Caterpillar WHEEL DOZER 844K - catalog of spare parts
Cat wheel dozers are engineered with durability for maximum availability over several life cycles. Thanks to optimized performance and ease of maintenance, our machines allow you to move more materials efficiently and safely with less cost per ton. Designed to perform complex, high-volume 844K wheel dozers, Cat is the largest wheel dozer in the Cat range and is ideal for large mining companies, power generation companies, general contractors and wherever mobility, versatility and compaction are required.
Choose WHEEL DOZER 844K section:
RELIABLE STRUCTURES
Your bottom line is enhanced by very durable structures that achieve multiple life cycles and withstand the toughest loading conditions.
Rear frame full box section resists torsional shocks and twisting.
Castings in the end frame of the engine are used in high voltage areas to distribute high loads.
Attachment areas for cast axles distribute the load better to improve the integrity of the structure.
90 percent of the machine design is robotic welding to ensure high consistency of welds and increased strength.
FRAMES
Your key to maximum uptime and productivity is our front and rear frame.
Full box frames absorb twisting forces during dosing, maintaining alignment for hitch pins and drive lines.
The design of the coupling device has double tapered roller bearings and hardened pins that withstand both horizontal and vertical loads.
Increase strength at key points through the use of monolithic castings.
LOCATION Dozer hand beam and hand lever
To ensure long service life and reliability, solid one-piece pushing beams are wide in width and not just attached to the side of the frame. In an angular slumber, tensions are transmitted and absorbed through most of the frame.
INTEGRATED TRANSMISSION MANAGEMENT AND CONTROL SYSTEM (STIC ™)
Experience maximum responsiveness and control with STIC, which combines the choice of direction, gear selection and steering in one lever.
A simple side-to-side movement turns the machine right or left, minimizing operator movement.
Easy to manage finger gear selection.
Smoother, faster cycles and less operator fatigue through the use of built-in controls with minimal effort.
WHEEL PLANETARY TRANSMISSION
Creating your success starts with a best-in-class powertrain designed specifically for mining.
Sequential smooth switching and efficiency thanks to integrated electronic controls.
Long service life and reliability due to heat treatment of equipment and metallurgy.
Three speeds forward and three backwards to fit your application.
CAT C27 ACERT ENGINE
The durability and efficiency of your 844K is ensured by the Cat C27 ACERT engine. Optimum performance is achieved through the use of 12-cylinder direct injection.
Optimized performance and fast engine response with electronic control module.
Reliable performance with full control of injection time, duration and pressure with injection of an electronically controlled electronic unit (MEUI ™).
Longer engine life and improved fuel efficiency at lower rated speeds
Designed to meet US EPA Tier 4 Final or Tier 2 standards.
IMPELLER (ICTC) Clutch Torque Converter And RIMPULL (RCS) CONTROL SYSTEM
Reduce your cost per ton using advanced ICTC and RCS for modulated thrust.
Reduce slippage and tire wear by modulating the thrust from 100 to 25 percent while simultaneously depressing the left pedal. After reaching 25% of the traction effort, the left pedal engages the brake.
Reduce the likelihood of wheel slippage without reducing hydraulic efficiency with RCS.
Improved fuel efficiency in certain applications thanks to our lock-up clutch torque converter for direct drive.
ELECTRO-HYDRAULIC CONTROL
Operators increase productivity with our responsive guns feature.
Work comfortably through the electronically controlled stops of the hydraulic cylinder.
Handle easy-to-use soft locks.
EASY RESPONSE
Increase operator efficiency by matching blade speed with your application.
Three different speeds: standard, accurate and fast.
Easy to configure via advisor display.
Affects only the function of raising and lowering the blade.
STEERING SYSTEM
Sure loader operation begins with precise machine control, which is provided by the load-sensing 844K hydraulic steering system.
Increase efficiency with our variable displacement piston pumps.
Achieve precise positioning for easy loading in hard-to-reach places with a 35-degree turning force
Enhance operator comfort with integrated steering and transmission functions.
