Why do hydraulic cylinders require maintenance?
Hydraulic cylinders are important components in hydraulic systems and their performance directly affects the efficiency and life of the entire hydraulic equipment. However, with daily use, the surface of hydraulic cylinders is prone to rust due to environmental factors or improper operation. This rust not only affects the appearance of the hydraulic cylinder, but can also lead to serious consequences such as seal failure and piston rod movement stagnation. Therefore, regular maintenance of hydraulic cylinders can ensure normal operation and extend service life.
The dangers of rusted hydraulic cylinders
Rusted hydraulic cylinders can cause the following hazards：
Reduced equipment performance
Rust can increase friction between the piston rod and seal, causing equipment to jam.
Reduced service life
Rust can corrode the surface of the piston rod, causing irreversible damage and shortening the life of the hydraulic cylinder.
Cause equipment failure
Rust particles can enter the hydraulic system and contaminate the hydraulic oil, causing other components to fail.
Why hydraulic cylinders rust
There are three main reasons why hydraulic cylinders rust:
Hydraulic cylinders are in a humid environment for long periods of time
If the hydraulic cylinder is exposed to a high humidity environment, it is easy to cause rust.
Improper storage
Hydraulic cylinders are stored directly in the open air or in an environment with corrosive gases without any protective measures.
Lack of regular maintenance
Lack of regular cleaning and protective treatment will accelerate the rate of rust.
How to judge rust
During daily inspection, you can judge whether the hydraulic cylinder is rusted by the following methods:
Brown spots or rust film on the surface
This is the easiest form of rust to find.
Piston rod movement stuck
If the movement of the piston rod becomes uneven, this may be caused by rust.
Why remove rust in time?
Benefits of timely rust removal
Prevent corrosion or damage to the hydraulic cylinder
Rust will continue to erode the hydraulic cylinder and, in severe cases, result in the scrapping of parts.
Ensure the efficiency of equipment operation
Removing rust can restore the smooth surface of the piston rod and ensure the smooth operation of the hydraulic cylinder.
Two points of preparation before cleaning
Safety precautions
Wear gloves and goggles
Prevent chemicals or rust chips from damaging your skin and eyes during the rust removal process.
Ensure that the system is switched off or depressurised.
Prevent accidental start-up during cleaning.
Tools or materials to be prepared
Rust remover or penetrating oil
Used to soften rust and facilitate removal.
Sandpaper or wire brush
Used to gently polish the rusted surface.
Two clean cloths
Used to wipe the surface and residue from the hydraulic cylinder.
Rust inhibitor or lubricant
Used to prevent the recurrence of rust.
Six steps to rust removal
Step 1: Check the hydraulic ram
Check the severity of the rust
Minor rust can be removed by simple cleaning, but severe rust requires professional repair or replacement.
Check that the chrome rod or seal is not damaged.
Check that the rust has not damaged the parts.
Step 2: Pre-cleaning
Wipe off any dust and rust from the surface with a dry cloth to ensure the surface is clean.
Step 3: Apply rust remover or penetrating oil
Apply evenly to the rust and leave to soften.
Step 4: Remove the rust
Use sandpaper to gently polish off the rust, taking care not to use too much force to avoid damaging the piston rod surface.
Step 5: Clean the residue
Wipe the surface with a clean cloth to ensure there is no rust or rust remover residue.
Step 6: Apply rust inhibitor
After cleaning, apply an anti-rust coating or lubricant to prevent the hydraulic cylinder from rusting again.
After cleaning, there are two things to check
Check that the hydraulic ram can operate normally
After cleaning, run the hydraulic ram to ensure that it can operate normally.
Carry out regular maintenance to prevent rust from recurring
It is recommended to establish a regular maintenance schedule that includes cleaning and application of rust inhibitor.
What are the benefits of regular maintenance for hydraulic cylinders?
Extend service life
Regular maintenance prevents rust and wear, significantly extending the life of your hydraulic cylinder.
Reduce maintenance costs
Timely cleaning and maintenance can reduce the failure rate of hydraulic cylinders and reduce maintenance costs.
Improve equipment efficiency
Maintaining hydraulic cylinders can maintain efficient operation and improve the efficiency of the overall equipment.
