Putzmeister Spare Parts Pumping Relay 278495007 RB1017400

This step pumping relay carries dual part codes 278495007 and RB1017400, a factory-spec electric spare exclusively engineered for multiple generations of Putzmeister stationary and truck-mounted concrete pumps. It installs inside main control cabinets to govern core pumping circuit switching for feed and main pump assemblies.

Rated at standard 12VDC single change-over contact layout, the component adopts reinforced enclosed plastic casing to block concrete dust, splash moisture and site vibration common on construction sites. Internal silver-alloy contact cuts arc wear amid frequent cyclic switching during continuous concrete pumping shifts.

It directly replaces original OEM units for routine overhaul, fixing common breakdowns like intermittent pump startup or unstable pumping stroke switching caused by aged stock relays on used PM pump fleets. No cabinet wiring modification is needed for plug-in field fitting.

Each finished piece undergoes full voltage and load switching testing before stock release, matching original factory tolerance to sustain steady performance under fluctuating construction-site power input. Strict component screening lowers early failure rate for heavy daily pumping workloads.

Widely stocked for global machinery repair shops and pump rental teams, this cross-code relay stays one of the most in-demand small electric spares for quick on-site troubleshooting and component renewal of Putzmeister pumping systems.