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.
SPECIFICATIONS
Flywheel Power: Tractor/Scraper304 kW (407 hp)
Scraper Capacity: Heaped18.3 m3
Rated Load26127.0 kg
BENEFITS AND FEATURES
power train engine
The Cat® C13 ACERT™ engine are built for power, reliability and efficiency.
LEARN MOREtractor engine
Flywheel Power: Tractor/Scraper304 kW (407 hp)
scraper bowl
Scraper Capacity: Heaped18.3 m3
Rated Load26127.0 kg
Heaped Capacity18.3 m3
Maximum Apron Closure Force225.0 kN
Maximum Apron Opening1767.0 mm
Maximum Depth of Cut315.0 mm
Maximum Depth of Spread540.0 mm
Maximum Ground Clearance at Cutting Edge594.0 mm
Maximum Hydraulic Penetration Force580.0 kN
Struck Capacity13.0 m3
Thickness of Cutting Edge22.0 mm
Width of Cut, Outside Router Bits3136.0 mm
transmission
Top Speed (Loaded)53.9 km/h
1 Forward5.0 km/h
2 Forward8.9 km/h
3 Forward12.1 km/h
4 Forward16.3 km/h
5 Forward21.9 km/h
6 Forward29.6 km/h
7 Forward39.9 km/h
8 Forward53.9 km/h
Reverse9.2 km/h
engine
Max. Power304.0 kW
TractorCat® C13 ACERT™
tractor engine us epa tier 4 interimeu stage iiib
Bore130.0 mm
Displacement12.5 L
Max. Power (All Gears) (ISO 14396)304.0 kW
Max. Power Reference Engine Speed1700.0 RPM
Stroke157.0 mm
Tractor EngineCat® C13 ACERT™
tractor engine prior us epa tier 3eu stage iiia configuration*
Bore130.0 mm
Displacement12.5 L
Max. Power (All Gears) (ISO 14396)304.0 kW
Max. Power Reference Engine Speed1700.0 RPM
Stroke157.0 mm
Tractor EngineCat® C13 ACERT™
service refill capacities scraper
Fuel Tank763.0 L
Non-Powered Wheel4.0 L
service refill capacities tractor
Engine Crankcase33.0 L
Windshield Washer Reservoir5.0 L
Transmission70.0 L
Differential173.0 L
Final Drive (per side)19.0 L
Cooling System64.0 L
Hydraulic Reservoir83.0 L
weights machines meeting us epa tier 4 interimeu stage iiib emission standards
Push-Pull - Loaded, based on a rated load63567.0 kg
Push-Pull - Operating Weight - full fuel tanks37440.0 kg
Push-Pull - Shipping Weight - 10% fuel36782.0 kg
Standard - Loaded, based on a rated load62312.0 kg
Standard - Operating Weight - full fuel tanks36185.0 kg
Standard - Shipping Weight - 10% fuel35507.0 kg
standards
StandardsStandards
steering
Steering Angle - Right85º
Steering Angle - Left82º
weights machines achieving prior us epa tier 3eu stage iiia emission levels
Push-Pull - Loaded, based on a rated load63320.0 kg
Push-Pull - Operating Weight - full fuel tanks37193.0 kg
Push-Pull - Shipping Weight - 10% fuel36515.0 kg
Standard - Loaded, based on a rated load62065.0 kg
Standard - Operating Weight - full fuel tanks35938.0 kg
Standard - Shipping Weight - 10% fuel35260.0 kg
hydraulics
Cushion Hitch Circuit Flow40.1 L/min
Cushion Hitch Cylinder Bore140.0 mm
Cushion Hitch Cylinder Stroke251.0 mm
Push/Pull Bail Cylinder Bore90.0 mm
Push/Pull Bail Cylinder Stroke415.0 mm
Scraper Circuit Flow250.0 L/min
Secondary Steering Circuit Flow39.0 L/min
Steering Circuit Flow234.0 L/min
Steering Cylinder Bore127.0 mm
Steering Cylinder Stroke1128.0 mm
Bowl Cylinder Bore140.0 mm
Bowl Cylinder Stroke845.0 mm
Apron Cylinder Bore150.0 mm
Apron Cylinder Stroke565.0 mm
Ejector Cylinder Bore140.0 mm
Ejector Cylinder Stroke1550.0 mm
BENEFITS AND FEATURES
POWER TRAIN - ENGINE
The Cat® C13 ACERT™ engine are built for power, reliability and efficiency.
