631 - Tier 2

Open Bowl Scrapers 631 - Tier 2

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Key Specs

Flywheel Power - Tractor/Scraper: 570 hp; 425 kW

Scraper Capacity - Heaped: 34 yd³; 26 m³

Exterior Sound Level: The exterior sound power level for the standard machine (ISO 6393) is 116 dB(A).; The exterior sound power level for the standard machine (ISO 6393) is 116 dB(A).

631 - Tier 2
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Overview

Delivers results

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.

Benefits

Increased Comfort

Ergonomic controls and a newly redesigned cab interior provide a more comfortable and efficient working environment all day long

Improved Productivity

Improvements in fuel efficiency and the new APECS transmission controls deliver more productivity in most applications

Additional Safety

New safety features help operators be more productive and work more efficiently all day long

Features At A Glance

Be More Productive

Be More Productive

The Advanced Productivity Electronic Control System (APECS) allows
    the engine and transmission to communicate on a high level. This
    communication allows the machine to utilize better 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 allows the machine to maintain a
set top speed instead of relying on top gear selector.
Auto-Stall assists in quickly bringing the transmission to an
operating temperature at start-up when the machine is working in a cold climate region.
Cat® Payload for scrapers is an earthmoving solution for optimal payload and jobsite efficiency. Cat Payload achieves on-the-go weighing by using bowl lift cylinder pressure during the loaded haul segment. Cat Payload is optimized to be used with Sequence Assist, which provides increased productivity with less operator
effort.
Enhance productivity through the usage of Cat Payload with
Sequence Assist.

Work in Comfort

Work in Comfort

Reduce up to 14 individual operator commands per cycle with Sequence Assist.
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.

Designed for Safety

Enhance an operator’s awareness of site surroundings with the work area vision system (WAVS).
Get in and out of the cab easier with the new powered access ladder system (optional attachment).
Seat belt indicator provides visual and audible alerts when the seatbelt is not in use.
Advanced Cushion Hitch allows the cushion hitch to prevent endstroke by predicting endstroke events and managing the rate of dampening, resulting in reduced hitch maintenance and improved operator ride in rough conditions.
The fuel fill, fuel filter, engine oil filter, engine oil change, and water drain are easily accessible at ground level.

Easy to Operate

Easy to Operate

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.

Integrated Cat Technologies

Integrated Cat Technologies

Monitor, manage, and enhance jobsite operations.
Hit the target grade faster and more accurately with Cat Grade technologies. Finish jobs in fewer passes and with less operator effort, saving you time and helping to increase profit.
Product Link™ collects machine data that can be viewed online through web and mobile applications (optional attachment).
Access information anytime, anywhere with VisionLink® – use it to make informed decisions that boost productivity, lower costs, simplify maintenance, and improve safety and security on your
jobsite.
Shorten the learning curve for inexperienced operators with
Sequence Assist and Load Assist (included with Cat Grade
attachment).

Execute Efficiency

Execute Efficiency

The new tractor hydraulic on -demand fan helps assist in lower fuel consumption.
Using draft-arm overflow guards diverts material away from the bowl, preventing material from getting caught between the draft arms and the bowl sides.
Cat Grade (optional attachment) intelligently ensures the machine does not cut below grade in a cut area or overfill in the fill area.

Specifications Standard Equipment Optional Equipment

Product Specifications for 631 - Tier 2

Tractor Engine

Flywheel Power - Tractor/Scraper

570 hp 425 kW

Scraper Bowl

Scraper Capacity - Heaped

34 yd³ 26 m³

Cab

Exterior Sound Level	The exterior sound power level for the standard machine (ISO 6393) is 116 dB(A). The exterior sound power level for the standard machine (ISO 6393) is 116 dB(A).
ROPS/FOPS	ROPS/FOPS meet “ISO Standards.” ROPS/FOPS meet “ISO Standards.”

