The R2900G underground loader is designed for high production, low cost-per-ton loading and tramming in underground mining applications. Compact design with agile performance, rugged construction and simplified maintenance ensures excellent productivity, long life and low operating costs. Engineered for performance, designed for comfort, built to last.

Engine Model Cat® C15 ACERT™
Rated Power 1800 r/min
Gross Power - SAE J1995 409 HP
Bore 5.4 in
Stroke 6.8 in
Displacement 927.9 in³
Gross Power - Tier 3 Engine - SAE J1995 409 HP
Gross Power - VR Engine - SAE J1995 409 HP

Operating Specifications
Nominal Payload Capacity 37926 lb
Gross Machine Mass 155095 lb
Static Tipping Load - Straight Ahead - Lift Arms Horizontal 88015 lb
Static Tipping Load - Full Turn - Lift Arms Horizontal 75109 lb
Breakout Force - SAE 60298 lb

Empty* 110692 lb
Loaded* 148611 lb
Empty - Front Axle 50832 lb
Empty - Rear Axle 59860 lb
Loaded - Front Axle 110716 lb
Loaded - Rear Axle 37895 lb

Forward - 1 3.4 mile/h
Forward - 2 6 mile/h
Forward - 3 10.7 mile/h
Forward - 4 18.5 mile/h
Reverse - 1 4.1 mile/h
Reverse - 2 7.3 mile/h
Reverse - 3 13 mile/h
Reverse - 4 22 mile/h

Hydraulic Cycle Times
Raise 9.2 s
Dump 3.4 s
Lower, Empty, Float Down 3.1 s
Total Cycle Time 15.7 s

Bucket Capacities
Bucket Capacities 6.3-8.9 m3 (8.2-11.6 yd3)
Dump Bucket - 1** 8.2 yd³
Dump Bucket - 2** 9.4 yd³
Dump Bucket - 3** 10.9 yd³
Dump Bucket - 4** 11.6 yd³

Turning Dimensions
Axle Oscillation
Articulation Angle 42.5°
Inner Clearance Radius 133.2 in
Outside Clearance Radius 288.3 in

Tire Size 29.5 × 29 34 PLY VSMS

Service Refill Capacities
Engine Crankcase 9 gal (US)
Front Differential and Final Drives - With Axle Oil Cooling System 42 gal (US)
Rear Differential and Final Drives - With Axle Oil Cooling System 44.1 gal (US)
Cooling System 19.8 gal (US)
Front Differential and Final Drives 31.4 gal (US)
Fuel Tank - Dual 376.4 gal (US)
Hydraulic Tank 37 gal (US)
Rear Differential and Final Drives 33.5 gal (US)
Transmission 16.4 gal (US)

Standards ROPS/FOPS Certified Cab

Bucket Capacities
Note **High penetration bucket versions also available.

Note *Calculated Weight.

Power Train – Engine

The Cat C15 ACERT engine provides unequalled lugging force while digging, tramming and traversing steep grades. Torque rise effectively matches transmission shift points for maximum efficiency and fast cycle times. Mechanically Actuated, Electronic Unit Injection (MEUI™) high-pressure, direct injection fuel system electronically monitors operator demands and sensor inputs to optimize engine performance. Air-to-air aftercooling provides improved fuel economy by packing cooler, denser air into cylinders for more complete combustion of fuel and lower emissions. Oil coiled pistons increase heat dissipation and promote longer piston life. The crankshaft is forged and induction hardened for long-term durability. The Cat C15 engine features the optional Ventilation Reduction Package. The VR Package incorporates selective engine hardware and software to minimize diesel particulate matter in the engine exhaust. Engines equipped with the VR Package feature a significant ventilation rate reduction, a decrease in fuel consumption, and maintained or improved product performance. VR Package availability is subject to regional regulatory compliance. Optional U.S. EPA Tier 3 and EU Stage III compliant engine is also available. A Cat Diesel Particulate Filter can be used with the VR engine package. The filter compliments the VR engine by further reducing particulate matter in the exhaust. Requires the use of 15 PPM ultra low sulfur diesel and CJ-4 low ash engine oil.

Operator Comfort

The operator station is ergonomically designed for total machine control in a comfortable, productive and safe environment. All controls, levers, switches and gauges are positioned to maximize productivity and minimize operator fatigue.