621H Wheel Tractor-Scraper

621H Open Bowl Scrapers

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.

Product Specs

Scraper Bowl

Maximum Apron Closure Force
50580lb
Maximum Apron Opening
69.6in
Scraper Capacity - Heaped
24yd³
Rated Load
57600lb
Heaped Capacity
24yd³
Maximum Depth of Cut
12.4in
Maximum Depth of Spread
21.3in
Maximum Ground Clearance at Cutting Edge
23.4in
Maximum Hydraulic Penetration Force
130390lb
Struck Capacity
17.1yd³
Thickness - Cutting Edge
0.9in
Width - Cut - Outside Router Bits
123.5in

Weights - Machines Meeting U.S. EPA Tier 4 Interim/EU Stage IIIB Emission Standards

Push-Pull - Loaded - Based on a Rated Load
141141lb
Push-Pull - Operating Weight - Full Fuel Tanks
82541lb
Push-Pull - Shipping Weight - 10% Fuel
81090lb
Standard - Loaded, Based on a Rated Load
137374lb
Standard - Operating Weight - Full Fuel Tanks
79774lb
Standard - Shipping Weight - 10% fuel
78279lb

Weights - Machines Achieving Prior U.S. EPA Tier 3/EU Stage IIIA Emission Levels

Push-Pull - Loaded - Based on a Rated Load
135597lb
Push-Pull - Operating Weight - Full Fuel Tanks
81996lb
Push-Pull - Shipping Weight - 10% Fuel
80502lb
Standard - Loaded, Based on a Rated Load
136830lb
Standard - Operating Weight - Full Fuel Tanks
79230lb
Standard - Shipping Weight - 10% fuel
77735lb

Hydraulics

Push/Pull Bail Cylinder Bore
3.5in
Push/Pull Bail Cylinder Stroke
16.3in
Cushion Hitch Circuit Flow
10.6gal/min
Cushion Hitch Cylinder Bore
5.5in
Cushion Hitch Cylinder Stroke
9.9in
Scraper Circuit Flow
66gal/min
Secondary Steering Circuit Flow
10.3gal/min
Steering Circuit Flow
61.8gal/min
Steering Cylinder - Bore
5in
Steering Cylinder - Stroke
44.4in
Bowl Cylinder Bore
5.5in
Bowl Cylinder Stroke
33.3in
Apron Cylinder Bore
5.9in
Apron Cylinder Stroke
22.2in
Ejector Cylinder Bore
5.5in
Ejector Cylinder Stroke
61in

Engine

Maximum Power
407HP
Tractor
Cat® C13 ACERT™

Tractor Engine

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

Transmission

Top Speed - Loaded
33.5mile/h
1 Forward
3.1mile/h
2 Forward
5.5mile/h
3 Forward
7.5mile/h
4 Forward
10.1mile/h
5 Forward
13.6mile/h
6 Forward
18.4mile/h
7 Forward
24.8mile/h
8 Forward
33.5mile/h
Reverse
5.7mile/h

Steering

Steering Angle - Right
85º
Steering Angle - Left
82º

Service Refill Capacities - Tractor

Engine Crankcase
8.75gal (US)
Windshield Washer Reservoir
1.3gal (US)
Transmission
18.5gal (US)
Differential
45.8gal (US)
Final Drive - Each
5gal (US)
Cooling System
17gal (US)
Hydraulic Reservoir
22gal (US)

Service Refill Capacities - Scraper

Fuel Tank
201.6gal (US)
Non-Powered Wheel
1.1gal (US)

Standards

Standards
Standards

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

Bore
5.1in
Displacement
763in³
Maximum Power - All Gears - ISO 14396
407HP
Maximum Power Reference Engine Speed
1700r/min
Stroke
6.2in
Tractor Engine
Cat® C13 ACERT™

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

Bore
5.1in
Displacement
763in³
Maximum Power - All Gears - ISO 14396
407HP
Maximum Power Reference Engine Speed
1700r/min
Stroke
6.2in
Tractor Engine
Cat® C13 ACERT™

Equipment

  • Power Train - Tractor
    • C13 ACERT engine with MEUI
    • Cat Engine Brake
    • Electric start, 24 Volt
    • Air cleaner, dry type with precleaner
    • Fan, hydraulic
    • Diesel Particulate Filter (DPF) aftertreatment (for engine meeting U.S. EPA Tier 4 Interim/EU Stage IIIB emission standards)
    • Ground level engine shutdown
    • Radiator, aluminum unit core
    • Guard, crankcase
    • Muffler (for engines achieving U.S. EPA Tier 3/EU Stage IIIA emission levels)
    • Starting aid, ether
    • Braking system: Primary and Secondary, wet disc, hydraulic Parking, hydraulically-released, spring-applied
    • Throttle Lock
    • Transmission: 8-speed planetary powershift ECPC Control APECS software Programmable top gear selection Transmission hold Differential lock Guard, power train
  • Power Train - Scraper
    • Braking system: Primary and Secondary, wet disc, hydraulic Parking, hydraulically-released, spring-applied
    • 4-speed (torque converter drive) transmission, planetary powershift
  • Electrical - Tractor
    • Alternator, 150 Amp
    • Batteries (4), 12 Volt, 1,000 CCA, maintenance free, high output
    • Electrical system, 24V
    • Lighting system: Headlights, halogen Turn signals with hazard function LED Floodlights, halogen (2), cutting edge (1), bowl (2), side vision (2)
    • Starting/charging receptacle
  • Electrical - Scraper
    • Alarm, backup
    • Lighting system: Brake lights, LED Turn signals with hazard function, LED
  • Operator Environment - Tractor
    • HVAC system, heat, AC, defrost
    • Thermostat control of HVAC system
    • Coat hook
    • Lunchbox platform with holding strap
    • Diagnostic connection (2)
    • 12V power ports (2)
    • Differential lock (1)
    • Dome courtesy light
    • Horn, electric
    • T-Handle implement control
    • Mirror, rearview
    • Radio ready, 12V
    • ROPS/FOPS cab, pressurized
    • Keypad switches
    • Safety tab rocker switches
    • Parking brake
    • Seat belt, static two-piece
    • Seat, air suspension, Comfort Series 3, rotates 30 degrees
    • Steering wheel, tilt, telescoping, padded
    • Storage in dash if WAVS or Cat Grade Control is not equipped
    • Windows, right side emergency egress
    • Windows, sliding
    • Windows, laminated, zipped in
    • Windshield wipers, front and rear windows, includes washers
    • Door lock
    • Messenger Display - gauges, warnings include: Coolant temp Engine oil temp Hydraulic oil temp DPF temp Fuel level Park brake Implement lockout Brake system Regeneration required Throttle lock System voltage Secondary steering Bail down Differential lock Apron float Transmission hold Cushion hitch High beam lights Action lamp Engine speed, rpm Gear selection out DPF fill levels
  • Fluids
    • Extended Life Coolant to -37° C (-34° F)
  • Other Standard Equipment - Tractor
    • Cushion hitch
    • Accumulators (cushion hitch) with Canadian Registration Number (CRN)
    • Fast oil change
    • Fenders, non metallic
    • Heater, engine coolant 120V
    • Tow pin, front
    • Vandalism locks
  • Other Standard Equipment - Scraper
    • Quick drop bowl valve
    • Vandalism locks
    • Extended push block

Optional Equipment

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