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Bulletin HY07-1110-T/UK

Series 2H, 3L, HMI & HMD

Operating Instructions

Hydraulic Cylinders

Hydraulic Cylinder Operating Instructions

Fitting and commissioning is to be carried out by qualified
personnel only, in accordance with the operating instructions.

1. Mounting and connections

1.1 Mounting of actuator depends on the options selected:

– Flange

– Pivot

– Foot

1.2 Hydraulic ports are in each end cap.

1.3 Connecting the load: use the mounting thread on the piston

rod.

1.4 Cushion adjusting screws are fitted in the head and/or cap,

where specified.

1.5 Air bleed screws are fitted in the head and/or cap, where

specified.

1.6 Stroke adjusters are fitted in end caps, where specified.

1.7 Electrical connector for transducer, where specified.

2. Function

Pressurized fluid is applied to a circular piston inside a cylinder
which pushes the rod. This action moves the piston generating
linear motion. This linear motion and force is transmitted to the
application by the rod. Where specified, the sensor provides

a signal which indicates stroke position. This signal may be
analogue or digital.

3. General conditions of use

These general recommendations for the correct and safe use of
the product must be observed at all times:

– Comply with the limits specified in the catalogue.

– Ensure the hydraulic fluid supplied meets the specified
cleanliness level.

– Ensure the correct seal class has been specified for the
hydraulic fluid used.

– Ensure that the actuator is suitable for the prevailing
ambient conditions.

– Comply with the national and local safety laws and
regulations.

– Remove all transport packaging. All packaging material
used is recyclable.

– Maintain the fluid specified for the complete service life of
the product.

4. Installation

Mechanical

– Check that the cylinder model code meets the
specification required.

– Handle the cylinder with care in order to prevent damage
to the cylinder tube and piston rod which could reduce
reliability and safe operation.

– Mount the cylinder so that all control elements are always
accessible.

– Mount the cylinder so that there is no misalignment
between the rod and its mating fitting.

– Tighten screws, lock nuts and accessories to the torques
specified in the maintenance manual.

Hydraulic

– Tube and hose fittings are to be screwed directly into the
pressure ports of the cylinder end caps.

– Fill the cylinder slowly in order to prevent uncontrolled
movements.

Electric

If a sensor is fitted, ensure that the cable is not energized when
attaching the cable to the sensor connector.

5. Commissioning

Complete System

Slowly fill the complete hydraulic system with oil in order to
prevent any uncontrolled movements. During the filling
operation, the system and/or cylinder must be bled of air at
suitable points.

Hydraulic Cylinder

– Make sure that the area traversed by the rod and attached
mass is clear of personnel or any obstructing bodies.

– Start a test run.

– If necessary adjust the cushion screw to achieve optimal
performance. The purpose of the cushion adjustment is to
ensure that the cylinder achieves full stroke without striking
the cap too hard.

– If fitted, use the stroke adjusters to achieve the stroke
required. It is recommended that hydraulic pressure should
be released before making adjustments.

–

CAUTION

: During all adjustments ensure that the

operator is clear of the area traversed by the moving mass.

6. Operation

6.1 Make sure that the area traversed by the moving mass is

clear of personnel or any obstructing bodies. Only handle
the cylinder when all movement has ceased.

6.2 Ensure that the oil and ambient temperature is within the

temperature range of the cylinder fitted.

6.3 Make sure that the pressure indicated on the model plate is

not exceeded.

7. Maintenance