Pick-up
Coordinate free equipment or component pick-up when applicable.
24-Hour Rush Repair
Independent Komatsu service · Fontana, CA
Komatsu Equipment Repair in Fontana
Komatsu iron — WA wheel loaders loading aggregate all over the Inland Empire, PC excavators, D-series dozers — is built heavy and built to be rebuilt. Our Fontana shop repairs Komatsu equipment across engines, hydraulics and drivetrains, with in-house machining and gear manufacturing behind the work: when a Komatsu component is worn past a seal kit, we can rebuild or remanufacture it instead of waiting on a replacement. Independent shop — not a Komatsu dealer.
Independent Komatsu service · Fontana, CA
Komatsu work we do every week
Hydraulic main pumps, swing and travel motors on PC excavators; lift and steering cylinders on WA loaders (cylinder rebuilding is core work here); Komatsu diesel engine repair; torque converters and transmissions; undercarriage and final drives; and the pin, bushing and line-boring work that high-hour machines need. Big iron earns nothing parked — the whole shop is set up to turn it around.
Brands we serviceKomatsu
Komatsu Equipment Repair in Fontana · Fontana, CABuilt for the big machines
A WA470 with a weeping lift cylinder or a PC machine with a tired swing motor needs a shop with machining depth, not just a parts account. We document the failure with photos and video, quote in writing, and rebuild to standard — with worn components measured and shown to you. Free pick-up and delivery when applicable, Monday–Friday 6 AM–5 PM regular hours, and a 24-hour rush line that runs 365 days a year.
- WA wheel loader hydraulic and drivetrain repair
- PC excavator pumps, swing and travel motors
- Cylinder rebuilding and re-rodding in-house
- Komatsu diesel engine repair
- Final drives, undercarriage and line boring
Our 8-step repair process
A clear path from the first call to a tested component or machine returned to work.
Inspection
Disassemble and evaluate the complete failure.
Photos & video
Document condition and findings for a clear repair conversation.
Repair quote
Define the recommended work and quote before proceeding.
Approval
Confirm scope, urgency and the practical path forward.
Manufacturing
Machine, weld, rebuild or reverse engineer required components.
Testing
Verify operation and workmanship before release.
Shipment
Return the completed component or equipment to service.
Frequently asked questions
Are you a Komatsu dealer?
No — we are an independent repair shop that services Komatsu equipment. No affiliation is implied; the quality of the work is the whole pitch.
Do you rebuild Komatsu hydraulic cylinders?
Yes — cylinder disassembly, measurement, resealing, re-rodding and honing are done in-house, including large loader and excavator cylinders.
Can you service Komatsu forklifts too?
Yes — Komatsu forklifts, including engine, mast and hydraulic work, are serviced alongside the construction line.
Related services
Emergency breakdown? Call the 24-hour rush line.
(949) 400-2937Schedule service or open a repair order
Request a service call.
Include the make, model, symptoms, location, urgency and preferred service time. Your details open in a text to John so you can review them before sending.