Collection
Where it applies, we arrange collection of the machine or part at no charge.
Round-the-Clock Rush Repairs
Fontana, CA · Independent Komatsu service
Komatsu Equipment Repair in Fontana
Komatsu iron — WA wheel loaders shifting 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 standing behind the work: when a Komatsu component is past what a seal kit can fix, we can rebuild or remanufacture it rather than wait on a replacement. An independent shop — not a Komatsu dealer.
Fontana, CA · Independent Komatsu service
The Komatsu work we handle week in, week out
Hydraulic main pumps with swing and travel motors on PC excavators; lift and steering cylinders on WA loaders, cylinder rebuilding being core work here; Komatsu diesel engine repairs; torque converters and transmissions; undercarriage and final drives; and the pin, bushing and line-boring work high-hour machines need. Parked iron earns nothing — the whole shop is arranged to turn it around.
Brands we serviceKomatsu
Komatsu equipment repair · Fontana, CASet up for the big machines
A WA470 weeping at a lift cylinder, or a PC machine whose swing motor is tired, needs a shop with machining depth — not just a parts account. We document failures in photos and video, quote in writing, and rebuild to standard, with worn components measured and shown to you. Pick-up and delivery are free where applicable, regular hours are Monday–Friday, 6 AM to 5 PM, and the 24-hour rush line runs 365 days a year.
- Hydraulic and drivetrain repairs on WA wheel loaders
- Pumps, swing and travel motors on PC excavators
- Cylinders rebuilt and re-rodded in-house
- Komatsu diesel engine repairs
- Final drives, undercarriage work and line boring
How a repair moves through our shop — 8 steps
From your first phone call to a machine or component that's been tested and put back to work, here's the route every job follows.
Teardown & check
We strip the unit down and assess the full extent of the failure.
Photo & video record
We photograph and film what we find, so the conversation about repairs starts from clear evidence.
Written quote
We spell out the work we recommend and price it before anything goes ahead.
Your go-ahead
Together we confirm what's being done, how urgent it is and the most sensible way forward.
Machine shop work
Components get machined, welded, rebuilt or reverse-engineered as the job requires.
Bench testing
Nothing leaves until operation and workmanship have both been checked.
Return
The finished part or machine goes back to you, ready to return to service.
Questions owners ask us
Is your shop a Komatsu dealership?
No — this is an independent repair shop that services Komatsu equipment, with no dealer affiliation; the standard of the work speaks for itself.
Do Komatsu hydraulic cylinders get rebuilt here?
They do — stripping, measuring, resealing, re-rodding and honing cylinders all happens in-house, large loader and excavator cylinders included.
Will you service Komatsu forklifts as well?
Yes — engine, mast and hydraulic work on Komatsu forklifts is handled here alongside the construction range.
More services to explore
Down right now? Ring the round-the-clock rush line.
(949) 400-2937Book a service visit or start a repair order
Ask for a service visit.
Tell us the brand, the model, what's wrong, where the machine sits, how urgent it is and when you'd like us there. The form opens your details as a text to John, so you can check them over before you hit send.