Is your John Deere L120 losing power, slipping, or refusing to move? Hydrostatic Transmission Service delivers expert rebuild and exchange solutions for the L120's hydrostatic drive system—backed by over 100 years of combined experience. Get your mower back to full working order with precision rebuilds tested to John Deere's own manufacturer specifications and a full 1-year warranty.
Comprehensive hydrostatic transmission rebuild, exchange, and support services tailored specifically for John Deere L120 units.
Full disassembly, cleaning, and rebuild of your John Deere L120 hydrostatic transmission by trained technicians. All components are measured and reconditioned to manufacturer specifications, with new seals, O-rings, and gaskets installed.
Minimize downtime with our Short-Time exchange program. Ship your L120 core and receive a fully tested, quality-assured rebuilt hydrostatic unit back quickly—complete with a full warranty so your mower is back in action fast.
Not sure how to reinstall your rebuilt hydrostatic unit? Our trained technicians provide expert installation guidance for your John Deere L120, ensuring the unit is correctly fitted and ready for reliable long-term performance.
Need a specific component for your L120's hydrostatic system? We stock new, used, and hard-to-find hydrostatic parts across multiple brands, helping you source the exact part required for a successful repair.
Have a worn-out or surplus L120 hydrostatic core? We pay top price for hydrostatic drive, pump, and motor cores—turning your old unit into value while helping us supply quality remanufactured components to other customers.
Every rebuilt John Deere hydrostatic unit is pressure-tested, flow-adjusted, and calibrated using our Statistical Process Control System. Quality data is recorded and checked against manufacturer specs before any unit ships.
Your John Deere L120 hydrostatic transmission unit arrives at our Tupelo, MS facility. Technicians perform a thorough initial inspection, documenting symptoms and identifying failure points before any work begins.
See how equipment owners worldwide have restored their John Deere L120 transmissions with our expert rebuild and exchange services.
When your John Deere L120 hydrostatic transmission needs expert attention, here's why customers worldwide trust us to get it right.
Our team brings over 100 years of combined hydraulic and hydrostatic service expertise—ensuring your L120 rebuild is handled by true specialists.
Every rebuilt John Deere hydrostatic unit ships with a full 1-year warranty, giving you confidence and long-term peace of mind after every repair.
Our Short-Time exchange program ships a tested, warranted replacement unit quickly—so your L120 is back to mowing without extended delays.
We use a Statistical Process Control System to verify every rebuild meets John Deere's exact specifications before any unit leaves our facility.
A world-class team dedicated to precision hydrostatic rebuilds.
Hydrostatic Transmission Service, LLC is headquartered in Tupelo, MS and has grown to become one of the world's premier providers of hydrostatic rebuild and exchange services. Trusted by major names like John Deere, Eaton, Parker, and Sauer Danfoss, the company has built its reputation on over 100 years of combined technician experience, rigorous quality control, and a commitment to minimizing customer downtime. Every technician is personally accountable for their work, and each rebuilt unit is verified against manufacturer specifications using a Statistical Process Control System. From individual L120 lawn tractor owners to large-scale international industrial clients, Hydrostatic Transmission Service delivers the same standard of excellence—quality is not just a goal, it is the company's most important asset.
John Deere recommends using their proprietary Hy-Gard J20C transmission and hydraulic oil for the L120's hydrostatic system. It is specifically formulated to meet the viscosity and lubrication requirements of John Deere hydrostatic drives. As an alternative, a high-quality 20W-50 motor oil meeting J20C specifications can be used. Always avoid using standard automotive ATF, as it can damage seals and internal components.
Our hydrostatic specialists are ready to help—call or email us for expert advice.
Recognized supplier of hydrostatic rebuild services to John Deere.
Every unit guaranteed to manufacturer specifications for one year.
Quality data verified against manufacturer specs on every rebuild.
Fill out the form below and one of our hydrostatic transmission specialists will reach out to assess your unit, walk you through the rebuild or exchange process, and provide all the information you need to get started.
For immediate assistance, feel free to give us a direct call at (800)-361-0068 You can also send us a quick email at sales@htsrepair.com
For immediate assistance, feel free to give us a direct call at (800)-361-0068 You can also send us a quick email at sales@htsrepair.com