Description
Fluke 718-300G Pressure Calibrator Repair
The Fluke 718-300G is a pressure calibrator with an integrated hand pump – the pump, the sensor and the mA loop electronics all live in one handheld body, which is what makes it a genuinely one-handed field tool and also what gives it a failure mode the pumpless models do not have. At 300 psi it covers the middle of most plant work, where it sees the widest variety of connections and therefore the most wear on ports and fittings.
Certified technicians at June Company service the Fluke 718-300G for process technicians, refinery and plant instrument crews, and field calibration teams. Every instrument is repaired at component level and verified against reference standards before it ships back, with the measured results documented.
Common Fluke 718-300G problems we fix
- Vacuum side not pulling – the pump’s vacuum path specifically, which often fails while the pressure side still works.
- Pressure readings drifted out of tolerance – sensor drift, corrected and verified.
- mA loop or 24V supply faults.
- Fine-adjust vernier seized – the adjustment screw no longer trimming pressure smoothly.
- Pump will not build or hold pressure – worn pump seals and O-rings, the single most common 718 repair.
- Slow pressure decay – a leak in the pump body, manifold or fittings – the unit builds pressure then bleeds off.
FAQs
How long does a repair take? Most are completed in 5-10 business days. You get a firm quote after evaluation and before any work starts.
Can you work on an instrument that is out of warranty or discontinued? Yes. Most of what we service is past its manufacturer support window, and component-level repair is exactly what that situation needs.
Every repair carries a 90-day parts-and-labor warranty, with a firm quote before any work begins. Email us or submit a service request.





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