Overview

This document details the technical specifications, features, and operational data for Hyundai electric forklifts models 15BT-7, 18BT-7, and 20BT-7. It covers dimensions, performance, hydraulic and electrical systems, safety, ergonomics, and mast configurations.

1. Specifications

1.1 General Dimensions and Capacities

• Load capacities range from 1.5 to 2.0 tons depending on the model.
• Battery voltage is nominally 24V with approximately 500 Ah capacity.
• Service weights vary between 3,000 and 3,400 kg.
• Fork dimensions and carriage widths comply with ISO 2328 standards.
• Travel speed is consistent at 17 km/h (10.6 mph) across models.
• Gradeability ranges from 13.7% to 16.4% depending on the model.

1.2 Tires and Wheels

• Front tires: solid rubber or pneumatic, sizes around 18x7-8 or 200/50-10.
• Rear tires: solid rubber or pneumatic, sizes around 15x4.5-8.
• Dual rear tires improve stability during lifting.

1.3 Mast Specifications

• Mast types include 2-stage limited free lift and 3-stage full free lift.
• Maximum fork heights range from ~3,000 mm to over 5,500 mm depending on mast and model.
• Mast tilt angles: 5° forward, 7° backward.
• Load capacities at 500 mm load center specified per mast height/type.

2. Performance and Drive System

• High-efficiency AC motors controlled by ZAPI 8 kHz high-frequency controller.
• Regenerative braking during direction changes, deceleration, and braking.
• Drive motor power ranges from ~6.5 kW to 10.5 kW depending on model and voltage.
• Hydraulic pump motors rated around 14 kW.
• Battery weights between 710 kg and 835 kg.
• AC drive control enhances efficiency and durability.

3. Safety and Ergonomics

• Anti-rollback system for safe ramp operation and start.
• Down-control and down-safety valves prevent uncontrolled fork lowering.
• Adjustable steering wheel and ergonomic operator compartment for comfort and productivity.
• Multi-functional switch lever for lights and horn operation.
• Self-diagnostic LCD monitor displays faults, battery level, and operation mode.
• Strong overhead guard compliant with EEC and ANSI standards.
• Ratchet-type parking brake requiring minimal effort.
• Rear safety lamps with turn signals, tail lamps, and brake lights for visibility.

4. Hydraulic and Mechanical Systems

• Large-capacity hydraulic system with low noise control valve for efficiency and durability.
• Disc-type multiple oil-bath brakes for maintenance-free operation.
• ORFS hoses prevent hydraulic oil leakage.
• Heavy-duty single frame designed for durability and safety.

5. Maintenance and Serviceability

• Easy battery replacement via swing-up compartment with gas-spring assisted cover.
• Concentrated fuse box for easy inspection.
• Enclosed AC motors without brushes or commutators reduce maintenance and increase durability.
• Easy access to components for routine maintenance.

6. Additional Features and Options

• Multiple performance modes: High, Normal, Economic, and Turtle for varied working conditions.
• Adjustable suspension seat with optional seat belt, armrest, and hip restraint.
• Console box and cup holder for operator convenience.
• High visibility headlights and rear work lights.
• DC-DC converter with UL and CE certification for electrical safety.

7. Forklift Model Specifications and Load Capacities

Mast Types and Maximum Fork Heights

• 2-Stage Mast: Fork heights from 2,500 mm to 5,500 mm with multiple increments.
• 3-Stage Mast: Fork heights from 3,700 mm to 7,000 mm with intermediate steps.
• Dual Free Lift 3-Stage Mast: Same height range as 3-stage mast, offering enhanced lifting flexibility.

Load Capacities and Load Centers

• Load centers range from 500 mm to 2,000 mm.
• Load capacities vary from 500 kg up to 2,000 kg depending on mast, height, and load center.
• Examples: 1,500 kg at 3.0 m V Mast with 500 mm load center; 2,000 kg at 4.7 m TF Mast with 1,100 mm load center.

Fork Dimensions

• 15/18BT-7 Models: Fork thickness 35 mm, width 100 mm, lengths 750 mm to 1,500 mm.
• 20BT-7 Model: Fork thickness 40 mm, width 100 mm, lengths 900 mm to 1,600 mm.

Additional Features and Options

• Side Shift: Standard or integral for precise load positioning.
• Valve & Hose Piping: 3-spool and 4-spool internal types available.
• Dual Voltage Support: 36V and 48V electrical systems.
• Cold Storage Capability: Operation down to -30°C.
• Certifications: UL and CE compliant with UL Type “E” and “EE”.
• Operator Controls: Finger tip control for enhanced precision.
• Tire Options: Solid non-marking, cushion, and rear wide tires (15 x 5.5 - 9) for 18/20BT-7.

Attachments and Accessories

• Side Shift
• Hinged Fork
• Hinged Bucket
• Rotating Fork
• Push Pull
• Rotating Roll Clamp
• Carton Clamp
• Pallet Invert
• Drum Clamp
• Bale Clamp
• Load Extender
• Fork Positioner
• Load Stabilizer

Load and Weight Data

Load weights range from approximately 140 kg to over 3,700 kg depending on model and configuration, supporting diverse industrial applications.

Summary of Critical Parameters

• Load centers: 500 mm to 2,000 mm
• Load capacities: 500 kg to 2,000 kg
• Fork lengths: 750 mm to 1,600 mm
• Maximum fork heights: up to 7,000 mm
• Operating temperatures: down to -30°C for cold storage models
• Voltage options: 36V and 48V
• Certifications: UL and CE compliant

Conclusion

The Hyundai 15BT-7, 18BT-7, and 20BT-7 electric forklifts combine advanced AC motor technology, robust hydraulic and mechanical systems, and comprehensive safety features. Their flexible mast configurations, ergonomic operator environments, and extensive accessory options make them suitable for a wide range of industrial material handling tasks, emphasizing efficiency, safety, and environmental friendliness.