Enerpac GBJ Serie Manual De Instrucciones página 4

5. Continue operating the pump handle as required to
raise load to the desired height.
6. Model GBJ100 only: After load is partially raised and
pumping effort noticeably increases, move the pump
handle to the high pressure pump. Continue pumping
until the load is raised to the desired height.
Model GBJ100 is equipped with
a pressure gauge calibrated to indicate the
approximate weight being lifted. STOP pumping
immediately if the gauge reading exceeds 100 metric
tonnes [981 kN]. The jack is not designed to lift loads
greater than 100 metric tonnes (110 short tons).
7. Immediately after lifting is completed, support the
load with jack stands of the appropriate weight rating.
5.3 Lowering the Load
1. Operate pump handle one or two strokes, so that
the load is raised off of the jack stands. Remove jack
stands from under the load.
Turn the release valve slowly in
the following step. If release valve is opened too
quickly, the object being lowered may drop suddenly,
possibly causing the jack to become dislodged from
beneath the load. Serious personal injury and/or
property damage could result.
CAUTION
Avoid "shock loads" created by
quickly opening and closing the release valve as load
is being lowered. Shock loads may overload the
jack's hydraulic circuit and damage the jack.
2. Using end of pump handle, slowly turn the release
valve stem counter-clockwise until the valve opens
and the ram begins to retract (do not turn more than
two revolutions). Allow the ram to continue
until the load is fully lowered.
3. Remove jack from the lifting area.
4. Press down on the ram to return it to the fully retracted
position. Turn the extension screw (if equipped) all
the way down so that threads are fully recessed and
protected from damage.
5.4 Horizontal Operation
When operated horizontally, the jack must be oriented
so that the pump is positioned down - closest to the
ground. The jack will not operate properly if the pump
is positioned up. See Fig. 4 for allowable horizontal
operating positions.
Support
horizontal operation using a hoist and sling (or other
suitable lifting device). This precaution is applicable
to all jack models, but especially important when
using larger, heavier jacks. Death or serious personal
injury can result if an unsupported jack drops on
persons in the work area.
retracting
the jack during
Use only the approved positions when
operating the jack horizontally (see below).
✔
OK
✔
OK
Fig. 4 - Horizontal Operation
body in between objects being pushed and/or
supported only by the jack. Always use appropriately
rated blocking and/or supports to retain seperated
objects which are under tension.
6.0 MAINTENANCE
6.1 Adding Hydraulic Oil
If oil level is low, add additional oil as described in the
following steps. Be careful to avoid dirt entry during filling.
1. With ram fully retracted, set the jack in the upright
position. Be sure surface under jack is level.
2. Remove the oil fill/air release plug. On all jacks except
model GBJ100, the plug is located on the side of the
cylinder housing. On model GBJ100 only, the plug is
located at the top of the cylinder housing.
Use only Enerpac HF Series hydraulic oil
(ISO Grade 32) poured from a clean container.
alcohol, glycerin, vegetable oil or other unapproved
fluids will damage the jack, resulting in possible
failure or malfunction of the device. Personal injury
and/or property damage may occur.
3. All models except GBJ100: Fill until oil level is even
with bottom edge of the oil fill hole. See Fig. 5.
4. Model GBJ100 only: Fill until oil level is about 3 inches
[75 mm] below the oil fill hole. See Fig. 6.
Fig. 5 - Oil Level, all
models except GBJ100
4
NO
NO
Never place your hands, feet or
The use of motor oil, brake fluid,
Fig. 6 - Oil Level,
Model GBJ100 only