Caterpillar is excited to announce the 651 comeback into our Wheel Tractor-Scraper lineup in 2022. Delivering high levels of productivity, the 651 single engine earthmoving system is a wise choice on numerous large-scale projects by providing fast cycle times when working in lower grades and rolling resistance applications. First introduced into the Cat® Wheel Tractor-Scraper lineup in 1962, the 651 continues to uphold its legacy as one of our signaturemachines. Its single engine power gives the ability to work with a Cat D10 or D11 push dozer delivering ultra-fast load times and the ability to work in abrasive or rocky conditions. Improvements in productivity, combined with enhancements in operator comfort, and new safety features – Powered Access System and effective wet disc brakes – for a machine offering high returns on profit and time
Engine
Tractor Engine
| Flywheel Power - Tractor/Scraper |
469kW (629 hp) |
| Bore |
145 mm |
| Stroke |
183 mm |
| Displacement |
18.1 l |
| Net Power (SAE J1349/ISO 9249) |
592 hp |
| Gross Power (SAE J1995) |
637 hp |
| Net Power (ISO 14396) |
585 hp |
| Net Power |
469 kW/629 hp (ISO 14369:2002) |
Scraper Bowl
| Scraper Capacity - Heaped |
33.6 m³ |
| Rated Load |
47174 kg |
| Capacity - Struck |
24.5 m³ |
| Depth of Cut - Maximum |
417 mm |
| Width - Cut - To Router Bits |
3.8 m |
| Ground Clearance - Maximum |
0.7 m |
| Depth of Spread - Maximum |
660 mm |
| Apron Opening |
2337 mm |
| Apron Closure Force |
176 kN |
| Hyd. Penetration Force - 657G |
542 kN |
Transmission
| Top Speed - Loaded |
56.1 km/h |
| 1 Forward |
5.7 km/h |
| 2 Forward |
10.5 km/h |
| 3 Forward |
12.5 km/h |
| 4 Forward |
17 km/h |
| 5 Forward |
22.8 km/h |
| 6 Forward |
30.9 km/h |
| 7 Forward |
41.4 km/h |
| 8 Forward |
56.1 km/h |
| Reverse |
10.8 km/h |
Hydraulics
| Bowl Cylinder Bore |
180 mm |
| Bowl Cylinder Stroke |
950 mm |
| Apron Cylinder Bore |
180 mm |
| Apron Cylinder Stroke |
759.5 mm |
| Steering Circuit (@ High Idle) |
288 L/min |
| Cushion Hitch Circuit |
74 L/min |
| Secondary Steering Circuit |
55 l/hr |
| Relief Valve - Steering Circuit |
13500 kPa |
| Relief Valve - Implement Circuit |
13780 kPa |
| Compensator Settings - Cushion Hitch Circuit |
20700 kPa |
Steering
| Width - 180° Turn - Right |
13.6 m |
| Width - 180° Turn - Left |
14.5 m |
| Steering Angle - Right |
90 |
| Steering Angle - Left |
85 |
Service Refill Capacities - Tractor
| Crankcase |
52 l |
| Transmission |
136 l |
| Differential |
136 l |
| Final Drive - Each |
24 l |
| Cooling System |
88.6 l |
| Hydraulic Reservoir |
150 l |
| Windshield Washer |
5 l |
Dimensions
| Width - Overall Machine |
4.36 m |
| Width - Tractor |
3.62 m |
| Width - Rear Tire Center Lines |
2.81 m |
| Width - Inside of Bowl |
3.68 m |
| Width - Outside Bowl - Shipping Width |
3.91 m |
| Height - Overall Shipping |
4.42 m |
| Height - Top of Cab |
3.89 m |
| Ground Clearance - Tractor |
0.7 m |
| Front of Tractor to Front Axle |
3.88 m |
| Axle to Vertical Hitch Pin |
0.55 m |
| Height - Scraper Blade Maximum |
0.66 m |
| Wheel Base |
9.96 m |
| Length - Overall Machine |
17.97 m |
| Rear Axle - Rear of Machine |
2.46 m |
Weights - Push-Pull
| Total Shipping |
72804 kg |
| Tractor Shipping |
42472 kg |
| Scraper Shipping |
29061 kg |
| Total Operating - Empty |
74500 kg |
| Front Axle |
42566 kg |
| Rear Axle |
30238 kg |
| Total Operating - Loaded |
121700 kg |
| Front Axle - Loaded |
60856 kg |
| Rear Axle - Loaded |
59121 kg |
Service Refill Capacities - Scraper
| Crankcase |
34 l |
| Transmission |
121 l |
| Cooling System |
63.2 l |
| Final Drive - Each |
30 l |
| Fuel Tank |
1628 l |
| Differential |
168 l |
