The boom and arm cylinder assemblies are essential components of an excavator’s lifting and digging system. Proper maintenance and timely replacement of hydraulic cylinders and related parts are crucial for optimal excavator performance and productivity.
Functions of Boom and Arm Cylinder Assemblies:
The boom cylinder assembly consists of:
- Cilindro hidráulico – Pivots the boom up and down
- Conexiones de pines – Attach the cylinder to the boom and base
El arm cylinder assembly includes:
- Cilindro hidráulico – Actuates the articulating arm linkage
- Conexiones de pines – Attach the cylinder to the arm and boom
Hydraulic cylinders work by:
- Extending and retracting their rods in response to hydraulic pressure
- Raising and lowering the boom and stick arms
- Opening and closing the articulating arm at the joint
Components of Excavator Hydraulic Cylinders:
Hydraulic cylinders used in boom and arm assemblies include:
- Pistón – Actúa sobre el fluido hidráulico para extender o retraer la varilla.
- vara – Connects to the boom or arm and transmits force
- tubo del cilindro – Alberga el conjunto de pistón y varilla.
- focas – Evite fugas de líquido alrededor del pistón y el vástago.
- Bujes – Reducir la fricción dentro de las conexiones de los pasadores.
Maintaining Excavator Hydraulic Cylinders:
Routine maintenance should include:
- Checking for leaks around seals, cilindros, and hoses
- Inspecting rods/tubes for dents, scratches, or excessive wear
- Lubricating bushings and pins with grease every 50 horas
- Checking hoses/fittings for cracks, damage, or loose fittings
- Prueba de rango completo de movimiento – Los cilindros deben moverse libremente.
Proper maintenance and timely replacement of the boom and arm cylinder assemblies are critical to maximizing an excavator’s performance, productivity, and longevity. Neglected or worn hydraulic cylinders can drastically reduce excavator efficiency, costing operators time and money.