621K Wheel Tractor-Scraper

621K Wheel Tractor-Scraper

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Main Features and Benefits

• Tractor Serviceability Improvement - The filter bank located at the rear of the engine compartment has undergone improvements for serviceability by raising the filter bank up for easier access.

• Engine Over Speed Protection - In the event of an engine over speed situation, the compression brake or brakes will automatically engage with no operator input. The machine determines the over speed condition based on rate of acceleration and applies compression brakes automatically.

• Advanced Cushion Hitch - With similar technology as the Cat® Advanced Ride Management seat suspension, this software allows the cushion hitch to prevent end stroke by having the ability to predict end stroke events and manage the rate of dampening. The desired result is improved hitch repair, reduced maintenance and improved operator ride in rough conditions.

• High Pressure Steering - 620K Series steering system design requires significantly less steering effort. The reduced steering effort will allow for decreased operator fatigue and a more efficient operator resulting in possible higher rates of production late in the work cycle.

• Draft Arm Overflow Guards - The open bowls now come standard with bowl side overflow guards to help prevent material from flowing over the bowl sides and falling onto the draft arms where material becomes lodged between the bowl side and draft arm resulting in decreased work cycle times.

• Auto Stall - In cold weather conditions the machine will use the Auto Stall feature to help warm up the transmission oil faster resulting in the machine shifting out of torque converter drive (2nd gear) faster than on previous models.

• Differential Lock Engagement Protection (Standard) - This standard feature allows the machine to prevent the operator from engaging the differential lock when damage could occur.

• Cab Improved - The interior of the K Series cabs has improved the operator comfort and visibility by redesigning the dash area and key pad placement.

• Machine Speed Limit - This feature is designed to take the place of top gear selection. If the machine top speed needs to be limited the operator can select the top speed through the display or the top speed can be set in ET. This will allow the machine to find the correct gear that works best for the engine and transmission. Allowing the engine and transmission to select the correct gear to pull the load in most cases resulting in a lower engine load factor and lower fuel burn verses using top gear selection that required the machine to run at engine speeds at or close high idle.

• Ground Speed Control - Ground Speed Control sets the desired top speed by the operator if job site conditions or segment speed limits require a speed less than full run out. Machine Speed Limit is intended for use when top speed needs to be limited for longer durations and Ground Speed Control is intended for use when the top speed needs to be reduced for shorter segments or intermediate periods of time. The operator can set the desired top speed and the machine will find the correct gear that works best for the engine and transmission. Allowing the engine and transmission to select the correct gear to pull the load in most cases will result in a lower engine load factor and lower fuel burn verses top gear selection.

Tractor Engine

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

Scraper Bowl

Scraper Capacity: Heaped
24.0yd3

Transmission

Top Speed (Loaded)
33.5mph

Dimensions

Width - Overall Machine
141.1in
Width - Tractor
133.1in
Width - Inside of Bowl
120.0in
Width - Outside Rear Tires
128.9in
Height - Overall Shipping
158.6in
Height - Top of Cab
142.2in
Ground Clearance - Tractor
21.9in
Front of Tractor to Front Axle
122.8in
Axle to Vertical Hitch Pin
21.3in
Height - Scraper Blade Maximum
20.5in
Wheelbase
314.9in
Rear Axle to Rear of Machine
114.1in
Length - Maximum (Push-Pull)
613.2in
Length - Overall Machine (Standard)
551.8in
Width - Overall Machine - Ladder Down
149.2in
Width - Rear Tire Centers
90.2in

Engine

Engine Model: Tractor
Cat C13 ACERT™
Flywheel Power: Tractor
407.0hp
Note
Cat C13 ACERT engine meets U.S. Environmental Protection Agency (EPA) Tier 4 Final/EU Stage IV engine emission standards.
Rated Engine RPM: Tractor
2000.0RPM

Travel Speeds (Runout)

Transmission Gear: Eighth
33.5mph
Transmission Gear: Fifth
13.6mph
Transmission Gear: First
3.1mph
Transmission Gear: Fourth
10.1mph
Transmission Gear: Reverse
5.7mph
Transmission Gear: Second
5.5mph
Transmission Gear: Seventh
24.8mph
Transmission Gear: Sixth
18.4mph
Transmission Gear: Third
7.5mph

Push-Pull

Operating Weight (Empty)
80630.0lb
Overall Length (With Bail Down)
51.1ft

General Data

180° Curb-to-Curb Turning Width
38.71ft
Fuel Tank Refill Capacity: Scraper
201.0gal
Maximum Depth of Cut
12.4in
Maximum Depth of Spread
21.3in
Overall Shipping Height
13.22ft
Overall Width
11.71ft
Rated Load
26 127 kg (57,610 lb); 26.19 tonnes (28.81 tons)
Scraper Capacity: Heaped
24.0yd3
Scraper Capacity: Struck
17.1yd3
Tires: Scraper
33.25R29**E3
Tires: Tractor Drive
33.25R29**E3
Top Speed (Loaded)
33.5mph
Width of Cut
10.3ft

Cab

Exterior Sound Level
The exterior sound power level for the standard machine (ISO 6393) is 111.5 dB(A).
ROPS/FOPS
Meets SAE and ISO standards

Implement Cycle Times

Apron Lower
3.8Seconds
Apron Raise
2.95Seconds
Bail Lower
3.2Seconds
Bail Raise
1.8Seconds
Bowl Lower
3.5Seconds
Bowl Raise
3.0Seconds
Ejector Extend
5.2Seconds
Ejector Retract
6.7Seconds

Service Refill Capacities

Cooling System
11.89gal
Crankcase
8.08gal
Diesel Exhaust Fluid
8.0572gal
Fuel Tank
216.09gal
Hydraulic System
21.926gal
Transmission System
24.76gal

Non Push-Pull

Operating Weight (Empty)
79787.0lb
Overall Length
45.9ft

Safety Criteria Compliance Standards

Brakes
ISO 3450:1996
Falling Object Protective Structure (FOPS)
ISO 3449:2005 Level II
Reverse Alarm
ISO 9533:2010
Rollover Protection Structure (ROPS)
ISO 3471:2008 for up to 17 084 kg (37,664 lb)
Seat Belt
SAE J386:JUN1985
Steering System
ISO 5010:2007

Standard Equipment

  • Power Train - Tractor
    • Cat C13 ACERT 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

  • Steering Arrangements
    • Secondary Steering Arrangement
  • Integrated Technologies
    • Sequence Assist Arrangement
    • Load Assist
    • Cat Grade Control with Load Assist
  • Other Attachments
    • Camera arrangement - WAVS
    • Steering lock - external
    • Cab beacon
    • Air horn
    • Air horn and beacon
    • Fender, scraper
    • Guard, overflow
    • Wiring group
  • 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
    • Year of manufacture plate
  • Service Instructions
    • Film arrangement - U.S. (ANSI)
    • Film arrangement - International (ISO)