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Link-Belt 3900 Quantum and 4300 Quantum specifications

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Listing-entry count
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Short answer

Link-Belt 3900 Quantum and 4300 Quantum: full-size excavators.

Selected configuration figures
ConfigurationDocumented field and quantity
3900 Quantum
Net Power
178 hp
Operating Weight
62,900 lb
4300 Quantum
Net Power
240 hp
Operating Weight
73,570 lb
3900 Quantum and 4300 Quantum specification matrix — Listing labels reported by the source
Publisher nameSource guideListing-entry countLabels named by the source
Link-Belt3900 Quantum and 4300 Quantum23900 Quantum and 4300 Quantum
Boom/Stick Option (Hex) 1
Specification3900 Quantum4300 Quantum
Shipping Length Of Unit32.88 ft36 ft
Shipping Height Of Unit10.93 ft11.65 ft
Max Cutting Height33.31 ft32.75 ft
Max Loading Height23.2 ft22.68 ft
Max Reach Along Ground34.75 ft34.03 ft
Max Vertical Wall Digging Depth21.04 ft18.38 ft
Max Digging Depth23.59 ft22.31 ft
Boom/Stick Option (Hex) 1Boom 19\'2\" (5850mm) / Stick 11\'2\" (3400mm)Boom 21\'2\" (6450mm) / Stick 8\'8\" (2630mm)
Dimensions and weight
Specification3900 Quantum4300 Quantum
Ground Clearance1.65 ft1.48 ft
Height To Top Of Cab10.01 ft10.21 ft
Width To Outside Of Tracks8.5 ft11.16 ft
Length Of Track On Ground12.83 ft12.83 ft
Tail Swing Radius9.81 ft10.67 ft
Removal Counterweight Clearance3.91 ft3.91 ft
Undercarriage
Specification3900 Quantum4300 Quantum
Track Gauge8.5 ft8.54 ft
Shoe Size31.5 in31.5 in
Ground Pressure5.97 psi7 psi
Number Of Shoes Per Side5050
Number Of Carrier Rollers Per Side22
Max Travel Speed3 mph3.1 mph
Number Of Track Rollers Per Side99
Engine
Specification3900 Quantum4300 Quantum
Number Of Cylinders66
Engine Model6CT8.3MII-C265
Net Power178 hp240 hp
Power Measured @2,200 rpm1,700 rpm
Max Torque516 lb-ft900 lb-ft
Displacement506 cu in661 cu in
AspirationTurbochargedTurbocharged
Torque Measured @1,450 rpm1,300 rpm
Operational
Specification3900 Quantum4300 Quantum
Operating Weight62,900 lb73,570 lb
Fuel Capacity81.9 gal153.3 gal
Cooling System Fluid Capacity6.9 gal15.1 gal
Hydraulic System Fluid Capacity58.2 gal84.6 gal
Operating Voltage24 V24 V
Engine Oil Capacity5.1 gal9 gal
Swing Drive Fluid Capacity1.6 gal3.4 gal
Alternator Supplied Amperage65 amps70 amps
Hydraulic System Relief Valve Pressure4,980 psi4,620 psi
Hydraulic Pump Flow Capacity112 gpm142 gpm
Swing Mechanism
Specification3900 Quantum4300 Quantum
Swing Speed10.4 rpm10.3 rpm
Swing Torque55,150 lb-ft75,400 lb-ft
Buckets
Specification3900 Quantum4300 Quantum
Reference Bucket Capacity1.3 yd31.5 yd3
Minimum Bucket Capacity0.8 yd31.2 yd3
Maximum Bucket Capacity2.3 yd32.8 yd3
Variants — Source comparison annotation
Source guideDiffering-field count reported
3900 Quantum and 4300 Quantum35
Ratios
Figure3900 Quantum4300 Quantum
Engine horsepower per 1,000 lb of weight2.83.3
Fuel tank per engine horsepower0.46 gal0.64 gal
Hydraulic power from the listed pump flow and relief pressure325.4 hp382.8 hp

3900 Quantum and 4300 Quantum: forum references

Related discussion: “Link Belt 4300q Solenoid Block Issues”: 370LX Tier III and 2 related models.

