307C SB^Non-Current

4M40-E1 Engine

The Mitsubishi Motors Corporation (MMC) 4M40-E1 Engine offers improved thermal efficiency with low fuel consumption and reduced low engine sound levels and vibration.

Cylinder Block

The cylinder block is cast iron for improved wear resistance. The upper part is laser hardened to reduce oil consumption and internal component wear.

Pistons

Heat resistant aluminum alloy pistons have a short compression height, reducing weight and improving efficiency. The piston ring set consists of three rings, which are treated for wear resistance.

Hydraulics

Cat hydraulics give the 307C exceptional efficiency and controllability unmatched in the industry for consistently high performance in all applications.

Low Fuel Consumption

The 4M40-E1 engine features low fuel consumption, improved thermal efficiency and reduced friction resistance between piston and liners.

Maintenance

To make daily maintenance easy, the oil level gauge, oil filter, fuel filter and priming pump are located on the left side of the engine.

Crankshaft

For durability and high reliability the surface of the crankshaft journals and pins are induction hardened to reduce wear.

Cooling

A large diameter fan and full length, water-cooled engine cylinders, combined with excellent thermal efficiency, help prevent overheating, prolong engine life and ensure the ability to operate at high temperatures and under heavy loads.

Component Layout

The 307C hydraulic system was designed to provide a high level of efficiency. With all major components located close together, shorter tubes and lines are needed, resulting in less friction loss in the lines and reduced pressure drops.

Hydraulic Cross Sensing System

Improves productivity with faster implement speeds and quicker, stronger pivot turns.

Pilot System

Increased pilot hydraulic pressure provides better control to the front linkage, swing and travel operations.

Controllability

The hydraulic system offers precise control to the 307C, reducing operator fatigue and improving operator effectiveness and efficiency, which ultimately translates into enhanced performance.

Pump Flow

Pump flow decreases when controls are in neutral for reduced fuel consumption and sound.

Auxiliary Hydraulic Valve

The auxiliary hydraulic valve is standard on the 307C for use with optional hydraulic circuits.

Stackable Valves

Up to two additional control valves can be added to the main control valve of the 307C (only one of the 307C SB) to run additional tools.

Auxiliary Hydraulics

For further versatility, a dedicated hammer (single function), thumb (double function) and combined auxiliary hydraulics are offered on the 307C.

Hydraulic Cylinder Snubbers

Hydraulic cylinder snubbers at the rod-end of boom cylinders and both ends of stick cylinders cushion shocks, reduce sound and increase cylinder life.

Structures

Proven structural manufacturing techniques assure outstanding durability and service life from these important components.

Carbody Design and Track Roller Frames

X-shaped, box-section carbody provides excellent resistance to tortional bending. Robot-welded track roller frames are press-formed, pentagonal units to deliver exceptional strength and service life.

Robotic Welding

Precision robotic welding ensures quality, increases rigidity, reduces internal stresses and enhances durability.

Undercarriage

Durable Cat undercarriage absorbs stresses and provides excellent stability.

Rollers and Idlers

Sealed and lubricated track rollers, carrier rollers and idlers provide excellent service life, keeping the machine in the field longer.

Grease Lubricated Track

New grease lubricated seals protect the track link and deliver long track link pin and bushing inner wear life.

Travel Motors

Automatic speed selection enables the machine to automatically change up and down from high and low speeds in a smooth, controlled manner.

Track Shoes

Three triple grouser track shoes are available on the 307C. Rubber pads can be easily installed on all shoes to eliminate potential damage to paved road surfaces.

Idler Guard

An idler guard, which is integral to the track roller frame, is standard. This guard helps maintain track alignment while traveling or working on slopes.

Blades

Two optional blades are available to accommodate both track widths. Cutting edges on the blades are now replaceable and reversible. With the optional blades, the 307C can doze, backfill trenches, level working space and speed site cleanup.

Segment-type Rubber Track

Available as an attachment, the segment-type rubber track is available for use in urban areas. It helps prevent damage to concrete and other road surfaces.

Track Shoes

Rubber Pads

The 18" (450 mm) shoe has four holes for rubber pad installation. The rubber pads are attached to the track shoes, eliminating potential damage to paved road surfaces. The elasticity of the rubber pad minimizes noise and vibration during machine operation.

Front Linkage

Front linkage variations on the 307C allow the use of two booms, two sticks, and five buckets. Using these combinations improves the general-purpose versatility of the excavator by suiting it to a diverse range of applications. The 307C SB provides the versatility to meet the needs of any job.

