Product Description Part Name: Switch Joystick Control Lever Assembly Part Number(s): 278327A1 Cross Reference Part Numbers: 278327A1, also cross-referenced by multiple independent distributors as 133790A1. Brand Compatibility: Case Machine Type: Backhoe Loader Condition: Brand New Aftermarket Replacement Shipping: Fast worldwide shipping with secure packaging and reliable delivery in 2–7 business days. This joystick control lever assembly enables precise operation of loader and backhoe hydraulic functions, giving the operator smooth, responsive control for digging, lifting and material handling. A worn or faulty assembly typically shows as unresponsive controls, intermittent switch operation or reduced hydraulic control accuracy. Compatible Models: Case 570LXT, 580L, 580SL, 590L, 590SL — confirmed across multiple independent hydraulic parts distributors (2026-08-10); also reported for extended 580/590 Series II and Tier III variants by some distributors. Our technical team can assist with confirming the correct replacement for your machine.