Ningbo Songee Hydraulic Technology Co., Ltd.
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Dock Leveler Power Unit
Dock Leveler Power Unit
A hydraulic power unit for controlling the ramp and lip of dock levelers. Catalog models use a 380VAC motor; the solenoid-control version uses a 24VDC valve coil.

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  • Overview

Standard Version

Introduction

This hydraulic power pack integrates a gear pump, AC motor, multifunctional manifold, cartridge valves, tank and hydraulic accessories. It provides efficient, reliable control of the upward and downward movements of the ramp and lip of a dock leveler. One push button controls the complete operating cycle.

External Dimension Drawing

Dock Leveler Power Unit external dimension drawing - Standard Version
External dimensions (mm). Click the drawing to view the full-size image.

Working Principle

Dock Leveler Power Unit hydraulic circuit - Standard Version
Hydraulic circuit diagram.

Model and Specifications

Model Motor Voltage Motor Power (kW) Rated Speed (rpm) Pump Displacement (ml/rev) System Pressure (MPa) Tank Capacity (L) L (mm)
YBZ5-E2.1B4E80/LBAOT1 380VAC 0.75 1450 2.1 16 6 557
YBZ5-E2.7B4E80/LBAOT1 380VAC 0.75 1450 2.7 14 6 557

Solenoid-Control Version

Introduction

This hydraulic power pack integrates a gear pump, AC motor, multifunctional manifold and cartridge valves. A normally open solenoid valve allows the ramp and lip to float with the vehicle during loading and unloading and provides an emergency-stop function during lowering.

External Dimension Drawing

Dock Leveler Power Unit external dimension drawing - Solenoid-Control Version
External dimensions (mm). Click the drawing to view the full-size image.

Working Principle

Dock Leveler Power Unit hydraulic circuit - Solenoid-Control Version
Hydraulic circuit diagram.

Model and Specifications

Model Motor Voltage Motor Power (kW) Rated Speed (rpm) Pump Displacement (ml/rev) System Pressure (MPa) Tank Capacity (L) Solenoid Valve Voltage L (mm)
YBZ5-E2.1A4E81/LBABT1 380VAC 0.75 1450 2.1 16 3.5 24VDC 457
YBZ5-E2.7B4E81/LBABT1 380VAC 0.75 1450 2.7 14 6 24VDC 557

Remarks

  • Contact our sales engineer for other pump displacements, motor powers, pressures or tank capacities.
  • 60 Hz motors with CSA or UL certification are available on request.

Precautions

  1. S3 intermittent duty: 1 minute on and 9 minutes off. Continuous operation is not permitted.
  2. Clean all hydraulic components, cylinders, hoses and fittings before installing the power unit.
  3. Use clean hydraulic oil free of impurities, with a viscosity of 15-68 cSt. N46 hydraulic oil is recommended.
  4. Check the oil level in the tank after the initial operation of the power unit.
  5. Change the hydraulic oil after the first 100 operating hours and every 3,000 hours thereafter.

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