Dimensions
| CAT AD55 Dump Body |
Cat 311-4729 |
Cat 308-5385 |
Cat 311-4728 |
| 1. Height to Top of Empty Body |
126.1 in (3202 mm) |
134.6 in (3418 mm) |
140.2 in (3560 mm) |
| 2. Height to Top of ROPS |
118.1 in (3000 mm) |
118.1 in (3000 mm) |
118.1 in (3000 mm) |
| 3. Body Loading Height |
119.9 in (3045 mm) |
130.9 in (3326 mm) |
136.7 in (3473 mm) |
| 4. Dump Clearance |
20.2 in (514 mm) |
20.2 in (514 mm) |
20.2 in (514 mm) |
| 5. Height to Top of Raised Body |
274.4 in (6969 mm) |
283.5 in (7202 mm) |
288.7 in (7334 mm) |
| 6. Ground Clearance |
15.4 in (391 mm) |
15.4 in (391 mm) |
15.4 in (391 mm) |
| 7. Height to Top of Load (SAE 2:1) |
151.5 in (3848 mm) |
164.5 in (4178 mm) |
170.6 in (4333 mm) |
| 8. Max Body Raised |
454.6 in (11547 mm) |
459.2 in (11663 mm) |
461.6 in (11724 mm) |
| 9. Overall Body Down |
453.6 in (11523 mm) |
453.6 in (11523 mm) |
453.6 in (11523 mm) |
| 10. Front Axle to Front Bumper |
143.6 in (3647 mm) |
143.6 in (3647 mm) |
143.6 in (3647 mm) |
| 11. Front Axle to Hitch |
75.6 in (1920 mm) |
75.6 in (1920 mm) |
75.6 in (1920 mm) |
| 12. Wheelbase |
232.3 in (5900 mm) |
232.3 in (5900 mm) |
232.3 in (5900 mm) |
| 13. Rear Axle to Tail |
77.8 in (1976 mm) |
77.8 in (1976 mm) |
77.8 in (1976 mm) |
| 14. Rear Wheel to Raised Body |
33.7 in (856 mm) |
33.7 in (856 mm) |
33.7 in (856 mm) |
| 15. Overall Width over Tires |
128.0 in (3250 mm) |
128.0 in (3250 mm) |
128.0 in (3250 mm) |
| 16. Machine Width with Body |
131.7 in (3346 mm) |
137.0 in (3480 mm) |
137.0 in (3480 mm) |
| 17. Machine Width without Body |
131.7 in (3346 mm) |
131.7 in (3346 mm) |
131.7 in (3346 mm) |
| 18. Recommended Clearance Width |
196.9 in (5000 mm) |
196.9 in (5000 mm) |
196.9 in (5000 mm) |
| 19. Recommended Clearance Height |
196.9 in (5000 mm) |
196.9 in (5000 mm) |
196.9 in (5000 mm) |
Turning Dimensions
| Outside Turning Radius |
389.2 in (9885 mm) |
| Outside Turning Radius |
218.1 in (5540 mm) |
| Articulation Angle |
42.5º |
| Frame Oscillation |
10º |
Weights
| CAT AD55 |
Empty |
Loaded |
| Operating Weight |
103617 lb (47000 kg) |
226871 lb (102000 kg) |
| Front Axle Load |
69004 lb (31300 kg) |
106267 lb (48202 kg) |
| Rear Axle Load |
34612 lb (15700 kg) |
118604 lb (53798 kg) |
| Front Axle Weight Distribution |
66% |
47% |
| Rear Axle Weight Distribution |
34% |
53% |
Dump System
| Nominal Payload Capacity |
121254 lb (55000 kg) |
| Body Capacity, Standard (Cat 311-4729) |
35.2 yd3 (26.9 m3) |
| Body Capacity (Cat 308-5385) |
42.6 yd3 (32.6 m3) |
| Body Capacity (Cat 311-4727) |
44.2 yd3 (33.8 m3) |
| Body Capacity (Cat 311-4728) |
47.9 yd3 (36.6 m3) |
| Body Hoist Raise Time |
12 sec |
| Body Hoist Lower Time |
24 sec |
| Body Hoist Total Cycle |
36 sec |
Engine Details
| Number of Cylinders |
6 |
| Engine Make |
Caterpillar |
| Engine Model |
CAT C18 Accert |
| Displacement |
1104.6 cu in (18.1 L) |
| Bore |
5.7 in (145 mm) |
| Stroke |
7.2 in (183 mm) |
| Gross Power, SAE J1995 |
589 hp (439 kw) |
| Net Power, SAE J1349 |
555 hp (414 kw) |
| Net Power, ISO 9249 |
555 hp (414 kw) |
| Power Measured @ |
2000 rpm |
| Aspiration |
Turbocharged Aftercooled |
| Emission Standards |
US EPA Tier 3 + EU Stage IIIA |
Transmission
| Type |
7-speed planetary power shift transmission |
| Number Of Forward Gears |
7 |
| Number Of Reverse Gears |
2 |
| Max Forward Speed |
26.9 mph (43.3 km/h) |
| Max Reverse Speed |
5.7 mph (9.2 km/h) |
| Differential Ratio |
3.46:1 |
| Final Drive Ratio |
5.5:1 |
| Total Reduction Ratio |
19.04:1 |
| Service Brakes |
Oil-cooled multiple disc integrated braking system |
| Parking Brake |
The integrated system combines the service, secondary, parking brake and retarding functions |
| Retarder Control |
Automatic Electronically controls retarding on grade to maintain optimum engine rpm and oil cooling |
Operational Specs
| Max Operating Weight |
226871 lb (102000 kg) |
| Nominal Payload Capacity |
121254 lb (55000 kg) |
| Operating Voltage |
24 V |
| Alternator |
95 amps |
| Battery |
2x 12 V, 190 Ah, CCA 1300, 4D BCI heavy-duty |
| Tire Size |
35 x 65 R33 |
Cab
| ROPS |
ISO3471, SAEJ1040, AS2294.2, EN13510 |
| FOPS |
ISO3449, SAEJ231, AS2294.3, EN13627 |
| Enclosed Cab (Optional) |
Optional sound-suppressed ROPS cab provides a quiet, secure working environment |
| Operator Seat |
Fully adjustable suspension seat with adjustable armrests and wide retractable seat belts |
| Monitoring System |
Caterpillar Electronic Monitoring System (CEMS): Gauge Cluster + Speedometer / Tachometer / Gear Indicator + Message Center |
Service Refill Capacities
| Fuel Tank Capacity |
253.6 gal (960 L) |
| Engine Oil Capacity |
16.9 gal (64 L) |
| Cooling System Capacity |
19.8 gal (75 L) |
| Transmission Oil Capacity |
14 gal (53 L) |
| Front Differentials and Final Drives |
36.5 gal (138 L) |
| Rear Differentials and Final Drives |
36.5 gal (138 L) |
| Hydraulic Tank Capacity |
68.2 gal (258 L) |
The CAT AD55 Underground Truck is a high-capacity, heavy-duty hauling solution designed specifically for demanding underground mining operations. With its rugged construction, advanced powertrain, and large payload capacity, the AD55 offers exceptional performance in confined spaces. It is engineered to deliver faster cycle times, superior durability, and operator comfort while meeting strict safety and emissions standards. Ideal for high-production environments, the AD55 ensures maximum uptime and productivity in deep mining applications.
