At Specialty Gear Drives, we specialize in the emergency repair, rebuild, and in-house manufacturing of Marley gearboxes and gear reducers — including the SPX M-Series line used in cooling towers across America.
All Fields Must Be Filled Out
Cooling tower gearbox failures don’t just disrupt production — they can threaten entire facility cooling systems.
Whether you’re running an M-Series gear reducer or an older Marley unit, Specialty Gear Drives has the expertise and in-house manufacturing capability to get you back online quickly and reliably.
We repair and manufacture all Marley gear components on-site, keeping lead times short and quality high.
Our technicians are familiar with both current SPX M-Series models and legacy Marley configurations — including units that weren’t properly retrofitted during cooling tower upgrades.
In Cyclo and SM-Cyclo units, the eccentric cam and cycloidal disc are subject to high-contact-stress fatigue. Worn profiles cause backlash and efficiency loss before failure.
Precision bearing assemblies wear out, especially at the eccentric input stage. We replace all bearings with certified equivalents using proper installation methods.
Helical and spur stages develop fatigue under overload. Pitting and spalling spread quickly once started and require immediate repair.
Worn shaft seals allow oil leakage and contamination, leading to accelerated internal wear across the gearbox.
Roller pins and output shafts suffer corrosion and dimensional wear, requiring reconditioning or replacement.
Shock loads and bearing movement damage housing bores, causing misalignment. Precision line-boring restores OEM tolerances.
Continuous heavy-duty operation causes overheating when lubrication degrades. High-temp coatings help prevent future heat damage.
Unusual vibration indicates worn parts or misalignment. Full rebuild inspection corrects all faults before reassembly.
Even Marley precision-engineered gear drives encounter specific failure modes under sustained industrial stress. Our diagnostics team identifies the root cause before any repair work begins.
Every Marley gearbox receives our full six-step rebuild process — including specialized procedures for Cyclo-series eccentric drives and Paramax helical reducers.
We arrange no-cost nationwide freight pickup. Your Sumitomo gearbox arrives, is logged, assigned to a specialist, and disassembly begins the same day.
All components including cycloidal discs, cams, roller pins, gears, and housings are cleaned and measured against OEM tolerances.
We document exactly why the unit failed — overload, misalignment, lubrication damage, or other causes — to prevent repeat failure.
Worn gears, shafts, and precision parts are manufactured in-house to OEM specs using CNC gear cutting including cycloidal profiles.
Timken-certified bearings installed with thermal process, new seals, gaskets, and high-temp coating applied. All preloads set to spec.
Every rebuilt gearbox runs a full 6-hour load test monitoring vibration, temperature, and leaks before certification with warranty.
We manufacture Marley gears on-site — including Cyclo-series profiles. No OEM backorders slowing your repair down.
Pickup and delivery at zero cost anywhere in the US. We handle all logistics so you focus on getting back online.
Every Marley rebuild is covered from the moment it returns to production — the strongest guarantee available.
We manufacture Marley gears on-site — including Cyclo-series profiles. No OEM backorders slowing your repair down.
Our technicians carry the same certifications required by OEM service centers — applied to every Marley gearbox that enters our shop, from compact Cyclo units to large-frame Paramax drives.
We never press bearings. Thermal shaft shrinkage and a superheated bearing dropped into place creates a perfect interference fit without stress — matching or exceeding Sumitomo's own installation standards.
Marley drives are used in critical applications where every hour of downtime has a price tag. Our emergency team is on call around the clock to expedite any repair when production is at risk.
Our repair coordinators — all experienced former gearbox technicians — can often diagnose your Sumitomo failure over the phone before it ships, saving you critical hours in the repair timeline.
Don’t let a failed Marley unit halt your production line. Call Specialty Gear Drives for a free quote, free pickup, and the fastest certified repair turnaround in the industry.