Tractor Engine
| Flywheel Power - Tractor/Scraper | 570 hp 425 kW |
Account
If you already have an existing account with another Cat App, you can use the same account to sign in here
One Account. All of Cat.
Your Caterpillar account is the single account you use to log in to select services and applications we offer. Shop for parts and machines online, manage your fleet, go mobile, and more.
Welcome Back!
My Account Dashboard
Account Information
Site Settings
Security
Open Bowl Scrapers 637
Request A Price Find DealerKey Specs
- 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
Overview
High performance
Cat’s 637 Wheel Tractor-Scraper is engineered to conquer challenges operators face worldwide. With its strength and durability, it works in some of the most difficult conditions and materials one can find.
Benefits
Increased Comfort
Ergonomic controls and a newly redesigned cab interior provide a more comfortable and efficient working environment all day long
Up To 12% More 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
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 a 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 job site 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.
Work in Comfort
• 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.
Designed for Safety
• 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.
Easy to Operate
• The spacious cab features easy, intuitive controls and excellentvisibility. 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
• Monitor, manage, and enhance job site operations.• Hit 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 the safety and security of your job site.
• Shorten the learning curve for inexperienced operators with load
assist (optional attachment).
Execute Efficiency
• The new tractor hydraulic on-demand fan helps assist in lowering 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 Control (optional attachment) intelligently ensures the
machine does not cut below grade in a cut area or overfill in the
fill area.
Product Specifications for 637
Scraper Bowl
| Scraper Capacity - Heaped | 34 yd³ 26 m³ |
Transmission
| Top Speed - Loaded | 34.7 mile/h 55.8 km/h |
Dimensions
| Front of Tractor to Front Axle | 142.2 in 3612 mm |
| Axle to Vertical Hitch Pin | 20 in 509 mm |
| Wheel Base | 346.8 in 8808 mm |
| Rear Axle - Rear of Machine | 90.2 in 2292 mm |
| Width - Rear Tire Centers | 96.9 in 2462 mm |
| Width - Inside of Bowl | 134 in 3404 mm |
| Height - Scraper Blade Maximum | 20 in 510 mm |
| Extended Push Block (Push-Pull) | 108 in 2744 mm |
| Width - Outside Rear Tires | 143.2 in 3636 mm |
| Length - Maximum (Push-Pull) | 655.1 in 16640 mm |
| Width - Overall Machine | 155 in 3937 mm |
| Width - Tractor | 137.8 in 3499 mm |
| Length - Overall Machine - Standard | 597 in 15164 mm |
| Height - Top of Cab | 147 in 3733 mm |
| Ground Clearance - Tractor | 26.1 in 664 mm |
| Height - Overall Shipping | 163.2 in 4145 mm |
General
| Top Speed - Loaded | 34.7 mile/h 55.8 km/h |
| 180° Curb-to-Curb Turning Width | 40.12 ft 12.23 m |
| Scraper Capacity - Heaped | 34 yd³ 26 m³ |
| Overall Width | 12.93 ft 3.94 m |
| Maximum Depth of Spread | 21.1 in 535 mm |
| Maximum Depth of Cut | 17.7 in 450 mm |
| Width - Cut | 11.50 ft 3.51 m |
| Tires - Tractor | 37.25R35**E3 37.25R35**E3 |
| Tires - Scraper | 37.25R35**E3 37.25R35**E3 |
| Overall Shipping Height | 13.62 ft 4.15 m |
| Fuel Tank Refill Capacity - Scraper | 370 gal (US) 1400 l |
| Scraper Capacity - Struck | 24 yd³ 18.3 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) |
Engine
| Emissions | Cat C9.3 and C18 engines meet U.S. EPA Tier 2/EU Stage II Equivalent emission standards. Cat C9.3 and C18 engines meet U.S. EPA Tier 2/EU Stage II Equivalent emission standards. |
| Flywheel Power - Tractor | 570 hp 425 kW |
| Rated Engine RPM - Tractor | 1900 r/min 1900 r/min |
| Engine Model - Scraper | Cat C9.3 ACERT Cat C9.3 ACERT |