LEARN MOREINTEGRATED TECHNOLOGIES
Technology options to improve operator comfort and increase productivity.
LEARN MORE621H 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
621H OPTIONS
- pushpull 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
MOTEUR
Ergonomically designed for all-day comfort, control and productivity.
BENEFITS AND FEATURES
Ergonomic Layout The all new H Series operator station is ergonomically designed for total machine control in a comfortable, productive and safe environment. All controls, levers, switches and gauges are positioned to maximize productivity and facilitate a reduction in operator fatigue.
Viewing Area Designed for excellent all-around visibility and clear sight lines to the job site, the large viewing area offers exceptional visibility to the front of the machine as well as to the cutting edge. The air conditioning unit has been relocated to beneath the cab, allowing the operator enhanced visibility.
High productivity from a comfortable, confident operator.
BENEFITS AND FEATURES
Spacious Cab With a 21% larger cab, H Series scrapers offer a comfortable working space. The larger cab and wider door make getting in and out of the cab easier. The increased glass area enhances visibility around the machine.
Steering Column The steering column and pedals have been relocated for more comfortable operation when the seat is angled during machine operation. The telescopic and tilt adjustable steering column maintains a comfortable driving position regardless of operator size.
Standard Comfort Features The H Series cab is equipped with features designed to maintain operator comfort. Standard comfort features include: coat hook, lunchbox storage platform with strap, air conditioning, heat, and radio-ready.
Seat Options H Series scrapers use the Cat Comfort Seat with additional travel to allow the operator to position themselves for optimal comfort and productivity. The seat rotates up to 30 degrees to the right for a more comfortable position during loading and 30 degrees to the left to make getting in and out of the cab easier. For unparalleled ride comfort, H Series scrapers are equipped with the Cat Advanced Ride Management (ARM) seat suspension which uses an active suspension to dampen vibration and minimize end-of-stroke shock loads to the operator.
Integrated Technologies The optional Sequence Assist, Load Assist, and Cat Grade Control automate many repetitive operator tasks.
T-Handle Implement Control Lever The redesigned control lever puts all of the scraper functions in the palm of the operator’s hand. The low-effort lever and convenient push-button and thumb wheel controls are ergonomically placed for minimum arm movement.
The Cat® C13 ACERT™ engine are built for power, reliability and efficiency.
BENEFITS AND FEATURES
ACERT Technology The Cat® C13 ACERT™ engine continues the evolutionary, incremental improvements that provide breakthrough engine technology built on systems and components developed by Caterpillar with proven reliability. The engine is available with either U.S. EPA Tier 3/EU Stage IIIA equivalent emission configurations or U.S. EPA Tier 4 Interim/EU Stage IIIB certified emission configurations to meet the needs of contractors around the world.
Emissions Machines equipped with engines meeting U.S. EPA Tier 4 Interim/EU Stage IIIB emission standards are equipped with a Cat Clean Emission Module to deliver the performance and efficiency that customers demand while meeting emission requirements. Machines equipped with the U.S. EPA Tier 3/EU Stage IIIA equivalent engines are equipped with a muffler in place of the Cat Clean Emission Module.
Cat Clean Emission Module (CEM) CEM is an exhaust aftertreatment package consisting of a diesel particulate filter, and control systems. The CEM reduces particulate emissions using passive and active regeneration during normal engine operation.
Cat NOx Reduction System (NRS) The Cat NOx Reduction System (NRS) captures and cools a small quantity of exhaust gas, then routes it into the combustion chamber where it drives down combustion temperatures and reduces NOx emissions.
Diesel Particulate Filter Regeneration Regeneration is the removal of soot from the Diesel Particulate Filter (DPF). The Aftertreatment Regeneration Device (ARD) is used to regenerate the DPF. The DPF traps both particulates and ash, the ash is removed at regular service intervals.
More power to the ground for greater productivity.
