621 Wheel Tractor-Scraper
US
Metric
Overview
Our wheel tractor-scrapers have long been considered the basic method of moving volumes of material, and the Cat® 621 Wheel Tractor-Scraper is no exception. Known for its ability to be push-loaded and high travel speeds, it’s always an earthmover’s first tool of choice when working in challenging load areas. With an open bowl and a single engine, this machine is designed to handle a wide range of material types ranging from sand to ripped rock 609.6 mm (24 ") or less in size.
General
Overall Shipping Height
13.22 ft
4.03 m
Overall Width
11.75 ft
3.58 m
Scraper Capacity - Heaped
24.00 yd³
18.40 m³
Fuel Tank Refill Capacity - Scraper
216.10 gal (US)
818.00 l
Tires - Scraper
33.25R29**E3
Width - Cut
10.30 ft
3.14 m
Maximum Depth of Spread
21.30 in
540.00 mm
Top Speed - Loaded
33.50 mile/h
53.90 km/h
Rated Load
26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons)
180° Curb-to-Curb Turning Width
38.71 ft
11.80 m
Scraper Capacity - Struck
17.10 yd³
13.00 m³
Maximum Depth of Cut
12.40 in
315.00 mm
Tires - Tractor Drive
33.25R29**E3
Engine
Engine Model - Tractor
Cat C13
Flywheel Power - Tractor
407.00 HP
304.00 kW
Note
Cat C13 engine meets U.S. Environmental Protection Agency (EPA) Tier 4 Final/EU Stage IV engine emission standards.
Rated Engine RPM - Tractor
2000.00 r/min
2000.00 r/min
Tractor Engine
Flywheel Power - Tractor/Scraper
304 kW (407 hp)
Scraper Bowl
Scraper Capacity - Heaped
24.00 yd³
18.40 m³
Transmission
Top Speed - Loaded
33.50 mile/h
53.90 km/h
Service Refill Capacities
Hydraulic System
21.93 gal (US)
83.00 l
Crankcase
8.08 gal (US)
30.58 l
Transmission System
24.76 gal (US)
93.00 l
Cooling System
11.89 gal (US)
45.00 l
Fuel Tank
216.09 gal (US)
818.00 l
Diesel Exhaust Fluid
8.06 gal (US)
30.50 l
Dimensions
Width - Overall Machine
141.10 in
3585.00 mm
Width - Tractor
133.10 in
3381.00 mm
Width - Inside of Bowl
120.00 in
3048.00 mm
Width - Outside Rear Tires
128.90 in
3275.00 mm
Height - Overall Shipping
158.60 in
4029.00 mm
Height - Top of Cab
142.20 in
3612.00 mm
Ground Clearance - Tractor
21.90 in
557.00 mm
Front of Tractor to Front Axle
122.80 in
3119.00 mm
Axle to Vertical Hitch Pin
21.30 in
540.00 mm
Height - Scraper Blade Maximum
20.50 in
520.00 mm
Wheel Base
314.90 in
7998.00 mm
Rear Axle - Rear of Machine
114.10 in
2898.00 mm
Length - Overall Machine - Standard
551.80 in
14015.00 mm
Length - Maximum (Push-Pull)
613.20 in
15576.00 mm
Width - Overall Machine - Ladder Down
149.20 in
3790.00 mm
Width - Rear Tire Centers
90.20 in
2290.00 mm
Non Push-Pull
Operating Weight - Empty
79787.00 lb
36185.00 kg
Overall Length
45.90 ft
14.02 m
Push-Pull
Overall Length - With Bail Down
51.10 ft
15.58 m
Operating Weight - Empty
80630.00 lb
36567.00 kg
Cab
Exterior Sound Level
The exterior sound power level for the standard machine (ISO 6393:2008) is 118 dB(A).
