637K - Tier 2

Open Bowl Scrapers 637K - Tier 2

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Key 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

637K - Tier 2
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Overview

High performance

Cat’s 637K 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

EFFICIENCY THROUGH TECHNOLOGY

EFFICIENCY THROUGH TECHNOLOGY

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.
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.
Fuel Economy Mode is a two part feature when selected. The first part of the feature lowers the transmission shift points allowing shifting to take place at lower rpms to aid in fuel savings. The second part of the Fuel Economy Mode allows the machine when operated at engine rpms less than full throttle to automatically vary the power distribution between the tractor and the scraper.
The Payload Estimator (optional) 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.
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.
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.
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.

OPERATOR COMFORT AND CONTROL

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

BUILT-IN SAFETY FEATURES

BUILT-IN SAFETY FEATURES

Tire Spin Reduction feature will allow the machine to control the slip of the tractor tires only.
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 allows the machine to prevent the operator from engaging the differential lock when damage could occur.

SAVE ON MAINTENANCE TIME

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.

Full Specifications Standard Equipment Optional Equipment

Product Specifications for 637K - Tier 2

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General

Fuel Tank Refill Capacity - Scraper	370 gal (US) 1400 l
Top Speed - Loaded	34.7 mile/h 55.8 km/h
Overall Shipping Height	13.62 ft 4.15 m
180° Curb-to-Curb Turning Width	40.12 ft 12.23 m
Maximum Depth of Spread	21.1 in 535 mm
Scraper Capacity - Heaped	34 yd³ 26 m³
Scraper Capacity - Struck	24 yd³ 18.3 m³
Maximum Depth of Cut	17.7 in 450 mm
Overall Width	12.93 ft 3.94 m
Tires - Tractor	37.25R35E3 37.25R35E3
Width - Cut	11.5 ft 3.51 m
Tires - Scraper	37.25R35E3 37.25R35E3
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

Flywheel Power - Tractor	570 HP 425 kW
Rated Engine RPM - Scraper	2150 r/min 2150 r/min
Rated Engine RPM - Tractor	1900 r/min 1900 r/min
Flywheel Power - Scraper	290 HP 216 kW
Engine Model - Scraper	Cat C9.3 ACERT Cat C9.3 ACERT
Engine Model - Tractor	Cat C18 Cat C18
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.

Tractor Engine

Flywheel Power - Tractor/Scraper

570 HP 425 kW

Scraper Bowl

Scraper Capacity - Heaped

34 yd³ 26 m³

Transmission

Top Speed - Loaded

34.7 mile/h 55.8 km/h

Service Refill Capacities

Transmission System - Tractor	29 gal (US) 110 l
Transmission System - Scraper	12.9 gal (US) 49 l
Cooling System - Tractor	19.8 gal (US) 75 l
Hydraulic System	37.5 gal (US) 142 l
Cooling System - Scraper	16.1 gal (US) 61 l
Crankcase - Tractor	13.7 gal (US) 52 l
Crankcase - Scraper	6.5 gal (US) 24.5 l
Fuel Tank	370 gal (US) 1400 l

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 - Overall Machine	155 in 3937 mm
Extended Push Block (Push-Pull)	108 in 2744 mm
Width - Rear Tire Centers	96.9 in 2462 mm
Height - Overall Shipping	163.2 in 4145 mm
Width - Inside of Bowl	134 in 3404 mm
Height - Top of Cab	147 in 3733 mm
Width - Tractor	137.8 in 3499 mm
Length - Maximum (Push-Pull)	655.1 in 16640 mm
Height - Scraper Blade Maximum	20 in 510 mm
Length - Overall Machine - Standard	597 in 15164 mm
Width - Outside Rear Tires	143.2 in 3636 mm
Ground Clearance - Tractor	26.1 in 664 mm

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

Seat Belt	SAE J386:FEB2006 SAE J386:FEB2006
Steering System	ISO 5010:2007 ISO 5010:2007
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

Travel Speeds - Runout

Transmission Gear - Third	7.7 mile/h 12.4 km/h
Transmission Gear - Seventh	25.7 mile/h 41.95 km/h
Transmission Gear - Second	6.2 mile/h 10 km/h
Transmission Gear - First	3.4 mile/h 5.5 km/h
Transmission Gear - Sixth	19 mile/h 30.6 km/h
Transmission Gear - Fifth	14.1 mile/h 22.7 km/h
Transmission Gear - Reverse	6.2 mile/h 9.9 km/h
Transmission Gear - Fourth	10.5 mile/h 16.9 km/h
Transmission Gear - Eighth	34.7 mile/h 55.8 km/h

Implement Cycle Times

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

637K - Tier 2 Standard Equipment

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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)

637K - 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

Wiring group

Push Pull

Year of manufacture plate

SERVICE INSTRUCTIONS

Film arrangement – International (ISO)

Compatible Technology and Services

Leverage Caterpillar connected data and security principles to improve efficiencies, increase productivity and make your business more profitable.

