Philadelphia Gear Repair
Philadelphia Gear large industrial gearboxes rebuilt in our Rialto, CA shop — for marine propulsion, power generation, cement, steel and mining nationwide.
Repair experience with Philadelphia Gear equipment
American Gearbox Repair repairs and rebuilds Philadelphia Gear gearboxes — the large, custom-built units used in marine main propulsion and auxiliary drives, power generation, cement mills, steel rolling mills and mining. Our repair experience includes Philadelphia Gear parallel-shaft and right-angle reducers, high-speed gear sets and the heavy enclosed drives built for continuous, high-torque service.
Please note: we are not an authorized dealer or authorized service center for Philadelphia Gear. We repair Philadelphia Gear equipment based on our repair experience, using careful measurement, inspection and rebuilding practices developed over years of working on large industrial gearboxes.
These are big, expensive units, and a proper rebuild is usually a fraction of the cost and lead time of a new box. Every Philadelphia Gear unit is fully inspected and measured before we quote, so you can make that decision with real numbers in front of you.
Common Philadelphia Gear problems we fix
- Gear tooth scoring and micropitting — from heavy cyclic loads and marginal film strength in large gear meshes
- Thrust bearing failure — worn thrust bearings and damaged thrust collars on marine and mill drives
- Oil contamination damage — water or particulate ingress scoring gears, bearings and journals
- Bearing bore wear — fretted or oversized housing bores causing misalignment and vibration
- Shaft and coupling damage — worn journals, damaged keyways and fretted coupling fits
- Seal and lube system leaks — failed seals, cracked oil lines and leaking lube-system fittings
How we rebuild your Philadelphia Gear unit
1. Detailed inspection
We tear the unit down, clean all components, and measure gear teeth, shafts, bearing bores and housing fits. Tooth contact patterns, oil condition and vibration history are all reviewed to find the root cause of the failure.
2. Gear and housing work
Damaged gears are re-cut or manufactured new to the original geometry. Worn bores are repaired, shafts are reground or replaced, and housings are checked for cracks, distortion and flatness.
3. Rebuild and test
The gearbox is reassembled with new bearings, seals and gaskets, backlash and bearing preload are set to specification, and the unit is run-tested for noise, temperature, vibration and leaks. Every rebuild carries our 24-month warranty.
Replacement components
Bearings, thrust bearings, seals, gaskets, gears, pinions, shafts, thrust collars, couplings and lube-system components. Our in-house gear manufacturing is especially valuable here, since many Philadelphia Gear parts are custom or long-lead items.
Emergency and rush Philadelphia Gear repair
When a main drive goes down, production stops. We provide 24/7 emergency service, 24–72 hour rush repairs on qualifying jobs, and emergency pickup & delivery to our shop nationwide. Turnaround depends on equipment condition, required parts, job complexity and availability — large custom units may take longer, and we will tell you honestly up front. All work is performed at our Rialto, CA shop — we do not repair equipment on your site. Request a quote with your unit's details and failure symptoms.
Need this unit back in service?
Call now or request a quote — emergency pickup & delivery available nationwide.