BENEFITS AND FEATURES
Electronic Transmission The Cat eight-speed forward one-speed reverse Electronic Clutch Pressure Controlled (ECPC) transmission features enhanced shift control logic with anti-hunt shift strategy for speed continuity, and to ensure constant shift times.
- Tractor gears 1-2 - converter drive for increased torque, gears 3-8 - direct-drive for drive train efficiency. Scraper gears use converter drive for more torque in the cut.
- Transmission Hold maintains converter drive for maximum rimpull or holds current gear for best control.
- Programmable Top Gear manually sets top gear available (3rd-8th) to match conditions or speed.
- Neutral Coast Inhibitor prevents transmission shifts into neutral while moving.
Smooth Transmission Gear Shifting The 621H features ECPC Shift Torque Management (STM), with improved Shift Control Logic (SCL) and Part Throttle Shifting (PTS). These features allow smoother shifting and greater acceleration on grades while torque is maintained through the shift changes. SCL also provides automatic shift selection that is more specific to the desired machine operation, and downshifts when needed for maximum acceleration when increased throttle is applied. PTS allows shifting at lower speeds during part throttle operation, resulting in improved part throttle fuel economy, quieter machine operation, and better maneuvering in reduced speed operating conditions.
Brake Performance The 621H uses hydraulically-actuated wet disc brakes for exceptional brake performance. The standard Cat Engine Brake reduces brake wear and enhances machine control.
Superior design and construction delivers long term durability.
BENEFITS AND FEATURES
Cushion Hitch Electronically actuated with parallelogram-type linkage for exceptional strength, with two nitrogen accumulators (4) using free-floating pistons (8) to deliver a smooth ride for enhanced operator comfort and machine durability.
- controlled oil flow (6) dampens rebound oscillation
- leveling valve (7) applies pressure via an orifice (5) to automatically center the piston in load cylinder (1)
- steel castings are used to eliminate many welded joints and increase strength
- double-kingbolt design (2, 3) withstands high external forces, simplifies installation and removal
Lockout Switch An operator-selectable lockout switch, located on the joystick, locks the cushion hitch down for improved control of the cutting edge during loading and dumping.
Nitrogen Accumulator Vertically mounted hydraulic cylinder transfers road shocks to nitrogen accumulators. Nitrogen accumulator absorbs and dampens road shocks, thus preventing the loads from being transmitted to the hitch components or to the operator.
Non-Metallic Fenders and Fuel Tank The new fuel tank is made of recyclable roto-milled polyethylene and keeps the fuel cleaner with controlled filtration and cleanout access ports. The new capacity of the new fuel tank has been increased, providing operators with 10 plus hour shifts depending on engine load factors. The new tractor fenders are made of the same highly durable, roto-milled polyethylene. The non-metallic fenders prevent material buildup when operating in sticky materials.
Caterpillar designed and built for rugged performance and reliability.
BENEFITS AND FEATURES
Redesigned Bowl The 621H uses a new bowl design than enhances productivity through a 9% increase in bowl capacity over previous models. The low profile design offers low resistance to incoming materials, while cellular constructions adds strength and dent resistance to the bowl sides and floor.
Hydraulic Lines Protection Hydraulic lines durability is increased by routing them through the bowl sidewalls where they are protected from damage on the job site.
Ejection System The powerful ejection system provides constant spreading control while minimizing carryback material. An overflow guard on the ejector helps retain material and keep it from spilling over onto the rear of the scraper.
Cutting Edges and Cat Ground Engaging Tools (GET) A variety of Ground Engaging Tools (G.E.T.) options are available to optimize the machine for different material types and loading conditions. GET options include standard, serrated, and abrasion resistant material (ARM). Most are reversible to provide long life and reduced operating costs.
Flexible loading options to adapt to changing job site conditions.
BENEFITS AND FEATURES
Push-Loading To achieve maximum productivity, the 621H should be push-loaded with a D8- or D9-size Track-Type Tractor.
