R2900G Underground Mining Loader

Compact design, high engine power, higher torque rise, stronger components and excellent maneuverability ensures the R2900G is a solid performer.

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.

Cat C15 Engine with ACERT Technology



The Cat C15 engine with ACERT Technology is U.S. EPA Tier 3 and EU Stage III compliant. It features efficient fuel management for quick response, high productivity and exceptional service life. A new, sculptured cylinder block provides greater strength and lighter weight.

High Torque Rise



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.

Radiator



Modular radiator with swingout grill provides easy access for cleaning or repair. Built in sight gauge allows for quick, safe coolant level checks.

Pistons



Oil cooled pistons increase heat dissipation and promote longer piston life.

ADEM IV System



Controls the fuel injector solenoids to monitor fuel injection. This system provides automatic altitude compensation, air filter restriction indication and it will not allow the engine to fire until it has oil pressure, acting as cold start protection and a form of prelube.

Turbocharged and Aftercooled



Airtoair aftercooling provides improved fuel economy by packing cooler, denser air into cylinders for more complete combustion of fuel and lower emissions. The turbocharger enhances performance and efficiency.

Mechanically Actuated, Electronic Unit Injection MEUI



Proven highpressure, direct injection fuel system electronically monitors operator demands and sensor inputs to optimize engine performance.

Cylinder Liners



Fulllength watercooled cylinder liners provide maximum heat transfer.

Crankshaft



The crankshaft is forged and induction hardened for longterm durability.

Power Train Transmission



Designed for durability, the Cat power shift transmission delivers smooth, responsive performance and reliability in tough conditions.

Power Shift Transmission



The Cat fourspeed planetary power shift transmission is matched with the C15 engine with ACERT Technology to deliver constant power over a wide range of operating speeds. ulli Hydraulic modulation cushions the shift and reduces stress on components.lili High contact pump drive and output transfer gears are used to reduce sound levels.lili Pump drive and output transfer use high contact gear ratios to reduce sound levels.lili Perimeter mounted, large diameter clutch packs control inertia for smooth shifting and increased component life.liul

Robust Design



Designed for rugged underground mining conditions, the proven planetary power shift transmission is built for long life between overhauls.

Electronic Controls



Electronic controls allow smooth, onthego shifting for greater productivity.

Torque Converter



High capacity torque converter delivers more power to the wheels for superior power train efficiency.

Electronic Autoshift Transmission



The electronic autoshift transmission increases operator efficiencies and optimizes machine performance. The operator can choose between manual or auto shift modes.

Transmission Neutralizer



Using the left brake pedal, the operator can engage the service brakes and neutralize the transmission, maintaining high engine rpm for full hydraulic flow, enhancing digging and loading functions.

Final Drives



Cat final drives work as a system with the planetary power shift transmission to deliver maximum power to the ground. Built to withstand the forces of high torque and impact loads, final drives provide high torque multiplication to further reduce drive train stress.

Axles



Heavy duty axles are built rugged for longlife in the most demanding environments.

Oscillating Rear Axle



Oscillating rear axle ensures fourwheel ground contact for maximum traction and stability at all times.

Differential



No spin rear differential reduces tire wear and maximizes traction in uneven terrain.

DuoCone Seals



DuoCone seals between the axle spindle and housings keep lubrication in and contaminants out.

Brakes



Fully enclosed oil immersed disc brakes incorporate independent service and parking brake pistons. Hydraulic actuated independent circuits provide improved performance and reliability.

Service Brakes



Selfadjusting, fluid applied, spring released service brakes feature modulated engagement. Independent front and rear circuits use separate brake accumulators for greater performance.

Parking Brake



Selfadjusting, Spring Applied Fluid Released SAFR parking brake is applied by a spring force when fluid pressure is released. An independent piston acts directly on the inboard axle mounted brake disc on each wheel.

Cat Electronic Technician



Cat ET service tool provides service technicians with easy access to stored diagnostic data through the Cat Data Link to simplify problem diagnosis and increase availability.

Diagnostic Capability



Critical data from the transmission controls provide service technicians with enhanced diagnostic capability to reduce downtime and operating costs.

