Forklifts and telehandlers specifications and technical data
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Cat GC40K STR Specifications

Basic Information

The Caterpillar GC40K STR is a 4,000 kg capacity LPG-powered cushion tire forklift engineered for high-performance indoor material handling in warehouses and distribution centers. The STR designation indicates Short Turn Radius, achieved through extra-heavy lead-filled counterweights that provide superior turning agility with a 6.9 ft turning radius, facilitating enhanced maneuverability in tight operational environments. This model is available with either a PSI 4X six-cylinder engine producing 78 kW or a GM V6 engine delivering 69 kW, both configured for LPG operation.

The GC40K STR features a powershift transmission with 1/1 forward/reverse speeds, a robust hydraulic system with 200 bar operating pressure, and cushion tires for exceptional ride quality and floor protection. With its compact dimensions, including 1180 mm overall width and 2090 mm turning radius, this forklift navigates narrow aisles efficiently while maintaining stability through its 1575 mm wheelbase. The operator compartment includes hydraulic steering, vacuum-boosted brakes, and diagnostic displays for system monitoring.

Engine Specs

Engine Manufacturer / Model: PSI 4X
Power Type: LPG (Liquefied Petroleum Gas)
Rated Output (ISO 1585): 78.0 kW (104.6 hp) @ 2,600 rpm
Number of Cylinders: 6
Displacement: 4.3 L (262 cu in)
Basic Technical Data (Optional Engine)
Engine Manufacturer / Model: GM V6
Rated Output (ISO 1585): 69.0 kW (92.5 hp) @ 2,450 rpm
Maximum Torque: 298 Nm (220 lb-ft) @ 1,200 rpm
Number of Cylinders: 6
Displacement: 4.3 L (262 cu in)
Fuel System: LPG with dedicated fuel system

Lubrication System Type: Pressure lubrication with full-flow filtration
Oil Capacity: 6.5 L (6.9 US qt)
Recommended Oil: API service class SF or higher, SAE 10W-30

Cooling System Type: Pressurized, water-cooled with centrifugal pump
Coolant Capacity: 12.0 L (12.7 US qt)

Drive Train

Transmission Type: Powershift transmission
Drive Control Type: Powershift with torque converter
Number of Speeds Forward / Reverse: 1 / 1
Travel Speed (with load): 19.0 km/h (11.8 mph)
Travel Speed (without load): 19.5 km/h (12.1 mph)
Drive Axle (Front): Heavy-duty design with planetary reduction
Steer Axle (Rear): Robust construction with oscillating capability
Service Brake Type: Hydraulic, vacuum-boosted
Parking Brake Type: Mechanical, hand-operated

Electrical System

System Voltage: 12 V
Battery: Heavy-duty commercial type
Alternator: High-output
Starting System: Electric starter with ignition system

Wheels and Tires

Wheel Configuration (x = driven): 2x front / 2 rear
Number of Wheels Front / Rear: 2 / 2
Tire Type: Solid (cushion)
Tire Size (front): 22x9x16
Tire Size (rear): 18x7x12.1

Steering Type: Hydraulic power steering
Steering System: Fully hydraulic with power assist

Hydraulic System

Hydraulic Pump Type: Gear pump
Hydraulic System Design: High-efficiency, direct-drive
Maximum Operating Pressure for Attachments: 200 bar (2,900 psi)
Oil Flow for Attachments: 95 L/min (25.1 gpm)
Control Valves: Precision metering for smooth operation
Hydraulic Fluid Capacity: 50.0 L (52.8 US qt)

Service Refill Capacities

Engine Oil: 6.5 L (6.9 US qt)
Cooling System: 12.0 L (12.7 US qt)
Hydraulic System: 50.0 L (52.8 US qt)
Transmission: 8.0 L (8.5 US qt)
Drive Axle: 4.0 L (4.2 US qt)

Mast Data

Mast Type Available: Two-stage (simplex) or three-stage (triplex)
Mast Lowered Height (simplex): 2,120 mm (83.5 in)
Lift Height (standard, simplex): 3,050 mm (120.1 in)
Lift Height (three-stage, optional): Up to 5,310 mm (209 in)
Overall Height with Mast Raised (simplex): 4,250 mm (167.3 in)
Free Lift (simplex): 150 mm (5.9 in)
Mast Tilt (forwards / backwards): 5° / 10°
Mast Design: Compact design for excellent visibility
Fork Carriage Type: DIN 15173 Class 3A
Fork Carriage Width: 1,125 mm (44.3 in)
Fork Dimensions (thickness x width x length): 50x150x1,220 mm (2.0x5.9x48.0 in)
Fork Length: 48.0 in (1,220 mm)
Fork Spread (maximum): 41.0 in (1,040 mm)
Side Shift: Available as standard on many configurations
Full Free Lift: Available on three-stage masts

Load Capacity

Load Capacity (rated): 4,000 kg (8,820 lb)
Load Center Distance: 500 mm (19.7 in)

Performance Data

Lifting Speed (with load): 0.54 m/s (106 fpm)
Lifting Speed (without load): 0.57 m/s (112 fpm)
Lowering Speed (with load): 0.55 m/s (108 fpm)
Lowering Speed (without load): 0.50 m/s (98 fpm)
Rated Drawbar Pull (with/without load): 23,780 N (5,345 lb)
Gradeability (with load): 32%
Gradeability (without load): 32%

Dimensions and Weight

Overall Length: 3,630 mm (142.9 in)
Length to Fork Face: 2,410 mm (94.9 in)
Overall Width: 1,180 mm (46.5 in)
Height to Top of Overhead Guard: 2,205 mm (86.8 in)
Height (with lowered mast): 2,120 mm (83.5 in)
Height (with extended mast, simplex): 4,250 mm (167.3 in)
Height (with extended mast, triplex): Up to 5,310 mm (209 in)
Wheelbase: 1,575 mm (62.0 in)
Track Width (front, center of tyres): 940 mm (37.0 in)
Track Width (rear, center of tyres): 980 mm (38.6 in)
Ground Clearance (under mast, with load): 100 mm (3.9 in)
Ground Clearance (at center of wheelbase, with load, forks lowered): 150 mm (5.9 in)
Load Distance (axle to fork face): 450 mm (17.7 in)
Seat Height: 1,200 mm (47.2 in)
Turning Circle Radius: 2,090 mm (82.3 in)
Working Aisle Width (with 1000 x 1200 mm pallets, crosswise): 3,740 mm (147.2 in)
Working Aisle Width (with 800 x 1200 mm pallets, crosswise): 3,540 mm (139.4 in)
Truck Weight (without load, simplex mast, lowest lift height): 5,655 kg (12,470 lb)
Axle Loading with Max Load (front / rear): 8,630 kg / 1,025 kg (19,025 lb / 2,260 lb)
Axle Loading without Load (front / rear): 2,190 kg / 3,465 kg (4,830 lb / 7,640 lb)

Maintenance Data

Engine Oil and Filter Change: Every 250 hours or 3 months
Engine Air Filter Element: As indicated by restriction gauge (check daily)
Fuel Filter Replacement: Every 500 hours or 6 months
Hydraulic Oil Filter Replacement: Every 1,000 hours
Hydraulic Oil Change: Every 2,000 hours
Transmission Fluid and Filter Change: Every 1,000 hours
Drive Axle Oil Change: Every 1,000 hours
Coolant Change: Every 2,000 hours or 2 years
Chassis Greasing: Every 50 hours or weekly

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