Used CAT 306D Excavator 6 Ton Crawler Excavator for Sale

The Used CAT 306D Excavator is a compact crawler machine built for digging, trenching, loading, site preparation, landscaping, roadwork, and utility projects.

With an operating weight of about 5.8 to 6 tons, the CAT 306D gives contractors a useful balance between compact dimensions and practical digging performance. Its crawler undercarriage provides stable ground contact, while the hydraulic working system supports smooth boom, arm, bucket, and swing movements.

In addition, the machine shown has an enclosed cab, steel tracks, front dozer blade, and conventional boom arrangement. These features make it suitable for contractors, equipment rental fleets, machinery dealers, and overseas buyers looking for a versatile used excavator.

Practical 6-Ton Excavator for Daily Work

The CAT 306D sits in a useful size range for construction projects that need more capacity than a small mini excavator but still require easy transport and good maneuverability.

Reference specifications list an operating weight of about 5,775 kg, a standard bucket around 0.22 m³, and rated engine power of approximately 41 kW. Travel speed is commonly listed at about 2.8 km/h in low range and 4.8 km/h in high range.

As a result, the machine can move efficiently around a jobsite while still providing enough weight and hydraulic force for general earthmoving.

CAT 306D Technical Specifications

These figures are consistent with several CAT 306D used-equipment listings, although specifications can change with market, year, boom, stick, track, and bucket configuration.

Strong Digging Range

The CAT 306D offers a useful working range for foundation work, drainage trenches, utility installation, landscaping, and general excavation.

Its maximum digging depth is commonly listed at around 3,860 mm, while maximum ground reach is approximately 6,180 mm. Maximum digging height can reach about 5,740 mm, with a dumping height of roughly 4,060 mm.

Therefore, operators can dig below ground level, reach across trenches, and load soil into trucks without constantly repositioning the excavator.

0.22 m³ Bucket for General Excavation

The standard bucket size is approximately 0.22 m³.

This capacity works well for soil, sand, clay, gravel, and similar construction materials. It also suits projects where operators need a combination of cycle speed and digging capacity rather than an oversized bucket.

Depending on the hydraulic setup and coupler, buyers may also use trenching buckets, grading buckets, hydraulic breakers, or other compatible attachments.

Stable Steel Crawler Undercarriage

The machine shown uses a steel crawler undercarriage.

Crawler tracks spread the excavator's weight across the ground and improve stability on dirt, gravel, construction sites, and uneven surfaces. A track shoe width around 400 mm is commonly listed for the CAT 306D.

In addition, the front dozer blade can support leveling, backfilling, site cleanup, and machine stabilization during digging.

Enclosed Operator Cab

The enclosed cab provides wide front and side glass areas, helping the operator monitor the bucket, tracks, and surrounding work zone.

Hydraulic joystick controls are positioned beside the seat for convenient operation. The cab layout is simple and familiar, which helps operators move between different machines with less adjustment time.

For long shifts, an enclosed cab can also provide better protection from dust, wind, and changing weather conditions.

Easy Access for Daily Maintenance

The rear engine hood opens widely, giving technicians direct access to major service areas.

This layout helps simplify routine checks for engine oil, coolant, filters, belts, hydraulic components, and other service points. Easier maintenance access can reduce the time required for daily inspections and scheduled service.

The exposed condition of hoses, cylinders, tracks, rollers, sprockets, bucket pins, boom joints, and engine components should still be checked carefully when buying any used machine.

Suitable Applications

The Used CAT 306D is suitable for foundation excavation, trenching, drainage work, road construction, landscaping, farm projects, municipal engineering, utility installation, loading, site preparation, backfilling, and general earthmoving.

Its size is especially useful for contractors who need a crawler excavator that remains relatively compact while offering more digging force and reach than smaller mini excavators.

Used Machine Inspection and Supply

For used construction equipment, actual condition is just as important as model specification.

Before delivery, the machine can be checked for engine operation, hydraulic response, boom and arm movement, bucket condition, cylinder leakage, swing performance, travel function, track wear, rollers, sprockets, cab condition, and electrical systems.

Buyers should also confirm the machine year, serial number, working hours, engine plate, attachments, and final configuration for the exact unit ordered.

FAQ

What is the operating weight of the CAT 306D?

Most reference listings place the machine at about 5,775 to 6,000 kg, depending on configuration.

What is the standard bucket capacity?

The commonly listed standard bucket is approximately 0.22–0.23 m³.

How deep can a CAT 306D dig?

Reference specifications show a maximum digging depth of approximately 3.8–3.86 m.

How much engine power does it have?

Typical listings specify approximately 41 kW, or about 55 HP.

Does the CAT 306D have a dozer blade?

Yes. The unit shown in the photos is equipped with a front dozer blade.

Is it suitable for road and utility projects?

Yes. Its compact size, crawler undercarriage, digging range, and dozer blade make it suitable for roadwork, trenches, utilities, landscaping, and general construction.

Can attachments be installed?

Yes, depending on the hydraulic circuit, coupler type, attachment weight, and machine configuration.

What should be checked before purchasing?

Buyers should verify working hours, serial number, engine condition, hydraulic performance, undercarriage wear, bucket and boom condition, cylinders, cab, and actual attachments.