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Elevating Scrapers(Non Current)

Cat Wheel Tractor-Scrapers have the power, traction, and speed for reliable output in a variety of applications. Scraper options include single- and tandem-engine open bowls, tandem engine push-pulls, elevators, and auger arrangements.

623F Elevating Scraper

The 623F Elevating Scraper is a versatile, fast machine with a two-speed elevator drive and high hydraulic horsepower for maximum hauling and loading performance.

  • Specification Summary

  • Tractor Engine3406C
  • Net Power - Gears 1 - 2272 kW
  • Gross Power - Gears 1 - 2286 kW
  • Bore137 mm
  • Stroke165 mm

Product Details


Tractor Engine 3406C
Net Power - Gears 1 - 2 272 kW
Gross Power - Gears 1 - 2 286 kW
Bore 137 mm
Stroke 165 mm
Displacement 14.6 L
Caterpillar Net Power 272 kW
ISO 9249 272 kW
EEC 80/1269 272 kW
SAE J1349 369 kW
DIN 70020 378 PS
Net Power 272 kW

Scraper Bowl

Scraper Capacity: Heaped 1706 m3
Rated Load 24948 kg
Capacity Struck 13.8 m3
Depth of Cut - max 330 mm
Width of Cut, to Router Bits 3505 mm
Ground Clearance - max 387 mm
Cutting Edge thickness 35 mm
Hydraulic Penetration Force 150 kN
Depth of Spread - max 380 mm


1 Forward 5 km/h
2 Forward 9 km/h
3 Forward 11.4 km/h
4 Forward 15.4 km/h
5 Forward 20.8 km/h
6 Forward 28.2 km/h
7 Forward 38 km/h
8 Forward 51.3 km/h
Reverse 8.9 km/h


Total Operating - empty 36886 kg
Front Axle 23630 kg
Rear Axle 13256 kg
Total Shipping 36425 kg
Tractor Shipping 23631 kg
Scraper Shipping 13257 kg
Total Operating - loaded 62990 kg
Front Axle Weight - loaded 31773 kg
Rear Axle Weight - loaded 31217 kg


Length - overall 3730 mm
Width of Flight Face 217 mm
Length of Flights 2260 mm
Spacing of Flights 510 mm
Number of Flights 15


Height – Overall Shipping 3556 mm
Length – Overall Machine 13284 mm
Width – Overall Machine 3556 mm
Height – Top of Cab 3378 mm
Height – Scraper Blade Maximum 406 mm
Width – Tractor 2972 mm
Width – Inside of Bowl 2946 mm
Width - rear tire center lines 2210 mm
Width – Outside Rear Tires 3048 mm
Rim radius 432 mm
Front of Tractor to Front Axle 432 mm
Wheelbase 7976 mm
Rear Axle to Rear of Machine 2184 mm


Width - 180° Turn 10.9 m
Steering Angle – Right 90 Degrees
Steering Angle – Left 85 Degrees
Hydraulic Output 197 L/min
Ground-Driven Secondary Steering System 150 L/min

Service Refill Capacities

Fuel Tank 606 L
Crankcase 36 L
Transmission 72 L
Differential 163 L
Final Drive (each side) 19 L
Wheel Coolant (each) 45 L
Cooling System 83 L
Hydraulic Reservoir 140 L


Bowl Cylinder Bore 152 mm
Bowl Cylinder Stroke 508 mm
Floor Cylinder Bore 152 mm
Floor Cylinder Stroke 1353 mm
Ejector Cylinder Bore 127 mm
Ejector Cylinder Stroke 1213 mm
Steering Circuit 213 L/min
Scraper Circuit 240 L/min
Cushion Hitch Circuit 32.5 L/min
Supplemental Steering Circuit 140 L/min
Relief Valve - Steering Circuit 15500 kPa
Relief Valve - Implement Circuit 17237 kPa
Compensator Settings - Cushion Hitch Circuit 859 kPa
Compensator Settings - Elevator Circuit 36199 kPa


The six-cylinder, turbocharged engine is built for power, reliability and economy.

Proven Cat Engines

Proven Cat engines feature high torque rise for excellent lugging in tough loading applications and are designed to work long hours in the most demanding job conditions.

Displacement-to-Horsepower Ratio

High displacement-to-horsepower ratio reduces stress for long engine life.

Fuel System

Direct injection fuel system is adjustment-free, with individual injection pumps and valves.


Automatic, variable-injection timing delivers fuel as needed for maximum fuel efficiency when engine rpm varies between cut or fill work and high speed hauling.

Fuel/Air Ratio Control

Fuel/air ratio control is tamper resistant. Break-off blots and seal wires protect the control from adjustments that will not meet emissions regulations.


Turbocharger air flow is matched with the horsepower rating for improved performance and lower emissions.

