John Deere 120D Excavator Specs

Category: Excavators ➔
Manufacturer: John Deere ➔
Model: 120D ➔

The John Deere 120D is a hydraulic excavator in the 12-ton class, designed for general earthmoving, trenching, site preparation, and utility work. It is part of John Deere's D-Series excavator lineup and is commonly used in construction, landscaping, and municipal applications. The machine typically features a diesel engine, hydraulic boom and arm controls, a standard cab or enclosed operator station, and compatibility with a range of buckets and attachments. The 120D is known for balanced digging performance, transportability, and versatility on medium-duty job sites. Exact specifications vary by configuration, year, and market.

Boom/Stick Excavator Option 1

John Deere 120D Excavator Boom/Stick Excavator Option 1 specifications
Max Cutting Height	28.20 ft (8.60 m)
Max Digging Depth	18.30 ft (5.58 m)
Max Loading Height	20.30 ft (6.19 m)
Max Reach Along Ground	27.00 ft (8.23 m)
Max Vertical Wall Digging Depth	16.50 ft (5.03 m)
Shipping Height of Unit	9.00 ft (2.74 m)
Shipping Length of Unit	25.20 ft (7.68 m)

Boom/Stick Excavator Option 2

John Deere 120D Excavator Boom/Stick Excavator Option 2 specifications
Max Cutting Height	29.20 ft (8.90 m)
Max Digging Depth	19.90 ft (6.07 m)
Max Loading Height	21.30 ft (6.49 m)
Max Reach Along Ground	28.50 ft (8.69 m)
Max Vertical Wall Digging Depth	18.10 ft (5.52 m)
Shipping Height of Unit	9.00 ft (2.74 m)
Shipping Length of Unit	25.20 ft (7.68 m)

Bucket

John Deere 120D Excavator Bucket specifications
Maximum Bucket Capacity	1.10 cu yd (0.84 cu m)
Minimum Bucket Capacity	0.50 cu yd (0.38 cu m)
Reference Bucket Capacity	0.80 cu yd (0.61 cu m)

Dimensions

John Deere 120D Excavator Dimensions specifications
Digging Depth	19.92 ft (6.07 m)
Digging Reach	28.83 ft (8.79 m)
Ground Clearance	1.50 ft (0.46 m)
Height - Top of Cab	9.00 ft (2.74 m)
Length of Track on Ground	9.50 ft (2.90 m)
Removal Counterweight Clearance	3.00 ft (0.91 m)
Tail Swing Radius	7.00 ft (2.13 m)
Width to Outside of Tracks	8.50 ft (2.59 m)

Engine

John Deere 120D Excavator Engine specifications
Aspiration	Turbocharged air-to-air charge air cooler
Displacement	276.00 cu in (4,522.84 cu cm)
Engine Model	4045H tier III certified
Net Power	93.00 hp (69.35 kw)
Power Measured @	2000 rpm

Operating Specifications

John Deere 120D Excavator Operating Specifications specifications
Alternator Supplied Amperage	80 amps
Cooling System Fluid Capacity	5.30 gal (20.06 l)
Engine Oil Capacity	3.70 gal (14.00 l)
Fuel Capacity	66.10 gal (250.19 l)
Hydraulic Pump Flow Capacity	55.50 gpm (210.07 lpm)
Hydraulic System Fluid Capacity	35.10 gal (132.85 l)
Hydraulic System Relief Valve Pressure	4980 psi
Operating Voltage	24 volts

Swing Mechanism

John Deere 120D Excavator Swing Mechanism specifications
Swing Speed	13.3 rpm

Undercarriage

John Deere 120D Excavator Undercarriage specifications
Drawbar Pull	24,729.00 lbs (11,216.90 kg)
Ground Pressure	5.4 psi
Max Travel Speed	3.50 mph (5.63 kph)
Number of Carrier Rollers per Side	1
Number of Shoes per Side	44
Number of Track Rollers per Side	7
Shoe Size	23.70 in (60.20 cm)
Track Gauge	6.50 ft (1.98 m)

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