FILTRATION SYSTEM
Take advantage of the increased performance and reliability of your hydraulic system with our state-of-the-art filtration system.
Drain filter in the lift / tilt housing.
Raise / tilt high pressure screens.
Filter stock steering.
High pressure steering screens.
Hydraulic body filter drain.
Filter lubrication drive front pump.
Front and rear brake oil screens.
STATION OPERATOR
Your operators can work more efficiently and feel comfortable with our cab features that are tailored to customer requirements.
ENTRANCE AND EXIT
Easily and safely enter and exit the cab thanks to new ergonomic features.
Two side access points.
Fold STIC steering / armrest.
Reduced access angle to the stairs.
CAT COMFORT SERIES III SEAT
Increase comfort and reduce operator fatigue with the Cat Comfort Series III seat.
High backrest design and very thick contour pads.
Air suspension system.
Easily accessible seat levers and controls for adjustment in six directions.
Installed on the seat module of the unit and the steering mechanism STIC, which moves with the seat.
Retractable seat belt width 76 mm (3 inches).
COACH SEAT
Safe training for other operators in comfort with our standard training chair.
Retractable seat belt width 76 mm (3 inches).
Folding design with molded tray for drinks and storage.
WEDNESDAY
Your operator`s productivity is enhanced by our clean and comfortable cab.
Experience a reduction in vibration from the viscous cab supports and air suspension of the seat.
Maintain the desired cab temperature with automatic temperature control.
Sealed cabin with filtered air.
Sound level reduced to a quiet 69 dB (A).
Convenient floor tray / lunch box.
TECHNOLOGICAL SOLUTIONS
The 844K electronic systems were fully integrated to function as one machine. This integration creates a smart machine and a more informed operator, maximizing the performance of both.
VIMS ™ 3G
We make every effort to help our customers and operators work best with our Vital Information Management System (VIMS 3G).
Easy to view adviser The display has a large screen.
Intuitive controls and easy navigation with our advanced user interface.
Reduce maintenance time by informing operators of the malfunction or operation of the machine system.
OPERATOR PROFILE
Operator comfort begins with individual settings for machine functions. Through our advisory display, the operator can instantly recall personalized profiles.
Store up to 10 separate operator profiles via advisor.
Reduce setup time between operators by invoking custom screen layouts.
CAT MINESTAR SYSTEM
The Cat MineStar System is the industry`s largest set of integrated mine management and mobile equipment technologies that can be customized to suit your work needs. Its feature sets — Fleet, Terrain, Detect, Health, and Command — contain a range of technologies that allow you to manage everything from fleet assignment and status monitoring to remote and autonomous control. The 844K can use many of these advanced technologies, some of which are standard in the factory.
FLEET
Fleet provides comprehensive machine tracking, assignment and performance management in real time, giving you a complete overview of all operations from anywhere in the world.
TRAINERS FOR LOADING
The landscape with your 844K allows you to accurately manage loading operations with navigation technology. This increases 844K performance and provides real-time feedback for increased efficiency.
DETECTION
Detection helps to increase operator awareness, increasing safety at your work. It includes a number of features designed to assist the operator in areas with limited visibility around fixed and mobile equipment.
HEALTH
Health provides critical vehicle status and operational data for your entire fleet. It includes comprehensive capabilities for monitoring the status of equipment and assets with a wide range of diagnostic, analytical and reporting tools.
SECURITY
We are constantly improving our products to provide a safe working environment for the operator and those who work in your workplace.
ACCESS MACHINE
Wider stairs with reduced tilt angles increase operator safety when entering and exiting the 844K.
Aisles with non-skid surfaces and built-in blocking / marking points are designed for service areas.
Windshield cleaning platforms provide safe and convenient access for the operator.
Continually maintain three points of contact across service areas at ground level or platform.
Emergency exit.
TRANSPARENCY
Optional folding curtains and heated mirrors provide improved visibility for safe operation.
The Cat Detection feature with object detection system (rear view camera and radar) or the Vision option (rear view camera) increases operator awareness around the machine.
