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CAT 321 Excavator

By · CAT Excavator →

₹75 - 85 lakh ex-factory Thiruvallur, Tamil Nadu · GST included · Last updated: Jun 2026

GST included. Landed cost adds trailer transport to site, warranty, insurance & FOC (where applicable); non-standard configurations, attachments & accessories are priced separately — confirm with a quote.

Get Landed Price

The CAT 321 is an excavator from Caterpillar with 134 HP power and a 19300 kg operating weight. Full specifications, the current price and finance options are on this page.

  • Operating Weight: 19300 kg
  • Engine Power: 134 HP (100 kW) @ 2000 rpm
  • Capacity: 1.0 m³
  • Max Digging Depth: 5970 mm

The CAT 321 is a 21-ton hydraulic crawler excavator built for pipeline work, road foundations, and medium-scale earthmoving jobs across India. It is powered by a Cat C3.6 engine delivering 134 HP at 2,000 rpm. The electrohydraulic system works in sync with the engine, moving more material while burning less fuel per cycle. Weighing approximately 19,300 kg, this heavy-duty CAT excavator provides a stable digging platform on both firm and uneven ground. The maximum digging depth of 5,970 mm suits most foundation, trench, and utility excavation tasks. A bucket capacity of 1.0 m³ ensures steady material throughput per pass. Boom and stick regeneration circuits sharpen cycle times and lower fuel draw simultaneously. Eco mode cuts consumption further, lift and dig capacity remain fully intact. The X-structure lower frame spreads load evenly across the tracked undercarriage. Cat VisionLink telematics allow remote monitoring of fuel use, location, and maintenance alerts. The 370-litre fuel tank supports long shift operation without mid-day refuelling stops. A one-year warranty covers materials and workmanship through authorised Cat dealerships. The CAT 321 excavator price in India ranges between Rs. 75 to 85 lakh. This excavator from Caterpillar Construction Equipment is best suited for infrastructure contractors and site developers managing road, canal, and foundation projects.

CAT 321 Excavator
Medium (15-25 Ton)
CAT 21-ton Excavator
CAT 321 Medium (15-25 Ton)
CAT 321 Excavator Price
CAT 321 Excavator Specs
  • icon alt1
    Weight

    19300 kg

  • featIcon2 (1) alt
    Bucket

    1.0 m³

  • Digging Depth

    5970 mm

  • Engine

    Cat 134 HP

  • Warranty

    1 Year

  • Boom

    5700 mm

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Planning to buy the CAT 321 Excavator in India? Get the best price, EMI & finance options, and delivery timelines by submitting a quick enquiry.

Note: All images, features, specifications, and brochures on this website are sourced from official brand sites and public resources. Prices are indicative; please confirm the final quote with our team before you buy.

Note: All images, features, specifications, and brochures on this website are sourced from official brand sites and public resources. Prices are indicative; please confirm the final quote with our team before you buy.

Key Highlights of CAT 321

Engine Make

Cat C3.6

Fuel Tank

370 L

Engine Displacement

3.6 L

Under Carriage

4100 mm

Hydraulic System

315 L/min

Arm

2250 mm

Max Digging Reach

9150 mm

Fuel Consumption

14-28 L/hour

Overall Width

2800 mm

Overall Length

9570 mm

Bucket Digging Force

135 kN

Tailswing Radius

2830 mm

Track Shoe Width

600 mm

air-conditioner-alt
AC Cabin

Standard

GPS Tracking
GPS

Standard

Features of CAT 321

Delivering Excellent Fuel Efficiency

  • The Cat C3.6 engine and electrohydraulic system work in sync to help you move plenty of material while using less fuel.

  • Electro-hydraulic (EH) system eliminates the need for pilot lines and filter for improved response and enhanced savings.

  • Intelligent Engine Control Module (ECM) ensures smooth, precise operation in every pass.

  • Save fuel with Automatic Engine Control (AEC). It reduces engine speed when the machine is not under load to minimize fuel consumption.

  • Robust and easy-to-maintain fuel system filtration reduces risk of failure from contaminated fuel.

  • Boom and Stick regeneration circuits reduce fuel consumption while improving cycle times.

