Komatsu FG25-8 Specifications
The Komatsu FG25-8 is a 2.5-ton (2,500 kg / 5,500 lb)
LPG/petrol-powered pneumatic-tire forklift designed for industrial operations
requiring reliable mid-capacity handling, excellent maneuverability, smooth
engine performance, and low operating cost.
As part of the respected Komatsu -8 Series, the
FG25-8 is widely used in warehousing, logistics terminals, manufacturing
plants, pallet-handling depots, fabrication facilities, agricultural
processing, and general indoor-outdoor material-handling environments.
The FG25-8 is equipped with the proven Nissan H20 industrial engine - a
rugged, smooth-running 2.0-liter inline-4 spark-ignition powerplant
trusted across many forklift platforms for decades. The engine’s
mechanical simplicity, strong torque curve, low fuel usage, and easy
serviceability make the FG25-8 a long-term fleet favorite.
The machine uses a reinforced welded chassis, torque-converter
powershift Transmission, hydrostatic steering, efficient hydraulic
system, heavy-duty mast architecture, and an operator station engineered
for strong visibility, low vibration, and intuitive control. Technicians
appreciate its simple layout, wide-opening hood, centralized service
points, durable electric harnesses, and reliable components.
Nissan H20 -
Technical Data
- Engine type: inline 4-cylinder, 4-stroke, spark-ignition
- Displacement: approx. 1.974 L (1,974 cc)
- Bore/stroke: 83x80 mm (3.27x3.15 in)
- Rated output: approx. 33-38 kW (44-51 hp) @ 2,400-2,600 rpm
- Peak torque: approx. 140-155 Nm (103-114 lb-ft) @ 1,600-1,800 rpm
- Fuel options: LPG or gasoline (market-specific)
- Fuel system: mechanical carburetor or early EFI depending on region
- Aspiration: naturally aspirated
- Combustion: conventional spark-ignition
- Idle speed: approx. 650-750 rpm
- Known traits: durable, simple to service, excellent cold start performance.
Lubrication System
- Lubrication type: full-pressure wet-sump
- Oil pump: internal gear-type
- Oil capacity: approx. 3.5-4.5 L (3.7-4.7 qt)
- Operating oil pressure: 250-400 kPa (36-58 psi)
- Recommended oil: SAE 10W-30 or 15W-40
- Filter: spin-on full-flow
Cooling System
- Cooling type: liquid-cooled
- Coolant capacity: approx. 7-9 L (7.4-9.5 qt)
- Thermostat opening temp: 82°C (180°F)
- Fully open: approx. 95°C (203°F)
- Cooling fan: mechanical belt-driven
- Water pump: belt-driven centrifugal
- Radiator: fin-tube industrial type
- System pressure: 88-108 kPa (13-16 psi)
Transmission
- Type: torque-converter powershift
- Gear set: 1-2 forward / 1-2 reverse
- Direction selection: mechanical lever or hydraulic shuttle
- Travel speed (unladen): 17-19 km/h (10.5-11.8 mph)
- Travel speed (laden): 15-17 km/h (9.3-10.5 mph)
- Transmission fluid capacity: 7-10 L (7.4-10.5 qt)
- Recommended fluid: Dexron II/III ATF
- Cooling: integrated oil-to-air cooler
Front Drive Axle
- Type: rigid industrial axle
- Differential: bevel-gear
- Oil capacity: 4-5 L (4.2-5.3 qt)
- Lubricant: SAE 80W-90
Rear Steer Axle
- Type: oscillating center-pivot
- Oscillation: ±8-10 degrees
- Lubricant capacity: 0.8-1.2 L
- Notes: allows stable operation on uneven surfaces.
