Enerpac BHP-152 Notice D'emploi page 3

5.0 OPERATION
IMPORTANT: It is mandatory that the
operator has a full understanding of all
instructions, safety regulations, cautions
and warnings, before starting to operate
any of this high force tool equipment. When in doubt,
contact Enerpac.
5.1 Advancing and retracting the cylinder
All BHP Puller Sets are equipped with a single-
acting, spring return cylinder and a handpump. For
complete operating instructions refer to the instruc-
tion sheet included with each pump and cylinder.
Handpumps to operate single-acting cylinders are
equipped with a release valve to release pressure.
Close the release valve, raise and lower the pump
handle to advance the cylinder. To retract the
cylinder, open the release valve.
5.2 Air removal
Advance and retract the cylinder several times
avoiding pressure build-up. Air removal is complete
when the cylinder motion is smooth.
5.3 Using grip pullers
Build up your application as shown in illustr. 1 below
and illustration 5 on page 6. Remember that the
triple grip puller provides a more stable and secure
grip, with a more even pulling force than the double
grip puller. Do not exceed 50% of the rated puller
capacity with a double grip puller. Start pumping
and apply hydraulic pressure gradually to remove
the part.
illustration 1 - Grip Pullers
Removing pulley with
2-jaw grip puller
(double crosshead)
Do not exceed
50% of rated
capacity.
Removing pulley with
3-jaw grip puller
(triple crosshead)
5.4 Using bearing cup puller
Build up your application as shown in illustration 2
with the internal grip puller. See also illustr. 7 page
8. Align puller legs and arms and apply hydraulic
pressure gradually to remove the part.
illustration 2 - Cross head puller with bearing cup
puller attachment
Do not
exceed
50% of
rated
capacity.
5.5 Using cross bearing pullers
To pull: The cylinder must be positioned above the
slotted crosshead. Align puller legs and adjusting
screw and apply hydraulic pressure gradually to
remove the part.
To push: Build up the application as shown in
illustration 3. Notice that the cylinder must be
positioned under the slotted crosshead. Align
puller legs and adjusting screw and apply hydraulic
pressure gradually to remove the part.
illustration 3 - Pushing with cross bearing puller
Do not
exceed
50% of
rated
capacity.
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