The Caterpillar 321 C LCR crawler excavator was introduced in 2004, with an operating weight of 50,265 lb (22.8 t), engine output of 138 hp (103 kW) and a bucket capacity of 1.37 yd³ (1.05 m³). Maximum digging depth is 21.7 ft (6.62 m), maximum horizontal reach is 31.8 ft (9.69 m) and it uses the 3066 ATAAC engine.
Caterpillar Crawler Excavator Specifications
Crawler Excavator • Introduced 2004 • 3066 ATAAC
Weight: 50,265 lb (22.8 t)Power: 138 hp (103 kW)Bucket: 1.37 yd³ (1.05 m³)Dig depth: 21.7 ft (6.62 m)
Key specifications
50,265 lb (22.8 t)Operating weight
138 hp (103 kW)Engine power
1.37 yd³ (1.05 m³)Bucket capacity
21.7 ft (6.62 m)Digging depth
31.8 ft (9.69 m)Horizontal reach
22,706 lbf (101 kN)Tear-out force
23.6 in (600 mm)Track width
2004Introduced
Useful excavator charts
Charts appear only when enough usable specifications are available.
Digging geometry
Dig depth
21.7 ft
Reach
31.8 ft
Transport dimensions
Length
29 ft
Width
9.8 ft
Height
10.4 ft
Model spec snapshot
Main numeric specifications for this excavator.
50,265 lbWeight
138 hpPower
1.37 yd³Bucket
22,706 lbfTear-out
How the Caterpillar 321 C 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
1.37 yd³
13% below avg
26th percentile
Digging depth
21.7 ft
In line with avg
49th percentile
Horizontal reach
31.8 ft
In line with avg
41st percentile
Engine power138 hp
Low 114 hpAverage 158 hpHigh 208 hp
About 13% below the peer average.
Bucket capacity1.37 yd³
Low 0.78 yd³Average 1.59 yd³High 2.11 yd³
About 13% below the peer average.
Digging depth21.7 ft
Low 19.4 ftAverage 21.5 ftHigh 25.6 ft
In line with the peer average.
Horizontal reach31.8 ft
Low 30.3 ftAverage 32.3 ftHigh 36.6 ft
In line with the peer average.
Tear-out force22,706 lbf
Low 22,256 lbfAverage 30,702 lbfHigh 45,861 lbf
About 26% below the peer average.
This model Peer average
Crawler excavator information
Manufacturer
Caterpillar
Model
321 C LCR
Introduced
2004
Undercarriage
LC
Boom
MB
Operating specifications
Operating weight
50,265 lb (22.8 t)
Bucket capacity
1.37 yd³ (1.05 m³)
Bucket width
3.5 ft (1.08 m)
Maximum digging depth
21.7 ft (6.62 m)
Maximum horizontal reach
31.8 ft (9.69 m)
Tear-out force
22,706 lbf (101 kN)
Engine and emissions
Engine manufacturer
Caterpillar
Engine model
3066 ATAAC
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
29 ft (8.83 m)
Transport width
9.8 ft (2.98 m)
Transport height
10.4 ft (3.17 m)
Track width
23.6 in (600 mm)
Equipment and features
Air conditioning
Yes
Overload alert
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.
