Caterpillar 631G Scraper

Bowl

Heaped Capacity 31 cu yd (24 cu m)
Max Depth of Cut 17 in (44 cm)
Rated Payload 75,000 lbs (34,019 kg)
Struck Capacity 21 cu yd (16 cu m)
Width of Cut 12 ft (4 m)

Dimensions

Axle to Vertical Hitch Pin 22 in (55 cm)
Height – Overall Shipping 168 in (426 cm)
Height – Scraper Blade Maximum 22 in (55 cm)
Height – Top of Cab 12 ft (4 m)
Length – Overall Machine 573 in (1,456 cm)
Overall Height 14 ft (4 m)
Overall Length 48 ft (15 m)
Overall Width 13 ft (4 m)
Tractor Ground Clearance 2 ft (1 m)
Wheelbase 29 ft (9 m)
Width – Inside of Bowl 134 in (340 cm)
Width – Outside Rear Tires 143 in (364 cm)
Width – Tractor 137 in (348 cm)

Engine

Tractor Engine 3408E

Hydraulic System

Apron Cylinder Bore 8 in (21 cm)
Apron Cylinder Stroke 29 in (73 cm)
Bowl Cylinder Bore 7 in (18 cm)
Bowl Cylinder Stroke 34 in (87 cm)
Compensator Settings – Cushion Hitch Circuit 2320 psi
Cushion Hitch Circuit 9 gpm (34 lpm)
Ejector Cylinder Bore 8 in (21 cm)
Ejector Cylinder Stroke 74 in (188 cm)
Relief Valve – Implement Circuit 2030 psi
Relief Valve – Steering Circuit 1987 psi
Scraper Circuit 91 gpm (344 lpm)
Secondary Steering Circuit 77 gpm (291 lpm)
Steering Circuit 103 gpm (390 lpm)

Operating Specifications

Alternator Supplied Amperage 75 amps
Cooling System Fluid Capacity 32 gal (121 l)
Differential Fluid Capacity 36 gal (136 l)
Engine Oil Fluid Capacity 12 gal (44 l)
Fuel Capacity 215 gal (814 l)
Hydraulic System Fluid Capacity 50 gal (190 l)
Operating Voltage 24 volts
Tire Size 37.50-R35
Transmission Fluid Capacity 33 gal (125 l)
Wheel Coolant Fluid Capacity – each 20 gal (75 l)

Scraper Bowl

Apron Closure Force 38,250 lbs (17,350 kg)
Apron Opening 79 in (201 cm)
Capacity – Struck 21 cu yd (16 cu m)
Capacity Heaped 34 cu yd (26 cu m)
Cutting Edge Thickness 2 in (4 cm)
Depth of Spread – Maximum 19 in (48 cm)
Ground Clearance – Maximum 22 in (55 cm)
Hyd. Penetration Force – 621G 57,375 lbs (26,025 kg)
Rated Load 75,000 lbs (34,019 kg)
Scraper Capacity – Heaped 31 cu yd (24 cu m)

Service Refill Capacities – Scraper

Wheel Coolant – Each 20 gal (75 l)

Service Refill Capacities – Tractor

Cooling System 32 gal (121 l)
Crankcase 12 gal (44 l)
Differential 36 gal (136 l)
Final Drive – Each 7 gal (26 l)
Hydraulic Reservoir 50 gal (189 l)
Transmission 33 gal (125 l)
Wheel Coolant – Each 20 gal (74 l)
Windshield Washer 6 gal (23 l)

Standards

Brakes Meets ISO 3450: 1996 standard

Steering System

Ground-Driven Secondary Steering System 51 gpm (193 lpm)
Hydraulic Output 96 gpm (364 lpm)
Steering Angle – Left 85 degrees
Steering Angle – Right 90 degrees
Width – 180 degrees Turn 40 ft (12 m)

Tractor Engine

Caterpillar Net Power 490 hp (365 kw)
Displacement 1,099 cu in (18,009 cu cm)
EEC 80/1269 490 hp (365 kw)
Flywheel Power – Tractor/Scraper 373 kW (500)
Gross Power 515 hp (384 kw)
Gross Power – Gears 3-8 515 hp (384 kw)
ISO 9249 490 hp (365 kw)
Make Caterpillar
Model 3408E
Net Power – Gears 1-2 450 hp (336 kw)
Net Power – Gears 3-8 490 hp (365 kw)
Net Power – Tractor/Scraper 336 kW (450)
SAE J1349 490 hp (365 kw)

Transmission

1 Forward 3 mph (5 kph)
2 Forward 5 mph (8 kph)
3 Forward 7 mph (12 kph)
4 Forward 10 mph (16 kph)
5 Forward 13 mph (22 kph)
6 Forward 18 mph (29 kph)
7 Forward 25 mph (39 kph)
8 Forward 33 mph (53 kph)
Max Speed Forward 33 mph (53 kph)
Max Speed Reverse 6 mph (10 kph)
Number of Forward Gears 8
Number of Reverse Gears 1
Reverse 6 mph (10 kph)
Top Speed – Loaded 33 mph (53 kph)
Transmission Type 8-speed automatic Powershift with Electronic Control

Weights

Front Axel – loaded 94,054 lbs (42,662 kg)
Front Axle – empty 68,648 lbs (31,138 kg)
Operating Weight 102,460 lbs (46,475 kg)
Rear Axle – empty 33,812 lbs (15,337 kg)
Rear Axle – loaded 83,406 lbs (37,832 kg)
Total Operating – empty 102,460 lbs (46,475 kg)
Total Operating – Loaded 177,460 lbs (80,495 kg)

Weights – Standard, Tandem

Front Axle 68,648 lbs (31,138 kg)
Front Axle Weight – Loaded 94,054 lbs (42,662 kg)
Rear Axle 33,812 lbs (15,337 kg)
Rear Axle – Weight – Loaded 83,406 lbs (37,832 kg)
Scraper Shipping 54,004 lbs (24,496 kg)
Total Operating – Empty 102,460 lbs (46,475 kg)
Total Operating – Loaded 177,460 lbs (80,495 kg)
Total Shipping 100,006 lbs (45,362 kg)
Tractor Shipping 46,002 lbs (20,866 kg)
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