Relief Valve (Flow Control Valve) and its Spring

Check fluid passage of relief valve and orifice of connector for obstruction (clogged).
Check sliding surface of relief valve for wear and damage.

Fig 1: Checking Sliding Surface Of Relief Valve For Wear And Damage
Courtesy of SUZUKI OF AMERICA CORP.
Check free length of relief valve spring (1). Replace if any defective is found.
Free length of relief valve spring

Standard: 22.0 mm (0.866 in.)

Limit: 19.0 mm (0.748 in.)

Fig 2: Checking Free Length Of Relief Valve Spring
Courtesy of SUZUKI OF AMERICA CORP.