Seal Set of PM First Boom Arm (445777)

Seal Set of PM First Boom Arm (445777)

Engineered to precise OEM standards for Putzmeister truck-mounted concrete pumps, our Seal Set of PM First Boom Arm (Part No: 445777) ensures zero hydraulic bypass and stable holding power for the heaviest-loaded stage-one boom lift cylinder.

Fabricated from premium polyurethane rod seals, PTFE bronze-filled guide bands, NBR wipers, and high-tensile backup rings, this repair set reliably withstands severe pressure spikes up to 350+ bar and heavy mechanical cantilever loads. Its precision-profiled wiper prevents job-site slurry and grit contamination, stopping cylinder rod drift and extending hydraulic barrel life under demanding concrete-placing conditions.