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340 UHD Ultra High Demolition Hydraulic Excavator

340 UHD Ultra High Demolition Hydraulic Excavator

The Cat® 340 UHD provides optimum machine solutions for building demolition up to 8 stories. With its unique coupling system, you can switch between two lengths of Ultra High Demolition fronts and two types of Retrofit booms and sticks with no special tools in 15 minutes. You simply won’t find a better 50-ton class choice for demolition..

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Operating Weight122600lb

Note (1)Hydraulic Variable Gauge undercarriage, 22 m (72'2") UHD front, 600 mm (24") Heavy Duty (HD) triple grouser shoes and 9.0 mt (19,842 lb) counterweight. No work tool.

Machine Weight - Retrofit Configuration118600lb

Note (2)Hydraulic Variable Gauge undercarriage, Retrofit boom, R3.2DB (10'6") stick, General Duty (GD) 2.27 m³ (2.97 yd³) bucket, 600 mm (24") HD triple grouser shoes and 9.0 mt (19,842 lb) counterweight.

UHD in Cradle18700lb

Retrofit Boom in Cradle - R3.9 DB Stick13710lb

Retrofit Boom in Cradle - R3.2 DB Stick13340lb

Retrofit Boom in Cradle - R2.8 DB Stick13120lb

2-piece Retrofit boom in cradle - R3.2 DB stick17440lb

Maximum Pin Height at Stick Nose72.2ft

Maximum Weight at Stick Nose8160lb

Maximum Working Pin Height at Stick Nose - 1/261ft

Maximum Working Reach at Stick Nose - 1/238.4ft

Maximum Height at Stick Nose in Max Reach Position41.5ft

Maximum Reach at Stick Nose44.4ft

Note (1)22 m (72' 2") UHD Front (Over-the-Front)

Engine ModelCat C9.3B

Net Power - ISO 9249346HP

Engine Power - ISO 14396 (DIN)351hp (metric)

Net Power - ISO 9249 (DIN)352hp (metric)

Engine Power - ISO 14396347HP




Biodiesel CapabilityUp to B20¹

EmissionsMeets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards.

Note (1)Net power advertised is the power available at the flywheel when the engine is equipped with fan, air intake system, exhaust system, and alternator with engine speed at 1,900 rpm. Advertised power is tested per the specified standard in effect at the time

Note (2)¹Cat diesel engines are required to use ULSD (ultra-low sulfur diesel fuel with 15 ppm of sulfur or less) or ULSD blended with the following lower-carbon intensity fuels** up to: 20% biodiesel FAME (fatty acid methyl ester)* or 100% renewable diesel, HVO

Main System - Maximum Flow560 l/min (148 gal/min)

Maximum Pressure - Equipment5076psi

Maximum Pressure - Equipment - Lift Mode5511psi

Maximum Pressure - Travel5076psi

Maximum Pressure - Swing4264psi

Swing Speed4.09r/min

Swing Speed8r/min

Maximum Swing Torque105000ft·lbf

Fuel Tank Capacity159gal (US)

Cooling System11gal (US)

Engine Oil9gal (US)

Swing Drive5gal (US)

Final Drive - Each2gal (US)

Hydraulic System - Including Tank145gal (US)

Hydraulic Tank43gal (US)

DEF Tank21gal (US)

Note (1)22 m (72'2") UHD Front

Shipping Height - Top of Cab11.1ft

Cab Height - With OPG11.8ft

Shipping Length49.9ft

Tail Swing Radius11.6ft

Counterweight Clearance4.6ft

Ground Clearance1.7ft

Track Length18.9ft

Track Length to Center of Rollers15.6ft

Working Gauge - Extended Position11.1ft

Shipping Gauge - Retracted Position7.8ft

Transport Width10.7ft

Machine Length - without Front, with Counterweight23.3ft

Machine Length - without Front and Counterweight22.9ft

Track Width - Extended13.1ft

Track Width - Retracted9.8ft

Note (2)600 mm (24") Track Shoes

Note 1Straight - R3.2 m (10' 6") Stick (Over-the-Front) - HVG Undercarriage

BucketGD 2.27 m³ (2.97 yd³)

