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.

Engine

Max. Power: 407.0 hp
Tractor: Cat® C13 ACERT™

Tractor Engine

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

Scraper Bowl

Scraper Capacity: Heaped: 24.0 yd3
Rated Load: 57600.0 lb
Heaped Capacity: 24.0 yd3
Maximum Apron Closure Force: 50580.0 lb
Maximum Apron Opening: 69.6 in
Maximum Depth of Cut: 12.4 in
Maximum Depth of Spread: 21.3 in
Maximum Ground Clearance at Cutting Edge: 23.4 in
Maximum Hydraulic Penetration Force: 130390.0 lb
Struck Capacity: 17.1 yd3
Thickness of Cutting Edge: 0.9 in
Width of Cut, Outside Router Bits: 123.5 in

Transmission

Top Speed (Loaded): 33.5 mph
1 Forward: 3.1 mph
2 Forward: 5.5 mph
3 Forward: 7.5 mph
4 Forward: 10.1 mph
5 Forward: 13.6 mph
6 Forward: 18.4 mph
7 Forward: 24.8 mph
8 Forward: 33.5 mph
Reverse: 5.7 mph

Hydraulics

Cushion Hitch Circuit Flow: 10.6 gal/min
Cushion Hitch Cylinder Bore: 5.5 in
Cushion Hitch Cylinder Stroke: 9.9 in
Push/Pull Bail Cylinder Bore: 3.5 in
Push/Pull Bail Cylinder Stroke: 16.3 in
Scraper Circuit Flow: 66.0 gal/min
Secondary Steering Circuit Flow: 10.3 gal/min
Steering Circuit Flow: 61.8 gal/min
Steering Cylinder Bore: 5.0 in
Steering Cylinder Stroke: 44.4 in
Bowl Cylinder Bore: 5.5 in
Bowl Cylinder Stroke: 33.3 in
Apron Cylinder Bore: 5.9 in
Apron Cylinder Stroke: 22.2 in
Ejector Cylinder Bore: 5.5 in
Ejector Cylinder Stroke: 61.0 in

Steering

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

Service Refill Capacities - Tractor

Engine Crankcase: 8.75 gal
Windshield Washer Reservoir: 1.3 gal
Transmission: 18.5 gal
Differential: 45.8 gal
Final Drive (per side): 5.0 gal
Cooling System: 17.0 gal
Hydraulic Reservoir: 22.0 gal

Service Refill Capacities - Scraper

Fuel Tank: 201.6 gal
Non-Powered Wheel: 1.1 gal

Standards

Standards: Standards

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

Bore: 5.1 in
Displacement: 763.0 in3
Max. Power (All Gears) (ISO 14396): 407.0 hp
Max. Power Reference Engine Speed: 1700.0 RPM
Stroke: 6.2 in
Tractor Engine: Cat® C13 ACERT™

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

Bore: 5.1 in
Displacement: 763.0 in3
Max. Power (All Gears) (ISO 14396): 407.0 hp
Max. Power Reference Engine Speed: 1700.0 RPM
Stroke: 6.2 in
Tractor Engine: Cat® C13 ACERT™

Weights - Machines meeting U.S. EPA Tier 4 Interim/EU Stage IIIB emission standards

Push-Pull - Loaded, based on a rated load: 141141.0 lb
Push-Pull - Operating Weight - full fuel tanks: 82541.0 lb
Push-Pull - Shipping Weight - 10% fuel: 81090.0 lb
Standard - Loaded, based on a rated load: 137374.0 lb
Standard - Operating Weight - full fuel tanks: 79774.0 lb
Standard - Shipping Weight - 10% fuel: 78279.0 lb

Weights - Machines achieving prior U.S. EPA Tier 3/EU Stage IIIA emission levels

Push-Pull - Loaded, based on a rated load: 135597.0 lb
Push-Pull - Operating Weight - full fuel tanks: 81996.0 lb
Push-Pull - Shipping Weight - 10% fuel: 80502.0 lb
Standard - Loaded, based on a rated load: 136830.0 lb
Standard - Operating Weight - full fuel tanks: 79230.0 lb
Standard - Shipping Weight - 10% fuel: 77735.0 lb

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

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