1-4P120 Hydraulic Valve One-Four Levers

A: Before installation, inspect the valve body for shipping damage and thoroughly clean the piping. Tighten the mounting bolts in a diagonal pattern, applying torque in stages to the specified value; avoid overtightening on one side, which could cause valve body deformation or valve core binding. Ensure the mounting surface has a flatness of at least 0.5 mm so that the valve body is not subjected to extraneous stress. Prior to initial startup, operate the system at low pressure to purge any trapped air.

A: You need to confirm the following information: number of sections, control method, spool neutral function type, main relief valve setting pressure, presence of overload or make-up valves, port thread specifications, and mounting dimensions. It is recommended to send the technical requirements and installation drawings to the sales team for verification.

A: The P120 is primarily used in equipment such as telehandlers, forklifts, all-terrain cranes, medium and small excavators, skid-steer loaders, compact wheel loaders, dump trucks, concrete pump trucks, harvesters, and tractors equipped with front loaders.

A: Before the equipment is stored for an extended period, apply anti-rust oil to the valve core to prevent corrosion. Before putting it back into service, check that the valve core moves freely and bleed out any air before normal operation.

A: First, check whether the oil pump is supplying oil correctly, whether the relief valve's pressure setting has dropped, and whether the oil temperature is too high (causing a drop in viscosity). If these factors are not the cause, the issue may be increased internal leakage due to spool wear.