844H Wheel Dozer

aggmanstaff

November 15, 2007

Engineered for demanding work in large dozing applications, the Cat 844H Wheel Dozer is an ideal match for power generating utilities, clean up, road maintenance and production dozing at mines industry.


 


 



 


 





























































































































































































































































































































































































































Engine

Units:  US 


Engine Model


Cat® 27 ACERT



Gross Power


687 hp



Flywheel Power


627 hp



Flywheel Power – Caterpillar


627 hp



Net Power


627 hp



Flywheel Power – EEC 80/1269


627 hp



Flywheel Power – ISO 9249


627 hp



Flywheel Power – SAE J1349 (JAN90)


621 hp



Flywheel Power – DIN 70020


650 PS



Bore


5.4 in



Stroke


6 in



Displacement


1666 in3



Cylinders


12



Torque Rise


31 %




Weights



Operating Weight


156120 lb




Operating Specifications



Blade Capacities


15.9-30.7 m3 20.7-40.2 yd3



Ground Clearance


1.56 ft




Transmission



Converter Drive – Forward 1


4.4 mph



Converter Drive – Forward 2


7.6 mph



Converter Drive – Forward 3


13 mph



Converter Drive – Reverse 1


4.8 mph



Converter Drive – Reverse 2


8.4 mph



Converter Drive – Reverse 3


14.3 mph



Direct Drive – Forward 1


4.5 mph



Direct Drive – Forward 2


7.9 mph



Direct Drive – Forward 3


14 mph



Direct Drive – Reverse 1


4.9 mph



Direct Drive – Reverse 2


8.8 mph



Direct Drive – Reverse 3


15.4 mph



Number of Forward Speeds


3



Number of Reverse Speeds


3




Hydraulic System



Output at 2040 rpm and 6900 kPa (1000 psi)


82 gal/min



Cylinder, Double-Acting: Tilt and Tip, Bore and Stroke


209.5 mm x 188 mm 8.25 in x 7.5 in



Relief Valve Setting – Bulldozer (Large Pump)


2700 psi



Relief Valve Setting – Tilt Cylinders (Small Pump)


2920 psi




Steering



Minimum Turning Radius (Over Tires)


390 in



Hydraulic ouput at 2040 rpm and 6900 kPa (1000 psi)


93 gal/min



Relief Valve Setting


5000 psi



Steering Angle


35 Degrees




Service Refill Capacities



Fuel Tank – Standard


268.4 gal



Cooling System


39.6 gal



Crankcase


25 gal



Transmission


29 gal



Hydraulic Tank


189.4 gal



Differentials and Final Drives – Front


71.6 gal



Differentials and Final Drives – Rear


68.9 gal



Hydraulic System – Implement and Brakes (Tank Only)


52 gal



Hydraulic System – Steering and Engine Cooling Fan (Tank Only)


34.9 gal




Cab



ROPS/FOPS


Meets SAE and ISO standards.



Sound Performance Levels


Meets ANSI, SAE and ISO standards.




Axles



Front


Fixed



Rear


Oscillating ±11°



Maximum Single-Wheel Rise and Fall


22.5 in




Brakes



Brakes


Meets SAE/ISO 3450 1996.




Tires



Tire Choices


Several choices available.



Standard Tire Size


45/65 R39

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