Mining Gearbox Repair & Gear Manufacturing
Crusher, conveyor and mill drives rebuilt for dust, abrasion and heavy loads — with emergency pickup and delivery when production is stopped.
Gearbox & Pump Repair for Mining
Rebuilt at our Rialto, CA shop.
Mining equipment works in the hardest conditions of any industry we serve: dust and grit in the air, abrasive ore, heavy shock loads, and long distances from the nearest parts supplier. A failed conveyor or crusher drive can stop an entire operation, so the repair needs to be thorough and the turnaround realistic. American Gearbox Repair rebuilds mining gearboxes and manufactures replacement gears at our shop in Rialto, California, serving mines across California and nationwide by pickup, delivery and shipped-in repair.
We rebuild drives for surface and underground operations, from primary crushing through conveying, grinding and material handling. Each unit is cleaned, inspected and measured, and we quote the repair before work begins. Rebuilt units carry our 24-month warranty.
Equipment We Repair in Mining
- Crusher drives — gearboxes for jaw, cone, gyratory and impact crushers, rebuilt for shock loads and tramp-iron events.
- Conveyor drives — head, tail and tripper drives, including shaft-mounted and foot-mounted reducers on long overland and plant conveyors.
- Grinding mill drives — ball, rod and SAG mill gearboxes and pinion gear sets, checked for tooth wear, alignment and lubrication problems.
- Hoist and winch gearboxes — drives where reliability is critical, inspected for gear, brake and bearing condition.
- Screen and feeder drives — vibrating screen and apron feeder gearboxes exposed to constant vibration and dust.
- Pumps and hydraulic cylinders — dewatering, slurry and process pumps, plus hydraulic cylinders on mobile and fixed plant equipment.
Common Failures We See
- Abrasive wear and contamination — dust and ore fines getting past seals and into the oil, wearing gears and bearings from the inside.
- Tooth pitting, spalling and breakage — from shock loads, tramp iron and misalignment.
- Bearing failure from heavy loads — combined radial and thrust loads on crusher and mill drives.
- Seal and breather failure — in dusty environments, letting contamination in and oil out.
- Housing wear and cracking — from vibration and mounting movement on older equipment.
Repair & Rebuilding Services
- Complete gearbox rebuilding — teardown, cleaning, inspection, measurement and rebuild with new gears, shafts, bearings and seals.
- Custom gear manufacturing — replacement gears, pinions and gear segments cut and machined when originals are worn or unavailable.
- Industrial pump repair — dewatering, slurry and process pumps rebuilt for abrasive service.
- Hydraulic cylinder repair — resealing, re-rodding and re-honing for cylinders on crushers, screens and handling equipment.
- Rush inspection for down equipment — prioritised inspection and quoting so a stopped operation can make a fast, informed decision.
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 down crusher or conveyor, call (714) 204-5167 right away. We will arrange emergency pickup or advise on shipping the unit in, and confirm a realistic rush schedule after inspection. 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.