  • Protect hydraulic components in cold weather. The auto warm-up feature speeds hydraulic oil warming in cooler temperatures.

Built to Last

  • Reinforced Cat structures extend machine life in harsh working conditions.

  • Reliable and durable and built on classic, proven components.

  • Robotically welded booms and sticks ensure structural integrity.

  • Track guards and steep-angle design shed debris, reducing wear.

  • Choose between two robust undercarriage options: standard 4.1 m (13'5") or medium 4.25 m (13'11"), both built to withstand demanding conditions.

  • The single plane cooling package design reduces air resistance compared to the traditional two-plane design for better cooling performance and enhanced machine productivity.

  • Sloped track frame helps prevent mud and debris from accumulating in the track area.

  • High swing speed and proven Cat components keep you working longer.

Low Maintenance, More Uptime

  • Shared components simplify maintenance and improve parts availability.

  • Scheduled Oil Sampling (S·O·SSM) ports are on ground level, simplifying maintenance and allowing for quick, easy extraction of samples for fluid analysis.

  • Extended and synchronized service intervals save on maintenance costs.

  • Extended first engine oil change interval (500 hours), and maintenance-free batteries.

  • Maximize uptime and extended service intervals, thanks to advanced hydraulic oil filter design and no pilot and case drain filters.

  • Proven, high-efficiency radial seal engine air filter behind the cab. The machine constantly monitors the engine air filter and will notifyyou, via the monitor, when service is required.

  • The latest air intake filter with pre-cleaner has double the dust holding capacity of the previous air intake filter.

Safety First, Always

  • The latest cab provides excellent visibility from the operator’s seat. In addition, two standard mirrors help keep you aware of your surroundings.

  • Optional rearview camera enhances visibility behind the machine.

  • Optional front windshield guard helps protect the windshield from potential damage caused by rocks, flying debris, and other road materials.

  • Heavy-duty base frame and reinforced “X” car body conform to ISO 15818:2017 lifting and tie-down requirements.

  • Handrails and hand hold with a step on the undercarriage for easy access to the engine bay area. The handrails conform to ISO 2867:2011 requirements for added safety.

  • Anti-skid plating with countersunk bolts reduces the potential for slippage and trip hazards.

Simple to Operate

  • Start the engine with a push button.

  • The in-cab high-resolution 203 mm (8 in) touchscreen monitor is easy to use, intuitive, and user-friendly.

  • Continuously improved user interface allows for intuitive navigation, minimizing performance interruption with the easy-to-use touchscreen menu.

  • The machine’s electrohydraulic system allows accurate bucket control for maximum precision.

  • Optimized low-effort joystick controls reduce operator fatigue.

  • Customize joystick patterns and preferences; the machine remembers each operator's settings.

  • Auto hammer stop protects tools from overheating and wear.

Comfort That Keeps You Going

  • Ergonomically designed seat to improve operator’s comfort.

  • Sound suppression, seals, and viscous cab mounts decrease noise and vibration for a quieter work environment.

  • Excellent work site visibility from the cab enhances productivity and safety.

  • Adjustable seat with three suspension levels and ergonomic design.

  • Climate control, Bluetooth® connectivity, USB ports, and an intuitive interface enhance comfort.

  • Easy to access radio controls, engine throttle, wiper controls and Bluetooth phone pairing for operator convenience.

  • Bright seatbelts and a wide cab entry improve safety and usability.

Smart Fleet Management

  • VisionLinkTM wirelessly connects you to your equipment, giving you access to essential information you need to know to run your business. Gain valuable insight into how your machine or fleet is performing. Access data anywhere—desktop, tablet, or mobile device.

  • Available CVA (Customer Value Agreements) and EPP (Extended Protection Plans) help maximize uptime and reduce risk.

  • Cat dealers are second to none. From machine selection and purchase to maintenance support, operator training and rebuilds, Cat dealers have the experience and capabilities to help keep you up and running at peak performance.

