621H Wheel Tractor-Scraper

US
Metric

Overview

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.

Tractor Engine

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

Scraper Bowl

Scraper Capacity: Heaped
24.00 yd3
18.30 m3
Rated Load
57600.00 lb
26127.00 kg
Heaped Capacity
24.00 yd3
18.30 m3
Maximum Apron Closure Force
50580.00 lb
225.00 kN
Maximum Apron Opening
69.60 in
1767.00 mm
Maximum Depth of Cut
12.40 in
315.00 mm
Maximum Depth of Spread
21.30 in
540.00 mm
Maximum Ground Clearance at Cutting Edge
23.40 in
594.00 mm
Maximum Hydraulic Penetration Force
130390.00 lb
580.00 kN
Struck Capacity
17.10 yd3
13.00 m3
Thickness of Cutting Edge
0.90 in
22.00 mm
Width of Cut, Outside Router Bits
123.50 in
3136.00 mm

Transmission

Top Speed (Loaded)
33.50 mph
53.90 km/h
1 Forward
3.10 mph
5.00 km/h
2 Forward
5.50 mph
8.90 km/h
3 Forward
7.50 mph
12.10 km/h
4 Forward
10.10 mph
16.30 km/h
5 Forward
13.60 mph
21.90 km/h
6 Forward
18.40 mph
29.60 km/h
7 Forward
24.80 mph
39.90 km/h
8 Forward
33.50 mph
53.90 km/h
Reverse
5.70 mph
9.20 km/h

Engine

Max. Power
407.00 hp
304.00 kW
Tractor
Cat® C13 ACERT™

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

Bore
5.10 in
130.00 mm
Displacement
763.00 in3
12.50 L
Max. Power (All Gears) (ISO 14396)
407.00 hp
304.00 kW
Max. Power Reference Engine Speed
1700.00 RPM
1700.00 RPM
Stroke
6.20 in
157.00 mm
Tractor Engine
Cat® C13 ACERT™

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

Bore
5.10 in
130.00 mm
Displacement
763.00 in3
12.50 L
Max. Power (All Gears) (ISO 14396)
407.00 hp
304.00 kW
Max. Power Reference Engine Speed
1700.00 RPM
1700.00 RPM
Stroke
6.20 in
157.00 mm
Tractor Engine
Cat® C13 ACERT™

Service Refill Capacities - Scraper

Fuel Tank
201.60 gal
763.00 L
Non-Powered Wheel
1.10 gal
4.00 L

Service Refill Capacities - Tractor

Engine Crankcase
8.75 gal
33.00 L
Windshield Washer Reservoir
1.30 gal
5.00 L
Transmission
18.50 gal
70.00 L
Differential
45.80 gal
173.00 L
Final Drive (per side)
5.00 gal
19.00 L
Cooling System
17.00 gal
64.00 L
Hydraulic Reservoir
22.00 gal
83.00 L

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

Push-Pull - Loaded - Based on a Rated Load
141141.00 lb
63567.00 kg
Push-Pull - Operating Weight - Full Fuel Tanks
82541.00 lb
37440.00 kg
Push-Pull - Shipping Weight - 10% Fuel
81090.00 lb
36782.00 kg
Standard - Loaded, Based on a Rated Load
137374.00 lb
62312.00 kg
Standard - Operating Weight - Full Fuel Tanks
79774.00 lb
36185.00 kg
Standard - Shipping Weight - 10% fuel
78279.00 lb
35507.00 kg

Standards

Standards
Standards

Steering

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

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

Push-Pull - Loaded - Based on a Rated Load
135597.00 lb
63320.00 kg
Push-Pull - Operating Weight - Full Fuel Tanks
81996.00 lb
37193.00 kg
Push-Pull - Shipping Weight - 10% Fuel
80502.00 lb
36515.00 kg
Standard - Loaded, Based on a Rated Load
136830.00 lb
62065.00 kg
Standard - Operating Weight - Full Fuel Tanks
79230.00 lb
35938.00 kg
Standard - Shipping Weight - 10% fuel
77735.00 lb
35260.00 kg

Hydraulics

Cushion Hitch Circuit Flow
10.60 gal/min
40.10 L/min
Cushion Hitch Cylinder Bore
5.50 in
140.00 mm
Cushion Hitch Cylinder Stroke
9.90 in
251.00 mm
Push/Pull Bail Cylinder Bore
3.50 in
90.00 mm
Push/Pull Bail Cylinder Stroke
16.30 in
415.00 mm
Scraper Circuit Flow
66.00 gal/min
250.00 L/min
Secondary Steering Circuit Flow
10.30 gal/min
39.00 L/min
Steering Circuit Flow
61.80 gal/min
234.00 L/min
Steering Cylinder Bore
5.00 in
127.00 mm
Steering Cylinder Stroke
44.40 in
1128.00 mm
Bowl Cylinder Bore
5.50 in
140.00 mm
Bowl Cylinder Stroke
33.30 in
845.00 mm
Apron Cylinder Bore
5.90 in
150.00 mm
Apron Cylinder Stroke
22.20 in
565.00 mm
Ejector Cylinder Bore
5.50 in
140.00 mm
Ejector Cylinder Stroke
61.00 in
1550.00 mm