ROPS/FOPS
Meets SAE and ISO standards
Safety Criteria Compliance Standards
Rollover Protection Structure (ROPS)
ISO 3471:2008 for up to 17 084 kg (37,664 lb)
Brakes
ISO 3450:1996
Reverse Alarm
ISO 9533:2010
Falling Object Protective Structure (FOPS)
ISO 3449:2005 Level II
Seat Belt
SAE J386:JUN1985
Steering System
ISO 5010:2007
Travel Speeds - Runout
Transmission Gear - Seventh
24.80 mile/h
39.90 km/h
Transmission Gear - Fifth
13.60 mile/h
21.90 km/h
Transmission Gear - First
3.10 mile/h
5.00 km/h
Transmission Gear - Sixth
18.40 mile/h
29.60 km/h
Transmission Gear - Second
5.50 mile/h
8.90 km/h
Transmission Gear - Third
7.50 mile/h
12.10 km/h
Transmission Gear - Fourth
10.10 mile/h
16.30 km/h
Transmission Gear - Eighth
33.50 mile/h
53.90 km/h
Transmission Gear - Reverse
5.70 mile/h
9.20 km/h
Implement Cycle Times
Apron Raise
2.95 s
2.95 s
Bowl Raise
3.00 s
3.00 s
Ejector Retract
6.70 s
6.70 s
Bowl Lower
3.50 s
3.50 s
Apron Lower
3.80 s
3.80 s
Ejector Extend
5.20 s
5.20 s
Bail Lower
3.20 s
3.20 s
Bail Raise
1.80 s
1.80 s
Features
BE MORE PRODUCTIVE
WORK IN COMFORT
DESIGNED FOR SAFETY
EASY TO OPERATE
INTEGRATED CAT TECHNOLOGIES
EXECUTE EFFICIENCY
Standard Equipment
- NOTE
- Standard and optional equipment may vary. Consult your Cat dealer for details.
- POWER TRAIN - TRACTOR
- Cat C13 engine with MEUI™
- Cat engine brake
- Electric start, 24 Volt
- Air cleaner, dry type with precleaner
- Fan, hydraulic
- Ground level engine shutdown
- Radiator, aluminum unit core, 9 fins per inch
- Guard, crankcase
- Muffler (only for less or non-regulated regions engine arrangement only)
- Starting aid, ether
- Braking system: - Primary and secondary, wet disc, hydraulic - Parking, hydraulic-released, spring-applied - Throttle lock
- Transmission: - 8-speed planetary power shift - ECPC control - APECS software - Programmable top gear selection - Transmission hold - Differential lock - Guard, power train - Standard tire spin reduction - Ground speed control - Machine speed limit - Differential lock protection
- POWER TRAIN - SCRAPER
- Braking system: - Primary and secondary, wet disc, hydraulic
- ELECTRICAL - TRACTOR
- Alternator, 150 Amp
- Batteries (4), 12V, 1,000 CCA, maintenance free, high output
- Electrical system, 24V
- Lighting system: - Headlights, halogen - Turn signals with hazard function, LED floodlights, (2) cutting edge (1) bowl, halogen 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
- ROPS/FOPS cab, pressurized
- Keypad switches: - Throttle lock - Wipers/washers - Hazard lights - Retarding level select - Work lights on, off - Information mode on Messenger Display
- Safety tab rocker switches
- Seat belt, static two-piece
- Seat, Cat Advanced Ride Management (ARM), Cat Comfort Series 3, rotates 30 degrees
- Steering wheel, tilt, telescoping, padded
- 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 temperature - Engine oil temperature - Hydraulic oil temperature - DPF temperature - Fuel level - Park brake - Implement lockout - Brake system - Regeneration required - Throttle lock - System voltage - Secondary steering - Bail down - Ejector auto - Differential lock - Apron float - Transmission hold - Cushion hitch - High beam lights - Action lamp - Engine speed, rpm - Gear selection - DEF fill levels
- FLUIDS
- Extended Life Coolant to -37° C (-34° F)
- OTHER STANDARD EQUIPMENT - TRACTOR
- Advanced cushion hitch
- Accumulators (cushion hitch) with Canadian Registration Number (CRN)
- Fast oil change
- Fenders, non-metallic
- Heater, engine coolant 120V
- Rims (2)
- Tow pin, front
- Vandalism locks
- Heater, engine coolant 120V
- OTHER STANDARD EQUIPMENT - SCRAPER
- Bowl: - 18.4 m3 (24 yd3), heaped - 14.1 m3 (18.4 yd3), struck
- Vandalism locks
- Hydraulic position sensing cylinders (bowl lift and apron)
Optional Equipment
- NOTE
- Standard and optional equipment may vary. Consult your Cat dealer for details.
- STEERING ARRANGEMENTS
- Secondary Steering Arrangement
- INTEGRATED TECHNOLOGIES
- Sequence Assist Arrangement
- Load Assist
- Cat Grade Control with Load Assist
- WORK LIGHT ATTACHMENTS
- HID work lights
- AMBIENT CAPABILITY ARRANGEMENTS
- Cooling, high ambient HRC
- Cooling, low ambient HRC
- Cooling, high ambient LRC
- Cooling, low ambient LRC
- OTHER ATTACHMENTS
- Camera arrangement - WAVS
- Steering lock - external
- Cab beacon
- Air horn
- Air horn and beacon
- Fender, scraper
- Guard, overflow
- Wiring group
- Year of manufacture plate
- SERVICE INSTRUCTIONS
- Film arrangement - U.S. (ANSI)
- Film arrangement - International (ISO)