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5. Installation
5.1. Lifting the grab
DANGER!
Be sure of observing the instructions below because they are related to safety
Move the grab with the grabs completely closed and hydraulic lines plugged.
When lifting the grab, use only the lug provided and sufficiently powerful lifting equipment.
Ropes and rugs must be in good condition.
5.2. Requirements on the carrier
WARNING!
Be sure of observing the instructions because they are related safety and the life of the grab
EVERDIGM hydraulic grab, EPG series is designed to be used with an hydraulic excavator. Refer to the
following points when deciding an excavator for the grab.
Carrier weight :
The excavator may fall over if the capacity is not good enough to use the grab or if it is equipped
with a long boom and/or a long reach arm. Proper excavator should be decided for use with the
grab or such long boom and arm.
Hydraulic system :
The hydraulic system of the carrier must be suitable for the grab. Low flow rate and pressure
results in slow working speed and low crushing force respectively. Check the specification of the
carrier.
For the hydraulic grab, the inner diameter of the hydraulic line must be correspond to page 12
“ or bigger. If the inner diameter is small inadequately, back-pressure
increase and the hydraulic oil in the lines may be overheated.
Have the bigger line for the grab closing than the line for the grab opening.
The seamless steel tube with thickness of more than 4.5mm (schedule 80 or higher) must be used.
And the hose must satisfy SAE R11~14.
Generally speaking the hydraulic oil originally recommended for the carrier can be used for the
EVERDIGM hydraulic grab. However, since working with the hydraulic grab will heat the oil much
more than the usual excavation work, the viscosity of the oil must be checked. When the grab is
used continuously, the viscosity of the hydraulic oil should be 15~100 cSt at the whole operating
temperature range. For more details about hydraulic oil, refer to page 32, Chapter
“7.4. Hydraulic
oil
”
When installing the grab with no pre-filled oil in it, the grab
‟s cylinders need a lot of oil. So you must
fill the oil by the proper level in oil tank after operating the grab two or three times.
Summary of Contents for EPG05
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