Push-Pull The push-pull arrangement is recommended for applications that require a large amount of material to be moved very quickly at low cost per bank cubic meter (bank cubic yard). The push-pull arrangement concentrates the combined power of two machines onto one cutting edge. Push-pull scrapers work in pairs where the lead scraper is pushed through the cut by the trailing scraper. When the lead scraper is fully loaded, the trailing scraper lowers its bowl and is pulled through the cut by the lead scraper. The result is a self-loading system. The push-pull arrangement features a hydraulically-actuated bail and cushioned plate, which are bolted to the front of the tractor, and a hook that is attached to the rear of the scraper. Working together, push-pull scrapers can provide the lowest cost per meter (yard) for many applications. As a single-engine machine, the 621H push-pull arrangement is recommended for easy loading application with well maintained haul roads and grades of +5% or less.
Technology options to improve operator comfort and increase productivity.
BENEFITS AND FEATURES
Sequence Assist Sequence Assist uses integrated software and position-sensing cylinders to automate many of the tasks an operator performs when loading, hauling and dumping. The operator simply sets preferences for bowl and apron height and subsequently pushes a button to ready the machine for loading, then hauling, then dumping, and then the return to cut. The system automatically sets the cushion hitch, bowl height, apron, and ejector. Sequence Assist comes with a convenient load counter for tracking material moved. With Sequence Assist, up to 14 individual implement and machine commands are replaced by four touches of a button, allowing the operator additional time to prepare for the loading cycle and observation of the job site.
Load Assist Load Assist builds on Sequence Assist by loading the bowl with the push of a button. As the machine enters the cut, the operator can activate Load Assist so the system takes over control of the cutting edge height, limiting tire spin based on integrated sensors and GPS technology to ensure consistent and full bowl loads. The operator is responsible only for the throttle, steering, and operating the apron. Load Assist helps make inexperienced operators productive very quickly.
Cat Grade Control Cat Grade Control is an automatic system that helps you control costs by moving the maximum amount of material with the prime earthmover which often provides the lowest cost per unit of material moved. Using satellite positioning technology, the automatic system ensures cut protection by limiting how deep the scraper will dig. The optional system is available from the factory and fully integrated into the machine and works seamlessly with Sequence Assist and Load Assist. Additional benefits of Cat Grade Control include putting the site plan in front of the operator for increased efficiency and elimination of rework and using the scraper for site mapping.
Work Area Vision System (WAVS) Cameras on the machine provide views of the cutting edge, right side and rear. The system enhances safety and provides a new way to see the cutting edge during loading and to see to the rear of the machine when performing push-load or push-pull work with another scraper.
Cat® dealer services help you operate longer with lower costs.
BENEFITS AND FEATURES
Selection Make comparisons of the machines you are considering before you buy. Your Cat® dealer can help.
Purchase Consider the resale value, compare productivity and day-to-day operating costs and fuel consumption.
Operation For the best operating techniques to increase productivity and your profit, turn to your Cat dealer for the latest training literature and trained staff.
Maintenance Repair option programs guarantee the cost of repairs up front. Diagnostic programs such as S·O·SSM and Technical Analysis help you avoid unscheduled repairs.
Replacement Repair or rebuild? Your Cat dealer can help you evaluate the costs so you can make the right choice.
Product Support Your local Cat dealership will be with you every step of the way with its unsurpassed worldwide parts support, trained technicians and customer support agreements.
Safety is an integral part of all machine and system designs.
BENEFITS AND FEATURES
Powered Access Ladder A new powered access system option significantly reduces the effort required to climb into the cab. The system is a solid, stable angled ladder that folds out from underneath the cab. It is activated from a keypad located behind a service door at ground level. Controls are also located in the cab on a keypad. The ladder provides a rigid and angled base of support for easier climbing and descent. For added safety, the steps are illuminated by LED lights. An actuator under the cab operates the step. When not in use, the ladder retracts under the cab. An audible alarm sounds if the machine moves while the ladder is down. If power fails on the machine, the operator can raise or lower the steps manually using a lever inside the cab or outside next to the ladder’s top step.
Access and Egress Handrails and grab irons are provided for safe and secure entrance and exit of the cab as well as for performing daily maintenance.
Work Area Vision System (WAVS) Cameras on the machine provide views of the cutting edge, right side and rear. The system enhances safety and provides a new way to see the cutting edge during loading and to see to the rear of the machine when performing push-load or push-pull work with another scraper.