Mining Trucks Is Specifically Designed For High-Volume Surface Mining
The Terex | Unit Rig MT 3700AC : Is Specifically Designed For High-Volume Surface MiningMining Trucks | 205 Short Ton (186 metric ton) Payload Capacity
Durable Construction
A rugged, durably constructed frame is the key element to a long haul truck life. The MT 3700AC features a straight rail design to eliminate sources of stress concentration such as bends and breaks.
It boasts a double box section construction utilizing high-strength, low alloy, controlled rolled steel. This material simplifies welding procedures and reduces hydrogen embitterment during welding. A submerged arc welding process further reduces stress with full-penetration weld joints. This process translates into a 36% increase in the endurance limit, which translates into a 400% increase in the fatigue life of the weld joint. The critical areas of the frame feature deep section main rails to reduce stress by 50%, which can increase the fatigue life of the frame by 800%. The tubular center cross beam with integral hoist cylinder and axle box attachment eliminates torsional and eccentric loads associated with conventional designs. The axle box attachment features a replaceable bearing surface that is lubricated, sealed and integrated into the cross member for easy access and maintenance. The MT 3700AC axle box features a new stress skin design that eliminates some internal structure and saves up to 700 lb (315 kg) of weight. And, the nose cone attachment uses a patented large two piece bearing, which reduces contact pressure on the bearing to less than 1400 psi (9 653 kPa) and extends bearing life. In addition, a panhard bar lateral support provides simple, easy to maintain lateral stabilization for the rear axle.
Solid Body
The MT 3700AC offers a horizontal bolster design which absorbs more impact energy for reduced body side damage. This unique design also simplifies construction, and saves up to 1,000 lb (454 kg) over conventional vertical bolster designs. A patented floor bolster to dump body floor rail joint also eliminates a high stress area in the body construction and allows increased structural flexibility, thereby improving the fatigue life of the body.
Clear Vision
The Unit Rig integrated ROPS Cab provides a wrap-around windshield for maximum visibility, and meets the SAE J1040 force and energy requirements. It features an efficient interior with room for two full size seats, back-lit cab instrumentation to reduce eyestrain, and a pressurized and fresh air filtration system to reduce dust contamination and keep drivers comfortable and productive. In addition, a sound abatement package reduces the noise level in the cab to a sound exposure Leg (equivalent sound level) of less than 82 dB(A) when tested per ANSI/SAE J1166 MAY90.
Smooth Ride
The independent front beam axle provides the MT 3700AC with the smoothest ride in mining. The axle is pin connected to the main frame with four drag links and two suspensions plus a pan hard rod for lateral stability. This arrangement reduces stress loads to the frame by 50%. In addition all steering components are mounted directly to the front axle for simplicity with fewer moving parts. For ease of maintenance all components are easily accessible, and the oversized wheel bearings feature a projected life of 20,000 hours. The independent front beam axle provides true tire tracking regardless of suspension stroke for improved handling, maneuverability, and extended tire life. The king pin in close proximity to the tire center line to reduce tire scrubbing, and absorb steering forces.
Other Info can read : http://www.terexunitrig.com/brochures/mt_3700ac.pdfA rugged, durably constructed frame is the key element to a long haul truck life. The MT 3700AC features a straight rail design to eliminate sources of stress concentration such as bends and breaks.
It boasts a double box section construction utilizing high-strength, low alloy, controlled rolled steel. This material simplifies welding procedures and reduces hydrogen embitterment during welding. A submerged arc welding process further reduces stress with full-penetration weld joints. This process translates into a 36% increase in the endurance limit, which translates into a 400% increase in the fatigue life of the weld joint. The critical areas of the frame feature deep section main rails to reduce stress by 50%, which can increase the fatigue life of the frame by 800%. The tubular center cross beam with integral hoist cylinder and axle box attachment eliminates torsional and eccentric loads associated with conventional designs. The axle box attachment features a replaceable bearing surface that is lubricated, sealed and integrated into the cross member for easy access and maintenance. The MT 3700AC axle box features a new stress skin design that eliminates some internal structure and saves up to 700 lb (315 kg) of weight. And, the nose cone attachment uses a patented large two piece bearing, which reduces contact pressure on the bearing to less than 1400 psi (9 653 kPa) and extends bearing life. In addition, a panhard bar lateral support provides simple, easy to maintain lateral stabilization for the rear axle.
Solid Body
The MT 3700AC offers a horizontal bolster design which absorbs more impact energy for reduced body side damage. This unique design also simplifies construction, and saves up to 1,000 lb (454 kg) over conventional vertical bolster designs. A patented floor bolster to dump body floor rail joint also eliminates a high stress area in the body construction and allows increased structural flexibility, thereby improving the fatigue life of the body.
Clear Vision
The Unit Rig integrated ROPS Cab provides a wrap-around windshield for maximum visibility, and meets the SAE J1040 force and energy requirements. It features an efficient interior with room for two full size seats, back-lit cab instrumentation to reduce eyestrain, and a pressurized and fresh air filtration system to reduce dust contamination and keep drivers comfortable and productive. In addition, a sound abatement package reduces the noise level in the cab to a sound exposure Leg (equivalent sound level) of less than 82 dB(A) when tested per ANSI/SAE J1166 MAY90.
Smooth Ride
The independent front beam axle provides the MT 3700AC with the smoothest ride in mining. The axle is pin connected to the main frame with four drag links and two suspensions plus a pan hard rod for lateral stability. This arrangement reduces stress loads to the frame by 50%. In addition all steering components are mounted directly to the front axle for simplicity with fewer moving parts. For ease of maintenance all components are easily accessible, and the oversized wheel bearings feature a projected life of 20,000 hours. The independent front beam axle provides true tire tracking regardless of suspension stroke for improved handling, maneuverability, and extended tire life. The king pin in close proximity to the tire center line to reduce tire scrubbing, and absorb steering forces.
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