Are you interested in buying CAT 321 Excavator

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    Specifications of CAT 321

    ENGINE

    • Model

      Cat C3.6

    • Fuel

      Diesel

    • Rated Engine Power

      134 HP (100 kW) @ 2000 rpm

    • Piston Displacement

      3.6 L

    UNDERCARRIAGE

    • Track Shoe Width

      600 mm

    • Track Tensioning

      Grease

    • Gradeability

      35°

    HYDRAULIC SYSTEM

    • Maximum Flow

      315 L/min

    • Implement Circuit

      35 MPa

    • Swing Circuit

      25 MPa

    • Travel Circuit

      35 MPa

    SERVICE CAPACITIES

    • Fuel Tank

      370 L

    • Engine Coolant

      22 L

    • Engine Oil

      11 L

    • Hydraulic System

      218 L

    MACHINE WEIGHTS

    • Operating Weight

      19300 kg

    WORKING RANGE

    • Boom Length

      5700 mm

    • Arm Length

      2250 mm

    • Max. Digging Reach

      9150 mm

    • Max. Digging Reach on Ground

      9150 mm

    • Max. Digging Depth

      5970 mm

    • Max. Digging Height

      9120 mm

    • Max. Dumping Height

      6250 mm

    • Max. Vertical Wallcut Depth

      5360 mm

    • Bucket Digging Force

      135 kN

    • Arm Digging Force

      119 kN

    • Swing Speed

      10 rpm

    BUCKET

    • Bucket Capacity

      1.0 m³

    STATIC DIMENSIONS

    • Overall Length

      9570 mm

    • Overall Width

      2800 mm

    • Overall Height

      3250 mm

    • Overall Height of Cab

      3250 mm

    • Track Length on Ground

      3270 mm

    • Undercarriage Overall Length

      4100 mm

    • Tailswing Radius

      2830 mm

    • Min. Ground Clearance

      430 mm

    • Track Gauge

      2200 mm

    • Counterweight Clearence

      1020 mm

    • Track Shoe Width

      600 mm

    Why Choose CAT 321

    • Here is a number that stops most engineers mid-sentence: 1969 Nm of torque from a 3.6 litre engine. For context, almost every other 20 ton excavator in India runs a 5.8 to 7 litre engine to produce similar or even less torque. CAT squeezed that force out of an engine barely half the size.
    • What does that mean on site? The machine digs with the same bite as a bigger-engined excavator, but burns less diesel doing it. A smaller engine that works less hard also runs cooler and quieter — easier on the ears during a 10-hour shift, and easier on maintenance bills over the years.
    • At 19.3 tonne, the CAT 321 is also one of the lighter machines in this segment. Lighter means easier transport between sites on a low-bed trailer, and less ground pressure on soft stretches. The 1.0 m³ bucket and 9.15 m reach are well matched for loading 16 to 25 tonne Indian tippers. AC cab, GPS and a 370 L fuel tank are all standard — no hidden extras.
    Common Questions

    FAQs about CAT 321

    What is the CAT 321 Excavator price in India?

    The CAT 321 Excavator price in India ranges from ₹75 – 85 lakh. The final price may vary based on location, dealer quotation, attachment configuration, and applicable taxes.

    Where can I buy a CAT 321 excavator?

    You can buy the CAT 321 excavator from Desi Machines, your trusted platform for heavy equipment purchases. We negotiate with the brand’s authorised channel for you and bring you the best available offer for your location, on a genuine machine. Simply fill out the inquiry form for the excavator you need, or contact us directly for expert assistance and competitive pricing.

    Does the CAT 321 Excavator come with financing and insurance options?

    Yes, the CAT 321 comes with financing and insurance options. Desi Machines offers the best-curated finance and insurance solutions from top providers. Simply fill out the form for the excavator, and our team will help you secure the best deals.

    What is the operating weight of the CAT 321 excavator?

    The operating weight of the CAT 321 excavator is approximately 19300 kg. The operating weight may vary slightly depending on specific configurations and attachments.

    What type of engine is used in the CAT 321 excavator?

    The CAT 321 excavator is powered by a Cat C3.6 engine, delivering 134 HP (100 kW) @ 2000 rpm .

    What is the maximum digging depth of the CAT 321 excavator?