Standard HID lamps provide excellent visibility of the work area.
The cab has LED signal beacons.
OPERATOR ENVIRONMENT
Low vibrations for the operator due to the viscous cab supports and air suspension of the seat.
Low noise level in the cabin.
An operator training point facilitates safe training for a new operator.
Standard 76 mm (3 in.) Seat belts on the operator’s seat and on the seat for operator training.
POWER ACCESS SYSTEM
The Cat-powered access system provides easier access to the main staircase, improving entry and exit to the rear platform and back.
Safe, ergonomic access system.
All operators have enough space when using the wide ladder.
Operators maintain three-point contact with full handrails on each side.
Raise the lower platform from the level of the cabin or from the ground.
Occupants can quickly fail with a conveniently located emergency drain valve if the loader fails.
WE CAN HELP YOU TO ENSURE YOU 844K HAS THE FEATURES OF THE DESIGN TO REDUCE YOUR TIME.
Extended service intervals for fluids and filters.
Safe and convenient service with terrestrial or platform access and grouped service points.
Swing doors on both sides of the engine compartment provide easy access to important daily maintenance checks.
Ecology drains for ease of maintenance and to prevent spills of potential environmental pollutants.
Centralized cranes with remote control.
Reduce downtime with VIMS system notifications so your operators and technicians can solve any problems before a crash.
SUPPORTING LEGENDARY CAT
Dear partner, your Cat dealer is always at your service.
Preventive maintenance programs and guaranteed service contracts.
Best-in-class parts availability.
Incease your effectiveness with operator training.
Original repaired Cat parts.
SUSTAINABLE PROFIT
Environmental friendliness is designed and built into our 844K features.
Turning the engine off at idle can help you save fuel by avoiding unnecessary idling.
With our maintenance-free batteries, reduce waste for the environment.
844K is created for several lives. To help extend the life of the machine, Caterpillar offers a range of sustainable options, such as our Reman and Certified Rebuild programs. In these programs, reusable or remanufactured components can provide cost savings of 40 to 70 percent, which reduces operating costs.
Caterpillar offers retrofit packages that allow you to use new features on older machines and maximize your resources. And when you complete the Cat Certified Rebuild program, these upgrade kits are part of the recovery process.
DEPENDABLE BLADES
Maximize your productivity with a suitable blade for your dispenser.
High strength, extruded rib design.
Cat large tracked tractor on cutting edges and lower wear plates.
Optimized width and capacity for superior metering and rolling characteristics.
COAL BLADE
Increase your performance with the Cat Cat Blade, designed to maintain load control, and high capacity for lighter materials.
SEMI-U BLADE
Shows the characteristics of the S and U blades in the same housing for increased productivity, while maintaining the excellent distribution characteristics of the straight blade.
HEAVY SEX
For unsurpassed durability in high wear applications, Semi-U blade:
