Get a Quote
There is currently no image for this product.
637K Wheel Tractor-Scraper
Get A Quote
Standard Equipment


Operating Weight (Empty)
119060 lb
Overall Length (With Bail Down)
54.59 ft

Non Push-Pull

Operating Weight (Empty)
114950 lb
Overall Length
49.34 ft

Scraper Bowl

Scraper Capacity: Heaped
34 yd3

Implement Cycle Times

Apron Lower
3.8 Seconds
Apron Raise
4.0 Seconds
Bail Lower
2.1 Seconds
Bail Raise
1.5 Seconds
Bowl Lower
3.5 Seconds
Bowl Raise
3.5 Seconds
Ejector Extend
8.5 Seconds
Ejector Retract
8.5 Seconds


Top Speed (Loaded)
34.7 mph


Width – Overall Machine
155 in
Width – Tractor
137.8 in
Width – Inside of Bowl
134 in
Width – Outside Rear Tires
143.2 in
Height – Overall Shipping
163.2 in
Height – Top of Cab
147 in
Ground Clearance – Tractor
26.1 in
Front of Tractor to Front Axle
142.2 in
Axle to Vertical Hitch Pin
20 in
Height – Scraper Blade Maximum
20 in
346.8 in
Rear Axle to Rear of Machine
90.2 in
Length – Maximum (Push-Pull)
655.1 in
Length – Overall Machine (Standard)
597 in
Width – Overall Machine – Ladder Down
108 in
Width – Rear Tire Centers
96.9 in

Travel Speeds (Runout)

Transmission Gear: Eighth
34.7 mph
Transmission Gear: Fifth
14.1 mph
Transmission Gear: First
3.4 mph
Transmission Gear: Fourth
10.5 mph
Transmission Gear: Reverse
6.2 mph
Transmission Gear: Second
6.2 mph
Transmission Gear: Seventh
25.7 mph
Transmission Gear: Sixth
19.0 mph
Transmission Gear: Third
7.7 mph


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

General Data

180° Curb-to-Curb Turning Width
40.12 ft
Fuel Tank Refill Capacity: Scraper
370 gal
Maximum Depth of Cut
17.7 in
Maximum Depth of Spread
21.1 in
Overall Shipping Height
13.62 ft
Overall Width
12.93 ft
Rated Load
37 200 kg (82,200 lb); 37.2 tonnes (41.1 tons)
Scraper Capacity: Heaped
34 yd3
Scraper Capacity: Struck
24 yd3
Tires: Scraper
Tires: Tractor Drive
Top Speed (Loaded)
34.7 mph
Width of Cut
11.50 ft

Safety Criteria Compliance Standards

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

Tractor Engine

Flywheel Power: Tractor/Scraper

Service Refill Capacities

Cooling System: Scraper
16.1 gal
Cooling System: Tractor
19.8 gal
Crankcase: Scraper
6.5 gal
Crankcase: Tractor
13.7 gal
Diesel Exhaust Fluid: Scraper
5.8 gal
Diesel Exhaust Fluid: Tractor
8 gal
Fuel Tank
370 gal
Hydraulic System
37.5 gal
Transmission System: Scraper
12.9 gal
Transmission System: Tractor
29 gal


Engine Model: Scraper
Cat C9.3 ACERT
Engine Model: Tractor
Cat C18 ACERT™
Flywheel Power: Scraper
290 hp
Flywheel Power: Tractor
570 hp
Cat C9.3 ACERT and C18 ACERT engines meet U.S. EPA Tier 4 Final/EU Stage IV emission standards.
Rated Engine RPM: Scraper
2150 RPM
Rated Engine RPM: Tractor
1900 RPM
Main Features and Benefits

Main Features and Benefits

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.


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.