637KNon-Current
637K Coal - 2016, Tier 4 Final, Stage IV
Overview
637K coal bowls are longer and higher than standard wheel tractor scraper bowls, allowing them to haul 38 m (50 yd) of low density loose coal. The bowls are designed and built to specifically deliver in coming loose coal to the stock pile and reserve stock piled coal to the feeder system.
Specifications
Units:
| Flywheel Power - Tractor/Scraper | 425 kW (570 hp)/216 kW (290 hp) |
| Scraper Capacity - Heaped | — |
| Top Speed - Loaded | — |
Benefits & Features
MAXIMIZE PERFORMANCE
- Coal Bowls are longer and higher than standard scraper bowls, which allows Wheel Tractor-Scrapers to haul 38 m (50 yd) of low density loose coal. The bowls are designed and built to specifically deliver in coming loose coal to the stock pile and reserve stock piled coal to the feeder system.
- 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.
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.
- In cold weather conditions the machine will use the Auto Stall feature to help warm up the transmission oil faster resulting in the machine shifting out of torque converter drive (2nd gear) faster than on previous models.
BUILT-IN SAFETY FEATURES
- Brakes have been changed from an air actuated drum shoe brake to a hydraulic actuated tractor wet disc brake and a scraper dry caliper.
- Tire Spin Reduction allows the machine to control the slip of the tractor tires only. When Tire Spin Reduction is selected the machine will control wheel spin on the tractor by keeping the slip in the optimal range for loading by adjusting engine rpms with no additional operator input.
- Engine Over Speed Protection - 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.
- Coal bowl scrapers are effective in compacting coal, which reduces the risk of spontaneous combustion of coal in the stockpile by eliminating the air spaces.
February 3, 2026
Specifications
Units:
| Flywheel Power - Tractor/Scraper | 425 kW (570 hp)/216 kW (290 hp) |
| Scraper Capacity - Heaped | — |
| Top Speed - Loaded | — |
| Brakes | ISO 3450:2011 |
| Steering System | ISO 5010:2007 |
| Seat Belt | SAE J386:FEB2006 |
| 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) |
| 180° Curb-to-Curb Turning Width | — |
| Flywheel Power - Tractor | — |
| Tires - Tractor | 37.25R35**E3 |
| Overall Width | — |
| Rated Engine RPM - Scraper | — |
| Rated Engine RPM - Tractor | — |
| Operating Weight - Empty | — |
| Scraper Capacity - Heaped | — |
| Width - Cut | — |
| Top Speed - Loaded | — |
| Overall Length | — |
| Fuel Tank Refill Capacity - Scraper | — |
| Scraper Capacity - Struck | — |
| Overall Shipping Height | — |
| Maximum Depth of Cut | — |
| Emissions | Cat C9.3 and Cat C18 engines meet U.S. EPA Tier 4 Final/EU Stage IV engine emission standards. |
| Maximum Depth of Spread | — |
| Flywheel Power - Scraper | — |
| Rated Load | 34 472 kg (76,000 lb)/34.20 tonnes (38 tons) |
| Engine Model - Scraper | Cat C9.3 |
| Engine Model - Tractor | Cat C18 |
| Tires - Scraper | 37.25R35**E3 |
| Cooling System - Scraper | — |
| Diesel Exhaust Fluid - Scraper | — |
| Transmission System - Tractor | — |
| Crankcase - Tractor | — |
| Diesel Exhaust Fluid - Tractor | — |
| Fuel Tank | — |
| Transmission System - Scraper | — |
| Hydraulic System | — |
| Cooling System - Tractor | — |
| Crankcase - Scraper | — |
| Transmission Gear - Eighth | — |
| Transmission Gear - First | — |
| Transmission Gear - Fourth | — |
| Transmission Gear - Reverse | — |
| Transmission Gear - Third | — |
| Transmission Gear - Seventh | — |
| Transmission Gear - Fifth | — |
| Transmission Gear - Sixth | — |
| Transmission Gear - Second | — |
| Bail Raise | — |
| Bowl Lower | — |
| Apron Lower | — |
| Ejector Retract | — |
| Bail Lower | — |
| Apron Raise | — |
| Ejector Extend | — |
| Bowl Raise | — |
| Width - Overall Machine | — |
| Width - Tractor | — |
| Ground Clearance - Tractor | — |
| Axle to Vertical Hitch Pin | — |
| Height - Top of Cab | — |
| Width - Outside Rear Tires | — |
| Height - Scraper Blade Maximum | — |
| Rear Axle - Rear of Machine | — |
| Width - Rear Tire Centers | — |
| Front of Tractor to Front Axle | — |
| Width - Inside of Bowl | — |
| Length - Overall Machine - Standard | — |
| Height - Overall Shipping | — |
| Wheel Base | — |
| ROPS/FOPS | Meet ISO standards |
| Exterior Sound Power Level | The exterior sound power level for the standard machine (ISO 6393:2008) is 118 dB(A). |
Benefits & Features
MAXIMIZE PERFORMANCE
- Coal Bowls are longer and higher than standard scraper bowls, which allows Wheel Tractor-Scrapers to haul 38 m (50 yd) of low density loose coal. The bowls are designed and built to specifically deliver in coming loose coal to the stock pile and reserve stock piled coal to the feeder system.
