Cat GP15K Specifications
The Caterpillar GP15K is a compact 1.5-ton (1,500 kg /
3,300 lb) internal-combustion pneumatic-tire forklift equipped with the
Mitsubishi 4G63 industrial spark-ignition engine. Designed for light-to-medium
industrial applications, the GP15K provides excellent maneuverability, low fuel
consumption, clean emissions, and consistent load-handling capability in
warehouses, logistics zones, fabrication areas, retail distribution centers, and
mixed indoor/outdoor work environments.
The GP15K emphasizes a compact chassis footprint, reliable hydraulic
performance, balanced counterweight design, and ergonomic operator layout. Its
Mitsubishi 4G63 engine offers smooth throttle response, steady torque delivery,
low vibration, favorable service intervals, and dependable cold-start
characteristics.
The GP15K’s reinforced welded-steel frame,
industrial powershift transmission, hydrostatic steering, and
high-visibility mast support precise and predictable operator control.
Maintenance personnel benefit from wide-opening engine covers, logical
component placement, centralized filters, and straightforward
diagnostics.
The Caterpillar GP15K is powered by the Mitsubishi 4G63
industrial engine, adapted for LPG or gasoline use depending on application.
Mitsubishi 4G63 - Basic Technical
Specifications:
- Engine type: inline 4-cylinder, 4-stroke, gasoline/LPG spark-ignition
- Displacement: 2.0 liters (1,995 cc)
- Bore x stroke: approx. 85 x 88 mm (3.35 x 3.46 in)
- Maximum industrial output: approx. 35-45 kW (47-60 hp) @ 2,300-2,600 rpm
- Peak torque: approx. 135-160 Nm (100-118 lb-ft) @ 1,600-1,800 rpm
- Fuel systems: mixer-type LPG or gasoline EFI (regional dependent)
- Aspiration: naturally aspirated
- Ignition: electronic distributor or distributorless industrial ignition
- Idle speed: approx. 750 ± 50 rpm
The 4G63 is widely proven in industrial equipment for its torque stability,
reliability, and smooth combustion.
Lubrication System:
- Type: full-pressure wet-sump
- Oil pump: gear-type
- Oil capacity: approx. 3.7-4.5 L (3.9-4.8 qt)
- Oil pressure: approx. 300-450 kPa (44-65 psi)
- Oil grade: SAE 10W-30 or 15W-40 (API SJ/SL/SM)
- Filtration: spin-on full-flow filter
Cooling System:
- Cooling method: liquid-cooled
- Coolant capacity: approx. 6-8 L (6.3-8.4 qt)
- Thermostat opening: approx. 82°C (180°F)
- Fully open: approx. 95°C (203°F)
- Radiator: industrial fin-tube core
- Cooling fan: mechanical engine-driven
- Water pump: belt-driven centrifugal
- System pressure: approx. 88-108 kPa (13-16 psi).
Transmission:
- Type: industrial powershift
- Forward speeds: 1-2
- Reverse speeds: 1-2
- Travel speed unladen: approx. 17-18 km/h (10-11 mph)
- Travel speed laden: approx. 15-16 km/h (9-10 mph)
- Transmission oil capacity: approx. 6-8 L (6.3-8.4 qt)
- Recommended fluid: Dexron III ATF
- Transmission cooling: integral oil-to-air cooler
Front Drive Axle:
- Type: rigid industrial drive axle
- Differential: bevel-gear
- Axle oil capacity: approx. 3.5-5.0 L (3.7-5.3 qt)
- Lubricant: SAE 80W-90 gear oil
Rear Steering Axle:
- Type: oscillating center-pivot
- Oscillation range: approx. ±8-10 degrees
- Lubricant capacity: approx. 1.0-1.5 L
Braking System:
- Service brakes: hydraulic drum brakes with dual-leading-shoe design
- Parking brake: mechanical hand-lever drum brake
- Brake actuation: hydraulic master cylinder.
- System voltage: 12 V
- Battery capacity: approx. 70-90 Ah
- Alternator output: approx. 40-60 A
- Starter motor: approx. 1.8-2.5 kW
- Electrical harness: sealed connectors with protected conduit routing
Instrument panel indicators:
- oil pressure
- coolant temperature
- charging system
- LPG fuel level
- hour meter
- parking brake indicator.