Safety Criteria Compliance Standards

Steering System	ISO 5010:2007 ISO 5010:2007
Falling Object Protective Structure (FOPS)	ISO 3449:2005 Level II ISO 3449:2005 Level II
Rollover Protection Structure (ROPS)	ISO 3471:2008 for up to 21 282 kg (46,919 lb) ISO 3471:2008 for up to 21 282 kg (46,919 lb)
Seat Belt	SAE J386:FEB2006 SAE J386:FEB2006
Reverse Alarm	ISO 9533:2010 ISO 9533:2010
Brakes	Brakes ISO 3450:2011 Brakes ISO 3450:2011

Transmission

Top Speed - Loaded

34.7 mile/h 55.8 km/h

Implement Cycle Times

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

Engine

Emissions	Cat® C18 engine meets U.S. EPA Tier 2/EU Stage II Equivalent emission standards. Cat® C18 engine meets U.S. EPA Tier 2/EU Stage II Equivalent emission standards.
Engine Model - Tractor	Cat® C18 Cat® C18
Rated Engine RPM - Tractor	1900 r/min 1900 r/min
Flywheel Power - Tractor	570 hp 425 kW

Travel Speeds - Runout

Transmission Gear - First	3.4 mile/h 5.5 km/h
Transmission Gear - Second	6.2 mile/h 10 km/h
Transmission Gear - Third	7.7 mile/h 12.4 km/h
Transmission Gear - Fourth	10.5 mile/h 16.9 km/h
Transmission Gear - Fifth	14.1 mile/h 22.7 km/h
Transmission Gear - Sixth	19 mile/h 30.6 km/h
Transmission Gear - Seventh	25.7 mile/h 41.4 km/h
Transmission Gear - Eighth	34.7 mile/h 55.8 km/h
Transmission Gear - Reverse	6.2 mile/h 9.9 km/h

General

Overall Width	12.93 ft 3.94 m
Overall Shipping Height	12.75 ft 3.89 m
Scraper Capacity - Struck	24 yd³ 18.3 m³
Scraper Capacity - Heaped	34 yd³ 26 m³
Rated Load	37 200 kg (82,200 lb); 37.2 tonnes (41.1 tons) 37 200 kg (82,200 lb); 37.2 tonnes (41.1 tons)
Width - Cut	11.50 ft 3.51 m
Maximum Depth of Cut	17.7 in 450 mm
Maximum Depth of Spread	21.1 in 535 mm
Top Speed - Loaded	34.7 mile/h 55.8 km/h
180° Curb-to-Curb Turning Width	40.12 ft 12.23 m
Tires - Tractor	37.25R35E3 37.25R35E3
Tires - Scraper	37.25R35E3 37.25R35E3
Fuel Tank Refill Capacity - Scraper	231 gal (US) 874 l

Push-Pull

Overall Length - With Bail Down	54.59 ft 16.64 m
Operating Weight - Empty	106430 lb 48275 kg

Service Refill Capacities

Real Wheels (Each)	2.37 gal (US) 9 l
Crankcase - Tractor	13.7 gal (US) 52 l
Transmission System	29 gal (US) 110 l
Cooling System	18.75 gal (US) 71 l
Fuel Tank	231 gal (US) 874 l
Hydraulic System	37.5 gal (US) 142 l
Diesel Exhaust Fluid (DEF)	8 gal(US)/d 30.5 l

Service Refill Capacities - Tractor

Windshield Washer Reservoir	1.3 gal (US) 5 l
Differential	40.41 gal (US) 153 l

Service Refill Capacities - Scraper

Final Drive - Each

8.71 gal (US) 33 l

Dimensions

Width - Overall Machine	155 in 3937 mm
Width - Overall Machine - Ladder Down	159.3 in 4045 mm
Width - Tractor	144.2 in 3662 mm
Width - Rear Tire Centers	96.9 in 2462 mm
Width - Inside of Bowl	134 in 3404 mm
Width - Outside Bowl - Shipping Width	143.1 in 3635 mm
Height - Overall Shipping	153.2 in 3892 mm
Height - Top of Cab	149.8 in 3805 mm
Front of Tractor to Front Axle	142 in 3608 mm
Ground Clearance - Tractor	26.1 in 664 mm
Axle to Vertical Hitch Pin	20 in 509 mm
Height - Scraper Blade Maximum	20 in 510 mm
Wheel Base	346.8 in 8808 mm
Length - Overall Machine - Standard	597 in 15164 mm
Length - Maximum (Push-Pull)	655.1 in 16640 mm
Rear Axle - Rear of Machine	108 in 2744 mm
Width - Outside Rear Tires	143.2 in 3636 mm

