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Cat® 990H Wheel Loader Features a Low-Emissions Engine, Advanced Cooling System and Enhanced Operator Station

Posted By admin On October 19, 2007 @ 12:00 am In Boomerang | No Comments

The Caterpillar® 990H wheel loader incorporates innovations to lower engine emissions, improve reliability, durability and serviceability, and optimize operator efficiency and comfort. The 990H replaces the 990G Series II and retains the best features, including its highly productive cycle times, ideal pass matches with standard sized haulers, impeller clutch torque converter and Rimpull Control System for superior operator control and optimum power to the ground, and STICTM control system for reduced operator effort. The 990 is a proven performer that delivers the lowest cost per ton in its size class.


The 990H is engineered for mining, bulk materials handling and high volume earthmoving. The machine is an aggressive face and bank loader that efficiently loads 60- to 70-ton (54- to 63-tonne) capacity trucks in the standard lift arrangement and 100-ton (91-tonne) capacity trucks in the high lift arrangement. Rated payload in the standard lift arrangement is 16.5 tons (15 tonnes) and operating weight is 171,642 pounds (77 842 kg). Bucket capacities range from 11.0 to 12.0 cubic yards (8.4 to 9.2 cubic meters).


New engine meets EPA and EU regulations


The Cat C27 engine, rated at 627 net horsepower (468 kW) features ACERT® Technology, an exclusive Cat emissions reduction solution. The 12-cylinder engine is a V configuration with displacement of 1,648 cubic inches (27 liters).  Key elements of ACERT Technology include:



  • A mechanically actuated, electronically controlled unit injection system that delivers micro-bursts of fuel to the combustion chamber just prior to and after the main injection for reduced emissions.
  • A 32-bit ADEMTM IV control system that manages the fuel injection process and other power train operations with precision and accuracy, reducing emissions, while boosting performance and maximizing component life.
  • A cross-flow cylinder head that brings more clean air into the combustion chamber and improves its distribution, ensuring a cleaner combustion process.

This combination of technologies makes the new Cat® C27 engine clean, quiet, fuel efficient and compliant with US Environmental Protection Agency Tier 3 standards and EU Stage IIIa standards. The C27 also offers 500-hour oil change intervals for reduced maintenance costs. Also, fewer mechanical parts boost reliability.


The 990H also features an air-to-air aftercooling (ATAAC) system to reduce the temperature of air feeding the engine intake. The cooled, compressed air reduces engine emissions and helps maintain performance at high altitudes and in high ambient temperatures.


The 990H power train also features the proven impeller clutch torque converter (ICTC). The system allows the operator to modulate rimpull efficiently using the left pedal for smooth loading cycles. In addition, the Rimpull Control System allows the operator to vary rimpull to match underfoot conditions by selecting one of four preset, reduced rimpull settings. The system optimizes productivity while reducing tire slippage, tire wear and costs.


Cooling system more efficient and easier to service


The next generation modular radiator (NGMR) is a Caterpillar technology that improves serviceability and increases cooling efficiency by 22 percent. NGMR routes coolant through the radiator twice for better cooling. Also, the modular core allows removal of a single module without removing the entire radiator. The result is reduced downtime and lower repair costs.


The cooling system design isolates the NGMR and the hydraulically driven, variable-speed cooling fan from the engine compartment, which allows the radiator to receive ambient air from outside rather than receiving heated air from the engine compartment. The design increases heat exchange while minimizing the size of the radiator. The radiator size allows the hood to be sloped for enhanced sight lines to the rear of the loader. Also, the efficient radiator allows the fan to run at lower speeds, which reduces sound levels, power demand and fuel consumption.


Comfortable operator station


The cab is spacious and provides superior visibility to the work area. Interior sound levels are below 75 dB(A). The Comfort Series seat has an air suspension and is adjustable to fit the operator. A trainer seat promotes proper operational and safety training.


The 990H retains the Steering and Transmission Integrated Control (STIC) system that enables the operator to use small movements of a single hand to steer and to make direction and gear changes. STIC enables smooth operation with minimum effort.


The Electronic Monitoring System III (EMS III) continually monitors machine systems and provides a three-level warning system to alert the operator of problems. EMS III stores and shares information with machine systems so that it can be used by a technician to simplify diagnostics and service.


For more information about the 990H wheel loader, customers should contact the local Cat dealer.



Brief Specifications Cat 990H Wheel Loader














































Engine model 


Cat C27 ACERT


Gross power


687 hp (512 kW)


Net power (Caterpillar)


627 hp (468 kW)


Rated payload


16.5 tons (15 tonnes)


Bucket capacities


11.0-12.0 cu yd
(8.4-9.2 cu meters)


Dump clearance at 45 degree dump,
Standard linkage


13 ft 9 in. (4135 mm)


Reach at max. lift/dump, std. linkage


5 ft 11 in. (1799 mm)


Dump clearance at 45 degree dump,
High lift


14 ft 10 in. (4518 mm)


Reach at max. lift/dump, high lift


8 ft 4 in. (2540 mm)


Tipping load (std.)
  – Straight
  – Full turn, 35 degrees


 


93,457 (43 392)
84,311 (38 243)


Breakout force*
     Standard
     High lift


 


133,650 lb (594 kN)
126,225 lb (561 kN)


Overall length (std.)


42 ft 2 in. (12 839 mm)


Turning circle (std.)


68 ft 2 in. (20 740 mm)


Operating weight (std.)


171,642 lb (77 842 mm)






*Buckets are spade edge with teeth and segments

CAT, CATERPILLAR, their respective logos, Caterpillar Yellow and the POWER EDGE trade dress, as well as corporate and product identity used herein, are trademarks of Caterpillar and may not be used without permission.


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