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Open Bowl 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.

621G Scrapers

Quick loading, high travel speeds and the ability to load and dump on the run yield fast cycle times, allowing Caterpillar Wheel Tractor-Scrapers to consistently deliver high productivity at the lowest cost per ton.

  • Specification Summary

  • Flywheel Power: Tractor/Scraper246 kW (330 hp)
  • Scraper Capacity: Heaped17 m3
  • Top Speed (Loaded)51.5 km/h
  • Tractor EngineC15 ACERT
  • Rated Load23950 kg

Product Details

Tractor Engine

Flywheel Power: Tractor/Scraper 246 kW (330 hp)
Gross Power - Gears 1-2 268 kW
Gross Power - Gears 3-8 294 kW
Net Power - Gears 1-2 246 kW
Net Power - Gears 3-8 272 kW
Caterpillar Net Power 246 kW
ISO 9249 246 kW
EEC 80/1269 246 kW
SAE J1349 243 kW
Bore 140 mm
Stroke 165 mm
Displacement 15.2 L

Scraper Bowl

Scraper Capacity: Heaped 17 m3
Rated Load 23950 kg
Capacity Struck 12 m3
Depth of Cut - max. 333 mm
Width of Cut, to Router Bits 3023 mm
Ground Clearance - max. 522 mm
Cutting Edge - thickness 22 mm
Hyd. Penetration Force - 621G 150.4 kN
Depth of Spread - max. 522 mm
Apron Opening 1780 mm
Apron Closure Force 107 kN


Top Speed (Loaded) 51.5 km/h
1 Forward 5 km/h
2 Forward 7.6 km/h
3 Forward 10.9 km/h
4 Forward 14.8 km/h
5 Forward 19.9 km/h
6 Forward 26.9 km/h
7 Forward 36.4 km/h
8 Forward 51.5 km/h
Reverse 9.2 km/h


Tractor Engine C15 ACERT


Operating Weight 56513 kg

Weights - Standard, tandem

Total Shipping 32865 kg
Tractor Shipping 22677 kg
Scraper Shipping 10118 kg
Total Operating - empty 33470 kg
Front Axle 22760 kg
Rear Axle 10710 kg
Total Operating - loaded 57420 kg
Front Axle Weight - loaded 30433 kg
Rear Axle Weight - loaded 26987 kg


Width – Overall Machine 3467 mm
Width – Tractor 3130 mm
Width - rear tire center lines 2180 mm
Width – Inside of Bowl 2946 mm
Width – Outside Rear Tires 3048 mm
Height – Overall Shipping 3705 mm
Height – Top of Cab 3423 mm
Ground Clearance – Tractor 553 mm
Front of Tractor to Front Axle 3058 mm
Rim radius 432 mm
Axle to Vertical Hitch Pin 432 mm
Height – Scraper Blade Maximum 522 mm
Wheelbase 7722 mm
Length - overall machine 12917 mm
Rear Axle to Rear of Machine 2142 mm
Bail Length - max. (push-pull) 1612 mm
Extended Push Block (push-pull) 2786 mm

Service Refill Capacities – Tractor

Crankcase 36 L
Transmission 72 L
Differential 144 L
Final Drive (per side) 19 L
Cooling System 107 L
Hydraulic Reservoir 140 L
Wheel Coolant (each) 45 L
Windshield Washer 6 L


Width - 180° Turn 10.9 m
Steering Angle – Right 90°
Steering Angle – Left 85°
Hydraulic Output 209 L/min


Bowl Cylinder Bore 152 mm
Bowl Cylinder Stroke 813 mm
Apron Cylinder Bore 184 mm
Apron Cylinder Stroke 597 mm
Ejector Cylinder Bore 165 mm
Ejector Cylinder Stroke 1549 mm
Steering Circuit 209 L/min
Scraper Circuit 284 L/min
Cushion Hitch Circuit 37 L/min
Secondary Steering Circuit 150 L/min
Relief Valve - Steering Circuit 15500 kPa
Relief Valve - Implement Circuit 15000 kPa
Compensator Setting - Cushion Hitch Circuit 16000 kPa

Power Train – Engine

Electronically controlled Caterpillar® engines with ACERT technology, modular radiator with 9 fins per inch, and an Electronic Control Module maximizes power to the cutting edge and exceptional haul road speed.

Power Train – Transmission

Planetary powershift transmission delivers excellent load capability. Redesigned front and rear axles accommodate wider brake shoes and drums. The neutral coast inhibitor and programmable top gear reduce wear while increasing machine performance.

Electronic Controls

Electronic controls improve machine response and provide advanced diagnostic capabilities that result in better machine availability. The Product Link option allows remote monitoring of location, machine system status, and alert indicators.

Operator Station

Convenient control placement and a comfortable work environment are keys to high productivity. Features include Single Lever Implement Control, an air seat suspension and improved instrumentation.


Superior structural design delivers state-of-the-art ride, capacity, and material control while assuring the durability and reliability customers expect from Caterpillar.

Scraper Bowl

Caterpillar Scraper bowls deliver large loads with better retention, excellent material flow, fast cycle times and high productivity. Relocating the implement valve to the draft tube improves access and serviceability.

Auger Arrangement

Provides self-loading capability with the same wide material appetite as an open bowl machine.


The latest electronic monitoring systems, grouped service points, and rugged Caterpillar components simplify maintenance and minimize downtime. New two-piece access doors open easily and stay open for better access.

Customer Support

The best parts availability and the best service capability will help keep your equipment working.
Catepillar Equipments


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