REHOBOT CH Series Gebrauchanweisung Seite 10

GB
Thank you for the faith you have shown in us by choosing a
REHOBOT product. REHOBOT stands for products of high quality
and it is our hope that you will be able to use this product for
many years.
To avoid functional disturbances, we recommend that you read
these instructions thoroughly before using the product.
Receiving instructions
Visually inspect all components for shipping damage. Shipping
damage is not covered by warranty. If shipping damage is found,
notify carrier at once. The carrier is responsible for all repair and
replacement costs resulting from damage in shipment.
Read the warnings and instructions to prevent personal injury or
damage to property. Take all appropriate safety precautions and
wear suitable safety equipment, such as gloves, safety glasses,
etc.
REHOBOT AB accepts no liability for injury or the consequences
of using REHOBOT products without taking suitable safety
precautions, using a product or system for the wrong applica-
tion, or through inadequate maintenance. If in any doubt contact
REHOBOT or an authorised REHOBOT dealer.
Technical description
REHOBOT hollow cylinders are available in four different ver-
sions:
CH - Single-acting
CHF - Single- acting with spring return
CHFA - Single- acting with spring return, aluminum
CHD - Double-acting
Information regarding the model type, capacity, maximum work-
ing pressure and serial number is engraved on the cylinder tube,
see Fig. 1.
System construction
Always plan a hydraulic system by choosing products that are
suitable for the task in hand. Check product limitations regarding
pressure range, lifting capacity and compatibility. The maximum
working pressure of the system must not exceed the maximum
working pressure of any product in the system.
We recommend the use of pressure gauges with any hydrau-
lic system to ensure that it is operated within its safe working
range.
Make sure that all hydraulic hoses, connections, etc., are con-
nected to the right connection port (pressure or return port) on
the pump, ram, valve or other hydraulic component.
Applications
Because of its design the hollow cylinder can be used for both
pushing and pulling operations.
REHOBOT Hydraulics AB Skjulstagatan 11 A, 632 29 Eskilstuna, SWEDEN P.O. Box 1107 631 80 Eskilstuna
T. +46 (0)16 - 16 82 00 F. +46 (0)16 - 13 93 16 E. info@rehobot.se W. www.rehobot.se
Pushing operations
Pushing/Lifting
When a hollow cylinder is used as a conventional ram we recom-
mend the use of a solid pressure head (THR). (See under head-
ing Accessories.)
Position the cylinder on or against a solid flat surface before lift-
ing. Never lean over a pressurised cylinder or pump lever. Secure
the load before lifting to make sure that it cannot roll or slip.
•
Never work underneath a raised load without first
securing it with blocks or some other mechanical sup-
port.
•
Never disconnect a cylinder from the pump when the
hydraulic system is under pressure.
Pushing onto shafts (Fig. 2)
When the cylinder is used for applications such as pushing a
bearing (A) onto a shaft (B) it is important that the stop or nut
(C) has as large a surface area as possible so that the force is
spread over the entire base of the cylinder.
• Never stand behind a cylinder when carrying out this
type of work. If the stop or shaft breaks this could
result in injury.
•
Never disconnect a cylinder from the pump when the
hydraulic system is under pressure.
Pulling operations
Pulling operations usually exploit the fact that the cylinder is
hollow.
Fitting (Fig. 3)
A rod (B) is inserted through the object to be pulled (A) and
through the cylinder itself. Stops (C) are fitted to both ends of the
rod (B). A pressure head with threaded hole can be used as a
stop at the piston end.
Removal (Fig. 4)
A rod (B) is inserted through the object to be pulled (A), through
the spacer (D) and through the cylinder itself. Stops (C) are fitted
to both ends of the rod (B). A pressure head with threaded hole
can be used as a stop at the piston end.
•
Never stand in front of or behind a cylinder when carry-
ing out this type of work. If the stop or shaft breaks this
could result in injury.
•
Never disconnect a cylinder from the pump when the
hydraulic system is under pressure.
Uneven loading (Fig. 5)
Make sure the ram supports the load at right angles to the
surface. Avoid uneven loading, i.e. situations where the load is
not carried through the centre of the lifting plate. Uneven loading
puts unäfavourable stresses on the ram and can lead to per-
manent damage. Avoid point loads - spread the load across the
lifting plate whenever possible.