- 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.
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.
- In cold weather conditions the machine will use the Auto Stall feature to help warm up the transmission oil faster resulting in the machine shifting out of torque converter drive (2nd gear) faster than on previous models.
BUILT-IN SAFETY FEATURES
- Brakes have been changed from an air actuated drum shoe brake to a hydraulic actuated tractor wet disc brake and a scraper dry caliper.
- Tire Spin Reduction allows the machine to control the slip of the tractor tires only. When Tire Spin Reduction is selected the machine will control wheel spin on the tractor by keeping the slip in the optimal range for loading by adjusting engine rpms with no additional operator input.
- Engine Over Speed Protection - 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.
- Coal bowl scrapers are effective in compacting coal, which reduces the risk of spontaneous combustion of coal in the stockpile by eliminating the air spaces.
OPERATOR COMFORT AND CONTROL
- 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 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.
EFFICIENCY THROUGH TECHNOLOGY
- Machine Speed Limitis 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.
- 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. In most cases, allowing the engine and transmission to select the correct gear to pull the load will result in a lower engine load factor and lower fuel burn verses top gear selection.
- 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, allowing the machine to utilize the more efficient tractor power train vs. the full time torque convertor drive scraper power train.
Data not available.
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:<ul><li>Primary and secondary, wet disc, hydraulic actuated</li><li>Parking, hydraulic-released, spring-applied</li></ul>
- Throttle lock
- Transmission:<ul><li>8-speed planetary power shift</li><li>ECPC control</li><li>APECS software</li><li>Programmable top gear selection</li><li>Transmission hold</li><li>Differential lock</li><li>Guard, power train</li><li>Standard tire spin reduction</li><li>Ground speed control</li><li>Machine speed limit</li><li>Differential lock protection</li></ul>
- POWER TRAIN – SCRAPER
- Cat C9.3 engine<ul><li>High pressure common rail fuel</li><li>Constant lift engine brake</li></ul>
- 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:<ul><li>Primary and secondary, dry caliper, hydraulic actuated</li></ul>
- Transmission:<ul><li>4-speed (torque converter drive)</li><li>Planetary power shift</li></ul>
- ELECTRICAL – TRACTOR
- Alternator, 150 Amp
- Batteries (4), 12V, 1,000 CCA, maintenance free, high output
- Electrical system, 24V
- Lighting system:<ul><li>Headlights, LED</li><li>Turn signals with hazard function, LED floodlights, (2) cutting edge (1) bowl, halogen side vision (2)</li></ul>
- Starting/charging receptacle
- ELECTRICAL – SCRAPER
- Alarm, backup
- Batteries (4) 12V, 1,000 CAA, maintenance free, high output
- Alternator, 65 Amp
- Electrical system, 24V
- Lighting system:<ul><li>Brake lights, LED</li><li>Turn signals with hazard function, LED</li></ul>
- 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:<ul><li>Throttle lock</li><li>Wipers/washers</li><li>Hazard lights</li><li>Retarding level select</li><li>Work lights on, off</li><li>Information mode on Messenger Display</li></ul>
- 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:<ul><li>Coolant temperature</li><li>Engine oil temperature</li><li>Hydraulic oil temperature</li><li>Fuel level</li><li>Park brake</li><li>Implement lockout</li><li>Brake system</li><li>Throttle lock</li><li>System voltage</li><li>Secondary steering</li><li>Bail down</li><li>Ejector auto</li><li>Differential lock</li><li>Apron float</li><li>Transmission hold</li><li>Cushion hitch</li><li>High beam lights</li><li>Action lamp</li><li>Engine speed, rpm</li><li>Gear selection</li></ul>
- 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
- Coal Bowl<ul><li>31 m3 (41 yd3), struck</li><li>38 m3 (50 yd3), heaped</li></ul>
- Vandalism locks
- Scraper fenders
- Fast oil change
- 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
- Advanced Tire Spin Reduction
- OTHER ATTACHMENTS
- Camera arrangement – WAVS
- Cab beacon
- Air horn
- Air horn and beacon
- Wiring group
- SERVICE INSTRUCTIONS
- Film arrangement – U.S. (ANSI)
- Film arrangement – International (ISO)