631K 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.

Scraper Capacity: Heaped
34 yd3
Top Speed (Loaded)
34.7 mph
Width – Overall Machine
155 in
Width – Tractor
137.8 in

Specs

Scraper Bowl

Scraper Capacity: Heaped
34yd3
Scraper Capacity - Heaped
34yd³

Transmission

Top Speed (Loaded)
34.7mph
Top Speed - Loaded
34.7mile/h

Dimensions

Width – Overall Machine
155in
Width – Tractor
137.8in
Width – Inside of Bowl
134in
Width – Outside Rear Tires
143.2in
Height – Overall Shipping
153.2in
Height – Top of Cab
147in
Ground Clearance – Tractor
26.1in
Front of Tractor to Front Axle
142.2in
Axle to Vertical Hitch Pin
20in
Height – Scraper Blade Maximum
20in
Wheelbase
346.8in
Rear Axle to Rear of Machine
108in
Length – Overall Machine (Standard)
597in
Width – Rear Tire Centers
96.9in
Length - Maximum (Push-Pull)
655.1in
Front of Tractor to Front Axle
142.2in
Axle to Vertical Hitch Pin
20in
Wheel Base
346.8in
Rear Axle - Rear of Machine
108in
Ground Clearance - Tractor
26.1in
Height - Overall Shipping
153.2in
Height - Scraper Blade Maximum
20in
Height - Top of Cab
147in
Length - Overall Machine - Standard
597in
Width - Inside of Bowl
134in
Width - Outside Rear Tires
143.2in
Width - Overall Machine
155in
Width - Rear Tire Centers
96.9in
Width - Tractor
137.8in

Engine

Flywheel Power: Tractor
570hp
Emissions
Cat C18 ACERT engine meets U.S. EPA Tier 4 Final/EU Stage IV emission standards.
Engine Model - Tractor
Cat C18
Rated Engine RPM - Tractor
1900r/min
Emissions
Cat C18 engine meets U.S. EPA Tier 4 Final/EU Stage IV emission standards.
Flywheel Power - Tractor
570HP

Travel Speeds (Runout)

Transmission Gear: Eighth
34.7mph
Transmission Gear: Fifth
14.1mph
Transmission Gear: First
3.4mph
Transmission Gear: Fourth
10.5mph
Transmission Gear: Reverse
6.2mph
Transmission Gear: Second
6.2mph
Transmission Gear: Seventh
25.7mph
Transmission Gear: Sixth
19.0mph
Transmission Gear: Third
7.7mph

General Data

180° Curb-to-Curb Turning Width
40.12ft
Fuel Tank Refill Capacity: Scraper
231gal
Maximum Depth of Cut
17.7in
Maximum Depth of Spread
21.1in
Overall Shipping Height
12.75ft
Overall Width
12.93ft
Rated Load
37 200 kg (82,200 lb); 37.2 tonnes (41.1 tons)
Scraper Capacity: Heaped
34yd3
Scraper Capacity: Struck
24yd3
Tires: Scraper
37.25R35**E3
Tires: Tractor
37.25R35**E3
Top Speed (Loaded)
34.7mph
Width of Cut
11.50ft

Cab

Exterior Sound Level
The exterior sound power level for the standard machine (ISO 6393) is 111.5 dB(A).
ROPS/FOPS
ROPS/FOPS meet “ISO Standards.”
Exterior Sound Level
The exterior sound power level for the standard machine (ISO 6393) is 111.5 dB(A).
ROPS/FOPS
ROPS/FOPS meet “ISO Standards.”

Implement Cycle Times

Apron Lower
3.8seconds
Apron Raise
4.0seconds
Bail Lower
2.1seconds
Bail Raise
1.5seconds
Bowl Lower
3.5seconds
Bowl Raise
3.5seconds
Ejector Extend
8.5seconds
Ejector Retract
8.5seconds
Apron Lower
3.8s
Apron Raise
4s
Bail Lower
2.1s
Bail Raise
1.5s
Bowl Lower
3.5s
Bowl Raise
3.5s
Ejector Extend
8.5s
Ejector Retract
8.5s

Service Refill Capacities

Cooling System
19.8gal
Crankcase (Tractor)
13.7gal
Diesel Exhaust Fluid (DEF)
8gal
Fuel Tank
231gal
Hydraulic System
37.5gal
Transmission System
29gal
Cooling System
19.8gal (US)
Crankcase - Tractor
13.7gal (US)
Diesel Exhaust Fluid (DEF)
8gal (US)
Fuel Tank
231gal (US)
Hydraulic System
37.5gal (US)
Transmission System
29gal (US)

Safety Criteria Compliance Standards

Brakes
ISO 3450:2011
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 21 282 kg (46,919 lb)
Seat Belt
SAE J386:FEB2006
Steering System
ISO 5010:2007
Brakes
ISO 3450:2011
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 21 282 kg (46,919 lb)
Seat Belt
SAE J386:FEB2006
Steering System
ISO 5010:2007

