Preventive Maintenance Checklist for Stationary Concrete Pumps

Maintaining a stationary concrete pump in peak operating condition requires a disciplined preventive maintenance schedule. The extreme abrasiveness of concrete aggregate combined with hydraulic pressures exceeding 200 bar means wear is relentless. ### 1. Daily Pre-Pour Checks - Check hydraulic oil level and ensure oil temperature gauge is working. - Inspect the water box: ensure clean water and inspect for hydraulic oil sheen (which indicates failing rod seals). - Test accumulator pre-charge pressure before pumping begins. ### 2. Spectacle Plate & Cutting Ring Inspection Measure the gap between the cutting ring and wear plate. If aggregate paste is squeezing past the S-tube seal into the hopper, cavitation and rapid wear will result. Tighten tension bolts or replace the rubber spring buffer promptly. ### 3. Pipeline Clamp Integrity Never use damaged or deformed snap clamps. Ensure safety wedge pins are inserted in every coupling on high-pressure ground and riser lines.