Drive
Configuration:
- Drive wheels: front
- Steering wheels: rear
- Drive: 2-wheel drive
Tire Specifications (Pneumatic):
- Front tires: approx. 6.50x10
- Rear tires: approx. 5.00x8
- Optional tires: solid pneumatic, non-marking compounds
Chassis Construction:
- Heavy-duty welded steel frame
- Integrated counterweight
- Reinforced overhead guard
- Anti-slip step plates and handholds
- Protected hydraulic and electrical line routing
Steering:
- Type: fully hydrostatic steering
- Steering pump flow: approx. 6-10 L/min (1.5-2.6 gpm)
- Steering cylinder: double-acting
- Steer axle: oscillating center-pivot
- Turning radius: approx. 1.8-2.0 m (71-79 in).
- Pump type: engine-driven gear pump
- Flow rate: approx. 35-55 L/min (9-14.5 gpm)
- System pressure: approx. 17-19 MPa (2,500-2,750 psi)
- Hydraulic reservoir: approx. 20-28 L (21-30 qt)
- Hydraulic oil: ISO VG 32 or VG 46
- Lift cylinders: dual double-acting
- Tilt cylinders: dual with cushioning features
Optional Attachments:
- Side-shift
- Fork-positioner
- Rotator
- Clamp attachments
- Push-pull devices.
| Service Refill Capacities |
- Engine oil: 3.7-4.5 L
- Coolant system: 6-8 L
- Transmission: 6-8 L
- Drive axle: 3.5-5.0 L
- Steer axle: 1.0-1.5 L
- Hydraulic tank: 20-28 L
Mast Types:
- Simplex (1-stage)
- Duplex (2-stage)
- Triplex (3-stage full free-lift)
Lift Heights:
- Simplex: 2.5-3.0 m (98-118 in)
- Duplex: 3.0-4.5 m (118-177 in)
- Triplex: 4.5-6.0 m (177-236 in)
Free Lift: 80-600 mm (3-24 in)
Carriage Width: 850-950 mm (33-37 in)
Fork Specifications:
- Standard fork lengths: 1,070 mm (42 in) or 1,220 mm (48 in)
- Optional fork lengths: 914-1,829 mm (36-72 in)
- Fork width: approx. 100-125 mm (4-5 in)
- Fork thickness: approx. 35-45 mm (1.4-1.8 in)
- Fork class: ITA Class II.
- Rated capacity: 1,500 kg (3,300 lb)
- Load center: 500-600 mm (20-24 in)
Capacity reduction factors include:
- mast height increase
- long forks
- attachments installed
- off-center loads
- slope operation.
- Lift speed (unladen): approx. 0.45-0.55 m/s
- Lift speed (laden): approx. 0.28-0.40 m/s
- Lowering speed: approx. 110-150 ft/min
- Gradeability (unladen): approx. 18-22%
- Gradeability (laden): approx. 12-18%
- Drawbar pull: approx. 10,000-14,000 N.
- Length to fork face: approx. 2.1-2.3 m (83-91 in)
- Overall width: approx. 1.05-1.12 m (41-44 in)
- Overhead guard height: approx. 2.1-2.2 m (83-87 in)
- Wheelbase: approx. 1.35-1.45 m (53-57 in)
- Ground clearance: approx. 90-110 mm (3.5-4.3 in)
- Turning radius: approx. 1.8-2.0 m (71-79 in)
- Aisle width (1000x1200 pallet): approx. 3.1-3.4 m (122-134 in)
- Max fork height: 2.5-6.0 m
- Free lift: 80-600 mm
- Fork lengths: 36-72 in
- Operating weight: approx. 2,900-3,300 kg (6,390-7,275 lb)
- Counterweight mass: approx. 1,200-1,500 kg (2,645-3,300 lb).
250-Hour Interval:
- Replace engine oil and filter
- Lubricate mast channels and steer joints
- Clean radiator fins
- Check air filter
500-Hour Interval:
- Replace transmission fluid
- Inspect axle seals
- Clean hydraulic suction filter
1,000-Hour Interval:
- Replace hydraulic oil and filters
- Replace coolant
- Inspect hoses, cylinder seals, driveline
2,000-Hour Interval:
- Perform drivetrain inspection
- Steering alignment check
- Mast structural evaluation.
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