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Caterpillar® 904H Compact Wheel Loader Features Refined Performance, Versatility and Low Emissions

Posted By admin On October 31, 2008 @ 12:00 am In Boomerang | No Comments

The new Caterpillar® 904H compact wheel loader provides a productive combination of power, versatility and operator amenities. With 52 net horsepower (39 kW) and an operating weight of 9,900 pounds (4490 kg), the 904H replaces the popular 904B.


The new loader features a new engine, new axles, articulated steering, two-speed hydrostatic drive, powerful Z-bar loader linkage, universal coupler (compatible with skid-steer-loader work tools), new operator™s station and fresh styling”including a new hood, counterweight and non-metallic fenders.  


Designed for reduced exhaust emissions, the 904H uses the turbocharged MHI S4Q2 diesel engine, which meets Interim Tier 4 regulations. The new engine powers a closed loop, single path hydrostatic transmission that works in combination with a frame mounted gear box and mechanical axles. The newly designed axles provide more ground clearance and can be equipped with optional locking differentials to help the 904H power through adverse ground conditions.


Available with either cab or canopy, the new 904H operator station is designed for comfort and convenience”featuring ample space, enhanced visibility and redesigned controls. Optional performance features, including ride control and creeper control, allow more precise operation of the machine. Routine maintenance for the 904H is simplified with a tilt-up engine enclosure for easy access to service points, centralized lubrication, hinged oil cooler and standard oil sampling valves for quickly sampling engine and drive-train fluids.
 
Powerful, versatile loader
The new machine™s Z-bar loader linkage provides ample lift height and reach, while generating high bucket breakout forces (8,003 pounds/ 35.6 kN), allowing the 904H to take on difficult loading and lifting chores. Wide spacing of the robust lift arms and the geometry of the loader linkage yield exceptionally good visibility to the work site and to the work tool. The 904H has a maximum hydraulic lift capacity of 7,464 pounds (33.2 kN).


The 904H is available with a choice of couplers, a standard mechanical version or an optional hydraulic version, which allows switching non-powered work tools from the cab. The universal-style coupler is designed to handle a variety of buckets, pallet forks and a wide selection of standard-flow work tools available for Caterpillar skid steer loaders and multi terrain loaders, including brooms, cold planers, augers, stump grinders and trenchers. The versatility of the 904H allows it to be integrated easily into skid-steer-loader fleets.


The standard auxiliary hydraulic system, with a rated flow of 22 gpm (83 L/min) at a relief pressure of 3,000 psi (207 bar), generates ample hydraulic horsepower for efficiently operating powered work tools.


Drive train advantages
The drive system provides smooth acceleration and deceleration, plus precise inching operation”features that enhance machine control and reduce operator fatigue. The optional creeper control complements the auxiliary hydraulic system by allowing the 904H to travel at low ground speeds in order to maintain precise control of powered work tools, while the engine runs at high speed to develop maximum hydraulic horsepower for efficient tool operation. An optional hand throttle further adds to controllability.


New for the 904H are optional locking differentials”for both the front axle and oscillating rear axle. Compared with the limited-slip differentials available for the 904B, the locking differentials reflect a simpler design, having fewer wearing components and providing positive engagement. Benefits of the new differentials include enhanced traction with reduced tire wear and reduced fuel consumption. As an added advantage, the differential locks can be engaged on-the-go at speeds up to 3.1 mph (5 kph).


Comfortable, convenient operator station
A newly designed loader-control joystick incorporates both a new, easy-to-use rocker switch for making directional shifts, plus a new controller for the auxiliary hydraulic system that allows enhanced proportional metering for safe, efficient work tool operation. The low effort, pilot hydraulic joystick assures that the loader control system operates smoothly, and a wrist rest behind the joystick provides comfortable support for significantly reducing arm fatigue. Reduced effort steering also contributes to less operator fatigue.


The left control console has been redesigned to simplify control, and repositioning the console allows easier access into the operator station. An LED dash monitors machine performance, and sealed switches are reliable and durable. Raised pedals are easy to use, prevent dirt from being trapped and allow easy cleaning of the flat floor.
 
Cab-equipped models feature a new right window that locks back at 180 degrees, and a rear window defroster that enhances visibility in inclement weather. Floor-length windows, the compact dash and the new sloped hood further ensure good, all-around visibility. Air conditioning is optional for the cab-equipped 904H. Also available is a ride control system, which uses accumulators in the boom lift circuit to smooth machine operation when traveling with a loaded bucket, thus reducing material spillage and allowing faster transport speeds.


For more information about the 904H, contact your local Cat® dealer or go to www.cat.com


904H/904B Compact Wheel Loader Specifications Comparison











































 


904B


904H


Net power


52 hp (39 kW)


52 hp (39 kW)


Operating weight


9,810 lb (4450 kg)


9,900 lb (4490 kg)


Bucket capacity, GP


0.78 yd3 (0.6 m3)


0.78 yd3 (0.6 m3)


Static tip load (full turn w/bucket)


5,511 lb (2500 kg)


5,511 lb (2500 kg)


Rated operating load (full turn w/bucket)


2,756 lb (1250 kg)


2,756 lb (1250 kg)


Rated operating load (full turn w/ forks)


3,527 lb (1600 kg)


3,527 lb (1600 kg)


Maximum dump height (at full dump angle)


94 in. (2390 mm)


94 in. (2390 mm)


Height over cab


94 in. (2390 mm)


94 in. (2390 mm)



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