Technical Parameter
| Conventional parameters | |
|---|---|
| Equipment Model | JY321E |
| Model Abbreviation | 621 |
| Excavator Weight (t) | 21 |
| Traveling Method | Crawler |
| Bucket Type | Backhoe |
| Operating Conditions | General purpose |
| Engine (Fuel) | |
| Engine Brand | Cummins |
| Model | CumminsB5.9C |
| Rated Power (kW) | 112 |
| Performance Parameters | |
| Operating Weight (kg) | 21000 |
| Bucket Capacity (m³) | 0.9 |
| Travel Speed (High/Low) (km/h) | 4.6/2.6 |
| Swing Speed (rpm) | 13 |
| Grounding pressure(kPa) | 42 |
| Slope Climbing Ability(%) | 65 |
| Bucket Digging Force (kN) | 132 |
| Arm Digging Force (kN) | 108 |
| Arm Length (mm) | 3280 |
| Boom Length (mm) | 2920 |
| Machine Dimensions | |
| Length × Width × Height (Transportation Status) (mm) | 9760x3000x3280 |
| Cabin Full Height (mm) | 2885 |
| Clearance Over Counterweight (mm) | 1060 |
| Track Ground Length (mm) | 3720 |
| Total Track Length (mm) | 4510 |
| Track Shoe Width (mm) | 600 |
| Overall Track Width (mm) | 3000 |
| Track Gauge (mm) | 2400 |
| Minimum Ground Clearance (mm) | 465 |
| Rear End Swing Radius (mm) | 2940 |
| Working Range | |
| Maximum Digging Radius (mm) | 9970 |
| Maximum Digging Depth (mm) | 6570 |
| Maximum Digging Height (mm) | 9210 |
| Maximum Dumping Height (mm) | 6380 |
| Hydraulic System | |
| Main Relief Valve Setting Pressure (Mpa) | 32 |
| Maximum Flow Rate of Main Pump (L/min) | 2x224 |