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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.

Cat Specs
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Tractor Engine

Flywheel Power - Tractor/Scraper
570

Scraper Bowl

Scraper Capacity - Heaped
34 yd³

Transmission

Top Speed - Loaded
34.7 mile/h

Engine

Emissions
Cat C9.3 and C18 engines meet U.S. EPA Tier 4 Final/EU Stage IV emission standards.
Engine Model - Tractor
Cat C18
Flywheel Power - Tractor
570 HP
Rated Engine RPM - Tractor
1900 r/min

Dimensions

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
Wheel Base
346.8 in
Rear Axle - Rear of Machine
90.2 in
Width - Rear Tire Centers
96.9 in
Length - Overall Machine - Standard
597 in
Length - Maximum (Push-Pull)
655.1 in

General

Maximum Depth of Cut
17.7 in
Rated Load
37 200 kg (82,200 lb); 37.2 tonnes (41.1 tons)
Scraper Capacity - Struck
24 yd³
Overall Shipping Height
13.62 ft
Scraper Capacity - Heaped
34 yd³
Tires - Scraper
37.25R35**E3
Fuel Tank Refill Capacity - Scraper
370 gal (US)
Tires - Tractor
37.25R35**E3
Overall Width
12.93 ft
Width - Cut
11.5 ft
Maximum Depth of Spread
21.1 in
180° Curb-to-Curb Turning Width
40.12 ft
Top Speed - Loaded
34.7 mile/h

Service Refill Capacities

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

Push-Pull

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

Safety Criteria Compliance Standards

Steering System
ISO 5010:2007
Seat Belt
SAE J386:FEB2006
Brakes
ISO 3450:2011
Reverse Alarm
ISO 9533:2010
Falling Object Protective Structure (FOPS)
ISO 3449:2005 Level II
Rollover Protection Structure (ROPS)
ISO 3471:2008 for up to 21 282 kg (46,919 lb)

Travel Speeds - Runout

Transmission Gear - Second
6.2 mile/h
Transmission Gear - First
3.4 mile/h
Transmission Gear - Eighth
34.7 mile/h
Transmission Gear - Third
7.7 mile/h
Transmission Gear - Sixth
19 mile/h
Transmission Gear - Seventh
25.7 mile/h
Transmission Gear - Fourth
10.5 mile/h
Transmission Gear - Reverse
6.2 mile/h
Transmission Gear - Fifth
14.1 mile/h

Implement Cycle Times

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

Non Push-Pull

Operating Weight - Empty
114950 lb
Overall Length
49.34 ft

Cab

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