Non Push-Pull

Operating Weight - Empty	102750 lb 46600 kg
Overall Length	49.34 ft 15.04 m

631 - Tier 2 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

Muffler

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, 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
- Fuel level
- Park brake
- Implement lockout
- Brake system
- 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

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)

631 - Tier 2 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

Year of manufacture plate

SERVICE INSTRUCTIONS

Film arrangement – International (ISO)

Product Specifications for 631 - Tier 2

Download Print

Tractor Engine

Flywheel Power - Tractor/Scraper

570 hp 425 kW

Scraper Bowl

Scraper Capacity - Heaped

34 yd³ 26 m³

Cab

Exterior Sound Level	The exterior sound power level for the standard machine (ISO 6393) is 116 dB(A). The exterior sound power level for the standard machine (ISO 6393) is 116 dB(A).
ROPS/FOPS	ROPS/FOPS meet “ISO Standards.” ROPS/FOPS meet “ISO Standards.”

Safety Criteria Compliance Standards

Steering System	ISO 5010:2007 ISO 5010:2007
Falling Object Protective Structure (FOPS)	ISO 3449:2005 Level II ISO 3449:2005 Level II
Rollover Protection Structure (ROPS)	ISO 3471:2008 for up to 21 282 kg (46,919 lb) ISO 3471:2008 for up to 21 282 kg (46,919 lb)
Seat Belt	SAE J386:FEB2006 SAE J386:FEB2006
Reverse Alarm	ISO 9533:2010 ISO 9533:2010
Brakes	Brakes ISO 3450:2011 Brakes ISO 3450:2011

Transmission

Top Speed - Loaded

34.7 mile/h 55.8 km/h

Implement Cycle Times

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

Engine

Emissions	Cat® C18 engine meets U.S. EPA Tier 2/EU Stage II Equivalent emission standards. Cat® C18 engine meets U.S. EPA Tier 2/EU Stage II Equivalent emission standards.
Engine Model - Tractor	Cat® C18 Cat® C18
Rated Engine RPM - Tractor	1900 r/min 1900 r/min
Flywheel Power - Tractor	570 hp 425 kW

Travel Speeds - Runout

Transmission Gear - First	3.4 mile/h 5.5 km/h
Transmission Gear - Second	6.2 mile/h 10 km/h
Transmission Gear - Third	7.7 mile/h 12.4 km/h
Transmission Gear - Fourth	10.5 mile/h 16.9 km/h
Transmission Gear - Fifth	14.1 mile/h 22.7 km/h
Transmission Gear - Sixth	19 mile/h 30.6 km/h
Transmission Gear - Seventh	25.7 mile/h 41.4 km/h
Transmission Gear - Eighth	34.7 mile/h 55.8 km/h
Transmission Gear - Reverse	6.2 mile/h 9.9 km/h

General

Overall Width	12.93 ft 3.94 m
Overall Shipping Height	12.75 ft 3.89 m
Scraper Capacity - Struck	24 yd³ 18.3 m³
Scraper Capacity - Heaped	34 yd³ 26 m³
Rated Load	37 200 kg (82,200 lb); 37.2 tonnes (41.1 tons) 37 200 kg (82,200 lb); 37.2 tonnes (41.1 tons)
Width - Cut	11.50 ft 3.51 m
Maximum Depth of Cut	17.7 in 450 mm
Maximum Depth of Spread	21.1 in 535 mm
Top Speed - Loaded	34.7 mile/h 55.8 km/h
180° Curb-to-Curb Turning Width	40.12 ft 12.23 m
Tires - Tractor	37.25R35E3 37.25R35E3
Tires - Scraper	37.25R35E3 37.25R35E3
Fuel Tank Refill Capacity - Scraper	231 gal (US) 874 l

