The maintenance and inspection procedures for the hose assembly differ depending on the type and model of the equipment used, but the hose assembly cannot be separated from the equipment itself unless it is used as piping for a hydraulic circuit.Therefore, it is necessary to check whether the hydraulic pumps, valves, hydraulic circuits and other related equipment parts are always working properly.If any abnormalities are found in pressure, temperature, vibration, sound, etc., immediately inspect and take necessary measures.
The maintenance and inspection items for the hose assembly are as shown in the table.
The maintenance and inspection items for the hose assembly are as shown in the table.
List of maintenance and inspection items
Item | Item | Major cause | treatment |
oil spill (Threaded joint) | Scratches on the seat surface, dust, or foreign matter caught in
Loose screws or O-ring deterioration | Cleaning the seat surface
Tighten screws and replace O-rings | |
oil spill (flange joint) | Loosening of the presser bolt
O-ring, packing deterioration | re-tightening of bolts
O-ring and packing replacement | |
oil spill (for hoses and fittings) assembly) | Degradation of rubber due to heat, oil, and long-term use
unreasonable plumbing | exchange
Is it sharply bent from the joint assembly? Review of piping method | |
Transformation | Collapse (dent) swelling | External impact Oil splashes from the outside Around the oil from the connection part | elimination of causative factors outer hose protection exchange depending on degree |
Trauma | friction or cut wound | Interference with other parts shock from the outside | |
External rubber crack | Large and small cracks occurred on the outer rubber | Influence of ozone, sunlight or paint oil | exchange depending on degree outer hose protection |
Abnormal hose movement during work | stretch, shrink, twist, bend | Improper hose length Improper piping method | exchange Use of adapters, etc. for reviewing piping |
hardening or softening | Degradation due to high/low temperature and oil | Replace if necessary | |
Abnormal noise, odor, abnormally high temperature, etc. | Often from related circuits | Full circuit inspection | |
Rusting on joints | Rust | Dust, water droplets, industrial water, salt wind | Timely application of anticorrosive paint However, avoid the rubber part |
Confirmation of date of manufacture or period of use | aging, deterioration | If more than ２ years have passed since manufacturing, replace it depending on the degree. |
