Tags: Directional-control valves

Hydraulic Valve Troubleshooting

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Listed below are areas that you can diagnose in hydraulic valves. When working on a specific machine, refer to a machine’s technical manual for more information. a. Pressure-Control Valves. The following lists information when troubleshooting relief, pressure-reducing, pressure sequence, and unloading valves: (1) Relief Valves. Consider the following when troubleshooting relief valves because they have …

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Hydraulic Directional Control Valves

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Hydraulic Directional Control Valves

Directional-control valves also control flow direction. However, they vary considerably in physical characteristics and operation. The valves may be a • Poppet type, in which a piston or ball moves on and off a seat. • Rotary-spool type, in which a spool rotates about its axis. • Sliding-spool type, in which a spool slides axially …

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