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Caterpillar
621 Wheel Tractor-Scraper
Flywheel Power – Tractor/Scraper
304 kW (407 hp)
304 kW (407 hp)
Scraper Capacity – Heaped
24 yd³
18.4 m³
Top Speed – Loaded
33.5 mile/h
53.9 km/h
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.
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Exterior
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Interior
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Details
Specifications
General
| Spec | Value |
|---|---|
| Maximum Depth of Cut | 12.4 in 315 mm |
| Fuel Tank Refill Capacity – Scraper | 216.1 gal (US) 818 l |
| 180° Curb-to-Curb Turning Width | 38.71 ft 11.8 m |
| Scraper Capacity – Heaped | 24 yd³ 18.4 m³ |
| Overall Width | 11.75 ft 3.58 m |
| Maximum Depth of Spread | 21.3 in 540 mm |
| Overall Shipping Height | 13.22 ft 4.03 m |
| Tires – Tractor Drive | 33.25R29**E3 33.25R29**E3 |
| Width – Cut | 10.3 ft 3.14 m |
| Scraper Capacity – Struck | 17.1 yd³ 13 m³ |
| Top Speed – Loaded | 33.5 mile/h 53.9 km/h |
| Tires – Scraper | 33.25R29**E3 33.25R29**E3 |
| Rated Load | 26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons) 26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons) |
Engine
| Spec | Value |
|---|---|
| Note | Cat® C13 engine meets U.S. Environmental Protection Agency (EPA) Tier 4 Final/EU Stage IV engine emission standards. Cat® C13 engine meets U.S. Environmental Protection Agency (EPA) Tier 4 Final/EU Stage IV engine emission standards. |
| Flywheel Power – Tractor | 407 hp 304 kW |
| Rated Engine RPM – Tractor | 2000 r/min 2000 r/min |
| Engine Model – Tractor | Cat® C13 Cat® C13 |
Tractor Engine
| Spec | Value |
|---|---|
| Flywheel Power – Tractor/Scraper | 304 kW (407 hp) 304 kW (407 hp) |
Scraper Bowl
| Spec | Value |
|---|---|
| Scraper Capacity – Heaped | 24 yd³ 18.4 m³ |
Transmission
| Spec | Value |
|---|---|
| Top Speed – Loaded | 33.5 mile/h 53.9 km/h |
Service Refill Capacities
| Spec | Value |
|---|---|
| Fuel Tank | 216.09 gal (US) 818 l |
| Crankcase | 8.08 gal (US) 30.58 l |
| Hydraulic System | 21.926 gal (US) 83 l |
| Diesel Exhaust Fluid | 8.057 gal (US) 30.5 l |
| Cooling System | 11.89 gal (US) 45 l |
| Transmission System | 24.76 gal (US) 93 l |
Dimensions
| Spec | Value |
|---|---|
| Width – Overall Machine | 141.1 in 3585 mm |
| Width – Tractor | 133.1 in 3381 mm |
| Width – Inside of Bowl | 120 in 3048 mm |
| Width – Outside Rear Tires | 128.9 in 3275 mm |
| Height – Overall Shipping | 158.6 in 4029 mm |
| Height – Top of Cab | 142.2 in 3612 mm |
| Ground Clearance – Tractor | 21.9 in 557 mm |
| Front of Tractor to Front Axle | 122.8 in 3119 mm |
| Axle to Vertical Hitch Pin | 21.3 in 540 mm |
| Height – Scraper Blade Maximum | 20.5 in 520 mm |
| Wheel Base | 314.9 in 7998 mm |
| Rear Axle – Rear of Machine | 114.1 in 2898 mm |
| Width – Overall Machine – Ladder Down | 149.2 in 3790 mm |
| Length – Overall Machine – Standard | 551.8 in 14015 mm |
| Length – Maximum (Push-Pull) | 613.2 in 15576 mm |
| Width – Rear Tire Centers | 90.2 in 2290 mm |
Non Push-Pull
| Spec | Value |
|---|---|
| Overall Length | 45.9 ft 14.02 m |
| Operating Weight – Empty | 79787 lb 36185 kg |
Push-Pull
| Spec | Value |
|---|---|
| Operating Weight – Empty | 80630 lb 36567 kg |
| Overall Length – With Bail Down | 51.1 ft 15.58 m |
Cab
| Spec | Value |
|---|---|
| Exterior Sound Level | The exterior sound power level for the standard machine (ISO 6393:2008) is 118 dB(A). The exterior sound power level for the standard machine (ISO 6393:2008) is 118 dB(A). |
| ROPS/FOPS | Meets SAE and ISO standards Meets SAE and ISO standards |
Safety Criteria Compliance Standards
| Spec | Value |
|---|---|
| Reverse Alarm | ISO 9533:2010 ISO 9533:2010 |
| Brakes | ISO 3450:1996 ISO 3450:1996 |
| Rollover Protection Structure (ROPS) | ISO 3471:2008 for up to 17 084 kg (37,664 lb) ISO 3471:2008 for up to 17 084 kg (37,664 lb) |
| Falling Object Protective Structure (FOPS) | ISO 3449:2005 Level II ISO 3449:2005 Level II |
| Steering System | ISO 5010:2007 ISO 5010:2007 |
| Seat Belt | SAE J386:JUN1985 SAE J386:JUN1985 |
Travel Speeds - Runout
| Spec | Value |
|---|---|
| Transmission Gear – Eighth | 33.5 mile/h 53.9 km/h |
| Transmission Gear – Third | 7.5 mile/h 12.1 km/h |
| Transmission Gear – Fourth | 10.1 mile/h 16.3 km/h |
| Transmission Gear – First | 3.1 mile/h 5 km/h |
| Transmission Gear – Fifth | 13.6 mile/h 21.9 km/h |
| Transmission Gear – Reverse | 5.7 mile/h 9.2 km/h |
| Transmission Gear – Seventh | 24.8 mile/h 39.9 km/h |
| Transmission Gear – Sixth | 18.4 mile/h 29.6 km/h |
| Transmission Gear – Second | 5.5 mile/h 8.9 km/h |
Implement Cycle Times
| Spec | Value |
|---|---|
| Ejector Retract | 6.7 s 6.7 s |
| Bail Raise | 1.8 s 1.8 s |
| Apron Raise | 2.95 s 2.95 s |
| Apron Lower | 3.8 s 3.8 s |
| Ejector Extend | 5.2 s 5.2 s |
| Bowl Raise | 3 s 3 s |
| Bowl Lower | 3.5 s 3.5 s |
| Bail Lower | 3.2 s 3.2 s |
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
INTEGRATED TECHNOLOGIES
- Sequence Assist and Cat Payload Arrangement
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
- Camera arrangement – WAVS
- 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
- Interactive touchscreen vehicle information 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
- Fender, 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
- Cat Grade Control, Cat Payload, Sequence Assit, and Load Assist
OTHER ATTACHMENTS
- Steering lock – external
- Cab beacon with air horn
- Air horn
- Air horn and beacon
- Wiring group
- Year of manufacture plate
OTHER STANDARD EQUIPMENT – SCRAPER
- Bowl overflow guard
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
SERVICE INSTRUCTIONS
- Film arrangement – U.S. (ANSI)
- Film arrangement – International (ISO)