    The CAT 321 excavator has a maximum digging depth of 5970 mm, providing efficient excavation for various applications. The actual digging depth may vary based on optional attachments and configurations, ensuring versatility for different job site needs.

    What is the bucket capacity of the CAT 321 Excavator?

    The bucket capacity of the CAT 321 Excavator is 1.0 cubic meters (m³).

    What is the warranty period for the CAT 321 excavator?

    The CAT 321 Excavator in India typically comes with a standard warranty of 1 Year. This warranty generally covers defects due to faulty materials or workmanship. Warranty terms can vary. For the latest confirmed details, check with our team.

    Where can I find spare parts for the CAT 321 excavator?

    You can find genuine spare parts for the CAT 321 excavator at authorized CAT dealerships, service centers, and trusted suppliers. At Desi Machines, our team negotiates with the brand’s authorised channel for you and brings you the best available offer for your location. Fill out the form now to get the best offers on excavator spare parts.

    What is the fuel tank capacity of the CAT 321 Excavator?

    The CAT 321 excavator has a 370 litres diesel fuel tank, providing extended operation time without frequent refueling.

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    CAT 321 EMI Calculator

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    Loan after down payment: ₹60.00 L
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    Disclaimer: EMI is calculated based on the starting price with a default 20% down payment, 8.5% interest rate, and 5-year tenure. Interest rates typically range from 8.5% to 17%. Users can manually adjust the down payment, interest rate, and tenure to estimate different EMI options. Final loan terms, interest rate, down payment, and eligibility are subject to buyer profile and bank/NBFC approval. EMI shown is indicative only.

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    About CAT

    With a strong dealer network and robust after-sales support, Caterpillar India focuses on customer-centric solutions. Its equipment has ergonomic designs, modern safety measures, and telematics for real-time monitoring, which helps in infrastructure growth and sustainability in India.

    With a solid vendor organization and robust after-sales support, Cat Machines India centers around a client-driven approach. Its equipment focuses on ergonomic designs, advanced safety measures, and telematics for real-time monitoring, driving infrastructure growth and sustainability in India.

    Product Portfolio: Excavators, Backhoe Loaders, Motor Graders, Wheel Loaders , Skid Steer Loaders

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    Learn before you buy

    Excavator buying guides

    Plain-English guides on specs, sizing and total cost — written by people who know machines.

    All excavator guides →
    Excavator Overheating in India: Causes, Checks and How to Prevent It Guide Excavator Overheating in India: Causes, Checks and How to Prevent It Read guide → Excavator Travel Speed in India: How Fast a Crawler Moves Guide Excavator Travel Speed in India: How Fast a Crawler Moves Read guide → Excavator Digging Reach in India: How Far It Reaches by Size Class Guide Excavator Digging Reach in India: How Far It Reaches by Size Class Read guide → Excavator Dumping Height in India: Will It Load Your Tipper? Guide Excavator Dumping Height in India: Will It Load Your Tipper? Read guide →

    CAT 321 - Price & Availability Across 600+ Locations in India

    CAT 321 is available for purchase and enquiry across all major cities in India including Mumbai, Pune, Kolkata, Hyderabad, Chennai, Bengaluru, Delhi, Ahmedabad, Indore, Jaipur, Guwahati, and 600+ more locations.

    Maharashtra
    26 cities

    • Mumbai

    • Pune

    • Nagpur

    • Navi Mumbai

    • Thane

    • Nashik

    • Aurangabad (Chhatrapati Sambhajinagar)