Push-Pull

Overall Length - With Bail Down	54.59 ft 16.64 m
Operating Weight - Empty	106430 lb 48275 kg

Service Refill Capacities

Real Wheels (Each)	2.37 gal (US) 9 l
Crankcase - Tractor	13.7 gal (US) 52 l
Transmission System	29 gal (US) 110 l
Cooling System	18.75 gal (US) 71 l
Fuel Tank	231 gal (US) 874 l
Hydraulic System	37.5 gal (US) 142 l
Diesel Exhaust Fluid (DEF)	8 gal(US)/d 30.5 l

Service Refill Capacities - Tractor

Windshield Washer Reservoir	1.3 gal (US) 5 l
Differential	40.41 gal (US) 153 l

Service Refill Capacities - Scraper

Final Drive - Each

8.71 gal (US) 33 l

Dimensions

Width - Overall Machine	155 in 3937 mm
Width - Overall Machine - Ladder Down	159.3 in 4045 mm
Width - Tractor	144.2 in 3662 mm
Width - Rear Tire Centers	96.9 in 2462 mm
Width - Inside of Bowl	134 in 3404 mm
Width - Outside Bowl - Shipping Width	143.1 in 3635 mm
Height - Overall Shipping	153.2 in 3892 mm
Height - Top of Cab	149.8 in 3805 mm
Front of Tractor to Front Axle	142 in 3608 mm
Ground Clearance - Tractor	26.1 in 664 mm
Axle to Vertical Hitch Pin	20 in 509 mm
Height - Scraper Blade Maximum	20 in 510 mm
Wheel Base	346.8 in 8808 mm
Length - Overall Machine - Standard	597 in 15164 mm
Length - Maximum (Push-Pull)	655.1 in 16640 mm
Rear Axle - Rear of Machine	108 in 2744 mm
Width - Outside Rear Tires	143.2 in 3636 mm

Non Push-Pull

Operating Weight - Empty	102750 lb 46600 kg
Overall Length	49.34 ft 15.04 m

631 - Tier 2 Standard Equipment

Print

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

Muffler

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, 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
- Fuel level
- Park brake
- Implement lockout
- Brake system
- 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

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)

631 - Tier 2 Optional Equipment

Print

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

Year of manufacture plate

SERVICE INSTRUCTIONS

Film arrangement – International (ISO)

See how 631 - Tier 2 compares against frequently compared products.

Wheel Tractor-Scrapers

Selected

631 - Tier 2

631 - Tier 2

Flywheel Power - Tractor/Scraper: 570 hp; 425 kW
Scraper Capacity - Heaped: 34 yd³; 26 m³
Exterior Sound Level: The exterior sound power level for the standard machine (ISO 6393) is 116 dB(A).; The exterior sound power level for the standard machine (ISO 6393) is 116 dB(A).

Wheel Tractor-Scrapers

631

631

Flywheel Power - Tractor/Scraper: 570 hp; 425 kW
Scraper Capacity - Heaped: 34 yd³; 26 m³
Top Speed - Loaded: 34.7 mile/h; 55.8 km/h

View Details

Wheel Tractor-Scrapers

637

637

Flywheel Power - Tractor/Scraper: 570 hp; 425 kW
Scraper Capacity - Heaped: 34 yd³; 26 m³
Top Speed - Loaded: 34.7 mile/h; 55.8 km/h

View Details

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631 Open Bowl Scraper

631 Open Bowl Scraper

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631 Open Bowl Scraper

631 Open Bowl Scraper

631 Open Bowl Scraper

631 Open Bowl Scraper

631 Open Bowl Scraper

631 Open Bowl Scraper

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