The Caterpillar 321D LCR crawler excavator was introduced in 2007, with an operating weight of 50,265 lb (22.8 t), engine output of 138 hp (103 kW) and a bucket capacity of 1.44 yd³ (1.1 m³). Maximum digging depth is 21.9 ft (6.68 m), maximum horizontal reach is 32 ft (9.75 m) and it uses the C6.4 Acert engine.
Caterpillar Crawler Excavator Specifications
Crawler Excavator • Introduced 2007 • C6.4 Acert
Weight: 50,265 lb (22.8 t)Power: 138 hp (103 kW)Bucket: 1.44 yd³ (1.1 m³)Dig depth: 21.9 ft (6.68 m)
Key specifications
50,265 lb (22.8 t)Operating weight
138 hp (103 kW)Engine power
1.44 yd³ (1.1 m³)Bucket capacity
21.9 ft (6.68 m)Digging depth
32 ft (9.75 m)Horizontal reach
23,830 lbf (106 kN)Tear-out force
23.6 in (600 mm)Track width
2007Introduced
Useful excavator charts
Charts appear only when enough usable specifications are available.
Digging geometry
Dig depth
21.9 ft
Reach
32 ft
Transport dimensions
Length
44.3 ft
Width
11.2 ft
Height
15.7 ft
Model spec snapshot
Main numeric specifications for this excavator.
50,265 lbWeight
138 hpPower
1.44 yd³Bucket
23,830 lbfTear-out
How the Caterpillar 321D LCR compares
Comparison is against Caterpillar crawler excavators in the same broad operating-weight class where enough comparable data exists.
Engine power
138 hp
13% below avg
26th percentile
Bucket capacity
1.44 yd³
9% below avg
28th percentile
Digging depth
21.9 ft
In line with avg
57th percentile
Horizontal reach
32 ft
In line with avg
46th percentile
Engine power138 hp
Low 114 hpAverage 158 hpHigh 208 hp
About 13% below the peer average.
Bucket capacity1.44 yd³
Low 0.78 yd³Average 1.59 yd³High 2.11 yd³
About 9% below the peer average.
Digging depth21.9 ft
Low 19.4 ftAverage 21.5 ftHigh 25.6 ft
In line with the peer average.
Horizontal reach32 ft
Low 30.3 ftAverage 32.3 ftHigh 36.6 ft
In line with the peer average.
Tear-out force23,830 lbf
Low 22,256 lbfAverage 30,702 lbfHigh 45,861 lbf
About 22% below the peer average.
This model Peer average
Crawler excavator information
Manufacturer
Caterpillar
Model
321D LCR
Introduced
2007
Undercarriage
LC
Boom
MB
Operating specifications
Operating weight
50,265 lb (22.8 t)
Bucket capacity
1.44 yd³ (1.1 m³)
Bucket width
3.9 ft (1.2 m)
Maximum digging depth
21.9 ft (6.68 m)
Maximum horizontal reach
32 ft (9.75 m)
Tear-out force
23,830 lbf (106 kN)
Engine and emissions
Engine manufacturer
Caterpillar
Engine model
C6.4 Acert
Engine power
138 hp (103 kW)
Displacement
391 cu in (6.4 L)
RPM at maximum torque
1800 rpm
Diesel particulate filter
No
Dimensions and transport
Transport length
44.3 ft (13.5 m)
Transport width
11.2 ft (3.4 m)
Transport height
15.7 ft (4.8 m)
Track width
23.6 in (600 mm)
Equipment and features
Air conditioning
Yes
Track adjustment
Yes
Disclaimer: Specifications can vary by configuration, market and attachment. Verify critical dimensions, capacities and ratings against the official machine documentation and the Caterpillar USA website.
