12V DC 1.5kW Hydraulic Power Unit for Electric Forklifts and Lift Tables
Product Description
Product Detail
In electric walkie stackers, pallet trucks, and warehouse scissor lift tables, hydraulic efficiency directly governs battery operating hours per shift. Equipment operators demand fast mast elevation without voltage sag, combined with smooth, controlled pallet descent that prevents fragile cargo from jarring upon floor contact.
Standard bi-directional hydraulic systems waste significant electrical energy by driving the DC motor during both lifting and lowering cycles.
The YBZ5-F2.1B1W2/WUAAD1 12V DC 1.5kW Hydraulic Power Unit for Electric Forklifts and Lift Tables optimizes warehouse duty cycles by implementing a specialized Power-Up / Gravity-Down hydraulic circuit. The 1.5 kW DC motor drives a high-pressure gear pump only during upward travel. For lowering, the motor remains completely de-energized; a 12V DC solenoid cartridge valve opens to return fluid to the tank, using gravity alone while a built-in pressure-compensated flow control valve regulates descent velocity.
| Technical Specification | Details |
|---|---|
| Model Designation | YBZ5-F2.1B1W2/WUAAD1 |
| Application Scope | Electric Walkie Forklifts, Stackers, Lift Tables |
| Electric Motor Operating Voltage | 12V DC |
| Electric Motor Rated Power Output | 1.5 kW |
| Nominal Motor Speed | 2,500 RPM |
| Hydraulic Gear Pump Displacement | 2.1 ml/rev (high-pressure micro-gear pump) |
| System Relief Valve Pressure | 20.0 MPa (200 bar / 2,900 psi) |
| Hydraulic Reservoir Volume | 5.0 Liters (Durable steel reservoir) |
| Solenoid Envelope Valve Voltage | 12V DC |
| Overall Envelope Length (L) | 459 mm (Compact horizontal chassis footprint) |
| Manifold Block Metallurgy | Series 5 High-Strength Aluminum Profile Block |
| Operating Duty Cycle Standard | S3 Intermittent Duty (30 seconds ON / 270s OFF) |
| Recommended Hydraulic Fluid | ISO VG 46 (Viscosity 15-68 cSt at operating temp) |
| Standard Mounting Orientation | Horizontal Mounting |
I. Direct Technical Answers for Logistics Fleet Engineers
How does the integrated pressure-compensated valve prevent runaway pallet drops?
On standard needle-valve power packs, empty forks descend very slowly, while a 1.5-ton pallet load causes the mast to drop rapidly. The YBZ5-F2.1B1W2/WUAAD1 12V DC 1.5kW Hydraulic Power Unit for Electric Forklifts and Lift Tables integrates an internal pressure-compensated flow control cartridge inside its Series 5 aluminum manifold. As load pressure increases, an internal spring-loaded metering spool automatically adjusts orifice area, maintaining a constant oil return flow rate. Whether lowering an empty mast or a fully loaded pallet, lowering speed remains rock-steady and predictable.
What is the S3 intermittent duty rating and how should it be wired?
This power unit is engineered under the S3 intermittent duty cycle rating: 30 seconds of continuous motor operation followed by 270 seconds of resting cooldown. Because 12V DC starter-type motors draw high starting amperages under 20 MPa peak pressures, continuous running will overheat motor windings. The motor circuit must be wired through a heavy-duty continuous-duty DC contactor/solenoid triggered by the machine’s tiller handle raise button, ensuring the motor runs only during active hoisting.
[12V Battery Pack] → [Heavy-Duty DC Contactor] → [1.5 kW 2500 RPM DC Motor]
↓
[Single-Acting Ram] ← [Check Valve & 20MPa Relief] ← [2.1 ml/r Gear Pump]
│
└── (Gravity Down) → [12V Solenoid Valve & Flow Compensator] → [5L Tank]
II. Manifold Architecture & Mechanical Integration
The Series 5 extruded aluminum manifold block on the YBZ5-F2.1B1W2/WUAAD1 12V DC 1.5kW Hydraulic Power Unit for Electric Forklifts and Lift Tables acts as the central nerve center of the power unit, combining five critical fluid control functions into a single zero-leakage block:
- Integrated Check Valve: Prevents hydraulic backflow through the gear pump when the motor stops, maintaining fork elevation indefinitely without mast drift.
- Adjustable Main Relief Valve: Factory calibrated to 20 MPa to protect lifting chains and mast structures from overload, with an external tamper-resistant adjustment screw.
- Electromagnetic Lowering Valve: Normally closed 2-way 2-position cartridge valve with a manual override push-pin, allowing safe manual descent if vehicle battery power is completely drained.
- Heavy Steel 5L Reservoir: Features an internal anti-slosh baffle, a magnetic drain plug to trap ferrous wear particles, and a breather-filler cap with integrated filtration.
III. Installation & Preventive Maintenance Guidelines
To maximize service life across demanding warehouse distribution centers:
Cleanliness Prior to Assembly: Flush all connecting hydraulic hoses, mast cylinders, and quick-disconnect fittings before connecting to the power unit port. Over 80% of valve sticking issues originate from contaminated hoses during initial machine assembly.
Fluid Viscosity Selection: Use clean ISO VG 46 anti-wear hydraulic oil (viscosity range 15 to 68 cSt). For cold-storage freezers operating at −20°C, use low-viscosity ISO VG 32 or synthetic Arctic hydraulic fluid.
Oil Change Schedule: Drain and replace hydraulic fluid after the initial 100 hours of break-in operation, followed by routine fluid replacement every 3,000 operating hours.
IV. FAQ
What parameters do I need to provide to customize a hydraulic cylinder?
Please provide bore size, stroke, working pressure, mounting style, port thread specification, whether cushioning is required, working temperature and medium. We can quote and produce accordingly.
What is the difference between single-acting and double-acting hydraulic cylinders?
Double-acting cylinders use hydraulic oil for both extend and retract movements. Single-acting cylinders only push out by oil pressure, and retract by spring, gravity or external load.
Can a leaking hydraulic cylinder be repaired?
Most cylinders are repairable. Normally you only need to replace the seal kit. If the barrel is deeply scored or the piston rod is bent, replacement is recommended.
Why does the cylinder drift or slowly sink under load?
It is usually caused by internal seal wear. It may also come from a faulty check valve or counterbalance valve in your hydraulic circuit.
What is the normal working temperature range for your hydraulic cylinders?
Standard seals work from −20°C to +80°C. We can supply special seal materials for high temperature or low temperature applications.
What is your delivery time for hydraulic cylinders?
Standard models are in stock and can ship within 3–7 days. Custom non-standard cylinders normally take 15–25 working days.
V. Factory Direct Supply for Material Handling Equipment Manufacturers
Standardizing your electric stacker, lift table, or dock equipment line with the YBZ5-F2.1B1W2/WUAAD1 12V DC 1.5kW Hydraulic Power Unit for Electric Forklifts and Lift Tables?
Connect with HCIC’s specialized power unit engineering team in Jinan. We provide verified CAD integration files, rapid prototype testing samples, and high-volume container shipments directly to equipment OEMs worldwide.