The Caterpillar 4T-1040 Hydraulic Safety Relief Valve is a Cat-brand relief component identified by NSN 4820-01-503-6261 and is part of the 6E-2588 GP-main control hydraulic valve system. This valve is actuated by static pressure upstream of the valve and functions as a safety relief device that may be set to close at a predetermined pressure to protect the hydraulic circuit from overpressure. It is used within Caterpillar hydraulic assemblies as a dedicated pressure-relief element in the main control pathway.
