EVERDIGM EPG05, Руководство по эксплуатации и техническому обслуживанию

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In general, oil companies guarantee new oil to have a particle count of 40 microns maximum. When adding
oil to existing tank the oil must be filtered.
The impurities in the hydraulic oil can cause damages to the grab and carrier as follows :

The working life of the hydraulic elements is significantly shortened

Valves do not function properly due to spool stick

Wear of cylinder rod and seals

Shortened working life and reduced efficiency of hydraulic oil (overheats of oil, deteriorates of oil quality,
electro-chemical changes in hydraulic oil)
We recommend to replace the hydraulic oil and oil filters at the intervals shown in the following table, which
is based on the grab operating time.
Hydraulic Oil Every 600 hours
Oil filters Every 100 hours

Oil cooling
The maximum permitted hydraulic oil temperature in continuous grab operation is 90

C (194

F). Therefore,
a reliable hydraulic oil thermometer is necessary. If there is no thermometer on the carrier one must be
installed. The temperature of hydraulic oil depends on ambient conditions, the cooling capacity of the carrier
and on the oil flow through the grab.
When the hydraulic grab is used continuously it is necessary to have cooling system with extra cooling
capacity compared with normal excavation work. The oil cooler of the carrier must have a oil flow capacity of
at least twice the grab
‟s maximum oil flow. The cooler must stand the dynamic pressure of 20 bar (290 psi).
If the carrier
‟s oil cooler is too small either the original cooler must be replaced with a larger one or an
auxiliary cooler must be installed. For this, please contact your carrier
‟s dealer or EVERDIGM dealer.