CAT 321 Excavator

By Caterpillar · CAT Excavator →

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.

Medium (15-25 Ton)

Medium (15-25 Ton)

Medium (15-25 Ton)

Medium (15-25 Ton)

Weight
19300 kg
Bucket
1.0 m³
Digging Depth
5970 mm
Engine
Cat 134 HP
Warranty
1 Year
Boom
5700 mm

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Ex-Showroom Price
₹75 - 85 lakh
EMI Starts
₹123,099/ Month
Insurance
Check Availability

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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.

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Note: All images, features, specifications, and brochures on this website are sourced from official brand sites and public resources. Prices are indicative; please confirm exact pricing with the dealer or OEM.

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

AC Cabin

Standard

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

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 connect you with authorized dealers based on your location to ensure you get the best deals and genuine products. 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 most accurate and up-to-date information, please verify with authorized dealers or the official brand website.

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, we help you connect with authorized dealers, and our experts assist you in finding the best deals based on 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

Down Payment ₹15 L

₹

₹15.00 L₹75.00 L

Loan after down payment: ₹60.00 L

Loan Amount ₹60.00 L

₹

₹0 L₹60.00 L

Annual Interest Rate 8.5%

1%30%

Loan Tenure 5 Years

Yrs

1 Yr5 Yrs

Monthly EMI

₹

Principal Amount

₹L

Total Interest

₹L

Total Amount

₹L

Principal vs Interest

Principal: 48% Interest: 52%

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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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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.

West (3)
South (5)
North (10)
East (3)

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

CAT 321 Excavator

Key Highlights of CAT 321

Features of CAT 321

Delivering Excellent Fuel Efficiency

Built to Last

Low Maintenance, More Uptime

Safety First, Always

Simple to Operate

Comfort That Keeps You Going

Smart Fleet Management

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Specifications of CAT 321

ENGINE

UNDERCARRIAGE

HYDRAULIC SYSTEM

SERVICE CAPACITIES

MACHINE WEIGHTS

WORKING RANGE

BUCKET

STATIC DIMENSIONS

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