Operators Manual - Pentruder Modular Drilling system
25
Two identical 5/8” 6 m long or ¾” x 8 m hoses supply hydraulic power to the hydraulic motor.
When using a hydraulic feed unit two 1/4” hoses with the same length are used , strapped
together with a 10 mm water hose.
Mounting the hydraulic hoses
1. Connect the two 5/8” / ¾” hydraulic hoses to the Male and female 1/2"
or ¾”
couplings
on the hydraulic motor (see fig. 15) and on the power pack see fig. 14).
2.
Connect the two 1/4” hydraulic hoses to the couplings ¼” on the hydraulic feed unit
(see fig.15) and the power pack (see fig. 14).
Hoses, extension
As far, as is possible the hoses should not be extended to avoid pressure drop and power
losses. If the hoses must be extended, we recommend a maximum total length of 30 m from
power pack to drill motor. After the extension hoses have been connected, the power pack
should be left running for a minute operating the movements and starting the blade motor.
Then check the oil level and top up if necessary.
Note: If the extansion hoses are not pre-
filled with oil, the oil will foam and the power pack will not operate correctly. The power
pack must be bled and oil level reestablished. Contact your sales agent for advice
before using extension hoses.
Oil level
On the 76 mm level indicator the oil should be up to 1/3 of the glass when the power pack is
switched off, with the new 127 mm level indicator the oil should be up to 2/3 of the glass when
the power pack is switched off. Se also “Pressure drop” and “Shutting off the electrical motor
of the power pack”.
Pressure drop
To avoid unnecessary power losses the system should be run with as short hoses as
possible. The standard equipment contains 6 or 8 m long hoses and provides low-pressure
drop and excellent efficiency.
Water-cooled electric motor
The Pentpak 15/25 is equipped with a special high efficiency
electric motor for highest output at lowest possible power consumption. In spite of its
diminutive dimensions, the electric motor maintains a very high efficiency even under
maximum output. This is possible only because of adoption of a specially designed cooling
system the motor.
