Maintenance And Service - Enerpac TR Serie Manual De Instrucciones

5.0 OPERATION
IMPORTANT: It is mandatory that the operator has a full
understanding of all instructions, safety regulations, cautions and
warnings, before starting to operate the cylinder and its related
hydraulic components. In case of doubt, contact Enerpac.
Note: Always refer to the operating instructions included with
your pump and valve when operating the cylinder.
5.1 Advancing and Retracting the Cylinder
All TR Series cylinders are double-acting and are powered in
both directions by the pump. Use a pump with a 4-way valve
and two hoses. After making hydraulic connections:
To advance the cylinder, shift the valve on the pump to the
advance position and run the pump.
To retract the cylinder, shift the valve to the retract position and
allow the cylinder to retract.
5.2 Air Removal
To remove trapped air, place the cylinder on its side, with the
hydraulic fi ttings facing UP.
Advance and retract the cylinder several times, avoiding pressure
build-up. Air removal is complete when the cylinder motion is
smooth in both directions.
Note: Bleeder ports are available as an optional accessory for
applications where the cylinder is mounted at the high point of
the circuit or where the cylinder does not complete a full stroke
during its normal cycle.
Problem
External Leakage
Cylinder Misalignment
Contamination of the Piston Rod
Bad Mountings
Damaged Piston Rod
Internal Leakage
Creeping Cylinder
Erratic or Sluggish Operation
Troubleshooting Guide - Enerpac TR Series Cylinders
If leakage occurs between the end cap and barrel, check tie rod torque. If the torque is correct, then replace
the barrel seal. When leakage occurs in the rod bushing area, the rod seals should be replaced. If leakage
continues or re-occurs during a short period of operation, check the cylinder barrel, end caps and rod
bushing for damage.
Sideloading is a common problem which occurs when the cylinder application does not allow the piston rod
to work in-line during the extend and retract motions of the cylinder. Evidence of this condition is frequent
seal failure, bushing wear or galling of the piston rod. In some cases, bending of the piston rod or complete
failure (breakage) of the rod will occur.
Dirt and other material is often picked up when the piston rod is extended. When the rod is retracted in an
excessively dirty application, the dirt is often carried back into the rod seal cavity of the cylinder, causing
damage to the seals. With a slight modifi cation of the cylinder rod end, a rod boot can be added to protect
the rod bushing and seals for most applications.
Due to the wear of pivot pins or mounting bolts working loose, a cylinder may have sideload, even
though the rod was in-line when the cylinder was fi rst installed. All cylinder mountings should be checked
periodically.
An extended piston rod can be damaged by the impact of a hard object which could burr the rod. If this
occurs, the rod should be checked immediately to prevent seal damage.
Inside the cylinder, leakage past the piston seals can cause sluggish movement or setting of the cylinder
under load conditions. This occurs due to leakage of worn piston seals or rings.
When a cylinder creeps while stopped in mid-stroke, check for internal leakage. Creeping can also be
caused by a worn control valve. The control valve should also be checked, even if the cylinder is found to
have internal leakage.
Erratic or sluggish cylinder operation may be caused by a number of problems. The most common cause of
sluggish operation is air in the system. Internal cylinder leakage may also be the problem. If the system starts
out sluggishly but later speeds-up as the oil warms-up, the oil viscosity may be too high. The entire system
should be checked for worn components if the cylinder still operates in a sluggish manner after making
these checks.

6.0 MAINTENANCE AND SERVICE

Maintenance is required when wear or leakage is
noticed. Periodically inspect all components to detect
any problem requiring service and maintenance.
• Replace damaged parts immediately.
• Do not exceed oil temperature above 60˚C [140˚F].
• Keep all hydraulic components clean.
• Periodically check the hydraulic system for loose connections
and leaks.
• Change hydraulic oil in your system regularly.
Refer to Enerpac Repair Parts Sheet L2762 for cylinder seal
replacement and general maintenance instructions.
IMPORTANT: Hydraulic equipment must only be serviced by
a qualifi ed hydraulic technician. For repair service, contact the
Authorized Enerpac Service Center in your area.
7.0 STORAGE
Cylinders are often delivered before the user is prepared to install
them and must be stored for a period of time. When storage is
required, the following items should be observed:
• Select an indoor area for storage, which has a dry and non-
corrosive atmosphere. Take caution to protect the cylinder
from both internal and external corrosion.
• Cylinders to be stored should be kept in a vertical position
(piston rod up) whenever possible.
• Port protector plugs should be kept in the cylinder ports until
the time of installation.
Cause(s) and Solution(s)
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