Exhaust Ports

Exhaust ports have stainless sleeves to reduce heat rejection, resulting in less heat transfer to the jacket water system.

Cooling Jets

Dual-tube cooling jets in the block provide more oil to the bottom of the piston for better cooling.

Front Engine Support Group

Front engine support group is isolation-mounted to reduce vibration transfer.

Ground-Level Engine Shutoff Switch

Ground-level engine shutoff switch provides convenience and emergency access.


Laminated Thermo-Shield improves tractor protection by reducing the temperature of exposed engine surfaces, cools engine and operating compartments, improves hose and wiring life.


Smooth, automatic shifts for top production

Eight-Speed Power Shift Transmission

Eight-speed power shift transmission provides automatic, on-the-go shifting for simple, reliable operation. It also eliminates torque converter drive at haul road speeds above 5 mph (8km/h).

Neutral Coast Inhibitor Control

Neutral coast inhibitor control utilizes a ground speed sensor which automatically downshifts the machine to the current ground speed until torque converter drive speed is reached.

Top Gear Control

Top gear control helps prevent shifting above a programmed gear to better regulate haul road speeds.

Directional Shift Management

Directional shift management reduces drivetrain stress during an aggressive directional shift.

Electronic Programmable Transmission Control (EPTC II)

The Electronic Programmable Transmission Control (EPTC II) records both current and intermittent faults.

Cushion Hitch

Smoother ride improves productivity.


Caterpillar cushion hitch design dampens shocks to provide a smoother ride. The result is higher speed capability, less machine wear and increased productivity.

Elevator Mechanism

Work-alone capability reduces the operating cost-per-ton.

Variable Speed Elevator

Infinitely variable speed elevator, in both forward and reverse, allows the operator to match elevator speed to material.

Ejector Bowl and Sides

Ejector bowl and sides have been raised, improving the load profile by providing better carrying capacity and material retention.

Operator's Station

Comfort and control increase operator efficiency.


Sound suppressed, rubber-mounted ROPS cab reduces sound and vibration for comfortable, shift-long operation.

Electronic Monitoring System

The electronic monitoring system checks important machine systems and provides a three-level alert system.

Hydraulic Servo-Steering System

Hydraulic servo-steering system provides low-effort, automotive feel and excellent maneuverability.

Telescopic Steering System

The telescopic steering system is height adjustable and tilts at knee level for enhanced operator comfort and easy entry and exit.

Implement Controls

Pilot-operated implement controls can reduce operator fatigue by requiring a very low effort to actuate a machine function.


Air suspension seat is multi-adjustable.

Radio Ready Arrangement

Radio ready arrangement includes speakers, a 5-amp converter and two radio openings. A 15/25-amp converter is available from Custom Products.


Simplified service means more productive uptime.

Service Features

There are many convenient service features that keep these machines on the job.

O-ring Face Seals

O-ring face seals help make these machines "dry".

Hydraulic Chain Adjuster

New hydraulic chain adjuster is easily adjusted using a grease gun, reducing service time and improving overall chain life.

Centralized Lubrication Blocks

Centralized lubrication blocks for the hitch and steering reduce lube time.

Service Points

Service points for the engine are grouped on the righthand side for easy access.

Platforms and Handholds

Service platforms and numerous handholds for easy access and safety.

Folded Core Radiator

Folded core radiator allows individual cores to be replaced as a module which reduces service time and expense.

Sealed Floor Rollers

Sealed floor rollers eliminate lubrication.

Customer Support

Unmatched in the industry.

Parts Availability

Most Cat parts are immediately available from any dealer. Cat dealers rely on our worldwide computer network to find parts instantly and minimize machine downtime.

Machine Management Services

Cat dealers help manage your equipment investment with effective preventive maintenance programs.

Flexible Financing

Your dealer can arrange affordable financing for the entire Caterpillar product line.


Cat is committed to provide the most dependable machines on the market.


Optional retarder extends brake life when working on severe, downhill slopes.

Component Commonality

Increased component commonality with other Cat scrapers improves parts availability.


Rounded off bumpers reduce hooking into high walls.

Ground-Level Engine Shut-Offs

Ground-level engine shut-offs for operator convenience and emergency access.


Extensive use of castings in the frame, hitch and bowl provides long service life.

Wiring Harness and Hose Assemblies

Wiring harness and hose assemblies run down the draft arms to eliminate the need for "jump-over" lines which can reduce hydraulic system efficiency.


Standard tires provide the maximum flotation.

Scraper Driveline Guard

Scraper driveline guard protects the output case, differential and ejector cylinder which can minimize driveline maintenance costs.

Laminated Thermo-Shield

Laminated Thermo-Shield helps keep surface temperatures in the engine compartment below the flash point of diesel fuel.

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