Maximum Pin Height at Stick Nose39.8ft

Maximum Weight at Stick Nose9260lb

Maximum Height at Stick Nose in Max Reach Position7.6ft

Maximum Reach at Stick Nose34.8ft

Maximum Digging Depth16.1ft

Maximum Reach - Ground Level39.9ft

Maximum Loading Height34ft

Minimum Loading Height15.7ft

Bucket Digging Force - ISO47160lbf

Stick Digging Force - ISO37300lbf

Note 1Bent - R3.2DB (10'6") Stick - HVG Undercarriage

BucketGD 2.27 m³ (2.97 yd³)

Maximum Digging Depth21.4ft

Maximum Reach - Ground Level36.7ft

Maximum Cutting Height35.4ft

Maximum Loading Height24.9ft

Minimum Loading Height10.4ft

Bucket Digging Force - ISO47160lbf

Stick Digging Force - ISO37300lbf

Air ConditioningThe air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.0 kg (2.2 lb) of refrigerant which has a CO2 equivalent of 1.430 metric tonnes (1.576 tons).


Standard and optional equipment may vary. Consult your Cat dealer for details.


Standard and optional equipment may vary. Consult your Cat dealer for details.


Tilt-up demolition cab with P5A laminated front and roof glass

High-resolution 254 mm (10") LCD touchscreen monitor

Premium heated and cooled auto adjustable suspension seat

Bluetooth® integrated radio

Auto bi-level air conditioner

Jog dial and shortcut keys for monitor control

Keyless push-to-start engine control

Height-adjustable console

Tilt-up left-side console

Cat Stick Steer

Auxiliary relay

Tilt rocker switch

Sky wiper switch

LED interior lights

Roller front sunscreen

P5A fixed windshield


Roller rear sunscreen



Remote Flash

Stability monitoring system

Electronic pitch and roll indicator

Travel direction indicator

Operator Coaching

Electronic joystick pattern changer

Cat Grade with 2D and offset memory (Retrofit boom only)

Cat Payload (Retrofit boom only)


VisionLink Productivity


Maintenance-free 1,000 CCA batteries (x 4)

Centralized electrical disconnect switch

LED lights


Premium surround lighting package


Three selectable modes: Power, Smart, ECO

Auto engine speed control

Up to 4500 m (14,760 ft) altitude capability

Reverse fan

52° C (126° F) high-ambient cooling

-18° C (0° F) cold start capability

Double element air filter with integrated pre-cleaner


-32° C (-25° F) cold start capability

Cold start block heaters

Ether starting aid


Boom lowering check valve (BLCV) for UHD front

Stick lower check valve (SLCV) for UHD front

Electronic main control valve

Heavy lift mode

Auto hydraulic oil warmup

Auto swing parking brake

High Performance hydraulic return filter

Two-speed travel

Bio hydraulic oil capability


SmartBoom with BLCV and Overload Warning Device for UHD front

Bio hydraulic oil capability

Combined two-way auxiliary circuits

High and medium-pressure auxiliary circuits

Quick coupler circuit


2D E-Fence (swing)

Cat One Key security system

Lockable external tool/storage box

Lockable door, fuel, and hydraulic tanks

Lockable fuel drain compartment

Lockable disconnect switch

Service platform with anti-skid plate and recessed bolts

Rear and right-hand side cameras

Operator Protective Guards (OPG)


360° visibility


Integrated vehicle health management system

Grouped location of engine oil and fuel filters

Scheduled Oil Sampling (S·O·S℠) ports


QuickEvac maintenance ready

Electric refueling pump with auto shutoff


9.0 mt (19,842 lb) counterweight

Full-length track guiding guards

Travel motor guard

Bottom guard


Hydraulic Variable Gauge undercarriage

Fixed Gauge undercarriage

600 mm (24 in) double grouser track shoes

600 mm (24 in) HD triple grouser track shoes

700 mm (28 in) triple grouser track shoes

700 mm (28") HD triple grouser track shoes


22 m (72'2") UHD front

25 m (82'0") UHD front

Two-piece Retrofit Variable Adjustment boom

7.4 m (24'3") Retrofit boom

3.9 m (12'10") Retrofit stick

3.2 m (10'6") Retrofit stick

2.8 m (9'2") Retrofit stick

Advanced tool control, UHD

Cradle for UHD front parts

Cradle for Retrofit front parts

View used options

See Available Used options



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