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24-Hour Rush Repair
Pump repair · Hamilton
Hamilton Pump Repair in Fontana
A tired Hamilton pump rarely quits without warning — it loses flow, loses pressure or vacuum, runs noisy and hot, and only then stops the process behind it. We repair and rebuild Hamilton pumps working in vacuum pumps in laboratory, medical-support and light industrial process service at our Fontana shop — strip, measure, renew the wear parts, reset internal clearances and test the finished pump so it goes back to work doing what it was built to do. Everything is done at 14166 Whittram Ave by the crew that quoted it, with no work farmed out.
Pump repair · Hamilton
Where Hamilton pumps lose their edge
The pattern we find at teardown on Hamilton units is vane and rotor wear in dry and lubricated vacuum service, inlet contamination damage, and seal leakage that caps ultimate vacuum. Rather than swapping parts on suspicion, we measure first — rotor, vane, piston and wear-plate clearances where they apply, shaft runout, bearing condition, seal faces and housing wear — then quote the renewal the measurements actually justify. Machining and manufacture happen in-house, so a worn shaft, a scored housing bore or a discontinued wear part is a shop job here, not a reason to scrap the pump. Rebuilt pumps are assembled with new seals and bearings, clearances set to specification, and test-run — flow, pressure or vacuum checked against the duty — before they leave Fontana.
Brands we serviceHamiltonGouldsVikingWaukeshaBlackmerGracoBusch
Hamilton Pump Repair in Fontana · Fontana, CARebuilt, tested and ready to go back on the line
Our shop hours are Monday to Friday, 6 AM to 5 PM, and rush and emergency pump service runs 24 hours a day, 365 days a year — because a dead pump rarely picks business hours. Call John Clark's team on (800) 821-3404 or (949) 400-2937, or write to [email protected], for a free quote.
- Hamilton pump strip, measurement and full rebuild
- Wear parts, seals and bearings renewed from measured findings
- In-house machining for worn or discontinued parts
- Clearances reset to specification and test-run before release
- 24-hour emergency pump repair, every day of the year
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
Is a Hamilton vacuum pump worth rebuilding for lab service?
If the housing and rotor are sound, yes — vanes, seals and bearings renewed and clearances reset typically restore ultimate vacuum for well under replacement cost.
Is my pump worth rebuilding or should I replace it?
If the housing, rotors and shaft are sound, a rebuild with renewed wear parts usually restores full performance for less than replacement — we measure first and tell you plainly which side of that line your pump is on.
Do you offer emergency pump repair?
Yes, 24 hours a day, 365 days a year. Call (800) 821-3404 or (949) 400-2937.
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.