621H Wheel Tractor-Scraper

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

Engine

Max. Power: 407.0 hp
Tractor: CatÂ® C13 ACERTâ„¢

Tractor Engine

Flywheel Power: Tractor/Scraper: 304 kW (407 hp)

Scraper Bowl

Scraper Capacity: Heaped: 24.0 yd3
Rated Load: 57600.0 lb
Heaped Capacity: 24.0 yd3
Maximum Apron Closure Force: 50580.0 lb
Maximum Apron Opening: 69.6 in
Maximum Depth of Cut: 12.4 in
Maximum Depth of Spread: 21.3 in
Maximum Ground Clearance at Cutting Edge: 23.4 in
Maximum Hydraulic Penetration Force: 130390.0 lb
Struck Capacity: 17.1 yd3
Thickness of Cutting Edge: 0.9 in
Width of Cut, Outside Router Bits: 123.5 in

Transmission

Top Speed (Loaded): 33.5 mph
1 Forward: 3.1 mph
2 Forward: 5.5 mph
3 Forward: 7.5 mph
4 Forward: 10.1 mph
5 Forward: 13.6 mph
6 Forward: 18.4 mph
7 Forward: 24.8 mph
8 Forward: 33.5 mph
Reverse: 5.7 mph

Hydraulics

Cushion Hitch Circuit Flow: 10.6 gal/min
Cushion Hitch Cylinder Bore: 5.5 in
Cushion Hitch Cylinder Stroke: 9.9 in
Push/Pull Bail Cylinder Bore: 3.5 in
Push/Pull Bail Cylinder Stroke: 16.3 in
Scraper Circuit Flow: 66.0 gal/min
Secondary Steering Circuit Flow: 10.3 gal/min
Steering Circuit Flow: 61.8 gal/min
Steering Cylinder Bore: 5.0 in
Steering Cylinder Stroke: 44.4 in
Bowl Cylinder Bore: 5.5 in
Bowl Cylinder Stroke: 33.3 in
Apron Cylinder Bore: 5.9 in
Apron Cylinder Stroke: 22.2 in
Ejector Cylinder Bore: 5.5 in
Ejector Cylinder Stroke: 61.0 in

Steering

Steering Angle - Right: 85Âº
Steering Angle - Left: 82Âº

Service Refill Capacities - Tractor

Engine Crankcase: 8.75 gal
Windshield Washer Reservoir: 1.3 gal
Transmission: 18.5 gal
Differential: 45.8 gal
Final Drive (per side): 5.0 gal
Cooling System: 17.0 gal
Hydraulic Reservoir: 22.0 gal

Service Refill Capacities - Scraper

Fuel Tank: 201.6 gal
Non-Powered Wheel: 1.1 gal

Standards

Standards: Standards

Tractor Engine - U.S. EPA Tier 4 Interim/EU Stage IIIB

Bore: 5.1 in
Displacement: 763.0 in3
Max. Power (All Gears) (ISO 14396): 407.0 hp
Max. Power Reference Engine Speed: 1700.0 RPM
Stroke: 6.2 in
Tractor Engine: CatÂ® C13 ACERTâ„¢

Tractor Engine - Prior U.S. EPA Tier 3/EU Stage IIIA configuration*

Bore: 5.1 in
Displacement: 763.0 in3
Max. Power (All Gears) (ISO 14396): 407.0 hp
Max. Power Reference Engine Speed: 1700.0 RPM
Stroke: 6.2 in
Tractor Engine: CatÂ® C13 ACERTâ„¢

Weights - Machines meeting U.S. EPA Tier 4 Interim/EU Stage IIIB emission standards

Push-Pull - Loaded, based on a rated load: 141141.0 lb
Push-Pull - Operating Weight - full fuel tanks: 82541.0 lb
Push-Pull - Shipping Weight - 10% fuel: 81090.0 lb
Standard - Loaded, based on a rated load: 137374.0 lb
Standard - Operating Weight - full fuel tanks: 79774.0 lb
Standard - Shipping Weight - 10% fuel: 78279.0 lb

Weights - Machines achieving prior U.S. EPA Tier 3/EU Stage IIIA emission levels

Push-Pull - Loaded, based on a rated load: 135597.0 lb
Push-Pull - Operating Weight - full fuel tanks: 81996.0 lb
Push-Pull - Shipping Weight - 10% fuel: 80502.0 lb
Standard - Loaded, based on a rated load: 136830.0 lb
Standard - Operating Weight - full fuel tanks: 79230.0 lb
Standard - Shipping Weight - 10% fuel: 77735.0 lb