1. Check Oil Level, Oil Quality & Suction Circuit
- Start with the hydraulic oil tank when the machine cannot build sufficient pressure.
- Low oil level, contaminated oil, wrong viscosity, or foamy oil can reduce pump suction and system pressure.
- Inspect suction filter, suction pipe, and tank breather.
- Blocked filter or air leakage often causes noisy pump operation and weak compression.
2. Inspect Relief Valve & Pressure Setting
- Relief valve is the most common cause of low pressure in hydraulic balers.
- Stuck valve core, fatigued spring, blocked damping hole, or moved adjustment handle can cause early pressure release.
- Clean the relief valve and check the spring and sealing parts.
- Reset pressure according to the manufacturer's specification.
3. Test Hydraulic Pump, Cylinder Seals & Piping
- If oil circuit and relief valve are normal, check hydraulic pump for internal wear, low flow, or coupling damage.
- Inspect cylinder piston seals, valve spools, and high‑pressure pipe joints.
- Internal leakage in the main cylinder or directional valve can make the ram feel weak even when the pump is running.
4. Verify Gauge, PLC Signals & After‑Sales Support
- Damaged pressure gauge or blocked test point may give a false low reading; compare with a reliable gauge.
- Also check PLC signals, solenoid valves, emergency stop status, and overload alarms.
- For export customers, request hydraulic schematic, fault code list, CE documentation, and spare parts list to support overseas maintenance.
