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Overview

The Cat® 844H Wheel Dozer continues the Caterpillar tradition with its power, mobility, operator comfort and blade selection that allows you to get the job done quickly and economically. The 844H is ideally suited for the rugged duties associated with mining, quarries and utilities.

Engine

Units:
Engine Model Cat® C27 ACERT® Cat® C27 ACERT® Less
Gross Power 687.0 HP 512.0 kW Less
Net Power 627.0 HP 468.0 kW Less
Bore 5.4 in 137.0 mm Less
Stroke 6.0 in 152.0 mm Less
Displacement 1666.0 in³ 27.1 l Less
Cylinders 12 12 Less
Torque Rise 31.0 % 31.0 % Less
Net Power - DIN 70020 650 PS 650 PS Less
Net Power - EEC 80/1269 627.0 HP 468.0 kW Less
Net Power - ISO 14396 669.0 HP 499.0 kW Less
Net Power - ISO 9249 627.0 HP 468.0 kW Less
Net Power - SAE J1349 (JAN90) 621.0 HP 463.0 kW Less

Weights

Operating Weight 156120.0 lb 70815.0 kg Less

Transmission

Converter Drive - Forward 1 4.4 mile/h 7.0 km/h Less
Converter Drive - Forward 2 7.6 mile/h 12.2 km/h Less
Converter Drive - Forward 3 13.0 mile/h 21.0 km/h Less
Converter Drive - Reverse 1 4.8 mile/h 7.7 km/h Less
Converter Drive - Reverse 2 8.4 mile/h 13.4 km/h Less
Converter Drive - Reverse 3 14.3 mile/h 23.0 km/h Less
Direct Drive - Forward 1 4.5 mile/h 7.2 km/h Less
Direct Drive - Forward 2 7.9 mile/h 12.8 km/h Less
Direct Drive - Forward 3 14.0 mile/h 22.5 km/h Less
Direct Drive - Reverse 1 4.9 mile/h 7.9 km/h Less
Direct Drive - Reverse 2 8.8 mile/h 14.1 km/h Less
Direct Drive - Reverse 3 15.4 mile/h 24.8 km/h Less
Number of Forward Speeds 3 3 Less
Number of Reverse Speeds 3 3 Less

Hydraulic System

Output at 2,040 rpm and 6900 kPa (1,000 psi) 82.0 gal/min 311.0 l/min Less
Cylinder, Double Acting - Tilt and Tip, Bore and Stroke 209.5 mm × 188 mm (8.25 in × 7.5 in) 209.5 mm × 188 mm (8.25 in × 7.5 in) Less
Relief Valve Setting - Bulldozer (Large Pump) 2700.0 psi 18650.0 kPa Less
Relief Valve Setting - Tilt Cylinders (Small Pump) 2920.0 psi 20150.0 kPa Less

Steering

Relief Valve Setting 4500.0 psi 31000.0 kPa Less
Hydraulic Output at 2,128 rpm and 6900 kPa (1,000 psi) 108.0 gal/min 410.0 l/min Less
Minimum Turning Radius - Over Bucket 407.0 in 10337.0 mm Less
Minimum Turning Radius - Over Bucket - HL 424.0 in 10757.0 mm Less
Steering Angle - Each Direction 35.0 ° 35.0 ° Less

Service Refill Capacities

Fuel Tank - Standard 268.4 gal (US) 1016.0 l Less
Cooling System 39.6 gal (US) 150.0 l Less
Crankcase 25.0 gal (US) 95.0 l Less
Transmission 29.0 gal (US) 110.0 l Less
Hydraulic Tank 189.4 gal (US) 717.0 l Less
Differential - Final Drives - Front 71.6 gal (US) 271.0 l Less
Differential - Final Drives - Rear 68.9 gal (US) 261.0 l Less
Hydraulic System - Implement and Brakes - Tank Only 52.0 gal (US) 197.0 l Less
Hydraulic System - Steering and Engine Cooling Fan - Tank Only 34.9 gal (US) 132.0 l Less

Cab

Cab - ROPS/FOPS Meets SAE and ISO standards Meets SAE and ISO standards Less

Brakes

Brakes Meets SAE/ISO 3450 1996 Meets SAE/ISO 3450 1996 Less

Axles

Front Fixed Fixed Less
Rear Oscillating ±11° Oscillating ±11° Less
Maximum Single-Wheel Rise and Fall 22.5 in 572.0 mm Less

Operating Specifications

Operating Weight 156120.0 lb 70815.0 kg Less

Blades

Blade Capacities 16.1 m3-30.7 m3 (21.1 yd3-40.2 yd3) 16.1 m3-30.7 m3 (21.1 yd3-40.2 yd3) Less

Sound Performance Levels

Sound Performance Meets ANSI, SAE and ISO standards Meets ANSI, SAE and ISO standards Less

Productivity

Fuel Efficiency

Reliability

Operator Comfort

Serviceability

Sustainability

Safety

Technology Solutions

Customer Support

Blades