Lukas ZPH 3 - Manual (Page 5)

5
8.3 Venting the cylinder
Connect the cylinder with the pump. Extend the piston by half its stroke and turn the cylinder so
that the piston is facing downwards. The highest point of the cylinder must be on a lower level
than the pump. Fully extend the piston and retract again so that eventual air bubbles can escape
into the oil container of the pump.
Remark:
The oil filler cap of the pump must be open during bleeding.
9 Operation of one double-acting cylinder
- fully close the hand wheel (1) by turning it clockwise
- switch the hand lever on the 4/2-way (7) valve to position A or B
(extension or retraction).
- activate the cylinder by operating the pump lever. Observe safety
remarks as per para 11.1 !
10 Operation of two double-acting cylinders
- fully close the hand wheel (1) of the hand pump and the
hand wheels (9) on the block 2D by turning it clockwise
- switch the hand lever on the 4/2-way (7) valve to position A or B
(extension or retraction).
- To effect extension resp. retraction of one or both cylinders switch
the hand lever on the 4/2-way (7) valve to position A or B . A synchronism
of both cylinders can be achieved by different opening / closing of the hand wheels.
Observe safety remarks as per para 11.1 !
for Pos. 9 and 10:
The 4/2-way valve (N4/2W) itself does not have such a function.
Load can be sustained when the hand wheel (1) is fully closed. The lever of the N4/2W valve must
thereby stay in position „extending“.
11 Lifting a load
11.1 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". Always keep your body to the side of the
pump, away from the line of force of the handle.
Note
To reduce handle effort at high pressure, take short strokes. Maximum leverage is obtained in the
last 5 degrees of stroke.
11.2 Observe „Safety measures prior to and during lifting“ as per separate operating
manual of your LUKAS cylinder.
12 Lowering a load (pressure release)
12.1 Open the oil filling cap (4) on the reservoir a few turns
12.1.1 To retract the piston of the cylinder, open the drain valve of the pump carefully (..1D resp.
on the block ..2D) (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.