Ega Master 79915 Manual De Instrucciones página 24

HYDRAULIC SYSTEM REQUIREMENTS
An operation pressure of 80 bar/ 1137 PSI and a volume flow of 15 l/ min/ 4 gallons/ min is required to
achieve the specified performance data. Volume flow of more than 15 l/ min / 4 gallons/ min is conveyed back
to the tank via a bypass. At pressure of more than 80 bar/ 1137 PSI, a pressure control valve has to be used.
WARNING!
Never use your hydraulic tool without a pressure relief valve in line!
The system should not have more than 250 PSI/ 17 bar back pressure measured at the tool end of the
operating hoses. The system conditions for measurement are at maximum fluid viscosity or 400 ssu / 82
centistokes (minimum operating temperature).
The hydraulic system should have sufficient heat rejection capacity to limit the maximum oil temperature to
140° F / 60° C at the maximum expect ed ambient temperature. The recommended minimum cooling capacity
is 5 hp / 3.73 kW at a 40° F / 4° C difference between ambient temperature and oil temperature.
The hydraulic system should have a minimum of 25 micron full-flow filtration. It is recommended that
filter elements be sized for a flow of at least 30 gpm/ 114 lpm for cold temperature startup and maximum dirt
holding capacity.
The recommended hose size is 0.500 inch / 12 mm I.D. to 50 ft / 15 m long and 0.625 inch / 16 mm I.D.
minimum up to 100 ft / 30 m long.
The rotary hammer drill return hose must connect directly to the circuit return line and go straight through
the oil filter, thermal valve, and oil cooler to the reservoir. To prevent trapped or reversed pressure, fluid
should not be returned through a blocking or reversing valve.
The rotary hammer drill cannot be operated with the hydraulic flow reversed. Supply (IN) and return (OUT)
hoses must be connected as marked on the sides of the tool ports.
IMPORTANT!
Do not run the tool return hose through stack or directional valves. If the circuit is operated from a stack
valve, tap only the pressure port to the valve. Connect the tool return directly to the return fluid line.
Your hydraulic rotary hammer drill is an open-center tool. Operate open-center tools from opencenter
hydraulic circuits only. Operate closed-center tools from closed-center hydraulic circuits only.
The rotary hammer drill can be operated with oil only.
Pay attention that the rotary hammer drill is not operated with pressure exceeding the characteristics
indicated, when power is supplied by the system.
Apply pressure reducing valves, otherwise the machine could be damaged or destructed.
When working in a surrounding at 4° C, impact inter ruptions can occur. Therefore it is recommended to
start the machine and warm it up first.
Temperature of oil
22
CHARACTERISTICS
Hydraulic fluid
Feed pressure
Volume flow
Oil filtering
Hydraulic oil
80 bar / 1137 PSI
15- 45 l/ min / 4– 11.9 gallons
35°C÷80 °C
ISO purity degree 18/13