Contents
Dimensions
| Overall Length | 384 in (9760 mm) |
| Overall Width | 137 in (3480 mm) |
| Overall Height to Top of Cab | 140 in (3560 mm) |
| Wheelbase | 191 in (4850 mm) |
| Load Height | 126 in (3200 mm) |
| Dump Height (Body Raised) | 216 in (5490 mm) |
| Dump Clearance | 18 in (455 mm) |
| Turning Circle | 311 in (7900 mm) |
Dump System
| Body Capacity, Struck | 22.1 yd3 (16.9 m3) |
| Body Capacity, Heaped SAE 2:1 | 29.3 yd3 (22.4 m3) |
| Rated Payload Capacity | 80030 lb (36300 kg) |
| Dump Angle | 65° |
| Power Up Cycle Time | 10 sec |
| Power Down Cycle Time | 6 sec |

Weights
| CAT D40D | Empty | Loaded |
|---|---|---|
| Front Axle | 38310 lb (17377 kg) | 55292 lb (25080 kg) |
| Rear Axle | 23479 lb (10650 kg) | 86483 lb (39228 kg) |
| Total Weight | 61789 lb (28027 kg) | 141775 lb (64308 kg) |
Engine Details
| Number of Cylinders | 6 |
| Engine Make | Caterpillar |
| Engine Model | Cat 3406B |
| Displacement | 893 cu in (14.6 L) |
| Bore | 5.4 in (137 mm) |
| Stroke | 6.5 in (165 mm) |
| Gross Power | 400 hp (298 kw) |
| Net Power | 385 hp (287 kw) |
| Power Measured @ | 2100 rpm |
| Torque Rise | 36% |
| Fuel System | Direct injection |
| Lubrication System | Pressure lubrication with full flow filtering and oil cooler |
| Air Cleaner | Dry type air cleaner with primary and secondary elements, automatic dust ejector and service indicator |
| Aspiration | Turbocharged and aftercooled |

Operational Specs
| Operating Weight (Empty) | 61789 lb (28027 kg) |
| Operating Weight (GMW) | 141775 lb (64308 kg) |
| Operating Voltage | 24 V |
| Alternator | 45 amps |
| Battery | 2x 12 V, 172 Ah |
| Operator Station | Cab with ROPS / FOPS |
| ROPS | SAE J1040c, ISO 3471-1986 |
| FOPS | SAE J231 JAN81 and ISO 3449-1984 |
| Front Tire Size | 29.5R25 |
| Rear Tire Size | 33.25R29 |
Transmission
| Type | Planetary power shift transmission |
| Number of Gears | 4F / 4R |
| Max Forward Speed | 34.4 mph (55.4 km/h) |
| Max Reverse Speed | 42.7 mph (68.9 km/h) |
| Service Brakes | Self adjusting, wedge type shoe brakes are air- and hydraulic operated on front axle. Oil-immersed disc brakes, air- and hydraulic operated, on rear axle |
| Secondary Brake | Independent, hand operated, all-wheel secondary back-up system with separate air tank |
| Parking Brake | Hand operated, spring-applied, nir-released brake acts on rear axle |
| Retarder | Hydraulically actuated, torque converter-mounted retarder |
Hydraulic System
| Pump Flow Capacity | 50 gal/min (190 L/min) |
| Hoist Cylinders | Two flex free, two stage, double-acting hoist cylinders positioned within body profile for maximum protection |
| Steering System | Articulated frame, hydraulic steering. Ground-driven supplemental steering system is standard (SAE J53) |
| Steering Cylinders | Double-acting, cushioned steering cylinders articulate machine 45° to left or right |
Service Refill Capacities
| Fuel Tank Capacity | 120 gal (450 L) |
| Engine Oil Capacity | 8 gal (30 L) |
| Cooling System Capacity | 23 gal (87 L) |
| Transmission Oil Capacity | 27 gal (102 L) |
| Hydraulic System Capacity | 54 gal (203 L) |
| Front Axle Final Drives, Differentials | 10 gal (38 L) |
| Rear Axle Final Drives, Differentials | 12.7 gal (48 L) |
| Brake Oil Tank Capacity | 30 gal (114 L) |