Cat GP25N Specifications
The Caterpillar GP25N is a 2.5-ton (2,500 kg / 5,500
lb) LPG/petrol-powered pneumatic-tire forklift engineered for versatile
indoor-outdoor material-handling operations. Designed for manufacturing plants,
logistics centers, distribution hubs, fabrication workshops,
construction-material yards, and mixed-environment fleets, the GP25N combines
excellent drivability, smooth hydraulic performance, low vibration
characteristics, and strong reliability across multi-shift workloads.
This GP25N configuration includes two engine options: the Nissan K21 LE
(LPG/petrol) and the GST GK21E (LPG only). Both engines belong to the widely
proven K-series industrial engine family, recognized globally for reliable
spark-ignition performance, clean combustion, strong mid-range torque, and long
operating life.
The GP25N incorporates a rigid welded-steel
chassis, a high-visibility mast design, hydrostatic steering, ergonomic
operator compartment, and durable drivetrain components that remain
dependable in challenging work environments. Maintenance personnel
benefit from the easy-access engine bay, centralized filter layout, and
simplified service intervals.
Engine Options:
1. Nissan K21 LE (LPG/Petrol)
2. GST GK21E (LPG)
Both engines share similar displacement and architecture, providing predictable
torque output and low-maintenance spark-ignition operation.
Nissan K21 LE
- Type: Inline 4-cylinder, 4-stroke spark-ignition
- Displacement: 2.1 L (2,065 cc / 126 cu in)
- Bore x stroke: approx. 89 x 76 mm (3.50 x 2.99 in)
- Maximum power: approx. 37-42 kW (50-56 hp) @ 2,400-2,600 rpm
- Peak torque: approx. 150-165 Nm (111-122 lb-ft) @ 1,600-1,800 rpm
- Fuel: LPG or gasoline depending on configuration
- Fuel system: mixer-type LPG or EFI petrol
- Aspiration: naturally aspirated
- Idle speed: approx. 750 ± 50 rpm
- Emissions: Tier-compliant globally
GST GK21E
- Type: Inline 4-cylinder LPG spark-ignition
- Displacement: 2.1 L (2,065 cc / 126 cu in)
- Maximum power: approx. 40-45 kW (54-60 hp) @ 2,400-2,600 rpm
- Peak torque: approx. 150-170 Nm (111-125 lb-ft) @ 1,600-1,800 rpm
- Fuel system: electronically metered LPG system
- Ignition: electronic distributorless ignition (EDIS)
- Emissions: EPA / CARB compliant (regional variants)
These engines prioritize smooth acceleration, constant torque at low RPM, and
low maintenance requirements.
Lubrication System (both engines):
- Type: full-pressure lubrication system
- Oil pump: gear-type
- Oil capacity: approx. 3.7-4.2 L (3.9-4.4 qt)
- Normal oil pressure: approx. 280-420 kPa (41-61 psi)
- Recommended oil grade: SAE 10W-30 or 15W-40
- Oil filter: spin-on full-flow
Cooling System (both engines):
- Cooling type: liquid-cooled
- Coolant capacity: approx. 6-7.5 L (6.3-7.9 qt)
- Thermostat: opens at approx. 82°C (180°F)
- Fully open near 95°C (203°F)
- Radiator: fin-tube heavy-duty
- Fan: engine-driven mechanical
- System pressure: 13-16 psi (88-108 kPa).
Transmission:
- Type: industrial powershift
- Forward gears: 1-2
- Reverse gears: 1-2
- Travel speed unladen: approx. 18-20 km/h (11-12 mph)
- Travel speed laden: approx. 16-18 km/h (10-11 mph)
- Transmission fluid capacity: approx. 8-10 L (8.4-10.5 qt)
- Fluid type: Dexron III ATF
- Cooling: transmission oil cooler integrated with radiator
Front Drive Axle:
- Axle type: rigid industrial drive axle
- Differential: bevel-gear type
- Axle oil capacity: approx. 4-5 L (4.2-5.3 qt)
- Lubricant: SAE 80W-90 gear oil
Rear Steer Axle:
- Type: oscillating single-pivot axle
- Oscillation range: approx. ±8-10 degrees
- Lubricant capacity: approx. 1-1.5 L
Braking System:
- Service brakes: hydraulic drum brakes
- Parking brake: mechanical hand-lever drum
- Brake actuation: hydraulic master cylinder.
