Pulp & Paper Gearbox & Pump Repair
Digester, refiner and paper-machine drives rebuilt for steam, moisture and continuous duty — with emergency pickup when the machine is down.
Gearbox & Pump Repair for Pulp and Paper
Rebuilt at our Rialto, CA shop.
Pulp and paper mills run continuously in steam, moisture and chemical exposure, and a failed paper-machine drive, refiner gearbox or stock pump can stop the machine and spoil a run. The drives are often large, old and no longer supported with off-the-shelf parts, which is where rebuilding and custom gear manufacturing matter most. American Gearbox Repair rebuilds pulp and paper gearboxes and pumps at our shop in Rialto, California, serving mills across California and nationwide.
We rebuild paper-machine, stock-preparation and finishing drives, and manufacture replacement gears when the original cannot be bought. Every unit is inspected and quoted before work starts, and rebuilt units are covered by our 24-month warranty.
Equipment We Repair in Pulp and Paper
- Paper machine drives — gearboxes on dryer sections, press sections, winders and reel drives, rebuilt for continuous duty and moisture exposure.
- Refiner and pulper gearboxes — high-torque drives on refiners, pulpers and deflakers, checked for gear, bearing and shaft condition.
- Digester and chip handling drives — gearboxes on digesters, chip conveyors and feeders in the pulping area.
- Stock and process pumps — centrifugal pumps for stock, white water, chemicals and effluent, rebuilt for abrasive and corrosive service.
- Winder, sheeter and converting drives — gearboxes on winders, sheeters and converting lines where speed consistency matters.
- Hydraulic cylinders — cylinders on presses, lifts and handling equipment, resealed and tested.
Common Failures We See
- Moisture and steam ingress — water and steam getting past seals into gearboxes and bearings.
- Corrosion from chemicals and white water — attacking housings, shafts and fasteners.
- Gear and bearing wear from continuous duty — long runs with heavy, variable loads.
- Pump wear from stock and grit — abrasive fibres and solids wearing impellers, seals and clearances.
- Misalignment from thermal movement — on long paper-machine drive lines.
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 for older paper-machine and refiner drives when originals are no longer available.
- Industrial pump repair — stock, process, white-water and effluent pumps rebuilt and tested.
- Hydraulic cylinder repair — reseal, re-rod and re-hone for mill cylinders.
- Emergency inspection for down machines — prioritised inspection and quoting when the paper machine is stopped.
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 paper-machine drive, refiner gearbox or stock pump is failing, call (714) 204-5167. We will arrange emergency pickup or shipping to our Rialto shop 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.