Cat 320 GC Technical Specifications

320 GC

Hydraulic Excavator

Technical Specifications

Congurations and features may vary by region. Please consult your Cat® dealer for availability in your area.

Table of Contents

Specications ..............................................................................................2

Engine ........................................................2

Swing Mechanism .............................................2

Weights.......................................................2

Track .........................................................2

Drive .........................................................2

Hydraulic System ..............................................2

Service Refill Capacities ........................................2

Standards.....................................................2

Sound Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Operating Weight and Ground Pressure...........................3

Major Component Weights ......................................3

Dimensions....................................................4

Working Ranges ...............................................5

Bucket Specifications and Compatibility ..........................6

Attachments Offering Guide:

China ......................................................7

Hong Kong, Taiwan..........................................7

Standard and Optional Equipment ............................................................................8

Dealer Installed Kit and Attachments ........................................................................10

320 GC Hydraulic Excavator Specifications

Engine

Engine Model Cat® C4.4

Net Power (ISO 9249) 107 kW 143 hp

Engine Power (ISO 14396) 108 kW 145 hp

Bore 105 mm 4 in

Stroke 127 mm 5 in

Displacement 4.4 L 269 in

• The 320 GC meets China Nonroad Stage III emission standards.

• Recommended for use up to 4500 m (14,764 ft) altitude with
engine power derate above 3000 m (9,842.5 ft).

• Net power is tested per ISO 9249. Standards in effect at the time
ofmanufacture.

• Net power advertised is the power available at the ywheel when
the engine is equipped with fan, air intake system, exhaust system
and alternator.

• Rated speed at 2,000 rpm.

Swing Mechanism

Swing Speed 11.3 rpm

Maximum Swing Torque 74.4 kN·m 54,900 lbf-ft

Weights

Operating Weight 19 800 kg 43,700 lb

• Reach boom, R2.9 (9'6") stick, GD 1.0 m (1.31 yd) bucket and
600 mm (24") triple grouser shoes, 3.7 mt (8,200 lb) counterweight.

Track

Standard Track Shoes Width 600 mm 24 in

Number of Shoes (each side) 45

Number of Track Rollers (each side) 7

Number of Carrier Rollers (each side) 2

Drive

Gradeability 35°/70%

Maximum Travel Speed 5.7 km/h 3.5 mph

Maximum Drawbar Pull 206 kN 46,311 lbf

Hydraulic System

Main System – Maximum Flow –
Implement

Maximum Pressure – Equipment 35 000 kPa 5,075 psi

Maximum Pressure – Travel 34 300 kPa 4,974 psi

Maximum Pressure – Swing 25 000 kPa 3,625 psi

Boom Cylinder – Bore 120 mm 5 in

Boom Cylinder – Stroke 1260 mm 50 in

Stick Cylinder – Bore 135 mm 5 in

Stick Cylinder – Stroke 1504 mm 59 in

Bucket Cylinder – Bore 115 mm 5 in

Bucket Cylinder – Stroke 1104 mm 43 in

429 L/min
(215 ×
2pumps)

113 gal/min
(57 ×
2pumps)

Service Refill Capacities

Fuel Tank Capacity 345 L 86.6 gal

Cooling System 25 L 6.6 gal

Engine Oil 15 L 4.0 gal

Swing Drive (each) 12 L 3.2 gal

Final Drive (each) 4 L 1.1 gal

Hydraulic System (including tank) 234 L 61.8 gal

Hydraulic Tank 115 L 30.4 gal

Standards

Brakes ISO 10265: 2008

Cab/ROPS ISO 12117-2: 2008

FOGS (optional) ISO 10262-2: 1998

Sound Performance

ISO 6395:2008 (external) 99 dB(A)

ISO 6396:2008 (inside cab) 70 dB(A)

• Hearing protection may be needed when operating with an open
operator station and cab (when not properly maintained or doors/
windows open) for extended periods or in a noisy environment.

2

320 GC Hydraulic Excavator Specifications

Operating Weight and Ground Pressure

600 mm (24")

Triple Grouser Shoes

Weight Ground Pressure

3.7 mt (8,200 lb) Counterweight Base Machine

Reach Boom + R2.9 (9'6") Stick + 1.0 m (1.31 yd) GD Bucket 19 800 kg 43,700 lb 45.6 kPa 6.6 psi

All operating weights include a 90% fuel tank with 75 kg (165 lb) operator.

Major Component Weights

kg lb

Base Machine (with 3.7 mt [8,200 lb] counterweight, standard swing frame, standard base frame with
standardtrack rollers and standard carrier rollers for standard undercarriage, without boom cylinders –
does not include 90% fuel and 75 kg [165 lb] operator)

Track Shoes:

600 mm (24") Width, 8.5 mm (0.33") Thick Triple Grouser Track Shoes for Standard Undercarriage 2580 5,700

Two Boom Cylinders 340 750

Weight of 90% Fuel Tank and 75 kg (165 lb) Operator 310 680

Counterweight:

3.7 mt Counterweight 3700 8,200

Swing Frame:

Standard Swing Frame 1880 4,150

Undercarriage:

Standard Base Frame with Standard Track Rollers and Standard Carrier Rollers
for Standard Undercarriage

Booms (including lines, pins, stick cylinder):

Reach Boom (5.7 m/18'8") 1690 3,700

Sticks (including lines, pins, bucket cylinder, bucket linkage):

Reach Stick (R2.9B1/9'6") 980 2,200

Buckets (without linkage):

1.0 m (1.31 yd) GD 730 1,600

13 200 29,100

4030 8,900

3