Hardox 400 Liner and side panels
Additional reinforcement at the bottom of the blade
ENGINE
Engine Model |
Cat® C27 ACERT™ |
Gross Power |
752.0 HP |
Bore |
5.4 in |
Stroke |
6.0 in |
Displacement |
1649.5 in³ |
Torque Rise |
18.0 % |
Net Power - SAE J1349 - Standard Ambient |
699.0 HP |
Net Power - SAE J1349 |
699.0 HP |
Gross Power - ISO 14396 |
752.0 HP |
Net Power - SAE J1349 - High Ambient |
648.0 HP |
Peak Torque - Speed |
2624.0 lb/ft |
Emissions |
U.S. EPA Tier 4 Final or Tier 2 Equivalent |
Rated Speed |
1800.0 r/min |
Gross Power - SAE J1995 |
766.0 HP |
WEIGHTS
Operating Weight |
165089.0 lb |
TRANSMISSION
Converter Drive - Forward 1 |
4.5 mile/h |
Converter Drive - Forward 2 |
8.3 mile/h |
Converter Drive - Forward 3 |
14.2 mile/h |
Converter Drive - Reverse 1 |
4.9 mile/h |
Converter Drive - Reverse 2 |
9.1 mile/h |
Converter Drive - Reverse 3 |
15.5 mile/h |
Direct Drive - Forward 2 |
8.5 mile/h |
Direct Drive - Forward 3 |
15.2 mile/h |
Direct Drive - Reverse 1 |
5.4 mile/h |
Direct Drive - Reverse 2 |
9.6 mile/h |
Direct Drive - Reverse 3 |
16.4 mile/h |
Transmission Type |
Cat Planetary Power Shift |
Direct Drive - Forward 1 |
Lock-up disabled |
SERVICE REFILL CAPACITIES
Fuel Tank - Standard |
286.6 gal (US) |
Cooling System |
54.9 gal (US) |
Crankcase |
20.0 gal (US) |
Transmission |
29.1 gal (US) |
Differential - Final Drives - Front |
71.6 gal (US) |
Differential - Final Drives - Rear |
68.9 gal (US) |
Hydraulic System - Implement and Hydraulic Fan |
68.9 gal (US) |
Hydraulic System - Steering and Braking |
34.9 gal (US) |
CAB
Cab - ROPS/FOPS (1) |
Cat cab with separate ROPS/FOPS is standard in North America, Europe and Japan. |
Air Conditioning |
Standard air conditioning system contains environmentally friendly R134a refrigerant |
ROPS |
ROPS meets SAE J11040 APR88, ISO 3471:2008 and ISO 3471:1994 criteria. |
Cab - ROPS/FOPS (2) |
SAE J11040 APR88, ISO 3471:2008, ISO 3471:1994 |
FOPS |
FOPS meets SAE J231 JAN81 and ISO 3449:1992 Level II criteria. |
BRAKES
Brakes |
Meets ISO 3540:2011 |
AXLES
Front |
Fixed |
Rear |
Trunnion |
Oscillation Angle |
8.5 ° |
BLADE
Blade Capacity Range |
15.9-30.7 m3 (20.7-40.2 yd3) |
SOUND PERFORMANCE - STANDARD
Machine Sound Level (ISO 6395:2008) |
115.0 dB(A) |
Operator Sound Level (ISO 6396:2008) |
69.0 dB(A) |
SOUND PERFORMANCE - SUPPRESSION
Machine Sound Level (ISO 6395:2008) |
113.0 dB(A) |
Operator Sound Level (ISO 6396:2008) |
69.0 dB(A) |
HYDRAULIC SYSTEM - LIFT/TILT
Relief Valve Setting - Tilt Cylinders (Small Pump) |
2920.0 psi |
Output at 2,000 rpm and 6900 kPa (1,000 psi) |
82.0 gal/min |
Cylinders, Double Acting - Lift, Bore and Stroke |
133 mm × 1535 mm (5.25 in × 60.4 in) |
Relief Valve Setting - Bulldozer (Large Pump) |
2700.0 psi |
Cylinder, Double Acting - Tilt and Tip, Bore and Stroke |
210 mm × 188 mm (8.25 in × 7.4 in) |
HYDRAULIC SYSTEM - STEERING
Total Steering Angle |
35.0 ° |
Steering System - Circuit |
Pilot, load sensing |
Minimum Turning Radius - Over Blade |
34.0 ft |
Relief Valve Setting |
4500.0 psi |
Steering System - Pump |
Piston, variable displacement |
Maximum Flow |
94.3 gal/min |
DIMENSIONS (APPROXIMATE)
Height - Top of Exhaust Pipe |
16.6 ft |
Wheel Base |
15.1 ft |
