Oil & Gas Gearbox & Pump Repair
Pumpjack, compressor and pipeline drives rebuilt for remote, continuous service — with emergency pickup and delivery nationwide.
Gearbox & Pump Repair for Oil and Gas
Rebuilt at our Rialto, CA shop.
Oil and gas equipment often works far from the shop, in heat, dust and corrosive conditions, and a failed drive can shut in a well or stop a compressor station. The repair has to be done properly, documented clearly and ready to go back into service without a second trip. American Gearbox Repair rebuilds oil and gas gearboxes and pumps at our shop in Rialto, California, serving operators and service companies across California and nationwide by pickup, delivery and shipped-in repair.
We work on production, midstream and support equipment, from pumpjacks and compressors to pipeline and processing-plant drives. Every unit is inspected and quoted before work starts, and rebuilt units are covered by our 24-month warranty.
Equipment We Repair in Oil and Gas
- Pumpjack gearboxes — reducers on beam pumping units, rebuilt for cyclic loads, seal wear and bearing fatigue.
- Compressor drives — gearboxes on gas compressors, checked for gear wear, bearing condition and alignment.
- Drilling support drives — gearboxes on mud pumps, drawworks support equipment and handling systems.
- Pipeline pump drives — gearboxes and pumps on transfer, booster and injection service.
- Processing plant drives — gearboxes on mixers, conveyors and fans in gas plants and refineries.
- Hydraulic cylinders and pumps — cylinders and pumps on well-service, lifting and handling equipment.
Common Failures We See
- Cyclic fatigue and tooth wear — from the repeated loading of pumpjack and compressor service.
- Seal failure and oil loss — in hot, dusty field conditions, leading to bearing and gear damage.
- Bearing failure from contamination — sand, dust and moisture in the lubricant.
- Corrosion — from produced water, chemicals and coastal or desert exposure.
- Pump wear from abrasive fluids — sand and solids wearing impellers, seals and clearances.
Repair & Rebuilding Services
- Complete gearbox rebuilding — teardown, cleaning, inspection and rebuild with new gears, bearings, seals and shafts as required.
- Custom gear manufacturing — replacement gears cut when the original is worn, broken or no longer available.
- Industrial pump repair — transfer, booster, injection and process pumps rebuilt and tested.
- Hydraulic cylinder repair — reseal, re-rod and re-hone for field and plant cylinders.
- Emergency pickup and shipping coordination — so a down unit in the field gets to our Rialto shop quickly and comes back ready to install.
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
If a pumpjack reducer, compressor drive or pipeline pump is down, call (714) 204-5167. We will arrange emergency pickup or shipping, prioritise the inspection, and confirm a realistic rush schedule after we see the unit. 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.