Clark CGP40 Specifications
The Clark CGP40 is a mid-to-high capacity
pneumatic-tire internal-combustion forklift engineered for industrial operations
requiring dependable outdoor performance, strong lifting capability, and rugged
mechanical durability.
With a nominal lifting capacity of
approximately 4,000 kg (8,800 lb), the CGP40 is well suited for lumber
processing facilities, steel fabrication operations,
construction-material yards, agricultural processing depots,
manufacturing plants, freight terminals, and general industrial sectors
requiring reliable mid-heavy lifting in mixed terrain environments.
The CGP40 integrates a high-traction pneumatic-tire chassis, a
reinforced mast structure, durable industrial internal-combustion
engines, and a powershift transmission designed for repetitive direction
changes and high-load cycles. Operators benefit from an ergonomic cabin
layout with clear mast visibility, balanced steering, stable load
behavior, and minimized vibration transmission.
Maintenance personnel value the straightforward
engine access, simplified hydraulic routing, protected hose pathways,
durable drivetrain, and minimal electronic complexity. The forklift is
engineered to deliver stable load handling, consistent outdoor traction,
reliable performance under harsh environmental conditions, and long
operational service life with proper maintenance.
The Clark CGP40 is commonly equipped with industrial
gasoline or LPG engines optimized for moderate emissions, strong low-rpm torque,
and consistent performance during extended duty cycles. Typical engine families
include the Mitsubishi 4G64, GM/PSI 4.3L V6 LPG/Gasoline, and Nissan K25.
Mitsubishi 4G64 Industrial Gasoline/LPG:
- Configuration: inline 4-cyl, 4-stroke
- Displacement: approx. 2.4 L
- Power output: approx. 40-50 kW (54-67 hp)
- Torque: approx. 150-180 Nm (111-133 lb-ft)
- Rated speed: approx. 2,400-2,600 rpm
- Idle speed: approx. 650-750 rpm
GM/PSI 4.3L V6 Industrial:
- Displacement: approx. 4.3 L
- Power: approx. 70-85 kW (94-114 hp)
- Torque: approx. 220-280 Nm (162-207 lb-ft)
Nissan K25 LPG:
- Displacement: approx. 2.5 L
- Power output: approx. 45-55 kW (60-74 hp)
- Torque: approx. 150-170 Nm (111-125 lb-ft)
Engine Construction:
- Heavy-wall cast-iron block
- Cast-iron or aluminum cylinder head
- Forged-steel crankshaft supported by multiple main bearings
- Heat-resistant aluminum pistons with reinforced crowns
- Industrial valve train designed for extended service intervals
Fuel System:
- LPG vaporizer/regulator
- Mixer or EFI depending on model year
- Multi-stage fuel filtration
- Automatic safety shutoff valves
- Heavy-duty industrial air cleaner
Lubrication System:
- Type: full-pressure wet-sump
- Oil pump: gear-type
- Oil capacity: approx. 3.5-5.5 L (3.7-5.8 qt)
- Operating pressure: approx. 250-400 kPa (36-58 psi)
- Oil grade: SAE 10W-30 or 15W-40
- Replaceable spin-on oil filter
Cooling System:
- Liquid cooling with centrifugal water pump
- Coolant capacity: approx. 6-9 L (6.3-9.5 qt)
- Thermostat opens approx. 82°C (180°F)
- Heavy-duty fin-core radiator
- System pressure: approx. 13 psi (90 kPa)
The CGP40 uses a heavy-duty industrial powershift
transmission designed for high-load outdoor forklift cycles.
