Pilot Solenoid Spool for LiuGong 915 936 and Lonking 60 80 220 Excavators – HYDAC-Style Hydraulic Valve Core Replacement

This pilot solenoid spool is designed as a universal replacement for LiuGong (915, 936) and Lonking (60, 80, 220) excavators that use HYDAC-style pilot solenoid valves in their hydraulic control systems. While not an original HYDAC part, it matches the dimensional and functional specifications of the spool used in these widely deployed Chinese-made machines.The spool is the moving core inside the solenoid valve that directs pilot oil to open or close the main hydraulic control spools. When worn or contaminated, it causes:Jerky or delayed hydraulic responseInconsistent flow controlComplete circuit failureTechnical features:Material: Hardened alloy steel (HRC 58–62)Surface finish: Mirror-polished (Ra ≤ 0.2 μm)Compatible with standard NBR O-rings (common sizes: 12×2.0 mm, 14×2.5 mm)Note: LiuGong and Lonking often source solenoid bodies from third-party suppliers that mimic HYDAC’s design. This spool fits those common clones. Always compare with your removed part for confirmation.Reference to brand names and model numbers is provided solely for compatibility identification. This product is not associated with Guangxi LiuGong Machinery Co., Ltd., Lonking Holdings Ltd., or HYDAC International GmbH.

• Aftermarket pilot solenoid spool compatible with LiuGong 915, 936 and Lonking 60, 80, 220 excavators — replaces worn internal core in HYDAC-style pilot control valves.
• Restores precise hydraulic response for boom, arm, bucket, and travel functions by ensuring smooth spool movement within the solenoid housing.
• Precision-machined from hardened alloy steel with mirror-polished surface to minimize internal leakage and prevent sticking under high-pressure pilot oil.
• Direct drop-in replacement matches common dimensions used in Chinese-made excavators with HYDAC-pattern solenoid assemblies — no modification required.
• Common failure signs: sluggish operation, delayed response, or complete loss of function in one hydraulic circuit.
• This product is an independent aftermarket component and is not affiliated with, endorsed by, or associated with LiuGong, Lonking, HYDAC, or any original equipment manufacturer.