Digger Derrick Specs EEC-0170 V1.2
Digger Derrick Specifications
Pump Specs
Hydraulic
System
Pump
Speed
RPM
Max. Flow
GPM
Flow
L/Min
Pressure
PSI
Pressure
Bar
Piston
Pump
130cc
2100 72 273 Standby
Pump
400
4800
28
330
Pump Flows listed are at free flow condition (100 PSI)
Standby pressure is adjusted at the pump, and is the pressure created by the
pump when there is no demand
Standby pressure is displayed on the console gauge when there are no active
functions
Control Valve Specs
Pressure values are measured in the load sense line with the work port blocked,
function stalled, or cylinder at the end of stroke.
The system pressure gauge on the control console displays the pump pressure.
Pump pressure is the total of work port pressure plus standby (differential) pressure;
therefore the gauge will read higher than work port pressure by the value of the standby
pressure.
The inlet relief (on the control valve) is a secondary protection in the case of
pump relief valve failure. To set this pressure, the pump pressure must be temporarily
adjusted higher than specification. Once the inlet relief is adjusted, the pump relief valve
must be reset to its proper pressure. Failure to do so will cause the truck engine to
attempt to start under load, or create excess heat generation.
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