Cement Plant Gearbox Repair & Gear Manufacturing
Kiln, mill and crusher drives rebuilt for dust, heat and heavy loads — with emergency pickup when the plant is down.
Gearbox & Pump Repair for Cement
Rebuilt at our Rialto, CA shop.
Cement plants combine almost every hard condition at once: fine abrasive dust, high temperatures, heavy shock loads and equipment that runs for long campaigns between shutdowns. A kiln drive, raw mill or crusher gearbox failure can stop the whole plant, and the repair has to survive the same conditions that caused the failure. American Gearbox Repair rebuilds cement plant gearboxes and manufactures replacement gears at our shop in Rialto, California, serving cement operations across California and nationwide.
We rebuild kiln, mill, crusher and conveyor drives, and we pay close attention to sealing, lubrication and alignment — the three things that most often decide how long a cement-plant gearbox lasts after rebuild. Rebuilt units carry our 24-month warranty.
Equipment We Repair in Cement
- Kiln drives — main kiln drive gearboxes and girth gear and pinion sets, inspected for tooth wear, alignment and lubrication problems.
- Raw and finish mill drives — gearboxes on ball, roller and vertical mills, rebuilt for heavy, continuous loads.
- Crusher drives — gearboxes for limestone, clinker and raw-material crushers, rebuilt for shock loads.
- Conveyor and elevator drives — gearboxes on belt conveyors, bucket elevators and screw conveyors moving raw meal, clinker and cement.
- Feeder and packing drives — drives on feeders, packers and loading equipment where dust is constant.
- Pumps and hydraulic cylinders — process, cooling and slurry pumps, plus hydraulic cylinders on plant equipment.
Common Failures We See
- Abrasive dust contamination — fine cement and raw-meal dust getting past seals and into the oil.
- Gear tooth pitting and wear — from heavy loads, misalignment and contaminated lubrication.
- Bearing failure from heat and dust — on kiln and mill drives running hot for long campaigns.
- Girth gear and pinion wear — uneven wear and alignment drift on kiln drives.
- Housing and mounting wear — from vibration and thermal movement over long runs.
Repair & Rebuilding Services
- Complete gearbox rebuilding — full teardown, cleaning, inspection, measurement and rebuild with new gears, bearings, seals and shafts.
- Custom gear manufacturing — replacement gears, pinions and girth-gear segments cut and machined when originals are worn or unavailable.
- Industrial pump repair — process, cooling and slurry pumps rebuilt for dusty, abrasive service.
- Hydraulic cylinder repair — reseal, re-rod and re-hone for cement-plant cylinders.
- Shutdown planning support — inspection and quoting timed to your planned outage, so the rebuilt unit is ready when the plant stops.
Emergency & Rush Service
When a line is down, call (714) 204-5167 — emergency service is available 24/7. We arrange emergency pickup and delivery to our Rialto shop, prioritise inspection, and, on qualifying jobs, complete rush repairs in 24–72 hours. Rush timing depends on unit condition, parts availability and job complexity, so we confirm a realistic schedule after inspection. See our emergency repair page.
How a Repair Works
Repairs are done at our shop in Rialto, California — we do not repair equipment on your site. Ship your unit to us, or arrange emergency pickup and delivery. We inspect it, confirm the failure and parts needed, and quote the repair before work starts. Turnaround depends on equipment condition, parts required, job complexity and availability. Rebuilt units are tested where applicable and covered by our 24-month warranty. Call (714) 204-5167 or request a quote with the brand, model and problem.
Get Started
For a kiln or mill drive problem, call (714) 204-5167 as early as you can — the sooner we inspect the unit, the better the chance of having it rebuilt and ready for your next shutdown. Call (714) 204-5167 or request a quote.
Need a repair quoted?
Call (714) 204-5167 or send a quote request — we will confirm what to send in and how pickup works.