Tractor Engine

Flywheel Power - Tractor/Scraper
570HP

Push-Pull

Operating Weight - Empty
106430lb
Overall Length - With Bail Down
54.59ft

Non Push-Pull

Operating Weight - Empty
102750lb
Overall Length
49.34ft

General

180° Curb-to-Curb Turning Width
40.12ft
Fuel Tank Refill Capacity - Scraper
231gal (US)
Maximum Depth of Cut
17.7in
Maximum Depth of Spread
21.1in
Overall Shipping Height
12.75ft
Overall Width
12.93ft
Rated Load
37 200 kg (82,200 lb); 37.2 tonnes (41.1 tons)
Scraper Capacity - Heaped
34yd³
Scraper Capacity - Struck
24yd³
Tires - Scraper
37.25R35**E3
Tires - Tractor
37.25R35**E3
Top Speed - Loaded
34.7mile/h
Width - Cut
11.5ft

Travel Speeds - Runout

Transmission Gear - Eighth
34.7mile/h
Transmission Gear - Fifth
14.1mile/h
Transmission Gear - First
3.4mile/h
Transmission Gear - Fourth
10.5mile/h
Transmission Gear - Reverse
6.2mile/h
Transmission Gear - Second
6.2mile/h
Transmission Gear - Seventh
25.7mile/h
Transmission Gear - Sixth
19mile/h
Transmission Gear - Third
7.7mile/h

Features

EFFICIENCY THROUGH TECHNOLOGY

  • The Payload Estimator will calculate the payload of the machine in tonnes or tons by measuring the bowl lift cylinder pressures at the beginning of the loaded haul segment. This feature works best when using Sequence Assist. Using Payload Estimator during testing has achieved better than 95% accuracy when compared to actual scale weights. The Payload Estimator feature comes automatically when a machine is ordered with Sequence Assist.
  • Load Assist (Optional) is designed to help shorten the learning curve of inexperienced operators to ensure consistency and faster loading of material while reducing effort of the operator. Based on the speed of the machine, Load Assist automatically adjusts the cutting edge height to manage wheel slip and to ensure consistent and efficient loading in bulk earthmoving applications.
  • Machine Speed Limit 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 to high idle.
  • Sequence Assist (Optional) uses cylinder position sensors to automate bowl, apron and further implement controls throughout the four core work cycles: Dig, Haul, Unload and Return. When utilized this can reduce up to 14 individual operator commands per cycle. Sequence Assist simplifies control over the implements, reduces joystick usage, automatically controls cushion hitch, transmission hold and ejector.
  • 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.
  • Cat Grade Control (Optional) intelligently ensures the machine does not cut below grade in the cut area or over fill in the fill area – avoiding rework and moving unnecessary material.
  • The Payload Estimator will calculate the payload of the machine in tonnes or tons by measuring the bowl lift cylinder pressures at the beginning of the loaded haul segment. This feature works best when using Sequence Assist. Using Payload Estimator during testing has achieved better than 95% accuracy when compared to actual scale weights. The Payload Estimator feature comes automatically when a machine is ordered with Sequence Assist.
  • Load Assist (Optional) is designed to help shorten the learning curve of inexperienced operators to ensure consistency and faster loading of material while reducing effort of the operator. Based on the speed of the machine, Load Assist automatically adjusts the cutting edge height to manage wheel slip and to ensure consistent and efficient loading in bulk earthmoving applications.
  • Machine Speed Limit 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 to high idle.
  • Sequence Assist (Optional) uses cylinder position sensors to automate bowl, apron and further implement controls throughout the four core work cycles: Dig, Haul, Unload and Return. When utilized this can reduce up to 14 individual operator commands per cycle. Sequence Assist simplifies control over the implements, reduces joystick usage, automatically controls cushion hitch, transmission hold and ejector.
  • 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.
  • Cat Grade Control (Optional) intelligently ensures the machine does not cut below grade in the cut area or over fill in the fill area – avoiding rework and moving unnecessary material.

OPERATOR COMFORT AND CONTROL

  • K 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.
  • 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.
  • The K Series cab interior improves operator comfort and visibility. The overall interior is 21% larger than the G Series cab.
  • K 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.
  • 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.
  • The K Series cab interior improves operator comfort and visibility. The overall interior is 21% larger than the G Series cab.

BUILT-IN SAFETY FEATURES

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

SAVE ON MAINTENANCE TIME

  • The fuel, water and engine oil are relocated at ground level on the right hand side of the machine for easy access.
  • The fuel, water and engine oil are relocated at ground level on the right hand side of the machine for easy access.

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
    • Ground level engine shutdown
    • Radiator, aluminum unit core, 9 fins per inch
    • Guard, crankcase
    • 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, dry caliper, hydraulic actuated
  • 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)
    • 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
      • Diesel Particulate Filter (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 hooks, front
    • Vandalism locks
    • Heater, engine coolant 120V
    • Steering locks
  • 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
    • Guard, overflow
    • Wiring group
    • Push Pull
  • Service Instructions
    • Film arrangement – U.S. (ANSI)
    • Film arrangement – International (ISO)