Key Specs
If you need reliability, durability, high productivity, and low cost, the Cat® 318 GC is made for you. This excavator is designed, built, and uniquely supported to help you get more work done every day and help put money back in your pocket.
Operate with ease. A powerful engine, electro-hydraulic pump and control valve, and high digging force help you get more work done every day.
Long life filters for fuel, hydraulic oil, and air help lower your overall costs.
The 318 GC is easy to own and operate, providing the reliability and durability you expect from Cat® products.
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| Net Power - ISO 9249 | 111 hp 83.1 kW |
| Engine Model | C3.6 C3.6 |
| Net Power - ISO 9249 (DIN) | 113 hp (metric) 113 hp (metric) |
| Engine Power - ISO 14396 | 121 hp 90 kW |
| Engine Power - ISO 14396 (DIN) | 122 hp (metric) 122 hp (metric) |
| Bore | 4 in 98 mm |
| Stroke | 5 in 120 mm |
| Displacement | 220 in³ 3.6 l |
| Biodiesel Capability | Up to B20¹ Up to B20¹ |
| Emissions | Meets Brazil MAR-1 emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA. Meets Brazil MAR-1 emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA. |
| Note (1) | Net power advertised is the power available at the flywheel when the engine is equipped with fan, air intake system, exhaust system and alternator with engine speed at 2,400 rpm. Advertised power is tested per the specified standard in effect at the time of manufacture. Net power advertised is the power available at the flywheel when the engine is equipped with fan, air intake system, exhaust system and alternator with engine speed at 2,400 rpm. Advertised power is tested per the specified standard in effect at the time of manufacture. |
| Note (2) | ¹Cat engines are compatible with diesel fuel blended with the following lower-carbon intensity fuels** up to: 100% biodiesel FAME (fatty acid methyl ester)* or 100% renewable diesel, HVO (hydrotreated vegetable oil) and GTL (gas-to-liquid) fuels. Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details. *For use of blends higher than 20% biodiesel, consult your Cat dealer. **Tailpipe greenhouse gas emissions from lower-carbon intensity fuels are essentially the same as traditional fuels. ¹Cat engines are compatible with diesel fuel blended with the following lower-carbon intensity fuels** up to: 100% biodiesel FAME (fatty acid methyl ester)* or 100% renewable diesel, HVO (hydrotreated vegetable oil) and GTL (gas-to-liquid) fuels. Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details. *For use of blends higher than 20% biodiesel, consult your Cat dealer. **Tailpipe greenhouse gas emissions from lower-carbon intensity fuels are essentially the same as traditional fuels. |
| Operating Weight | 38600 lb 17500 kg |
| Maximum Digging Depth | 20 ft 6110 mm |
| Boom | Reach 5.1 m (16'9") Reach 5.1 m (16'9") |
| Stick | Reach 2.6 m (8'6") Reach 2.6 m (8'6") |
| Bucket | SD 0.91 m³ (1.19 yd³) SD 0.91 m³ (1.19 yd³) |
| Maximum Reach at Ground Level | 28.9 ft 8800 mm |
| Maximum Cutting Height | 29.3 ft 8930 mm |
| Maximum Loading Height | 20.6 ft 6270 mm |
| Minimum Loading Height | 7.5 ft 2280 mm |
| Maximum Depth Cut for 2440 mm (8 ft) Level Bottom | 19.3 ft 5890 mm |
| Maximum Vertical Wall Digging Depth | 16.6 ft 5070 mm |
| Bucket Digging Force - ISO | 27650 lbf 123 kN |
| Stick Digging Force - ISO | 17980 lbf 80 kN |
| Main System - Maximum Flow | 296 L/min (78 gal/min) 296 L/min (78 gal/min) |
| Maximum Pressure - Equipment | 5076 psi 35000 kPa |
| Maximum Pressure - Travel | 5076 psi 35000 kPa |
| Maximum Pressure - Swing | 3452 psi 23800 kPa |
| Stick Cylinder - Bore | 5 in 120 mm |
| Stick Cylinder - Stroke | 47 in 1197 mm |
| Bucket Cylinder - Bore | 4 in 100 mm |
| Boom Cylinder - Stroke | 40 in 1015 mm |
| Boom Cylinder - Bore | 4 in 105 mm |
| Bucket Cylinder - Stroke | 37 in 939 mm |
| Swing Speed | 9.56 r/min 9.56 r/min |
| Maximum Swing Torque | 33840 lbf·ft 46 kN·m |
| Fuel Tank Capacity | 75.3 gal (US) 285 l |
| Cooling System | 2.9 gal (US) 11 l |
| Engine Oil | 2.9 gal (US) 11 l |
| Final Drive - Each | 0.8 gal (US) 3 l |
| Hydraulic System - Including Tank | 50.2 gal (US) 190 l |
| Hydraulic Tank | 24.8 gal (US) 94 l |
| Boom | Reach 5.1 m (16'9") Reach 5.1 m (16'9") |
| Stick | Reach 2.6 m (8'6") Reach 2.6 m (8'6") |
| Bucket | SD 0.91 m³ (1.19 yd³) SD 0.91 m³ (1.19 yd³) |
| Shipping Height - Top of Cab | 9.9 ft 3030 mm |
| Handrail Height | 9.6 ft 2930 mm |
| Shipping Length | 28.6 ft 8730 mm |
| Tail Swing Radius | 8.9 ft 2700 mm |
| Counterweight Clearance | 3.4 ft 1030 mm |
| Ground Clearance | 1.5 ft 460 mm |
| Track Length | 13 ft 3970 mm |
| Length to Center of Rollers | 10.4 ft 3170 mm |
| Track Gauge | 6.5 ft 1990 mm |
| Transport Width | 8.5 ft 2590 mm |
| Length - Center of Rollers | 10 ft 3040 mm |
| Operating Weight | 31600 lb 14300 kg |