Used market for the 3900 Quantum and 4300 Quantum — Dated first-page listing snapshot
Observation dateListing sourceEquipment searchListings
2026-09-24MachineryTraderLink-Belt full-size excavator2
ModelListedModel yearsLowest askingHighest askingMedian askingMedian hours
4300 Quantum21999$19,500$37,500$28,500None shown
3900 Quantum and 4300 Quantum: recall reference — Dated CPSC search
Search dateDatabaseNames queriedSearch result
2026-09-24U.S. Consumer Product Safety CommissionLink-Belt together with the full-size excavator 3900 Quantum, 4300 QuantumNo matching recall in this search

Sources for this page

Evidence classDocument, classification and recorded date
Reference site
Reference site
Used-market listings
Federal agency data
Recorded observations — Classification in the linked listing
GuideAs-listed machine class
Link-Belt 3900 Quantum and 4300 Quantumfull-size excavator
Forum-title snapshot
Observation fieldRecorded value
Title count17
Forum indexesHeavy Equipment Forums
Search wordingthe 3900 Quantum and 4300 Quantum full-size excavator
Latest title quoted by the referenceLink Belt 4300q Solenoid Block Issues

Link-Belt 3900 Quantum and 4300 Quantum: Configuration records

3900 Quantum
SpecificationSource figure
Boom/Stick Option (Hex) 1
Shipping Length Of Unit32.88 ft
Shipping Height Of Unit10.93 ft
Max Cutting Height33.31 ft
Max Loading Height23.2 ft
Max Reach Along Ground34.75 ft
Max Vertical Wall Digging Depth21.04 ft
Max Digging Depth23.59 ft
Boom/Stick Option (Hex) 1Boom 19'2" (5850mm) / Stick 11'2" (3400mm)
Dimensions and weight
Ground Clearance1.65 ft
Height To Top Of Cab10.01 ft
Width To Outside Of Tracks8.5 ft
Length Of Track On Ground12.83 ft
Tail Swing Radius9.81 ft
Removal Counterweight Clearance3.91 ft
Undercarriage
Track Gauge8.5 ft
Shoe Size31.5 in
Ground Pressure5.97 psi
Number Of Shoes Per Side50
Number Of Carrier Rollers Per Side2
Max Travel Speed3 mph
Number Of Track Rollers Per Side9
Engine
Number Of Cylinders6
Engine Model6CT8.3
Net Power178 hp
Power Measured @2,200 rpm
Max Torque516 lb-ft
Displacement506 cu in
AspirationTurbocharged
Torque Measured @1,450 rpm
Operational
Operating Weight62,900 lb
Fuel Capacity81.9 gal
Cooling System Fluid Capacity6.9 gal
Hydraulic System Fluid Capacity58.2 gal
Operating Voltage24 V
Engine Oil Capacity5.1 gal
Swing Drive Fluid Capacity1.6 gal
Alternator Supplied Amperage65 amps
Hydraulic System Relief Valve Pressure4,980 psi
Hydraulic Pump Flow Capacity112 gpm
Swing Mechanism
Swing Speed10.4 rpm
Swing Torque55,150 lb-ft
Buckets
Reference Bucket Capacity1.3 yd3
Minimum Bucket Capacity0.8 yd3
Maximum Bucket Capacity2.3 yd3

Source

4300 Quantum
SpecificationSource figure
Boom/Stick Option (Hex) 1
Shipping Length Of Unit36 ft
Shipping Height Of Unit11.65 ft
Max Cutting Height32.75 ft
Max Loading Height22.68 ft
Max Reach Along Ground34.03 ft
Max Vertical Wall Digging Depth18.38 ft
Max Digging Depth22.31 ft
Boom/Stick Option (Hex) 1Boom 21'2" (6450mm) / Stick 8'8" (2630mm)
Dimensions and weight
Ground Clearance1.48 ft
Height To Top Of Cab10.21 ft
Width To Outside Of Tracks11.16 ft
Length Of Track On Ground12.83 ft
Tail Swing Radius10.67 ft
Removal Counterweight Clearance3.91 ft
Undercarriage
Track Gauge8.54 ft
Shoe Size31.5 in
Ground Pressure7 psi
Number Of Shoes Per Side50
Number Of Carrier Rollers Per Side2
Max Travel Speed3.1 mph
Number Of Track Rollers Per Side9
Engine
Number Of Cylinders6
Engine ModelMII-C265
Net Power240 hp
Power Measured @1,700 rpm
Max Torque900 lb-ft
Displacement661 cu in
AspirationTurbocharged
Torque Measured @1,300 rpm
Operational
Operating Weight73,570 lb
Fuel Capacity153.3 gal
Cooling System Fluid Capacity15.1 gal
Hydraulic System Fluid Capacity84.6 gal
Operating Voltage24 V
Engine Oil Capacity9 gal
Swing Drive Fluid Capacity3.4 gal
Alternator Supplied Amperage70 amps
Hydraulic System Relief Valve Pressure4,620 psi
Hydraulic Pump Flow Capacity142 gpm
Swing Mechanism
Swing Speed10.3 rpm
Swing Torque75,400 lb-ft
Buckets
Reference Bucket Capacity1.5 yd3
Minimum Bucket Capacity1.2 yd3
Maximum Bucket Capacity2.8 yd3

Source

More in Link-Belt: 330LX Tier 3/350X2/350X3 specs, 290LX Road Builder/3 related models specs, 460LX/5800 Quantum.