Würth 1952 004 001 Mode D'emploi page 14

Note regarding the modified release mechanism as of
June 2003
When connecting the hoses, be aware of the following basic
functions of the quick couplers (fig 5):
In position X, retract sleeve – plug and socket are uncoupled - the
device is coupled in reverse order. The devices can only be coupled
if the hose lines are depressurized.
The supplied dust caps are used to protect the couplers against dirt.
9.3.2 Screw couplers (system 70 Mpa)
- remove dust caps
- connect nipple SKN 2 on the hose with its female counterpart
SKM 1 on the cylinder.
- turn the threaded sleeve of SKM 1 by hand until it is tightened.
10. Lifting a load, or building up pressure
10.1 Safety remarks as to safe use of the hand pump
Caution!
NEVER add extensions to pump handle.
Extensions cause unstable pump operation.
Warning!
In certain situations the pump handle can "kick
back".
Please ensure that your body does not face the
pump frontally.
Note:
To reduce handle effort at high pressure, take
short strokes. Maximum leverage is obtained in
the last 5 degrees of stroke.
10.2 Observe Safety measures prior to and during lifting" as per
separate operating manual of your cylinder (also refer to the
operating instructions of the cylinder or device being used).
11. Lowering a load (pressure release)
11.1 Open the oil filler cap
11.1.1 To retract the piston of the cylinder, open the drain valve of
the pump carefully (rotation to the left).
Closing the drain valve (rotation to the right) will interrupt
the drain process. By means of fine adjustment of the drain
valve, an extremely precise retraction of the piston of the
cylinder is facilitated
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on the reservoir a few turns
3
11.2 Special function „quick stop" (must be ordered separately)
If you open the drain valve rapidly (rotation to the left), an existent
quickstop only for 50 MPa cylinders StMu61-M (silver) is activated,
i.e. a non-return valve, incorporated in the quick-connect coupling,
will prevent the oil from flowing back. While the hose is at zero
pressure, the cylinder remains under pressure. Pump and cylinder
can now be separated and the pump can be used elsewhere.
The "quickstop" also serves as a safety valve if for some reason the
hose is damaged. The quickstop will in this case prevent the load
from falling.
In order to release the quickstop, the pressure in the cylinder must
be increased with a few pump slaps. This will re-open the non-return
valve in the quick-connect plug StNi 6. The draining can now be
continued.
11.3 Uncoupling pump and cylinder or device
Before uncoupling the pump from the cylinder, make sure (by
opening the drain valve) that there is no pressure and that the piston
is completely retracted or the device has come to rest according to
the operating instructions.
Remount the protection caps after uncoupling in order to avoid
pollution of the coupling parts. Close the oil reservoir filler cap, so
that no oil is spilled during transport.
12. Servicing and Maintenance
For safety reasons, the operating pressure must be checked after
approx. one month. Despite accurate factory settings and testing,
the max. operating pressure that can be achieved can change after
start-up of the device. If there are any deviations from the tolerance
(operating pressure) specified in section 16, either readjust the
pressure valve according to section 4, or contact an authorised
dealer or the customer service.
The first oil change should be carried out after six months upon
completion of a pressure check. If the contact pressure deviates
from the nominal pressure specified in the operating instructions,
the pressure valve must be adjusted by an authorised dealer or the
customer service.
The oil must be changed once per year. In case of frequent use or
operation in particularly dusty environment, oil should be changed
every six months. Further, it is mandatory to clean the oil sieve in the
oil container of the pump each time the oil is changed.