Komatsu FG15HT-20 Specifications
The Komatsu FG15HT-20 is a compact 1.5-ton (1,500 kg /
3,300 lb) LPG/petrol pneumatic-tire forklift designed for light-to-medium
industrial operations requiring excellent maneuverability, smooth engine
performance, fuel efficiency, and long-term durability. As part of the premium
Komatsu 20 Series HT (Heavy-Tire) configuration, the FG15HT-20 offers greater
outdoor stability, improved traction, and a more robust pneumatic-tire stance
compared to cushion-tire variants.
The unit is powered by the Nissan K21 industrial engine - a well-proven
2.1-liter spark-ignition platform widely used in Komatsu, Nissan/UniCarriers,
and Caterpillar/TCM forklifts. The K21 is known for smooth power delivery,
excellent throttle response, low vibration, low emissions, and high
dependability under multi-shift workloads.
The FG15HT-20 incorporates a torque-converter
powershift transmission, hydrostatic steering, heavy-duty mast
structure, robust chassis, and an ergonomically designed operator
compartment. This model excels in environments requiring compact
equipment with the ability to operate both indoors and outdoors on
mildly uneven surfaces, thanks to its pneumatic tires and well-balanced
counterweight structure.
Technical Data:
- Engine model: Nissan K21 Industrial
- Engine type: inline 4-cylinder, 4-stroke, spark-ignition
- Displacement: 2.065 L (2,065 cc)
- Bore/stroke: 89x100 mm (3.50x3.94 in)
- Rated power: 37-42 kW (50-56 hp) @ 2,400-2,600 rpm
- Peak torque: 160-185 Nm (118-136 lb-ft) @ 1,600-1,800 rpm
- Fuel type: LPG or gasoline
- Fuel system: electronic fuel injection (EFI) or mixer system depending on year
- Aspiration: naturally aspirated
- Idle speed: 650-750 rpm
- Characteristics: extremely durable, quiet, fuel-efficient, and widely
supported with parts.
Lubrication System
- Type: full-pressure wet-sump
- Oil capacity: 4.0-4.5 L (4.2-4.8 qt)
- Oil pump: internal gear-type
- Normal oil pressure: 250-400 kPa (36-58 psi)
- Recommended oil: SAE 10W-30 or 15W-40
- Filter: full-flow spin-on
- Notes: designed for high-hour industrial duty cycles.
Cooling System
- Cooling type: liquid-cooled
- Coolant capacity: 7-9 L (7.4-9.5 qt)
- Thermostat opening temperature: 82°C (180°F)
- Fully open: 95°C (203°F)
- Radiator: heavy-duty fin-tube
- Water pump: belt-driven centrifugal
- Cooling fan: mechanical
- System pressure: 88-108 kPa (13-16 psi)
Transmission
- Type: torque-converter powershift
- Gear configuration: 1-2 forward / 1-2 reverse
- Direction lever: mechanical or hydraulic assist
- Travel speed (unladen): 16-18 km/h (10-11 mph)
- Travel speed (laden): 14-16 km/h (9-10 mph)
- Transmission fluid capacity: 6-8 L (6.3-8.4 qt)
- Recommended fluid: Dexron II/III ATF
- Transmission cooling: integrated oil cooler
Front Drive Axle
- Construction: cast-steel industrial axle
- Differential: bevel-gear
- Axle lubrication capacity: 3.0-4.0 L (3.2-4.2 qt)
- Lubricant: SAE 80W-90
Rear Steer Axle
- Type: oscillating center-pivot
- Oscillation: ±8-10 degrees
- Lubrication volume: 0.7-1.2 L
- Notes: provides stability on uneven ground.
Braking System
- Type: hydraulic drum brakes
- Parking brake: mechanical lever, drum-type
- Notes: durable, easy to service, predictable performance indoors and outdoors.