Length - With Blade on Ground |
36.5 ft |
Centerline of Rear Axle to Edge of Bumper |
12.5 ft |
Centerline of Front Axle to Hitch |
7.5 ft |
Height - Top of ROPS |
17.2 ft |
Ground Clearance |
2.0 ft |
Height - Top of Hood |
12.7 ft |
Dimensions
Dimensions (Approximate)
Ground Clearance 2ft in
Specifications
Engine
Gross Power 752hp
Rated Speed 1800rpm
Torque Rise 18%
Displacement 1649.5cu in
Bore 5.4in
Stroke 6in
Emissions U.S. EPA Tier 4 Final or Tier 2 Equivalent
Net Power - SAE J1349 699hp
Gross Power - SAE J1995 766hp
Engine Model Cat C27 ACERT
Peak Torque - Speed 2624rpm
Gross Power - ISO 14396 752hp
Net Power - SAE J1349 - Standard Ambient 699hp
Net Power - SAE J1349 - High Ambient 648hp
Transmission
Transmission Type Cat Planetary Power Shift
Direct Drive - Forward 3 15.2mph
Direct Drive - Reverse 3 16.4mph
Direct Drive - Forward 2 8.5mph
Direct Drive - Reverse 2 9.6mph
Converter Drive - Forward 3 14.2mp
Converter Drive - Reverse 3 15.5mph
Direct Drive - Forward 1 Lock-up disabled
Converter Drive - Forward 1 4.5mph
Converter Drive - Forward 2 8.3mph
Direct Drive - Reverse 1 5.4mph
Converter Drive - Reverse 1 4.9mph
Converter Drive - Reverse 2 9.1mph
Blade
Blade Capacity Range 15.9-30.7 m3 (20.7-40.2 yd3)
Axles
Front Fixed
Rear Trunnion
Oscillation Angle 8.5 degrees
Brakes
Brakes Meets ISO 3540:2011
Service Refill Capacities
Cooling System 54.9gal
Crankcase 20gal
Fuel Tank - Standard 286.6gal
Transmission 29.1gal
Differential - Final Drives - Front 71.6gal
Differential - Final Drives - Rear 68.9gal
Hydraulic System - Implement and Hydraulic Fan 68.9gal
Hydraulic System - Steering and Braking 34.9gal
Dimensions (Approximate)
Height - Top of ROPS 17.2ft in
Ground Clearance 2ft in
Wheel Base 15.1ft in
Height - Top of Exhaust Pipe 16.6ft in
Length - With Blade on Ground 36.5ft in
Height - Top of Hood 12.7ft in
Centerline of Rear Axle to Edge of Bumper 12.5ft in
Centerline of Front Axle to Hitch 7.5ft in
Hydraulic System - Lift/Tilt
Cylinders, Double Acting - Lift, Bore and Stroke 133 mm 1535 mm (5.25 in 60.4 in)
Cylinder, Double Acting - Tilt and Tip, Bore and Stroke 210 mm 188 mm (8.25 in 7.4 in)
Output at 2,000 rpm and 6900 kPa (1,000 psi) 82 gal/min
Relief Valve Setting - Bulldozer (Large Pump) 2700 psi
Relief Valve Setting - Tilt Cylinders (Small Pump) 2920 psi
Hydraulic System - Steering
Steering System - Circuit Pilot, load sensing
Steering System - Pump Piston, variable displacement
Total Steering Angle 35degrees
Maximum Flow 94.3 gal/min
Minimum Turning Radius - Over Blade 34ft in
Relief Valve Setting 4500 psi
Cab
Air Conditioning
Standard air conditioning system contains environmentally friendly R134a refrigerant
ROPS
ROPS meets SAE J11040 APR88, ISO 3471:2008 and ISO 3471:1994 criteria.
FOPS
FOPS meets SAE J231 JAN81 and ISO 3449:1992 Level II criteria.
Cab - ROPS/FOPS (2)
SAE J11040 APR88, ISO 3471:2008, ISO 3471:1994
Cab - ROPS/FOPS (1)
Cat cab with separate ROPS/FOPS is standard in North America, Europe and Japan.
Sound Performance - Standard
Machine Sound Level (ISO 6395:2008) 115 dB(A)
Operator Sound Level (ISO 6396:2008) 69 dB(A)
Sound Performance - Suppression
Operator Sound Level (ISO 6396:2008) 69 dB(A)
Machine Sound Level (ISO 6395:2008) 113 dB(A)