Engine

Maximum Power
407.00 HP
304.00 kW
Tractor
Cat® C13 ACERT™

Tractor Engine

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

Scraper Bowl

Scraper Capacity - Heaped
24.00 yd³
18.30 m³
Rated Load
57600.00 lb
26127.00 kg
Heaped Capacity
24.00 yd³
18.30 m³
Maximum Depth of Cut
12.40 in
315.00 mm
Maximum Depth of Spread
21.30 in
540.00 mm
Maximum Ground Clearance at Cutting Edge
23.40 in
594.00 mm
Maximum Hydraulic Penetration Force
130390.00 lb
580.00 kN
Struck Capacity
17.10 yd³
13.00 m³
Thickness - Cutting Edge
0.90 in
22.00 mm
Width - Cut - Outside Router Bits
123.50 in
3136.00 mm

Transmission

Top Speed - Loaded
33.50 mile/h
53.90 km/h
1 Forward
3.10 mile/h
5.00 km/h
2 Forward
5.50 mile/h
8.90 km/h
3 Forward
7.50 mile/h
12.10 km/h
4 Forward
10.10 mile/h
16.30 km/h
5 Forward
13.60 mile/h
21.90 km/h
6 Forward
18.40 mile/h
29.60 km/h
7 Forward
24.80 mile/h
39.90 km/h
8 Forward
33.50 mile/h
53.90 km/h
Reverse
5.70 mile/h
9.20 km/h

Hydraulics

Cushion Hitch Circuit Flow
10.60 gal/min
40.10 l/min
Cushion Hitch Cylinder Bore
5.50 in
140.00 mm
Cushion Hitch Cylinder Stroke
9.90 in
251.00 mm
Scraper Circuit Flow
66.00 gal/min
250.00 l/min
Secondary Steering Circuit Flow
10.30 gal/min
39.00 l/min
Steering Circuit Flow
61.80 gal/min
234.00 l/min
Steering Cylinder - Bore
5.00 in
127.00 mm
Steering Cylinder - Stroke
44.40 in
1128.00 mm
Bowl Cylinder Bore
5.50 in
140.00 mm
Bowl Cylinder Stroke
33.30 in
845.00 mm
Apron Cylinder Bore
5.90 in
150.00 mm
Apron Cylinder Stroke
22.20 in
565.00 mm
Ejector Cylinder Bore
5.50 in
140.00 mm
Ejector Cylinder Stroke
61.00 in
1550.00 mm

Steering

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

Service Refill Capacities - Tractor

Engine Crankcase
8.75 gal (US)
33.00 l
Windshield Washer Reservoir
1.30 gal (US)
5.00 l
Transmission
18.50 gal (US)
70.00 l
Differential
45.80 gal (US)
173.00 l
Final Drive - Each
5.00 gal (US)
19.00 l
Cooling System
17.00 gal (US)
64.00 l
Hydraulic Reservoir
22.00 gal (US)
83.00 l

Service Refill Capacities - Scraper

Fuel Tank
201.60 gal (US)
763.00 l
Non-Powered Wheel
1.10 gal (US)
4.00 l

Standards

Standards
Standards

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

Bore
5.10 in
130.00 mm
Displacement
763.00 in³
12.50 l
Maximum Power - All Gears - ISO 14396
407.00 HP
304.00 kW
Maximum Power Reference Engine Speed
1700.00 r/min
1700.00 r/min
Stroke
6.20 in
157.00 mm
Tractor Engine
Cat® C13 ACERT™

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

Bore
5.10 in
130.00 mm
Displacement
763.00 in³
12.50 l
Maximum Power - All Gears - ISO 14396
407.00 HP
304.00 kW
Maximum Power Reference Engine Speed
1700.00 r/min
1700.00 r/min
Stroke
6.20 in
157.00 mm
Tractor Engine
Cat® C13 ACERT™
Features

Operator's Station

Operator Comfort

Power Train - Engine

Power Train - Transmission

Structures

Scraper Bowl

Loading Options

Integrated Technologies

Complete Customer Support

Safety

Sales Features

Operator’s Station

Ergonomically designed for all-day comfort, control and productivity.

Operator Comfort

High productivity from a comfortable, confident operator.

Power Train - Engine

The Cat® C13 ACERT™ engine are built for power, reliability and efficiency.

Power Train - Transmission

More power to the ground for greater productivity.

Structures

Superior design and construction delivers long term durability.

Scraper Bowl

Caterpillar designed and built for rugged performance and reliability.

Loading Options

Flexible loading options to adapt to changing job site conditions.

Integrated Technologies

Technology options to improve operator comfort and increase productivity.

Complete Customer Support

Cat® dealer services help you operate longer with lower costs.

Safety

Safety is an integral part of all machine and system designs.
Standard 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
  • Push-pull arrangement
  • Sequence Assist
  • Load Assist
  • Cat Grade Control
  • Secondary Steering
  • Fender extension, scraper
  • Powered access ladder
  • Cat Active Ride Management (ARM) seat
  • Fast fuel fill
  • HID Work lights
  • Low ambient fluids -51° C (-61° F)
  • Work Area Vision System (WAVS) - three cameras showing right side, cutting edge and directly behind machine, display in cab
  • External steering lock
  • Cab precleaner
  • Cab rotating beacon
  • Air horn