Cat

Cat 320 Medium excavators

100K+ machines in details.

Cat 320 Medium excavators tech specs

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Interior [2]

Exterior [4]

Attachments [2]

2017-2025

21,200 kg Operating weight

7.34 m Max dump height

5.7 m Boom length

6,720 mm Max digging depth

9,890 mm Max digging reach

110 kw Gross power

The Cat 320 brings serious power and smart tech into a 21.2 t (46,700 lb) package. It digs deep, hauls heavy, and keeps operators fresh with a comfort-oriented cab and factory-grade assist systems.

Cat Grade 2D/Assist and payload onboard

Ground-level maintenance and long filter life

110 kW (150 hp) C7.1 power in a 21.2 t frame

1.4 m³ bucket soaks up more material per swing

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Makana rating

Owner rating

| 2

Market average

AED 192,000

Starting from

AED 145,000

Cat 320 Technical specifications

General

Engine model

Cat C7.1

Operating weight

21,200 kg

Max dump height

7.34 m

Boom length

5.7 m

Gradeability

70 %

Bucket width

1,350 mm

Bucket capacity

1.4 m3

Max speed forward

5.5 kph

Max digging depth

6720 mm

Max digging reach

9890 mm

Engine

Displacement

7100 cm3

Gross power

110 kw

Operational specifications

Swing speed

10.9 rpm

Arm crowding force

106 kN

Refill capacities

Engine oil cap

15 liter

Undercarriage

Drawbar Pull

178 kN

Track width

600 mm

Attachments

Bucket digging force

133 kN

Dimensions

Height - top of cab

3.05 m

Hydraulic system

Pump flow cap

259 lpm

Relief valve pressure

329.98 bar

Service refill capacities

Fuel cap

410 liter

Hydraulic fluid cap

170 liter

Download datasheets

OEM product brochure

Cat 320 expert review

Reviewed by on

Overview

The Cat 320 is a 21.2 t (46,700 lb) next-gen excavator powered by a 110.5 kW (150 hp) Cat C7.1 engine. It delivers up to 6.72 m (22 ft) digging depth and 1.4 m³ (1.8 yd³) bucket capacity.

Pros Heavy-duty bucket volume delivers strong dig output.
Full factory tech (Grade Assist, payload, UI) reduces setup and rework.

Cons At 21.2 t, needs stable ground and transport setup.
Built-in tech requires operator training to get full value.

Performance & Efficiency

Main hydraulics at 429 L/min and up to 5,500 psi pressure deliver high dig force and control. Fuel use is cut by ~25%, and maintenance cost drops up to ~15% versus older models.

In Comparison

Compared to the PC300, you gain full tech and more power for not much more weight. Against the 323, it’s lighter, easier to move, and more cost-effective.

Verdict

The Cat 320 hits the utility-productivity-tech sweet spot. Perfect for high-production digging and grading. Skip it if your work is ultra-compact or you want the simplest rig.