Maintenance and troubleshooting:Cleanliness


Most hydraulic and pneumatic faults are caused by dirt. Very small particles can nick seals, abrade surfaces, block orifices and cause valve spools to jam. Ideally components should not be dismantled in the usual dirty conditions found on site. These should be taken to a clean workshop equipped with proper workbenches. Components and hoses come from manufacturers with their orifices sealed with plastic plugs, to prevent dirt ingress during transit. These should be left as they are during storage and removed only when the component is to be put to use.

Filters are meant to remove dirt particles, but only work until they are clogged. A dirty filter may cause the fluid to bypass and can make things far more worse by accumulating the particles and then releasing them all in one lump. Filters should be regularly checked and cleaned or changed when required.

The oil condition in a hydraulic system is also crucial for maintaining reliability. Oil,

which is dirty, oxidized or contaminated, forms a sticky gummy sludge which blocks small orifices and causes the valve spools to jam. The oil condition should be regularly checked and the suspect oil changed before problems develop.

Related posts:

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System selection considerations:Pipeline conveying capacity.
High pressure:Problems with moisture
Pipelines and valves:Pipeline material,Hygiene and Hoses
High pressure:Rotary valves,Blow tanks,Basic blow tank types and Top and bottom discharge.
Review of pneumatic conveying systems:Staged systems and Dual vacuum and positive pressure systems.
Control components in a hydraulic system:Flovvrneters.
Pipeline scaling parameters:Stepped pipelines
Pipeline scaling parameters:Pipeline bore and Empty line pressure drop
Pneumatic controllers.
Fundamental Principles:temperature measurement
Hydraulic Pumps and Pressure Regulation:combination pumps
Air Compressors, Air Treatment and Pressure Regulation:air receivers and compressor control

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