637K Wheel Tractor-Scraper

US
Metric

Overview

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. Built with twin engines, the 637K has high rolling resistance and additional power for loading, traveling up grades, and over fill areas—ultimately creating faster cycle times.

Tractor Engine

Flywheel Power - Tractor/Scraper
570.00 HP
425.00 kW

Scraper Bowl

Scraper Capacity: Heaped
34.00 yd3
26.00 m3

Transmission

Top Speed (Loaded)
34.70 mph
55.80 km/h

Engine

Engine Model - Scraper
Cat C9.3 ACERT
Engine Model - Tractor
Cat C18
Flywheel Power - Scraper
290.00 HP
216.00 kW
Flywheel Power: Tractor
570.00 hp
425.00 kW
Emissions
Cat C9.3 ACERT and C18 ACERT engines meet U.S. EPA Tier 2/EU Stage II Equivalent emission standards.
Rated Engine RPM - Scraper
2150.00 r/min
2150.00 r/min
Rated Engine RPM - Tractor
1900.00 r/min
1900.00 r/min

Dimensions

Width – Overall Machine
155.00 in
3937.00 mm
Width – Tractor
137.80 in
3499.00 mm
Width – Inside of Bowl
134.00 in
3404.00 mm
Width – Outside Rear Tires
143.20 in
3636.00 mm
Height – Overall Shipping
163.20 in
4145.00 mm
Height – Top of Cab
147.00 in
3733.00 mm
Ground Clearance – Tractor
26.10 in
664.00 mm
Front of Tractor to Front Axle
142.20 in
3612.00 mm
Axle to Vertical Hitch Pin
20.00 in
509.00 mm
Height – Scraper Blade Maximum
20.00 in
510.00 mm
Wheelbase
346.80 in
8808.00 mm
Rear Axle to Rear of Machine
90.20 in
2292.00 mm
Length - Maximum (Push-Pull)
655.10 in
16640.00 mm
Length – Overall Machine (Standard)
597.00 in
15164.00 mm
Extended Push Block (Push-Pull)
108.00 in
2744.00 mm
Width – Rear Tire Centers
96.90 in
2462.00 mm

Travel Speeds (Runout)

Transmission Gear: Eighth
34.70 mph
55.80 km/h
Transmission Gear: Fifth
14.10 mph
22.70 km/h
Transmission Gear: First
3.40 mph
5.50 km/h
Transmission Gear: Fourth
10.50 mph
16.90 km/h
Transmission Gear: Reverse
6.20 mph
9.90 km/h
Transmission Gear: Second
6.20 mph
10.00 km/h
Transmission Gear: Seventh
25.70 mph
41.95 km/h
Transmission Gear: Sixth
19.00 mph
30.60 km/h
Transmission Gear: Third
7.70 mph
12.40 km/h

Push-Pull

Operating Weight - Empty
119060.00 lb
54005.00 kg
Overall Length - With Bail Down
54.59 ft
16.64 m

General Data

180° Curb-to-Curb Turning Width
40.12 ft
12.23 m
Fuel Tank Refill Capacity: Scraper
370.00 gal
1400.00 L
Maximum Depth of Cut
17.70 in
450.00 mm
Maximum Depth of Spread
21.10 in
535.00 mm
Overall Shipping Height
13.62 ft
4.15 m
Overall Width
12.93 ft
3.94 m
Rated Load
37 200 kg (82,200 lb); 37.2 tonnes (41.1 tons)
Scraper Capacity: Heaped
34.00 yd3
26.00 m3
Scraper Capacity: Struck
24.00 yd3
18.30 m3
Tires: Scraper
37.25R35**E3
Tires: Tractor
37.25R35**E3
Top Speed (Loaded)
34.70 mph
55.80 km/h
Width of Cut
11.50 ft
3.51 m

Cab

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

Implement Cycle Times

Apron Lower
3.80 seconds
3.80 seconds
Apron Raise
4.00 seconds
4.00 seconds
Bail Lower
2.10 seconds
2.10 seconds
Bail Raise
1.50 seconds
1.50 seconds
Bowl Lower
3.50 seconds
3.50 seconds
Bowl Raise
3.50 seconds
3.50 seconds
Ejector Extend
8.50 seconds
8.50 seconds
Ejector Retract
8.50 seconds
8.50 seconds

Service Refill Capacities

Cooling System: Scraper
16.10 gal
61.00 L
Cooling System: Tractor
19.80 gal
75.00 L
Crankcase: Scraper
6.50 gal
24.50 L
Crankcase: Tractor
13.70 gal
52.00 L
Fuel Tank
370.00 gal
1400.00 L
Hydraulic System
37.50 gal
142.00 L
Transmission System: Scraper
12.90 gal
49.00 L
Transmission System: Tractor
29.00 gal
110.00 L

