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Electrical Motors & Wiring, Rexroth Hydraulic Pumps, Adjusting the Pump, Adjusting Flow & Pressure, Adjusting the Control Valve, Troubleshooting Guide, Formulas & Data, Pump Specifications. BTI ROCKBREAKER SYSTEMS, This section of the installation manual deals with the set up and adjustment procedure for both the Rexroth A11 pump and Danfoss valve, and it gives a general description on the principle of operation of the pump and control valves and is intended to give the Mechanic a better understanding of the importance of the various adjustments and their effect on the system. A trouble shooting guide is also included at the end of this manual. The electrical wiring of the power pack must be undertaken only by a qualified electrician. Both electric motors used on the hydraulic pump and cooling fan should be wired in a three phase delta configuration to provide optimum power unless stated otherwise. The electrician must ensure the direction of rotation of the motors are correct. If the direction of rotation is reversed the hydraulic pump will be seriously damaged in a very short period of time. Jog the motor to verify the direction of rotation. The pump will de-stroke and draw very little power from the electric motor when none of the hydraulic actuators are in use; this type of pump is commonly referred to as a variable displacement hydraulic pump. Used with a control valve having load sensing features utilizes the load sensing capabilities of this pump. BLEEDING THE HYDRAULIC PUMP, The hydraulic pump has three adjustments which must be checked and set to the required specification as called for in breaker service manual.
Tags : rexroth hydraulic pumps, trouble shooting guide, hydraulic actuators, delta configuration, variable displacement, qualified electrician, phase delta, hydraulic pump, optimum power, flow pressure, electrical motors, control valves, control valve, electrical wiring, troubleshooting guide
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