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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™ Cat® C15 ACERT™ Less
Rated Power 1800.0 RPM 1800.0 RPM Less
Gross Power – SAE J1995 447.0 hp 333.0 kW Less
Bore 5.4 in 137.2 mm Less
Stroke 6.8 in 171.5 mm Less
Displacement 927.9 in3 15.2 L Less
Gross Power – SAE J1995 321/333 kW (430/447 hp) 321/333 kW (430/447 hp) Less
Gross Power – SAE J1995 (1st gear/2nd-4th gear) 321/333 kW (430/447 hp) 321/333 kW (430/447 hp) Less
Net Power – 80/1269/EEC 288/300 kW (386/402 hp) 288/300 kW (386/402 hp) Less
Net Power – ISO 9249 288/300 kW (386/402 hp) 288/300 kW (386/402 hp) Less
Net Power – SAE J1349 290/302 kW (389/405 hp) 290/302 kW (389/405 hp) Less
Net Power – SAE J1349 (1st gear/2nd-4th gear) 290/302 kW (389/405 hp) 290/302 kW (389/405 hp) Less
Rated Power 1,900/1,800 rpm 1,900/1,800 rpm Less

Operating Specifications

Nominal Payload Capacity 37926.0 lb 17200.0 kg Less
Gross Machine Operating Weight 148611.0 lb 67409.0 kg Less
Static Tipping Load Straight Ahead Lift Arms Horizontal 88015.0 lb 39923.0 kg Less
Static Tipping Load Full Turn Lift Arms Horizontal 75109.0 lb 34069.0 kg Less
Breakout Force (SAE) 60298.0 lb 27346.0 kg Less


Empty 110692.0 lb 50209.0 kg Less
Loaded 148611.0 lb 67409.0 kg Less
Empty – Front Axle 50832.0 lb 23057.0 kg Less
Empty – Rear Axle 59860.0 lb 27152.0 kg Less
Loaded – Front Axle 110716.0 lb 50220.0 kg Less
Loaded – Rear Axle 37895.0 lb 17189.0 kg Less


Forward 1 3.1 mph 5.0 km/h Less
Forward 2 5.5 mph 8.8 km/h Less
Forward 3 9.4 mph 15.2 km/h Less
Forward 4 15.7 mph 25.3 km/h Less
Reverse 1 3.9 mph 6.2 km/h Less
Reverse 2 6.8 mph 10.9 km/h Less
Reverse 3 11.6 mph 18.6 km/h Less
Reverse 4 16.4 mph 26.4 km/h Less

Hydraulic Cycle Time

Raise 9.2 Seconds 9.2 Seconds Less
Dump 3.4 Seconds 3.4 Seconds Less
Lower, Empty, Float Down 3.1 Seconds 3.1 Seconds Less
Total Cycle Time 15.7 Seconds 15.7 Seconds Less

Bucket Capacities

Bucket Capacities 6.3-8.9 m3 (8.2-11.6 yd3) 6.3-8.9 m3 (8.2-11.6 yd3) Less
Dump Bucket – 1* 8.2 yd3 6.3 m3 Less
Dump Bucket – 2* 9.4 yd3 7.2 m3 Less
Dump Bucket – 3* 10.9 yd3 8.3 m3 Less
Dump Bucket – 4* 11.6 yd3 8.9 m3 Less

Turning Dimensions

Axle Oscillation 8.0 Degrees 8.0 Degrees Less
Articulation Angle 42.5 Degrees 42.5 Degrees Less
Inner Clearance Radius** 133.2 in 3383.0 mm Less
Outside Clearance Radius** 288.3 in 7323.0 mm Less


Tire Size 29.5 × 29 34 PLY STMS 29.5 × 29 34 PLY STMS Less

Service Refill Capacities

Engine Crankcase 9.0 gal 34.0 L Less
Front Differential and Final Drives (with Axle Oil Cooling System) 42.0 gal 159.0 L Less
Rear Differential and Final Drives (with Axle Oil Cooling System) 44.1 gal 167.0 L Less
Secondary Fuel Tank (If Equipped) 150.8 gal 571.0 L Less
Cooling System 19.8 gal 75.0 L Less
Front Differential and Final Drives 31.4 gal 119.0 L Less
Fuel Tank 225.6 gal 854.0 L Less
Hydraulic Tank 37.0 gal 140.0 L Less
Rear Differential and Final Drives 33.5 gal 127.0 L Less
Transmission 16.4 gal 62.0 L Less


