340 Straight Boom

This unit includes a general purpose bucket, maintenance package, connectivity, remote monitoring and your own team of product experts from Holt of California

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The image displayed is representative and may not reflect the exact specifications.

With its new cab, long maintenance intervals, and power system that improves fuel efficiency up to 15%, the Cat® 340 is the perfect choice for low-level demolition, sorting, and other excavation tasks.


Operating Weight 87800lb
Note (1) Long undercarriage, Straight boom, R3.9DB (12'10") stick, GD 2.27 m³ (2.97 yd³) bucket, 700 mm (28") triple grouser shoes, and 9.0 mt (19,800 lb) counterweight.

Working Ranges and Forces

Maximum Pin Height at Stick Nose 39.4ft
Maximum Weight at Stick Nose 9170lb
Boom Straight 6.9 m (22'8")
Stick Reach 3.9 m (12'10")
Bucket GD 2.27 m³ (2.97 yd³)
Maximum Digging Depth 21.8ft
Maximum Reach at Ground Level 40.5ft
Maximum Cutting Height 45.2ft
Maximum Loading Height 33.6ft
Minimum Loading Height 11ft
Maximum Depth Cut for 2440 mm (8'0") Level Bottom 21.4ft
Maximum Vertical Wall Digging Depth 18.5ft
Bucket Digging Force -ISO 47150lbf
Stick Digging Force - ISO 32440lbf


Engine Model C9.3B
Net Power - ISO 9249 346HP
Net Power - ISO 9249 (DIN) 351hp (metric)
Engine Power - ISO 14396 347HP
Engine Power - ISO 14396 (DIN) 352hp (metric)
Bore 5in
Stroke 6in
Biodiesel Capability Up to B20¹
Displacement 568in³
Emissions Meets 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

Hydraulic System

Main System - Maximum Flow 560 l/min (148 gal/min)
Maximum Pressure - Equipment 5076psi
Maximum Pressure - Equipment - Lift Mode 5511psi
Maximum Pressure - Travel 5076psi
Maximum Pressure - Swing 4264psi

Swing Mechanism

Swing Speed 8.84r/min
Maximum Swing Torque 10741ft·lbf

Service Refill Capacities

Fuel Tank Capacity 158.5gal (US)
Cooling System 10.5gal (US)
Engine Oil 8.5gal (US)
Swing Drive 4.8gal (US)
Final Drive - Each 2.1gal (US)
Hydraulic System - Including Tank 98.5gal (US)
Hydraulic Tank 42.5gal (US)
DEF Tank 21.1gal (US)


Boom Straight 6.9 m (22'8")
Stick Reach 3.9 m (12'10")
Bucket GD 2.27 m³ (2.97 yd³)
Shipping Height - Top of Cab 11ft
Cab Height - With OPG 11.5ft
Shipping Length 37.4ft
Tail Swing Radius 11.6ft
Counterweight Clearance 4.1ft
Ground Clearance 1.7ft
Track Length 16.5ft
Track Length to Center of Rollers 13.3ft
Track Gauge 8.5ft
Transport Width 10.9ft

Air Conditioning System

Air Conditioning The 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 Equipment

  • Standard and optional equipment may vary. Consult your Cat dealer for details.
Boom And Sticks
  • 6.9 m (22'8") Straight boom
  • ROPS, advanced sound suppression
  • High-resolution 254 mm (10") LCD touch screen monitor
  • Heated seat with air-adjustable suspension
Cat Technology
  • VisionLink®
  • Remote Flash
  • Remote Troubleshoot
  • Cat Grade 2D
  • Cat Assist
  • Cat Payload
Electrical System
  • Maintenance-free 1,000 CCA batteries (x2)
  • Centralized electrical disconnect switch
  • LED chassis light
  • Three selectable modes: Power, Smart, Eco
  • Auto engine speed control
  • 2300 m (7,546 ft) altitude capability with no engine power de-rating
  • 52° C (126° F) high-ambient cooling capacity
  • -18° C (0° F) cold start capability
  • Double element air filter with integrated pre-cleaner
Hydraulic System
  • Boom and stick regeneration circuit
  • Electronic main control valve
  • Heavy lift mode
  • Auto hydraulic oil warmup
  • Reverse swing damping valve
  • Auto swing parking brake
  • High performance hydraulic return filter
  • Two speed travel
  • Bio hydraulic oil capability
Safety And Security
  • 2D E-fence
  • Auto hammer stop
  • Caterpillar One Key security system
  • Lockable external tool / storage box
  • Lockable door, fuel and hydraulic tank locks
  • Lockable fuel drain compartment
  • Lockable disconnect switch
  • Service platform with anti-skid plate and recessed bolts
  • Right-hand handrail and hand hold
  • Standard visibility mirror package
  • Signaling / warning horn
  • Ground-level secondary engine shutoff switch
  • Rear and sideview cameras
  • Boom lowering check valve (optional in North America)
  • Stick lowering check valve (optional in North America)
Service And Maintenance
  • Grouped location of engine oil & fuel filters
  • Sampling ports for Scheduled Oil Sampling (S·O·S℠)
  • Integrated vehicle health management system
Undercarriage And Structures
  • Towing eye on base frame
  • 9.0 mt (19,842 lb) counterweight

Optional Equipment

  • Standard and optional equipment may vary. Consult your Cat dealer for details.
Boom And Sticks
  • 3.2 m (10'6") Reach stick
  • 3.9 m (12'10") Reach stick
Cat Technology
  • VisionLink Productivity
  • Cat Grade 2D with Attachment Ready Option (ARO)
  • Cat Grade 3D single GNSS
  • Cat Grade 3D dual GNSS
Electrical System
  • Premium surround lighting package
  • Cold start block heaters
  • Auto reverse fan
  • -32° C (-25° F) cold start capability
Hydraulic System
  • SmartBoom (Europe only)
  • Combined two-way auxiliary circuit with direct return
  • Medium-pressure auxiliary circuit
  • Cooling circuit
  • Quick coupler circuit for Cat Pin Grabber and CW Dedicated
Safety And Security
  • Cat Command (remote control)
  • Travel alarm (standard in North America)
  • Swing alarm
  • 360° visibility
Service And Maintenance
  • Preventative maintenance ready (Quick Evac)
  • Electric refueling pump with auto shutoff
Undercarriage And Structures
  • Long undercarriage
  • Long Narrow undercarriage
  • 600 mm (24") HD triple grouser track shoes
  • 700 mm (28") triple grouser track shoes
  • 850 mm (33") HD triple grouser track shoes