| Rated Engine RPM - Scraper | 2150 r/min 2150 r/min |
| Flywheel Power - Scraper | 290 hp 216 kW |
| Engine Model - Tractor | Cat C18 Cat C18 |
Service Refill Capacities
| Crankcase - Scraper | 6.5 gal (US) 24.5 l |
| Transmission System - Scraper | 12.9 gal (US) 49 l |
| Crankcase - Tractor | 13.7 gal (US) 52 l |
| Transmission System - Tractor | 29 gal (US) 110 l |
| Hydraulic System | 37.5 gal (US) 142 l |
| Cooling System - Tractor | 19.8 gal (US) 75 l |
| Fuel Tank | 370 gal (US) 1400 l |
| Cooling System - Scraper | 16.1 gal (US) 61 l |
Non Push-Pull
| Overall Length | 49.34 ft 15.04 m |
| Operating Weight - Empty | 114950 lb 52140 kg |
Push-Pull
| Operating Weight - Empty | 119060 lb 54005 kg |
| Overall Length - With Bail Down | 54.59 ft 16.64 m |
Cab
| ROPS/FOPS | ROPS/FOPS meet “ISO Standards.” ROPS/FOPS meet “ISO Standards.” |
| 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). |
Safety Criteria Compliance Standards
| 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) |
| Falling Object Protective Structure (FOPS) | ISO 3449:2005 Level II ISO 3449:2005 Level II |
| Brakes | ISO 3450:2011 ISO 3450:2011 |
| Reverse Alarm | ISO 9533:2010 ISO 9533:2010 |
| Seat Belt | SAE J386:FEB2006 SAE J386:FEB2006 |
| Steering System | ISO 5010:2007 ISO 5010:2007 |
Travel Speeds - Runout
| Transmission Gear - Reverse | 6.2 mile/h 9.9 km/h |
| Transmission Gear - Seventh | 25.7 mile/h 41.95 km/h |
| Transmission Gear - First | 3.4 mile/h 5.5 km/h |
| Transmission Gear - Third | 7.7 mile/h 12.4 km/h |
| Transmission Gear - Eighth | 34.7 mile/h 55.8 km/h |
| Transmission Gear - Second | 6.2 mile/h 10 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 |
Implement Cycle Times
| Ejector Retract | 8.5 s 8.5 s |
| Bowl Lower | 3.5 s 3.5 s |
| Bail Raise | 1.5 s 1.5 s |
| Apron Lower | 3.8 s 3.8 s |
| Bail Lower | 2.1 s 2.1 s |
| Ejector Extend | 8.5 s 8.5 s |
| Apron Raise | 4 s 4 s |
| Bowl Raise | 3.5 s 3.5 s |
637 Standard Equipment
NOTE
- Standard and optional equipment may vary. Consult your Cat dealer for details.
POWER TRAIN – TRACTOR
- Cat C18 engine with MEUI™
- 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 actuated
- 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
- Cat C9.3 engine:
- High pressure common rail fuel
- Constant lift engine brake
- Electric start, 24V
- Air cleaner, dry type with precleaner
- Fan, mechanical driven
- Ground level engine shutdown
- Radiator, aluminum unit core, 9 fins per inch
- Starting aid, either
- Braking system:
- Primary and secondary, dry caliper, hydraulic actuated
- Transmission:
- 4-speed (torque converter drive)
- Planetary power shift
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
- Batteries (4) 12V, 1,000 CCA, maintenance free, high output
- Alternator, 65 Amp
- Electrical system, 24V
- 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
- Scraper fenders
- Overflow guard
- Fast oil change
- Rims (2)
- Hydraulic position sensing cylinders (bowl lift and apron)
637 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
- Wiring group
- Push Pull
- Year of manufacture plate
SERVICE INSTRUCTIONS
- Film arrangement – International (ISO)
See how 637 compares against frequently compared products.
Wheel Tractor-Scrapers
637
Selected
- 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
Wheel Tractor-Scrapers
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
Wheel Tractor-Scrapers
651
- Tractor Engine
- Cat C18
- Cat C18
- Flywheel Power - Tractor/Scraper
- 469kW (629 hp)
- 469kW (629 hp)
- Scraper Capacity - Heaped
- 44 yd³
- 33.6 m³
assignment Product Brochures and More Are Ready to Download!
Caterpillar product brochures and other informational documents are available for your growing business.
Media Gallery
Photos
Videos
360 View
637 Open Bowl Scraper
Wheel Tractor-Scraper K Series
Wheel Tractor-Scraper K Series Operator Testimonial
Wheel Tractor Scraper CAT® 631K C202
