Bending Machines rely on a healthy hydraulic system to form accurate, consistent bends. Here are the key checks to find faults on the hydraulic circuit whether you are buying used Bending Machines or simply trying to maintain a Bending Machine already in your workshop.
Fluid Level and Condition
Check the fluid level by pulling up the dipstick or looking into the sight glass. Make sure the machine is switched off and is on level ground. Check that the end of the dipstick is within the marked range. The fluid should look clear or pale amber in colour. If it is dark, milky or even contains some grit then it has become contaminated and must be changed before use.
Hose and Fitting Integrity
Look for soft patches, splits or inflation along the length of all hoses from the pump to the individual cylinders. Also, inspect all metal fittings for signs of oil leakage around the threads. A slow drip or a patch of dampness on a surface that collects dust is likely to deteriorate under load.
Cylinder Seals
Extend the cylinder fully and then check for oil leakage down the rod. Some leakage of oil on the first extension is normal, but a continuous leak or a ‘puddle’ at the rod seal indicates severe leakage and potentially further damage. Inconsistent pressure and very slow formation are symptoms of this type of leakage.
Pressure Settings
Compare the current system pressure to the rated pressure, as shown on the manufacturer’s plate or in the manual. If the system pressure cannot reach or is unable to maintain the rated pressure, check the relief valve to see if it is worn or set incorrectly.
Filter Condition
Most hydraulic systems have a return-line filter. This is usually supplied with an indicator flag which drops when the filter becomes blocked. The filter can then be by-passed allowing clean oil to continue to be supplied to the system. If you want Bending Machines, https://www.cotswold-machinery-sales.co.uk/euromac-bending-machines/horizontal-bending-machines/ is a good place to start.
Catch these potential problems before they become major issues, and you will have a reliable, repeatable hydraulic system for years to come.