Braking System
- Service brakes: hydraulic drum brakes
- Parking brake: mechanical lever
- Optional (rare): wet-disc brakes depending on market
- System voltage: 12 V
- Battery capacity: 65-90 Ah
- Alternator output: 35-55 A
- Starter motor: 1.5-2.2 kW
- Wiring: sealed connectors, abrasion-resistant harness
Instrument indicators:
- oil pressure
- coolant temperature
- charging system
- LPG fuel gauge
- parking brake lamp
- hour meter
Drive arrangement:
- Drive wheels: front
- Steering wheels: rear
- Drive type: 2WD
Tires:
- Front pneumatic: 7.00-12 or 28x9-15
- Rear pneumatic: 6.00-9
- Optional: solid pneumatic, non-marking, or wide-profile tires
Chassis construction:
- Welded heavy-steel frame
- Rear-set counterweight for load balance
- Reinforced overhead guard
- Anti-slip steps
- Protected hydraulic and electrical routing
- Rubber engine mounts for vibration reduction
Steering:
- Type: fully hydrostatic steering
- Steering pump flow: 5-10 L/min (1.3-2.6 gpm)
- Cylinder: double-acting
- Rear axle: center-pivot oscillating type
- Minimum turning radius: 2.1-2.3 m (82-91 in)
- Pump type: engine-driven external gear pump
- Flow output: 40-60 L/min (10-16 gpm)
- Maximum pressure: 16-18 MPa (2,320-2,610 psi)
- Hydraulic reservoir: 25-32 L (26-34 qt)
- Recommended oils: ISO VG 32 or VG 46
- Lift cylinders: dual, double-acting
- Tilt cylinders: dual with cushioning
- Valve type: mechanical spool
Supported attachments:
- Side-shift
- Rotator
- Fork-positioner
- Drum/bale clamp
- Slip-sheet push-pull
| Service Refill Capacities |
- Engine oil: 3.5-4.5 L
- Coolant: 7-9 L
- Transmission: 7-10 L
- Drive axle: 4-5 L
- Steer axle: 0.8-1.2 L
- Hydraulic tank: 25-32 L
Mast types:
- Simplex (1-stage)
- Duplex (2-stage)
- Triplex (3-stage full free-lift)
Lift height range:
- Simplex: 2.5-3.5 m
- Duplex: 3.0-4.5 m
- Triplex: 4.5-6.0 m
Fork specifications:
- Standard lengths: 1,070 mm (42 in), 1,220 mm (48 in)
- Optional: 914-1,829 mm (36-72 in)
- Width: 100-125 mm
- Thickness: 35-45 mm
- ITA fork class: Class II or III
- Rated capacity: 2,500 kg (5,500 lb)
- Load center: 500 mm (20 in)
Derating occurs with:
- long forks
- tall mast heights
- heavy or offset attachments
- uneven operating surfaces
- Lift speed (unladen): 0.45-0.60 m/s
- Lift speed (laden): 0.25-0.40 m/s
- Lowering speed: 100-150 ft/min
- Gradeability (unladen): 18-25%
- Gradeability (laden): 12-18%
- Drawbar pull: approx. 10,000-13,000 N (2,250-2,920 lbf)
- Overall length to fork face: 2.55-2.70 m (100-106 in)
- Overall width: 1.15-1.20 m (45-47 in)
- Overhead guard height: 2.05-2.15 m (81-85 in)
- Wheelbase: 1.55-1.60 m (61-63 in)
- Ground clearance: 110-140 mm (4.3-5.5 in)
- Free lift: 70-800 mm (3-32 in)
- Carriage width: 1,000-1,100 mm (39-43 in)
- Turning radius: 2.1-2.3 m
- Aisle width (1000x1200 pallet): 3.4-3.7 m
- Maximum fork height: 2.5-6.0 m
- Free lift: 70-800 mm
- Fork lengths supported: 36-72 in
- Operating weight: 3,600-4,100 kg (7,930-9,037 lb)
- Counterweight mass: 1,700-2,000 kg (3,748-4,409 lb)
250-hour:
- Engine oil and filter replacement
- Air filter service
- Mast and steering lubrication
- Radiator cleaning
500-hour:
- Transmission fluid replacement
- Axle lubrication check
- Hydraulic suction strainer cleaning
1,000-hour:
- Hydraulic oil and filter replacement
- Coolant replacement
- Cylinder and hose inspection
2,000-hour:
- Full drivetrain inspection
- Steering alignment check
- Structural mast inspection
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