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Grove TMS640 Truck-Mounted Telescopic Crane Overview
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Crane Capacity and Boom
  • The Grove TMS640 is a 40-ton capacity truck-mounted telescopic boom crane.
  • Equipped with a four-section full-power telescoping boom extending from 34 ft (10.4 m) up to 105 ft (32 m).
  • Includes a telescopic swing-away jib extending an additional 51 ft (15.5 m), enhancing reach and lifting versatility.
  • Maximum total reach can exceed 150 ft with boom and jib combined.
Engine and Performance
  • Powered by a Cummins 6CTA 8.3L six-cylinder turbocharged diesel engine.
  • Engine delivers approximately 250 hp at 2400 rpm and 660 lb-ft torque at 1300 rpm, providing robust power for boom operation and travel.
  • The crane features an 8x4 truck chassis configuration enabling highway travel speeds up to 50 mph (80 km/h).
  • Integrated suspension and shock absorber systems enhance operator comfort even at full speed.
Dimensions and Features
  • Overall crane length is approximately 41 ft.
  • Width stands around 10.7 ft.
  • Height measures about 13.3 ft.
  • Equipped with an advanced operator cab featuring sliding windows, electric windshield wash and wipers, and gauges monitoring all engine functions.
  • The crane offers 360° continuous rotation with hydraulic controls providing smooth boom and slewing movements.
  • Outriggers provide stabilization for safe operation with up to 85% stability on outriggers and 75% on tires.
Hydraulics and Controls
  • Hydraulics deliver approximately 200 to 201 gallons per minute flow.
  • Roadranger transmission with 13 forward and 3 reverse gears provides smooth travel.
  • Boom controls include electro-proportional joystick operation for precise movement.
  • Load moment indicators and safety systems help prevent overload and tip-overs.
Applications
  • Commonly used in infrastructure, construction, and industrial projects requiring flexible lifting with on-road mobility.
  • Fast set-up times and maneuverability make it suitable for urban and constrained environments.
  • Lifts heavy loads at extended reaches for structural steel, utilities, and equipment placement.
Terminology
  • Telescopic Boom: A boom with sections that extend and retract to customize length.
  • Swing-Away Jib: An additional movable boom section that increases reach.
  • Load Moment Indicator: Safety device monitoring crane load and boom angle to prevent overload.
  • Electro-Proportional Controls: Joystick systems that provide variable speed control for hydraulic functions.
  • Roadranger Transmission: Heavy-duty multi-gear transmission designed for trucks.
Real-World Insight
Operators praise the Grove TMS640 for its excellent boom reach combined with truck-like road travel speed. Maintenance of Cummins engines and load sensors ensures prolonged machine life amid diverse job site demands.
Conclusion
The Grove TMS640 truck-mounted crane is a powerful and versatile solution for heavy lifting combined with road transport capability. Its well-engineered hydraulic system, strong diesel engine, and operator-friendly features make it a reliable choice in demanding lifting operations. Proper maintenance and operator training maximize safety and efficiency with this 40-ton class crane.
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