55523 – Hydro-Gear Lip Seal .562″ x .875″ (OEM-Spec) The Hydro-Gear 55523 Lip Seal is a genuine OEM-spec hydraulic sealing component engineered to provide reliable fluid containment and protect internal components in Hydro-Gear hydrostatic transmissions, pumps, and related drive systems. Precisely sized at 0.562″ inner diameter × 0.875″ outer diameter, this lip seal features a robust sealing lip designed for high-pressure environments, resisting fluid leakage while maintaining system efficiency under load. Built to Hydro-Gear’s exacting specifications, the 55523 seal ensures long-lasting service life and dependable performance in commercial and residential turf applications. Product Details Manufacturer Part Number: 55523Brand: Hydro-Gear (OEM-Spec)Part Type: Lip Seal (Hydraulic Oil Seal)Dimensions: 0.562″ ID × 0.875″ ODSeal Style: Standard lip seal designFunction: Prevents hydraulic fluid leakage around rotating shaftsApplication: Hydro-Gear hydrostatic transmissions, pumps, and drive assembliesMaterial: Durable elastomer compound (fluid-resistant)OEM Status: Genuine Hydro-Gear replacement part Function Creates a fluid-tight seal around rotating components to prevent hydraulic oil leaks Helps maintain proper hydraulic pressure in drive and pump systems Protects internal components from contamination by dirt and moisture Supports smooth, efficient hydraulic operation under varying loads Provides consistent performance in high-pressure hydrostatic environments Compatible With The Hydro-Gear 55523 Lip Seal is used in select Hydro-Gear hydrostatic systems, including: Hydro-Gear integrated transaxle and pump/motor units requiring this specific seal size OEM parts diagrams and rebuild kits that list part number 55523 Note: Always verify compatibility against your Hydro-Gear transmission or pump model using the OEM parts breakdown before ordering. How It’s Used This lip seal installs inside the hydraulic housing where a rotating shaft passes through a bore: Prepare System: Drain hydraulic fluid and clean the work area. Access Seal Location: Disassemble the transmission or pump housing per service manual instructions. Remove Old Seal: Extract the worn seal carefully, avoiding damage to the housing bore. Inspect Surfaces: Check shaft and bore surfaces for wear or scoring. Install New Seal: Press the Hydro-Gear 55523 lip seal evenly into the sealing bore using an appropriate seal driver. Reassemble & Test: Reassemble components, refill hydraulic fluid, and test system operation for leakage and performance. Accurate installation is essential for reliable sealing and fluid containment. Suggested Maintenance Inspect seal areas during scheduled service intervals for signs of seepage Keep hydraulic fluid clean and at proper levels to reduce premature seal wear Replace seals whenever related hydraulic components are disassembled Avoid scratching or damaging sealing surfaces during service Use only OEM-spec Hydro-Gear seals for correct fit and durable performance The Hydro-Gear 55523 Lip Seal (.562″ × .875″) is a dependable OEM-spec hydraulic sealing solution designed to prevent leaks, protect internal components, and ensure long-lasting performance in compatible Hydro-Gear hydrostatic drive systems.
