Serial Number Information
The serial number plate is typically located on the left-hand side of the undercarriage frame or near the operator cab step.
Use the machine's serial number to confirm compatibility with parts for engine, hydraulics, and undercarriage systems.
Key Specifications
Engine
| Feature |
Specification |
| Model |
Yanmar 4TNV88, 4-cylinder diesel |
| Displacement |
2,189 cm³ |
| Power Output |
28.2 kW (37.8 HP) @ 2,400 RPM |
| Cooling |
Water-cooled |
Operating Weight & Dimensions
| Feature |
Specification |
| Operating Weight |
5,280 kg (11,640 lbs) |
| Tail Swing Radius |
Zero tail swing |
| Fuel Capacity |
83 liters (22 gallons) |
Performance & Digging Specs
| Feature |
Specification |
| Max Dig Depth |
3,750 mm (12.3 ft) with long dipperstick |
| Max Ground Reach |
6,100 mm (20.0 ft) |
| Max Dumping Height |
3,680 mm (12.1 ft) |
Hydraulic System
| Feature |
Specification |
| Flow Rate |
167.1 L/min (44 GPM) |
| Operating Pressure |
240 bar (3,481 psi) |
Travel Specs
| Feature |
Specification |
| Travel Speed |
Up to 4.6 km/h (2.9 mph) |
Key Features
Zero Tail Swing Maneuverability
The 50Z3’s compact design allows full cab rotation within the track width, making it perfect for working alongside walls, fences, or in congested urban zones.
High-Performance Yanmar Engine
The 4TNV88 diesel engine delivers 37.8 HP, combining quiet operation, fuel efficiency, and long service life in one compact package.
Extended Digging Reach
With a long dipperstick, this mini excavator achieves a digging depth of 12.3 ft and a reach of 20 ft, offering performance beyond its size.
Efficient Hydraulics
The 44 GPM hydraulic system at 3,481 psi provides the muscle for quick cycle times and responsive control over bucket and boom operations.
Common Replacement Parts
Support peak operation with parts available at Broken Tractor:
Engine Components
Injectors, air filters, thermostats, glow plugs, water pumps
Hydraulic System
Main pump, swing motor, boom/stick cylinders, hose assemblies, valve bodies
Undercarriage
Rubber tracks, sprockets, rollers, idlers, tensioners
Cab & Controls
Joysticks, seat assemblies, control panel, monitor display
Maintenance Schedule
| Task |
Recommended Interval |
| Engine Oil & Filter |
Every 250 hours |
| Fuel Filter Replacement |
Every 250 hours |
| Hydraulic Oil & Filter |
Every 500 hours |
| Coolant Flush |
Annually or every 1,000 hours |
| Track Tension Check |
Weekly or after intense use |
| Swing Bearing Grease |
Every 50 hours |
