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631K - Tier 2 Open Bowl Scrapers

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.

631K - Tier 2

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The Cat® 631K - Tier 2 is built for reliable performance in the wheel tractor-scrapers range, backed by Al-Bahar's regional service and support network.

Flywheel Power - Tractor/Scraper
570 hp
Scraper Capacity - Heaped
34 yd³
Top Speed - Loaded
34.7 mile/h
Front of Tractor to Front Axle
142.2 in
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  • Specifications
  • Features
  • Standard Equipment

Specifications

General specifications
Overall Shipping Height 3.89 m
Maximum Depth of Spread 535 mm
Tires - Tractor 37.25R35**E3
Fuel Tank Refill Capacity - Scraper 874 l
Scraper Capacity - Struck 18.3 m³
Scraper Capacity - Heaped 26 m³
Top Speed - Loaded 55.8 km/h
Overall Width 3.94 m
Maximum Depth of Cut 450 mm
Width - Cut 3.51 m
180° Curb-to-Curb Turning Width 12.23 m
Rated Load 37 200 kg (82,200 lb); 37.2 tonnes (41.1 tons)
Tires - Scraper 37.25R35**E3

Features

EFFICIENCY THROUGH TECHNOLOGY

• Up to 12% improvement in productivity.
• Advanced productivity electronic control system (APECS) allows
the engine and transmission to communicate on a high level. This
communication allows the machine to better utilize the power and torque the engine is producing. The net result is moving more material.
• Use ground speed control to set the desired top speed and the machine will find the gear that works best for the engine and the transmission, providing a lower fuel burn.
• The machine speed limit feature replaces top gear selection,
allowing the machine to find the correct gear that works best for
the engine and transmission. Pulling the load in the correct gear, in
most cases, results in lower engine load factor and lower fuel burn.
• Auto-stall assists in quickly bringing the transmission to an
operating temperature at startup when the machine is working in a
cold climate region.
• Cat Payload Estimator for scrapers is an earthmoving solution for optimal payload and jobsite efficiency. Payload Estimator achieves on-the-go weighing by using bowl lift cylinder pressure during the loaded haul segment. Payload Estimator is optimized to be used with sequence assist, which provides increased productivity with less operator effort. Payload Estimator is an automatic feature when ordered with sequence assist.

OPERATOR COMFORT AND CONTROL

• Reduce up to 14 individual operator commands per cycle with sequence assist (optional attachment).
• Steer with less effort using the newly designed high-pressure
steering system.
• Enjoy interior improvements and a more ergonomic work environment with a 21% larger cab than the G Series cab.
• Intuitive, ergonomic controls keep operators focused on their work.
• Maintain desired cab temperature with automatic temperature control.

BUILT-IN SAFETY FEATURES

• Get in and out of the cab easier with the new powered access ladder system (optional attachment).
• Enhance an operator’s awareness of site surroundings with the optional work area vision system (WAVS).
• Seat belt indicator provides visual and audible alerts when the seat
belt is not in use.
• Advanced cushion hitch allows the cushion hitch to prevent end stroke by having the ability to predict end stroke events and manage the rate of dampening, resulting in reduced hitch maintenance and improved operator ride in rough conditions.
• Easy ground level access to fuel, water, and engine oil.

SAVE ON MAINTENANCE TIME

• The spacious cab features easy, intuitive controls and excellent
visibility. The cab provides a comfortable working environment for
all-day operation.
• Cat advanced ride management (ARM) seat suspension reduces
end stroke movement of the load cylinder for a smoother ride.
• Engine overspeed protection will automatically engage with no
operator input when the machine is in eighth gear. The machine will assist in slowing the machine speed by canceling the throttle command and engaging the engine compression brake.

631K Product Brochure

Complete 631K Product Brochure

Standard Equipment

NOTE
  • Standard and optional equipment may vary. Consult your Cat dealer for details.
POWER TRAIN – TRACTOR
  • Cat C18
  • Compression engine brake
  • Electric start, 24V
  • Air cleaner, dry type with precleaner
  • Fan, hydraulic
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, LED
    • 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)
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
OTHER STANDARD EQUIPMENT – SCRAPER
  • Bowl:
    • 18.3 m3 (24 yd3), struck
    • 26 m3 (34 yd3), heaped
  • Vandalism locks
  • Rims (2)
  • 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 with Payload Estimator
  • Load Assist
  • Cat Grade Control with Load Assist
  • Advanced Tire Spin Reduction

OTHER ATTACHMENTS

  • Camera arrangement – Work Area Vision System (WAVS)
  • Cab beacon
  • Air horn
  • Air horn and beacon
  • Fender, scraper

SERVICE INSTRUCTIONS

  • Film arrangement – International (ISO)