Transmission:
- Type: torque-converter powershift
- Forward speed (unladen): approx. 18-20 km/h (11-12.5 mph)
- Reverse speed (unladen): approx. 15-18 km/h (9-11 mph)
- Fluid capacity: approx. 10-12 L (10.5-12.7 qt)
- Fluid type: Dexron III ATF
- Direction control: steering-column mounted lever with hydraulic clutch packs
Drive Axle:
- Heavy cast-steel differential housing
- Planetary reduction hubs
- Axle lubricant capacity: approx. 6-9 L (6.3-9.5 qt)
- Lubricant grade: SAE 80W-90 or 85W-140
Brake System:
- Service brakes: hydraulic drum or optional wet-disc brakes
- Parking brake: mechanical lever-operated drum brake
- Brake performance optimized for outdoor surfaces and slopes
- System voltage: 12 V
- Battery capacity: approx. 70-100 Ah
- Alternator output: approx. 40-80 A
- Starter motor: approx. 1.8-2.5 kW
- Electrical harness: protected industrial-grade wiring
- Safety systems: neutral-start switch, operator-presence interlock
- Lighting: headlights, rear lamps, optional overhead work lamps
Drive
Configuration:
- Front-wheel drive
- Rear-wheel steering
- High-traction pneumatic tires for outdoor and mixed surfaces
Tire Specifications (Pneumatic):
- Front: approx. 28x12-16
- Rear: approx. 7.00x12
Optional Tires:
- Solid pneumatic
- Lug-type outdoor traction tires
- Non-marking tires for mixed indoor-outdoor duty
Chassis Structure:
- Fully welded high-strength steel frame
- Reinforced mast base and overhead guard
- Integrated heavy counterweight
- Protected routing for hydraulic and electrical systems
Steering:
- Fully hydrostatic power steering
- Steering pump flow: approx. 10-15 L/min (2.6-4.0 gpm)
- Rear-axle oscillation for terrain compliance
- Turning radius: approx. 2.4-2.7 m (94-106 in)
- Steering tuned for precise control under load
- Max pressure: approx. 2,200-2,500 psi (152-172 bar)
- Pump: engine-driven external gear pump
- Flow rate: approx. 40-55 L/min (10-14.5 gpm)
- Reservoir: approx. 30-40 L (32-42 qt)
- Fluid grade: ISO VG 32 or VG 46
- Lift cylinders: dual double-acting cylinders
- Tilt cylinders: twin cylinders with cushioning
- Auxiliary hydraulics: available for sideshift or clamp attachments
| Service Refill Capacities |
- Engine oil: approx. 3.5-5.5 L (3.7-5.8 qt)
- Coolant: approx. 6-9 L (6.3-9.5 qt)
- Transmission: approx. 10-12 L (10.5-12.7 qt)
- Drive axle: approx. 6-9 L (6.3-9.5 qt)
- Hydraulic oil: approx. 30-40 L (32-42 qt)
Mast Types:
- Two-stage (V mast)
- Three-stage (FV full free-lift mast)
Lift Heights:
- Duplex: approx. 3.0-4.0 m (118-157 in)
- Triplex: approx. 4.5-6.0 m (177-236 in)
Free Lift:
- Approx. 0.2-1.0 m (8-39 in)
Fork Specifications:
- Standard: 1,067-1,219 mm (42-48 in)
- Optional: up to 1,524 mm (60 in)
- Width: approx. 125-150 mm (5-6 in)
- Thickness: approx. 45-60 mm (1.8-2.4 in)
- Rated capacity: 4,000 kg (8,000-8,800 lb) at 600 mm
(24 in) load center
De-rating occurs with:
- increased mast height
- long forks
- attachments
- off-center loading
- sloped or uneven surfaces
- Lift speed (unladen): approx. 0.40-0.55 m/s (80-110
ft/min)
- Lift speed (laden): approx. 0.25-0.35 m/s (50-70 ft/min)
- Lowering speed (unladen): approx. 90-130 ft/min
- Lowering speed (laden): approx. 110-150 ft/min
- Travel speed (unladen): approx. 18-20 km/h (11-12.5 mph)
- Travel speed (laden): approx. 14-16 km/h (9-10 mph)
- Gradeability (unladen): approx. 22-28%
- Gradeability (laden): approx. 12-16%
- Drawbar pull: approx. 15,000-22,000 N (3,370-4,945 lb-force)
- Overall length to fork face: approx. 2.7-3.0 m
(106-118 in)
- Overall width: approx. 1.3-1.5 m (51-59 in)
- Overhead guard height: approx. 2.2-2.3 m (87-91 in)
- Wheelbase: approx. 1.7-1.9 m (67-75 in)
- Ground clearance: approx. 110-150 mm (4.3-6.0 in)
- Turning radius: approx. 2.4-2.7 m (94-106 in)
- Aisle width (1000x1200 pallet): approx. 4.0-4.4 m (157-173 in)
- Maximum fork height: 3.0-6.0 m depending on mast
- Free lift: 0.2-1.0 m
- Fork lengths: 42-60 in
- Operating weight: approx. 4,800-6,000 kg (10,582-13,228 lb)
- Counterweight mass: approx. 1,800-2,500 kg (3,968-5,512 lb)
250-Hour
Maintenance:
- Replace engine oil and filter
- Clean radiator fins
- Lubricate mast and steering linkages
- Clean or replace air filter
- Inspect battery
500-Hour Maintenance:
- Replace fuel filter
-.inspect driveline components
- Check brake shoes/drums or wet-disc systems
- Inspect axle seals
1,000-Hour Maintenance:
- Replace transmission oil
- Replace axle lubricant
- Inspect lift/tilt cylinders
- Check chain stretch
2,000-Hour Maintenance:
- Replace hydraulic oil
- Replace coolant
- Full mast structural inspection
- Test safety interlocks
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