Hydraulics



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

Hydraulic System



Powerful Cat hydraulics deliver exceptional digging and lifting forces for fast cycle times.

Lift and Tilt System



High hydraulic flow rates provide fast hydraulic cylinder response and powerful lift forces. Largebore lift and tilt cylinder delivers exceptional strength, performance and durability.

Pilot Controls



Low effort, pilot operated joystick implement control with simultaneous lift and tilt functions optimizes operating efficiency.

Optional Ride Control



The optional ride control system uses a nitrogen filled oil accumulator in the hydraulic lift circuit to act as a shock absorber for the bucket and lift arms. The lift arm and bucket response to movement is dampened over rough ground, reducing fore and aft pitch, improving cycle times and load retention. A smoother, more comfortable ride gives operators the confidence to travel at speeds above 5 kmh 3 mph during load and carry operations.

Cat Hydraulic Hose



Field proven Cat high pressure XT hydraulic hoses are exceptionally strong and flexible for maximum system reliability and long life in the most demanding conditions. Reusable couplings with Oring face seals provide superior, leak free performance and prolong hose assembly life.

Structures



Designed for maximum strength and durability in the harshest operating environments.

Frame Design



The frame features robust structural components for outstanding durability in the toughest loading conditions. Caterpillar integrates advanced processes in the design and manufacture of Cat frames and structures. Computer modeling and Finite Element Analysis FEA are used extensively throughout design.

Steel Frame



Strong steel frame structures are designed to resist twisting forces, torsional shock and stresses generated during the loading cycle while protecting drive line and hydraulic system components.

Lift Arms



Solid steel lift arms absorb high stresses generated during loading without sacrificing strength or durability. The linkage design offers excellent reach and dump clearance for better productivity. Lift arm support pins prevent lowering the lift arms during service and maintenance.

Loader Tower



The four plate loader tower provides a solid mount for lift arms, lift cylinders and Zbar tilt lever. The loader frame is designed and built to absorb twisting, impact and high loading forces.

CastSteel Cross Tube



The cast steel cross tube provides excellent resistance to torsion and impact loads, keeping pin bores aligned and extending component service life.

ZBar Loader Linkage



Proven ZBar loader linkage geometry generates powerful breakout force and an increased rack back angle for better bucket loading and material retention.

Sealed Pins



Sealed colleted pins are fitted to all bucket and lift arm hinge points for longer pin and bushing life. This reduces maintenance costs and extends service intervals. The sealed joints retain lubrication and prevent contaminant entry.

Hitch



Spread hitch design widens the distance between upper and lower hitch plates to distribute forces and increase bearing life. Thicker hitch plates reduce deflection. The wide opening provides easy service access. Upper and lower hitch pins pivot on roller bearings to distribute horizontal and vertical loads over a greater surface area. Shim adjusted preload reduces maintenance time. An onboard steering frame lock pin is fitted to prevent articulation during maintenance and service.

Operator Station



Setting a new industry standard for comfort and efficiency.

Ergonomic Layout



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.

Pilot Controls



Loweffort pilot operated joystick controls integrate steering, transmission and implement functions for smoother, faster cycles with less operator fatigue.

Electronic Autoshift



Allows the operator to choose automatic or manual shifting. In auto mode, the operator uses a dash mounted switch to select the highest gear they wish the machine to shift to. In this mode, the transmission shifts at factory preset shift points so that each shift occurs at optimum torque and ground speed for maximum machine performance.

DualPedal Braking



Dual brake pedals function as a brake and a transmission neutralizer so the operator can maintain high engine rpm for full hydraulic flow and fast cycle times.

Protective Structure



Integral to the cab and frame, the Rollover Protective Structure ROPS is resiliently mounted to the frame to isolate the operator from vibration for a more comfortable ride.

Suspension Seat



Suspension seat provides optimal driving position and enhances operator comfort, all shift long.

STIC Steering Control



STIC combines directional selection, gear selection and steering into a single lever for maximum responsiveness. Simple sidetoside motion turns machine right or left. Transmission shifting forwardneutralreverse is controlled using a three position rocker switch. The thumb operated upshift and downshift button controls manual shifting.