Non Push-Pull

Operating Weight - Empty
114950.00 lb
52140.00 kg
Overall Length
49.34 ft
15.04 m

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

General

180° Curb-to-Curb Turning Width
40.12 ft
12.23 m
Fuel Tank Refill Capacity - Scraper
370.00 gal (US)
1400.00 l
Maximum Depth of Cut
17.70 in
450.00 mm
Maximum Depth of Spread
21.10 in
535.00 mm
Overall Shipping Height
13.62 ft
4.15 m
Overall Width
12.93 ft
3.94 m
Rated Load
37 200 kg (82,200 lb); 37.2 tonnes (41.1 tons)
Scraper Capacity - Heaped
34.00 yd³
26.00 m³
Scraper Capacity - Struck
24.00 yd³
18.30 m³
Tires - Scraper
37.25R35**E3
Tires - Tractor
37.25R35**E3
Top Speed - Loaded
34.70 mile/h
55.80 km/h
Width - Cut
11.50 ft
3.51 m

Engine

Emissions
Cat C9.3 and C18 engines meet U.S. EPA Tier 2/EU Stage II Equivalent emission standards.
Flywheel Power - Tractor
570.00 HP
425.00 kW

Scraper Bowl

Scraper Capacity - Heaped
34.00 yd³
26.00 m³

Transmission

Top Speed - Loaded
34.70 mile/h
55.80 km/h

Service Refill Capacities

Cooling System - Scraper
16.10 gal (US)
61.00 l
Cooling System - Tractor
19.80 gal (US)
75.00 l
Crankcase - Scraper
6.50 gal (US)
24.50 l
Crankcase - Tractor
13.70 gal (US)
52.00 l
Fuel Tank
370.00 gal (US)
1400.00 l
Hydraulic System
37.50 gal (US)
142.00 l
Transmission System - Scraper
12.90 gal (US)
49.00 l
Transmission System - Tractor
29.00 gal (US)
110.00 l

Dimensions

Front of Tractor to Front Axle
142.20 in
3612.00 mm
Axle to Vertical Hitch Pin
20.00 in
509.00 mm
Wheel Base
346.80 in
8808.00 mm
Rear Axle - Rear of Machine
90.20 in
2292.00 mm
Ground Clearance - Tractor
26.10 in
664.00 mm
Height - Overall Shipping
163.20 in
4145.00 mm
Height - Scraper Blade Maximum
20.00 in
510.00 mm
Height - Top of Cab
147.00 in
3733.00 mm
Length - Overall Machine - Standard
597.00 in
15164.00 mm
Width - Inside of Bowl
134.00 in
3404.00 mm
Width - Outside Rear Tires
143.20 in
3636.00 mm
Width - Overall Machine
155.00 in
3937.00 mm
Width - Rear Tire Centers
96.90 in
2462.00 mm
Width - Tractor
137.80 in
3499.00 mm

Cab

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

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

Travel Speeds - Runout

Transmission Gear - Eighth
34.70 mile/h
55.80 km/h
Transmission Gear - Fifth
14.10 mile/h
22.70 km/h
Transmission Gear - First
3.40 mile/h
5.50 km/h
Transmission Gear - Fourth
10.50 mile/h
16.90 km/h
Transmission Gear - Reverse
6.20 mile/h
9.90 km/h
Transmission Gear - Second
6.20 mile/h
10.00 km/h
Transmission Gear - Seventh
25.70 mile/h
41.95 km/h
Transmission Gear - Sixth
19.00 mile/h
30.60 km/h
Transmission Gear - Third
7.70 mile/h
12.40 km/h

Implement Cycle Times

Apron Lower
3.80 s
3.80 s
Apron Raise
4.00 s
4.00 s
Bail Lower
2.10 s
2.10 s
Bail Raise
1.50 s
1.50 s
Bowl Lower
3.50 s
3.50 s
Bowl Raise
3.50 s
3.50 s
Ejector Extend
8.50 s
8.50 s
Ejector Retract
8.50 s
8.50 s
Features

Tractor Serviceability Improvement

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

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

This feature will allow the machine to control the slip of the tractor tires only.

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.

Advanced Cushion Hitch

With similar technology as the Cat® Advanced Ride Management seat suspension, this software 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.

High Pressure Steering

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.

Differential Lock Engagement Protection

This standard feature allows the machine to prevent the operator from engaging the differential lock when damage could occur.

Cab Improved

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

Machine Speed Limit

This feature 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.

Ground Speed Control

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

This 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.

Sequence Assist (Optional Attachment)

This option 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.

Payload Estimator (Optional Attachment)

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 Attachment)

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.

Cat Grade Control (Optional Attachment)

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.

Sales Features

Main Features and Benefits

Standard Equipment
  • 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)
Optional Equipment
  • 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)