Assist

Equipment Management

Grade

Payload

Productivity

Cat Load Assist for Wheel Tractor-Scrapers

Cat® Load Assist for Wheel Tractor-Scrapers automates bowl loading with the push of a button. As the machine approaches the cut, the operator activates Load Assist to automate the cutting-edge height.

Explore Technology
Cat Sequence Assist for Wheel Tractor-Scrapers

Cat® Sequence Assist for Wheel Tractor-Scrapers uses integrated software to automate repetitive tasks an operator performs when loading, hauling, and dumping. Reduce operator fatigue and rework caused from working manually.

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Cat® Load Assist for Wheel Tractor-Scrapers automates bowl loading with the push of a button. As the machine approaches the cut, the operator activates Load Assist to automate the cutting-edge height.

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Cat® Sequence Assist for Wheel Tractor-Scrapers uses integrated software to automate repetitive tasks an operator performs when loading, hauling, and dumping. Reduce operator fatigue and rework caused from working manually.

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Cat Inspect

Cat® Inspect allows you to access your equipment data on your mobile device. This easy-to-use app lets you capture inspection data and integrates with your other Cat data systems, so you can keep a close eye on your fleet. More than one million inspections are completed each year, providing convenience and accountability to equipment owners.

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Cat Product Link

Cat® Product Link™ wirelessly connects you to your equipment giving you valuable insight into how your machine or fleet is performing. Information such as location, hours, fuel usage, productivity, idle time, and diagnostic codes are made available through online web applications so that you can make timely, fact-based decisions to maximize efficiency, improve productivity, and lower the cost of owning and operating your fleet. Available with satellite or cellular connectivity.

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VisionLink®

VisionLink® is a cloud-based software application that takes the guesswork out of fleet management with key insights to maximize performance - regardless of fleet size or equipment manufacturer. Receive equipment data seamlessly to your desktop or mobile device, all from a convenient centralized solution to make informed decisions at every turn.

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Cat® Inspect allows you to access your equipment data on your mobile device. This easy-to-use app lets you capture inspection data and integrates with your other Cat data systems, so you can keep a close eye on your fleet. More than one million inspections are completed each year, providing convenience and accountability to equipment owners.

Explore Technology

Cat® Product Link™ wirelessly connects you to your equipment giving you valuable insight into how your machine or fleet is performing. Information such as location, hours, fuel usage, productivity, idle time, and diagnostic codes are made available through online web applications so that you can make timely, fact-based decisions to maximize efficiency, improve productivity, and lower the cost of owning and operating your fleet. Available with satellite or cellular connectivity.

Explore Technology

VisionLink® is a cloud-based software application that takes the guesswork out of fleet management with key insights to maximize performance - regardless of fleet size or equipment manufacturer. Receive equipment data seamlessly to your desktop or mobile device, all from a convenient centralized solution to make informed decisions at every turn.

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Cat Grade Control for Wheel Tractor-Scrapers

Cat® Grade Control for Wheel Tractor-Scrapers is a factory-integrated machine control and guidance system designed to help you move material correctly the first time.

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Cat® Grade Control for Wheel Tractor-Scrapers is a factory-integrated machine control and guidance system designed to help you move material correctly the first time.

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Cat Payload Estimator for Scrapers

Cat® Payload Estimator for Scrapers uses bowl lift cylinder pressure from the end of the cut to calculate payload. Payload Estimator is optimized with Sequence Assist, which helps to increase productivity with less operator effort.

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Cat® Payload Estimator for Scrapers uses bowl lift cylinder pressure from the end of the cut to calculate payload. Payload Estimator is optimized with Sequence Assist, which helps to increase productivity with less operator effort.

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VisionLink® Productivity

VisionLink® Productivity is an easy-to-use cloud-based platform that gathers and summarizes machine telematics and jobsite data from all your equipment. Actionable performance data is transmitted to the web platform for users to access anywhere, anytime via a mobile, tablet, or desktop device - on or off the jobsite.

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VisionLink® Productivity is an easy-to-use cloud-based platform that gathers and summarizes machine telematics and jobsite data from all your equipment. Actionable performance data is transmitted to the web platform for users to access anywhere, anytime via a mobile, tablet, or desktop device - on or off the jobsite.

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See how 637K - Tier 2 compares against frequently compared products.

Wheel Tractor-Scrapers 637K - Tier 2

637K - Tier 2

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

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Wheel Tractor-Scrapers 631K - Tier 2

631K - Tier 2

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

Model Details

Wheel Tractor-Scrapers 657

657

Tractor Engine: Cat C18; Cat C18
Flywheel Power - Tractor/Scraper: 469kW (629 hp) / 353 kW (473 hp); 469kW (629 hp) / 353 kW (473 hp)
Scraper Engine: Cat C15; Cat C15

Model Details

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