    • Solapur

    • Kolhapur

    • Amravati

    • Chandrapur

    • Yavatmal

    • Latur

    • Dhule

    • Ahmednagar

    • Jalgaon

    • Raigad

    • Beed

    • Wardha

    • Palghar

    • Sangli

    • Ratnagiri

    • Satara

    • Nanded

    • Akola

    • Buldhana

    Gujarat
    21 cities

    • Ahmedabad

    • Gandhinagar

    • Surat

    • Vadodara

    • Rajkot

    • Bhavnagar

    • Jamnagar

    • Mundra

    • Kutch

    • Vapi

    • Anand

    • Mehsana

    • Morbi

    • Surendranagar

    • Amreli

    • Bharuch

    • Navsari

    • Dahej

    • Alang

    • Dholera

    • Gandhidham

    Goa
    5 cities

    • Panaji

    • Vasco da Gama

    • Margao

    • Calangute

    • Mormugao

    Tamil Nadu
    21 cities

    • Chennai

    • Coimbatore

    • Madurai

    • Tiruchirappalli

    • Hosur

    • Salem

    • Tirunelveli

    • Vellore

    • Erode

    • Thoothukudi

    • Neyveli

    • Cuddalore

    • Virudhunagar

    • Dharmapuri

    • Krishnagiri

    • Thanjavur

    • Tiruppur

    • Kancheepuram

    • Ranipet

    • Chengalpattu

    • Kanyakumari

    Karnataka
    21 cities

    • Bengaluru

    • Mysuru

    • Hubballi-Dharwad

    • Belagavi

    • Mangaluru

    • Davanagere

    • Ballari

    • Hospet

    • Tumakuru

    • Shivamogga

    • Chitradurga

    • Raichur

    • Kolar

    • Hassan

    • Hoskote

    • Doddaballapura

    • Kalaburagi

    • Bidar

    • Koppal

    • Vijayapura

    • Chamarajanagar

    Andhra Pradesh
    20 cities

    • Visakhapatnam

    • Vijayawada

    • Amaravati

    • Guntur

    • Tirupati

    • Nellore

    • Kurnool

    • Kadapa

    • Anantapur

    • Rajahmundry

    • Kakinada

    • Eluru

    • Ongole

    • Srikakulam

    • Bheemunipatnam

    • Machilipatnam

    • Proddatur

    • Hindupur

    • Srikalahasti

    • Nandyal

    Telangana
    20 cities

    • Hyderabad

    • Warangal

    • Karimnagar

    • Nizamabad

    • Khammam

    • Maheshwaram

    • Sangareddy

    • Nalgonda

    • Adilabad

    • Suryapet

    • Siddipet

    • Ramagundam

    • Mancherial

    • Peddapalli

    • Bhadrachalam

    • Zaheerabad

    • Narayanpet

    • Vikarabad

    • Medak

    • Kothagudem

    Kerala
    20 cities

    • Thiruvananthapuram

    • Kochi

    • Kozhikode

    • Thrissur

    • Kollam

    • Palakkad

    • Malappuram

    • Alappuzha

    • Kannur

    • Kasaragod

    • Kottayam

    • Idukki

    • Wayanad

    • Pathanamthitta

    • Ernakulam

    • Aluva

    • Angamaly

    • Perumbavoor

    • Munnar

    • Ponnani

    Uttar Pradesh
    24 cities

    • Lucknow

    • Kanpur

    • Varanasi

    • Prayagraj

    • Noida

    • Ghaziabad

    • Meerut

    • Jhansi

    • Aligarh

    • Moradabad

    • Gorakhpur

    • Mathura

    • Bareilly

    • Saharanpur

    • Ayodhya

    • Mirzapur

    • Dadri

    • Muzaffarnagar

    • Deoria

    • Kushinagar

    • Ballia

    • Sonbhadra

    • Gonda

    • Etawah

    Rajasthan
    20 cities

    • Jaipur

    • Jodhpur

    • Udaipur

    • Kota

    • Ajmer

    • Bikaner

    • Alwar

    • Bhilwara

    • Barmer

    • Jaisalmer

    • Pali

    • Nagaur

    • Banswara

    • Dungarpur

    • Chittorgarh

    • Sikar

    • Sawai Madhopur

    • Tonk

    • Bundi

    • Sriganganagar

    Punjab
    20 cities

    • Ludhiana

    • Amritsar

    • Jalandhar

    • Patiala

    • Mohali

    • Bathinda

    • Hoshiarpur

    • Moga

    • Gurdaspur

    • Pathankot

    • Firozpur

    • Rupnagar

    • Fatehgarh Sahib

    • Sangrur

    • Faridkot

    • Kapurthala

    • Nawanshahr

    • Muktsar

    • Tarn Taran

    • Fazilka

    Haryana
    20 cities

    • Gurugram

    • Faridabad

    • Panipat

    • Ambala

    • Sonipat

    • Rohtak

    • Hisar

    • Karnal

    • Rewari

    • Manesar

    • Panchkula

    • Bhiwani

    • Yamunanagar

    • Jhajjar

    • Nuh (Mewat)

