Spool control 3953718 is used on selected Hiab equipment as part of the hydraulic valve control system. It forms part of the mechanism that controls the movement of the hydraulic valve spool. If the spool control becomes worn or damaged it can affect valve operation, leading to reduced control accuracy or inconsistent hydraulic response. Replacing it with the correct Hiab part number helps maintain smooth and reliable crane control. Compatibility Part number 3953718 is fitted to selected Hiab machines. Suitability depends on the crane model and serial number. If you are unsure whether this spool control is correct for your equipment, contact us with the serial number and we will confirm compatibility before you order. Only commonly used parts are listed on our website. We can supply any Hiab parts UK customers require, including model specific hydraulic control components identified by part number. If you cannot find the part you need, contact us with the serial number of your crane and details of the part required and we will help identify the correct item. Call: 01937 349222Email: [email protected]