Optional Enclosed Cab



Optional soundsuppressed ROPS cab provides a quiet, secure working environment. Large window openings offer excellent visibility in all directions. Enclosed design provides fresh, pressurized, temperaturecontrolled air circulation with airconditioned comfort and a more comfortable working environment.

Optional Ride Control



The system uses a nitrogen filled oil accumulator in the hydraulic lift circuit to act as a shock absorber for the bucket and lift arms. The lift arm bucket response to movement is dampened over rough ground, reducing fore and aft pitch, improving cycle times and load retention. A smoother, more comfortable ride gives operators the confidence to travel at higher speeds during load and carry applications.

Monitoring System



Caterpillar Electronic Monitoring System 40CEMS41 continuously provides critical machine data to keep the machine performing at top production levels. A warning system alerts the operator of immediate or impending problems with engine oil pressure, parking brake engagement, brake oil pressure, electrical system, low fuel, hydraulic oil temperature, coolant leveltemperature, transmission oil temperature and impending brake application.

Message Center



Threecategory warning system alerts operator of abnormal machine health conditions.

Gauge Cluster



Maintains a constant display of vital machine functions, including engine coolant temperature, brake oil temperature, air system pressure and fuel level.

SpeedometerTachometer Module



Monitors three systems engine speed, ground speed and gear indicator.

Buckets



Cat buckets provide the flexibility to match the machine to the material and conditions.

Buckets



Aggressive Cat bucket designs deliver unmatched productivity in the most demanding applications. Underground mining buckets are designed for optimal loadability and structural reliability to increase productivity and help lower your costperton.

Bucket Selection



Cat underground loader buckets are available in standard and penetration configurations to meet a range of loading, hauling and dumping conditions.

Bucket Capacities



Buckets are available in a range of sizes and capacities to suit most material types and densities.

Wear Packages



Weldon wear plates in high wear areas are standard. Additional wear packages are available, including sacrificial wear strips and Cat heel shrouds, protect the edges from damage for longer bucket life and reduce the need for costly bucket rebuilds.

Cutting Edges



Cat half arrow and cast half arrow cutting edges extend bucket life in high wear applications.

Serviceability



Less time spent on maintenance means more time being productive.

Service Access



Easy access to daily service points simplifies servicing and reduces time spent on regular maintenance procedures.

GroundLevel Access



Allows convenient servicing to all tanks, air filters, lubrication points and compartment drains.

Air Filters



Radial seal air filters are easy to change, reducing time required for air filter maintenance.

Sight Gauges



Makes fluid levels checks quick and easy.

Diagnostics



Cat Electronic Technician Cat ET Service Tool enables quick electronic diagnosis of machine performance and key diagnostic data for effective maintenance and repairs.

Sealed Electrical Connectors



Electrical connectors are sealed to lock out dust and moisture. Harnesses are externally sealed with flame resistant sleevescovers for protection. Wires are color and number coded for easy diagnosis and repair.

Scheduled Oil Sampling



SOSSM sampling valves speed sampling and analysis reliability.

Customer Support



Caterpillar dealers have what it takes to keep mining underground equipment productive.

Commitment Makes the Difference



Cat dealers offer a wide range of solutions, services and products that help you lower costs, enhance productivity and manage your operation more efficiently. Support goes far beyond parts and service. From the time you select a piece of Cat equipment until the day you rebuild, trade or sell it, the support you get from your Cat dealer makes the difference that counts.

Dealer Capability



Cat dealers will provide the level of support you need, on a global scale. Dealer expert technicians have the knowledge, experience, training and tooling necessary to handle your repair and maintenance needs, when and where you need them.

Product Support



Cat dealers believe superior products deserve superior support. When Cat products reach the field, they are supported by a worldwide network of parts distribution facilities, dealer service centers, and technical training facilities to keep your equipment up and running. Cat customers rely on prompt, dependable parts availability and expertise through our global dealer network, ready to meet your needs 247.