- Voltage: 12 V
- Battery: approx. 70-90 Ah
- Alternator: approx. 40-60 A output
- Starter motor: approx. 2.0-2.5 kW
- Wiring: sealed connectors with abrasion-resistant harnessing
- Dash instrumentation: oil pressure, temp gauge, ammeter/charge lamp, LPG gauge
(LPG variant), hour meter.
Drive
Configuration:
- Drive wheels: front
- Steering wheels: rear
- Drive system: 2-wheel drive
Tire Specifications (Pneumatic):
- Front: approx. 7.00-12
- Rear: approx. 6.00-9
- Optional: solid pneumatic or non-marking tires
Chassis Structure:
- Welded heavy-steel frame
- Integrated counterweight
- Reinforced overhead guard
- Anti-slip steps and handrails
- Protected hydraulic and electrical routing
Steering:
- Steering type: fully hydrostatic
- Steering pump flow: approx. 6-10 L/min (1.5-2.6 gpm)
- Steering cylinder: double-acting type
- Steer axle: center-pivot oscillating
- Turning radius: approx. 2.1-2.4 m (83-95 in).
- Pump type: engine-driven gear pump
- Flow rate: approx. 40-60 L/min (10-15.8 gpm)
- Max pressure: approx. 17-19 MPa (2,500-2,750 psi)
- Hydraulic reservoir: approx. 25-30 L (26-32 qt)
- Fluid: ISO VG 32 or VG 46
- Lift cylinders: dual double-acting
- Tilt cylinders: dual cushioning cylinders
Optional Attachments:
- Side-shift
- Fork positioner
- Rotator
- Drum/Bale clamp
- Push-pull.
| Service Refill Capacities |
- Engine oil: 3.7-4.2 L
- Cooling system: 6-7.5 L
- Transmission: 8-10 L
- Drive axle: 4-5 L
- Steer axle: 1-1.5 L
- Hydraulic tank: 25-30 L
- Mast types: Simplex, Duplex, Triplex
- Lift range: 2.5-6.0 m
- Free lift: 80-1,000 mm
- Standard forks: 42 in (1,070 mm) or 48 in (1,220 mm)
- Fork width: 100-125 mm
- Fork thickness: 35-45 mm
- Carriage width: approx. 900-1,000 mm
- Fork class: ITA Class II.
- Rated capacity: 2,500 kg (5,500 lb)
- Load center: 500-600 mm (20-24 in)
- Capacity de-rates with height, fork length, attachments, and off-center loads.
- Lift speed (unladen): 0.45-0.55 m/s
- Lift speed (laden): 0.30-0.40 m/s
- Lowering speed: 110-160 ft/min
- Gradeability (unladen): 20-25%
- Gradeability (laden): 15-20%
- Drawbar pull: 13,000-18,000 N.
- Length to fork face: approx. 2.5-2.6 m
- Width: approx. 1.15-1.20 m
- Overhead guard height: approx. 2.1-2.2 m
- Wheelbase: approx. 1.55 m
- Ground clearance: approx. 110-130 mm
- Turning radius: 2.1-2.4 m
- Aisle width (1000x1200 pallet): approx. 3.5-3.8 m
- Max fork height: 2.5-6.0 m
- Free lift: 80-1,000 mm
- Operating weight: approx. 3,600-4,100 kg
- Counterweight mass: approx. 1,600-2,000 kg.
250-Hour:
- Oil and filter change
- Lubricate mast and steering joints
- Clean radiator
500-Hour:
- Replace transmission fluid
- Inspect axle seals
- Clean hydraulic suction strainer
1,000-Hour:
- Replace hydraulic oil and filters
- Replace coolant
2,000-Hour:
- Full drivetrain inspection
- Steering alignment
- Complete mast structural evaluation.
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| Telehandlers Specifications |
| Front-End Loader Specifications |