Posted on October 11, 2023 by Jack BOBCAT S130 – HYDRAULIC CONTROL VALVE (STANDARD) – Lift Arm Bypass Orifice Removal And Installation Remove the tubeline (Item 1) and fitting (Item 2) [Figure 20-40-114] from the valve. Check the lift arm bypass orifice (Item 1) [Figure 20-40-115]. NOTE: This orifice is not removable from the valve casting.