Posted on March 4, 2022 by Jack BobCat 753 – HYDRAULIC CONTROL VALVE (ADVANCED CONTROL SYSTEM) (ACS) – Lift Base End Restrictor Remove the BICS valve assembly from the control valve. (See BICSTM Valve, Removal And Installation on Page 20-41-9.) Remove the restrictor (Item 1) [Figure 20-41-49] from the lift section base end port.