    • Sirsa

    • Kaithal

    • Kurukshetra

    • Bahadurgarh

    • Palwal

    Himachal Pradesh
    16 cities

    • Shimla

    • Manali

    • Dharamshala

    • Solan

    • Baddi

    • Mandi

    • Kullu

    • Bilaspur

    • Una

    • Chamba

    • Kangra

    • Rampur

    • Lahaul-Spiti

    • Hamirpur

    • Sirmaur

    • Kinnaur

    Uttarakhand
    20 cities

    • Dehradun

    • Haridwar

    • Rishikesh

    • Nainital

    • Roorkee

    • Haldwani

    • Kashipur

    • Rudrapur

    • Pantnagar

    • Champawat

    • Pithoragarh

    • Bageshwar

    • Chamoli

    • Uttarkashi

    • Almora

    • Vikasnagar

    • Kotdwar

    • Ramnagar

    • Srinagar (Pauri)

    • Tehri

    Delhi
    20 cities

    • Central Vista

    • Dwarka

    • Rohini

    • Narela

    • Okhla

    • Tughlakabad

    • Shahdara

    • Janakpuri

    • Badarpur

    • Uttam Nagar

    • Saket

    • Mundka

    • Burari

    • Bawana

    • Kanjhawala

    • Najafgarh

    • Deoli

    • Mehrauli

    • Vasant Kunj

    • Mayur Vihar

    Jammu & Kashmir
    20 cities

    • Srinagar

    • Jammu

    • Udhampur

    • Katra

    • Anantnag

    • Baramulla

    • Sopore

    • Pulwama

    • Ganderbal

    • Bandipora

    • Kupwara

    • Kathua

    • Reasi

    • Ramban

    • Doda

    • Rajouri

    • Poonch

    • Kishtwar

    • Shopian

    • Kulgam

    Ladakh
    12 cities

    • Leh

    • Kargil

    • Drass

    • Hanle

    • Chushul

    • Zanskar

    • Nubra

    • Shyok

    • Khaltse

    • Dha-Hanu

    • Nyoma

    • Mulbekh

    Chandigarh
    12 cities

    • Sector 17 (City Core)

    • Sector 62 (IT Park)

    • Industrial Area Ph-1

    • Industrial Area Ph-2

    • Manimajra

    • Panchkula Extension

    • Mohali Phase 8

    • ISBT 43

    • Daria

    • Hallomajra

    • Rock Garden Area

    • Sector 82 (Aerocity)

    West Bengal
    20 cities

    • Kolkata

    • Durgapur

    • Asansol

    • Haldia

    • Siliguri

    • Kharagpur

    • Bardhaman

    • Medinipur

    • Howrah

    • Raniganj

    • Burnpur

    • Bankura

    • Kalyani

    • Purulia

    • New Town (Rajarhat)

    • Bidhannagar

    • Barasat

    • Malda

    • Jalpaiguri

    • Cooch Behar

    Odisha
    20 cities

    • Bhubaneswar

    • Cuttack

    • Rourkela

    • Sambalpur

    • Berhampur

    • Angul

    • Talcher

    • Jharsuguda

    • Sundargarh

    • Paradip

    • Koraput

    • Rayagada

    • Keonjhar

    • Bolangir

    • Kalahandi

    • Dhenkanal

    • Baripada

    • Jajpur

    • Kendrapara

    • Puri

    Jharkhand
    20 cities

    • Ranchi

    • Jamshedpur

    • Dhanbad

    • Bokaro

    • Hazaribagh

    • Deoghar

    • Giridih

    • Ramgarh

    • Dumka

    • Lohardaga

    • Gumla

    • Palamu

    • Chatra

    • West Singhbhum

    • Pakur

    • Sahibganj

    • Koderma

    • Simdega

    • Godda

    • Khunti

    Add to Compare
    CAT 321 Excavator
    • CAT 321
    • Price:

      ₹75 - 85 lakh

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