Brakes ISO 3450, AS2958.1, CAN-CSA424.30-M90 ISO 3450, AS2958.1, CAN-CSA424.30-M90 Less
Cab/FOPS ISO 3449, SAE J231, AS2294.3, EN13627 ISO 3449, SAE J231, AS2294.3, EN13627 Less
Cab/ROPS ISO 3471, SAE J1040, AS2294.2, EN13510 ISO 3471, SAE J1040, AS2294.2, EN13510 Less

Power Train – Engine

The Cat® C15 engine with ACERT™ Technology delivers the power and reliability necessary to perform in the most demanding underground mining applications.

Power Train – Transmission

More power to the ground for greater productivity.


Cat hydraulics deliver the power and control to keep material moving.


Rugged Cat structures – the backbone of the R2900G’s durability.

Operator Comfort

Ergonomically designed for all-day comfort, control and productivity.

Loader Bucket Systems

Rugged performance and reliability in tough underground mining applications.


More time for production.

Customer Support

Cat® dealer services keep underground mining equipment productive.


Cat mining machines and systems are designed with safety as their first priority.

R2900G Standard Equipment

  • Alternator, 95-amp
  • Battery Disconnect Switch, Ground Level
  • Corrosive Protection Spray
  • Diagnostic Connector
  • Electric Starting, 24-volt
  • Engine Shutdown Switch
  • External Lighting System, Front, Rear
  • Low Maintenance Batteries
  • Reversing Alarm
  • Starting and Charging System

  • Cat Electronic Monitoring System (Cat EMS)
  • Electric Horns
  • Gauges
  • Pilot Hydraulic Implement Controls, Single Joystick
  • ROPS/FOPS Structure
  • STIC Steering
  • Suspension Seat with Retractable Seat Belt

  • Cat C15 ATAAC Diesel Engine with ACERT™ Technology, 6-Cylinder
  • Long Life Coolant
  • Full Hydraulic Enclosed Wet Multiple-Disc Brakes (SAFR™)
  • Planetary Powershift Transmission with Automatic Shift Control, 4 Speed Forward/4 Speed Reverse
  • Engine Air Intake Precleaner
  • Torque Converter
  • Transmission Neutralizer
  • Fuel Priming Aid
  • Crossflow Radiator

  • Auto Park Brake
  • Brake Axle Cooling
  • Bucket Positioner, Return To Dig
  • Catalytic Exhaust Purifier/Muffler Group
  • Engine and Transmission Belly Guards
  • Fenders, Front, Rear
  • Firewall
  • Hardox 450 Bucket Lip
  • Operator Present System
  • Rear Frame Protection Wear Bars 100 × 50 mm (4 × 2 in)
  • Semi Centralized Lubrication Points
  • Swing Out Radiator Grill
  • Tires, STMS (L5) 29.5 × 29 34-Ply

R2900G Optional Equipment

Alternative Tire Arrangements

Automatic Lube System

Auxiliary Start Receptacle

Brake Light

Brake Pressure Gauges

Brake Release Arrangements

Bucket Heel Shrouds

Bucket Sacrificial Wear Strip Package

Centralized Lube System, Manual

Color Rearview Camera

Draw Bar Attachment, Bolt-on

Electronic Access Module

Enclosed Operators Station
  • Air Conditioning
  • Pressurizer
  • Dome Light
  • Radio Ready

Fast Fill System
  • Coolant
  • Engine
  • Fuel
  • Hydraulic
  • Transmission

Fire Extinguishers

Fire Suppression System

Fold Down Top Deck Handrails

Front Light Protectors

Heater, Air Conditioning

Oil Sample Adapters

Payload Control System (PCS)

Reflective Tape

Remote Control Systems
  • Proportional
  • Retrieval Attachment

Reversible Steering

Ride Control System

Seat Covers

Secondary Steering System

Service Tools

Tee Seat

A Commitment to the Mining Industry

As the demand for commodities grows, mining companies need a partner to support them in their efforts. Caterpillar is committed to being that partner.

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Mining Financial Services

Cat Financial is the single best resource for all your international mining finance needs, with capabilities to offer everything from leasing and general financing to project and structured financing.

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