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How to Replace the High-Pressure Filter Element in the Hydraulic System of a Wet Spray Machine
Release time:
2025-12-04
Source:
Author:
Summary:
Guidelines for Replacing the High-Pressure Filter Element in the Hydraulic System of a Wet Spray Machine
I. Safety Preparation Work
1. System pressure relief operation: After shutting down the machine, operate the handle back and forth three times to release any residual pressure; observe the pressure gauge to confirm that the reading has returned to zero (a reading below 5 bar is considered safe).
2. Tool and Consumables Preparation: Specialized filter cartridge wrench (matching the model of the filter housing); new filter cartridge (confirm that the OEM part number is consistent); cleaning cloth and hydraulic oil (for replenishment, using the same model).
II. Detailed Instructions for Replacement Steps
1. Removing the old filter element: Use a belt wrench to rotate the filter housing counterclockwise (pay attention to the placement of the oil collection tray). Inspect the old filter element for any residual metal chips (particles larger than 3 mm require a system-wide inspection).
2. Filter tank cleaning: Wipe the inner wall of the filter tank with a lint-free cloth; replace all seals (including the bottom support spring seal).
3. Installing the new filter element: Pre-apply new oil to the surface of the sealing ring (to reduce initial friction); after hand-tightening, add another 3/4 turn (over-tightening may damage the threads).
III. Key Considerations
1. Pollution Control: Disassembly and assembly time should be kept within 15 minutes; use cleaning plugs to seal all openings.
2. Key points for model confirmation: Filtration accuracy (β value ≥ 200); burst pressure (> 1.5 times the system’s maximum pressure).
IV. Post-processing Replacement
1. System venting: Start the system in jog mode three times (with 30-second intervals); check for pressure fluctuations (should be < ±2 bar).
2. Run the test: Operate at idle for 10 minutes; use an infrared thermometer to monitor the temperature difference (inlet and outlet oil ports <5℃).
V. Preventive Maintenance Recommendations
1. Replacement cycle
Standard operating conditions: 1000 hours
Dust environment: 500 hours
2. Monitoring methods: Differential pressure alarm setpoint (triggered at 0.3 bar); monthly oil contamination level testing.
VI. Common Error Warnings
1. Operational pitfalls: Using a standard wrench to remove the filter housing (causing deformation of the filter housing); failing to replace the sealing gasket (80% of leaks originate from this issue).
2. Accessory Selection: Do not use non-OEM filters (filter efficiency decreases by 40%).
7. Emergency Response Plan
1. Handling of filter element rupture: Immediately shut down the machine; replace all system hydraulic fluid and flush the pipelines.
8. Maintenance Data Records
1. Replace the filter: Initial differential pressure (new filter element < 0.1 bar); oil sample test results (ISO code).
RELATED INFORMATION
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Changsha Base:Hunan Zenxon Heavy Industry Technology Co., Ltd.
Address: Jinrong Tongxin International Industrial Park, Changsha High-tech Zone
Loudi Base:Hunan Haoda Heavy Industry Technology Co., Ltd.
Address: Loudi Avenue, Loudi High-tech Industrial Development Zone, Lianyuan City, Loudi City, Hunan Province
Telephone:400-186-0868
E-mail:3804246750@qq.com
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