Linkage Bearings

New bearing technology has extended the front linkage greasing intervals for all bearings except the bucket.

Buckets

High tensile strength steel is used in high-stress areas for excellent wear and shock resistance. The side plates are tapered to prevent contact of the bucket sidewalls during trenching operations. All buckets are general purpose, share a common side profile and have lifting eyes.

Redesigned Interior Layout

Redesigned cab layout emphasizes simplicity and ease of use. Right-hand wall and console provide easy access to all switches, dials and controls.

Monitor

New, compact monitor enhances viewing from the operator's seat while displaying a variety of easy to read and understand information.

Seat

A new seat with a two-tone color offers two types of cushions - soft and hard - for operator comfort. The reclining knob is located at the right-side of the seat for easier reclining adjustment.

Console

Redesigned consoles for simplicity and functionality. Both consoles have attached adjustable armrests.

Automatic Climate Control

Fully automatic climate control adjusts temperature and flow and determines which air outlet is best in each situation.

Travel Controls

A large rubber-covered footrest at the side of the travel pedals allows the foot to easily grip the pedal. The travel lever stroke and force have been enhanced to improve the 307C's fine controllability, making the machine easier to operate.

Boom Swing Control Pedal

The 307C boom swing control is actuated by the foot pedal, conveniently located to the right of the travel pedal.

Hydraulic Actuation Control Lever

For easy access, the larger hydraulic actuation control lever is attached to the cab floor.

Viewing

Window glass is affixed directly to the cab, eliminating window frames which interfere with the operator's viewing area. A larger right-side window also enhances viewing.

Upper Cab Door Window

The upper cab door window slides open, providing extra ventilation and allowing communication with people outside.

Cab Exterior

The cab is newly designed and enlarged using asymmetrical steel tubing for improved resistance to fatigue and vibration. Falling Object Guard System (FOGS) may be bolted directly to the cab.

Cab Mounts

The cab shell is attached to the frame with improved viscous mounts, reducing vibration and sound.

Wiper

The wiper is positioned on the right cab pillar, further improving the operator's viewing area.

Extended Service Interval

307C service and maintenance intervals have been extended to reduce machine service time and increase machine availability.

Ground-level Maintenance

All daily maintenance areas are situated where they can be easily reached from ground level.

Engine Inspection

The engine can be accessed from the upper structure or from under the machine. A steel wall separates the engine and pump compartments.

Engine Oil Filter

The 307C engine oil filter is mounted in the engine compartment for easy access from the ground.

Radiator and Pump Compartment

Opening the engine hood allows easy access to the engine radiator, engine oil cooler, pump and pilot filter. A reserve tank and drain cock are attached to the radiator to simplify maintenance.

Pump Compartment

Opening the engine hood allows ground-level access to the pump and pilot filter.

Fuel-Water Separator

The water separator has a primary fuel filter element and is located in the radiator compartment for easy access from the ground.

Air Filter

The 307C features a Cat radial seal for superior cleaning efficiency.

Grease Lubricated Track

Grease lubricated seals protect the track link and deliver long track link pin and bushing inner wear life.

Fan Guard

Engine radiator fan is completely enclosed by fine wire mesh, reducing the risk of an accident.

Anti-Skid

Anti-skid punched star plate covers the top of the storage box to prevent slipping during maintenance. The plate can be removed for cleaning.

DT Electrical Connectors

307C DT electrical connectors are water and vibration resistant, improving electrical system reliability.

Handrail and Step

Large handrails and steps assist operator in climbing on and off the machine.

Selection

Make detailed comparisons of the machines you are considering before you buy. What are the job requirements? What production is needed? What is the true cost of lost production? Your Cat dealer can give you precise answers to these questions.

Purchase

Look past initial price, look at the value the 307C offers. Consider the financing options available as well as day-to-day operating costs.

Operation

Improving operating techniques can boost your profits. Your Cat dealer has training literature and other ideas to help you increase productivity.

Maintenance

Repair option programs guarantee the cost of repairs up front. Diagnostic programs such as Scheduled Oil Sampling and Technical Analysis help you avoid unscheduled repairs.

Replacement

Repair, rebuild or replace? Your Cat dealer can help you evaluate the cost involved so you can make the right choice.

Product Support

You will find nearly all parts at our dealer parts counter. Cat dealers utilize a worldwide computer network to find in-stock parts to minimize machine down time. You will save money with remanufactured components.