow controls to reduce piston speed.
Reduce pressure to minimum required to move
the load.
Follow Vickers cylinder catalog design
recommendations.
Consult your VIckers Sales Engineer.
Install replacement sealing system with proper
rating.
Refer to Vickers cylinder catalog for compatible
sealing system.
Replace seals, store vertically with rod up.
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