- System voltage: 12 V
- Battery capacity: 65-90 Ah
- Alternator output: 35-55 A
- Starter motor: 1.6-2.0 kW
- Electrical harness: sealed connectors, industrial-grade insulation
Indicators:
- oil pressure
- coolant temperature
- charging system
- LPG/petrol fuel gauge
- hour meter
- parking brake indicator
Drive layout:
- Drive wheels: front
- Steering wheels: rear
- Drive system: 2WD
Pneumatic Tires (HT-model)
- Front: 6.50-10 or 7.00-12
- Rear: 5.00-8
Optional: solid pneumatic, non-marking outdoor/in-plant tires
Chassis Features:
- Fully welded steel Construction
- Integrated heavy counterweight
- Reinforced overhead guard
- Anti-slip steps
- Rubber engine mounts reduce vibration
- Protected hydraulic and electrical routing
Steering:
- Steering type: fully hydrostatic
- Pump output: 5-8 L/min (1.3-2.1 gpm)
- Steering cylinder: double-acting
- Minimum turning radius: 2.0-2.2 m (79-87 in)
- Rear axle: oscillating for uneven terrain
- Pump: engine-driven external gear pump
- Flow output: 35-50 L/min (9-13 gpm)
- Maximum pressure: 15-18 MPa (2,175-2,610 psi)
- Hydraulic tank capacity: 22-30 L (23-32 qt)
- Oil type: ISO VG 32 / ISO VG 46
Cylinders:
- dual lift cylinders
- dual tilt cylinders with cushioning
- Control valves: mechanical proportional spool
| Service Refill Capacities |
- Engine oil: 4.0-4.5 L
- Cooling System: 7-9 L
- Transmission: 6-8 L
- Drive axle: 3.0-4.0 L
- Steer axle: 0.7-1.2 L
- Hydraulic reservoir: 22-30 L
Mast
configurations:
- Simplex (1-stage)
- Duplex (2-stage)
- Triplex (3-stage full free-lift)
Lift height options:
- Simplex: 2.5-3.0 m (98-118 in)
- Duplex: 3.0-4.0 m (118-157 in)
- Triplex: 4.0-5.0 m (157-197 in)
Fork specifications:
- Standard lengths: 920 mm (36 in), 1,070 mm (42 in)
- Optional: 1,220-1,829 mm (48-72 in)
- Fork width: 100-125 mm
- Fork thickness: 35-40 mm
- ITA fork class: Class II
- Rated capacity: 1,500 kg (3,300 lb)
- Load center: 500 mm (20 in)
Capacity derating occurs with:
- long forks
- high mast elevation
- heavy attachments
- side-shift offset
- off-center loads
- uneven surfaces
- Lift speed (unladen): 0.45-0.58 m/s
- Lift speed (laden): 0.25-0.38 m/s
- Lowering speed: 100-150 ft/min
- Gradeability (unladen): 18-25%
- Gradeability (laden): 10-18%
- Drawbar pull: 7,000-10,000 N (1,570-2,250 lbf)
- Overall length to fork face: 2.25-2.40 m (89-94 in)
- Overall width: 1.05-1.10 m (41-43 in)
- Overhead guard height: 2.00-2.10 m (79-83 in)
- Wheelbase: 1.40-1.50 m (55-59 in)
- Ground clearance: 110-140 mm (4.3-5.5 in)
- Carriage width: 900-1,000 mm (35-39 in)
- Turning radius: 2.0-2.2 m
- Aisle width (pallet 1000x1200): 3.1-3.4 m
- Maximum fork height: 2.5-5.0 m
- Free lift: 70-600 mm
- Fork lengths supported: 36-72 in
- Operating weight: 2,650-3,150 kg (5,840-6,940 lb)
- Counterweight: 1,200-1,500 kg (2,645-3,300 lb)
250-hour service:
- Replace engine oil and filter
- Inspect air filter
- Lubricate mast and steer axle
- Clean radiator fins
500-hour service:
- Replace Transmission fluid
- Inspect driveline and axle components
- Clean hydraulic suction strainer
1,000-hour service:
- Replace hydraulic oil and filters
- Replace coolant
- Inspect hoses, hydraulic cylinders, wiring harnesses
2,000-hour service:
- Full drivetrain inspection
- Steering linkage and alignment
- Structural mast and carriage inspection
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