Service Support



Every piece of Cat equipment is designed and built to provide maximum productivity and operating economy throughout its working life. Cat dealers offer a wide range of service plans that will maximize uptime and return on your investment, including ulli Preventive Maintenance Programs lili Diagnostic Programs, such as Scheduled Oil Sampling and Technical Analysis lili Rebuild and Reman Options lili Customer Support Agreementsliul

Technology Products



Cat dealers offer a range of advanced technology products designed to improve fleet efficiency, increase productivity, and lower costs.

www.cat.com



For more complete information on Cat products, dealer services, and industry solutions, visit us on the web at www.cat.com.

Operation



With todays complex products, equipment operators must have a thorough understanding of machine systems and operating techniques to maximize efficiency and profitability. Your Cat dealer can arrange training programs to help operators improve productivity, decrease downtime, reduce operating costs, enhance safety, and improve return on the investment you make in Cat products.

Safety



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

Product Safety



Caterpillar has been and continues to be proactive in developing mining machines that meet or exceed safety standards. Safety is an integral part of all machine and systems designs.

Engine Shut Off Switch



A secondary engine shutoff switch is located at ground level.

Integral ROPS Cab



Integral to the cab and frame, the ROPS is resiliently mounted to the frame to isolate the operator from vibration for a more comfortable ride.

Brake Systems



Four corner oilcooled braking system provides excellent control. The service brakes system is actuated by modulated hydraulic pressure, while the parking break function is spring applied and hydraulic released. This system assures braking in the event of loss of hydraulic failure.

Standard Safety Features



ulli Antiskid upper deck surfaceslili Lower cab lightlili Ground level compartment sight glasseslili Increased visibilitylili 3point access to cab and machinelili Push out safety glasslili Suspension seatlili Inertia reel retractable seat beltlili Bucket control group safety pinslili Hot and cold side of enginelili Articulation locklili Hinged belly guardsliul


Engine
Engine Model
Cat® C15 ACERT™
Rated Power
1900 RPM
Gross Power - SAE J1995
430 hp
Flywheel Power
308 hp
Net Power - SAE J1349
389 hp
Net Power - ISO 9249
386 hp
Net Power - 80/1269/EEC
430 hp
Bore
5.4 in
Stroke
6.8 in
Displacement
927.9 in3

Operating Specifications
Nominal Payload Capacity
37926 lb
Gross Machine Operating Weight
148611 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

Weights
Empty
110692 lb
Front Axle
110716 lb
Rear Axle
37895 lb
Loaded
148611 lb

Bucket Capacities
Bucket Capacity - Std.
9.4 yd3
Bucket Width (Over cutting edge)
124.2 in
Bucket Capacity - Optional
11.6 yd3

Hydraulic Cycle Time
Raise
9.2 Seconds
Dump
3.4 Seconds
Lower, empty, float down
3.1 Seconds
Total Cycle Time
15.7 Seconds

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

Transmission
Forward 1
3.1 mph
Forward 2
5.5 mph
Forward 3
9.4 mph
Forward 4
15.7 mph
Reverse 1
3.9 mph
Reverse 2
6.8 mph
Reverse 3
11.6 mph
Reverse 4
16.4 mph

Dimensions
Overall Tire Width
114.1 in
Overall Width
124.2 in
Tunnel Clearance Width
177.2 in
Height to Top of ROPS
113.6 in
Height to Top of Hood
93.3 in
Overall Height - Bucket Raised
243.3 in
Bucket Pin Height at Max Lift
178.7 in
Dump Clearance at Max Lift
243.3 in
Overall Length (Tramming)
431.1 in
Ground Clearance
18.3 in
Wheelbase
148.8 in
Dump Angle at Max Lift
42 Degrees
Maximum Dump Height
213.7 in
Centerline of Front Axle to Centerline of Hitch
74.4 in
Centerline of Back Axle to Centerline of Hitch
74.4 in
Length - Rear Axle to Bumper
140.6 in
Overall Length (Digging)
445 in
Digging Depth
2 in.
Tunnel Clearance Height
157.5 in.

Service Refill Capacities
Rear Differential and Final Drives
33.5 gal
Fuel Tank
225.6 gal
Cooling System
19.8 gal
Hydraulic Tank
37 gal
Transmission
16.4 gal
Front Differential and Final Drives
31.4 gal
Engine Crankcase with Filter
9 gal