John Deere 120D excavator is a mid-size hydraulic crawler excavator designed for general earthmoving, utility work, site preparation, and material handling. It is part of John Deere's D-Series and is commonly used in construction, landscaping, and municipal applications. The 120D features a diesel engine, hydraulic boom and arm controls, a rotating upper structure, and a tracked undercarriage for stability on uneven ground. Typical attachments may include buckets, thumbs, and hydraulic tools. The model is known for balanced digging performance, operator visibility, and service access. Specifications vary by configuration, year, and market.
Boom/Stick 1
John Deere 120D Excavator Boom/Stick 1 specifications
Boom/Stick 1
8\'3\" (2520mm) stick
Max Cutting Height
28.12 ft (8.57 m)
Max Digging Depth
18.28 ft (5.57 m)
Max Loading Height
20.21 ft (6.16 m)
Max Reach Along Ground
26.91 ft (8.20 m)
Max Vertical Wall Digging Depth
16.47 ft (5.02 m)
Shipping Height Of Unit
8.99 ft (2.74 m)
Shipping Length Of Unit
25.14 ft (7.66 m)
Boom/Stick 2
John Deere 120D Excavator Boom/Stick 2 specifications
Boom/Stick 2
9\'11\" (3010mm) stick
Max Cutting Height
29.20 ft (8.90 m)
Max Digging Depth
19.89 ft (6.06 m)
Max Loading Height
21.30 ft (6.49 m)
Max Reach Along Ground
28.45 ft (8.67 m)
Max Vertical Wall Digging Depth
18.05 ft (5.50 m)
Shipping Height Of Unit
8.99 ft (2.74 m)
Shipping Length Of Unit
25.17 ft (7.67 m)
Buckets
John Deere 120D Excavator Buckets specifications
Maximum Bucket Capacity
1.1 cu yd
Minimum Bucket Capacity
0.5 cu yd
Reference Bucket Capacity
0.8 cu yd
Dimensions
John Deere 120D Excavator Dimensions specifications
Ground Clearance
1.45 ft (0.44 m)
Height
9.00 ft (2.74 m)
Height To Top Of Cab
8.99 ft (2.74 m)
Length
25.08 ft (7.65 m)
Length Of Track On Ground
9.45 ft (2.88 m)
Removal Counterweight Clearance
2.92 ft (0.89 m)
Tail Swing Radius
6.99 ft (2.13 m)
Weight
30,481.00 lbs (13,825.97 kg)
Width
8.42 ft (2.57 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 Make
2240
Engine Model
4045H, tier III certified
Net Power
93.00 hp (69.35 kw)
Number Of Cylinders
4
Power Measured @
2000 rpm
Operational
John Deere 120D Excavator Operational 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 V
Operating Weight
30,481.20 lbs (13,826.06 kg)
Swing Mechanism
John Deere 120D Excavator Swing Mechanism specifications
Swing Speed
13.3 rpm
Swing Torque
25,077.00 lbs ft (33,999.40 nm)
Undercarriage
John Deere 120D Excavator Undercarriage specifications
Drawbar Pull
24,729.00 lbs (11,216.90 kg)
Ground Pressure
5.36 psi
Max Travel Speed
3.42 mph (5.50 kph)
Number Of Carrier Rollers Per Side
1
Number Of Shoes Per Side
44
Number Of Track Rollers Per Side
7
Shoe Size
23.63 in (60.02 cm)
Track Gauge
6.50 ft (1.98 m)
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