Articles · Buyer decision · 2026-09-13
Maintenance is the largest variable in filling machine total cost of ownership. Here is what to budget for, what to check and what to replace — and when.
A filling machine is a long-term asset — most units run for 10–15 years. The purchase price is a fraction of the total cost of ownership. Maintenance labour, replacement parts, unplanned downtime and product waste during changeover or repair can exceed the original machine cost within the first five years. Understanding maintenance requirements before you buy is the single most effective way to control lifetime cost.
Every filling shift should begin and end with a short maintenance routine. These tasks take 10–15 minutes but prevent the majority of unplanned stops:
| Interval | Task | What to check |
|---|---|---|
| Weekly | Seal and gasket inspection | Replace any seal showing flat spots, cracks or chemical swelling |
| Weekly | Drive belt / coupling check | Tension, alignment, wear marks |
| Monthly | Pump head clearance | Measure rotor-to-casing clearance; compare with manufacturer spec |
| Monthly | Electrical connections | Tighten terminal screws; check for heat discolouration on contactors |
| Monthly | Lubricant condition | Check oil colour and viscosity; change if cloudy or contaminated |
Once a year — ideally during a planned production break — the filling machine should receive a full service. This includes replacing all dynamic seals, checking bearing play, re-calibrating the servo drive, inspecting the pump head for wear, and verifying filling accuracy against a reference scale. An annual overhaul typically costs 5–10% of the original machine price, but it extends service life by years and prevents accuracy drift.
A practical spare parts budget is 2–4% of machine value per year. The highest-wear items — seals, gaskets, O-rings, nozzle tips — should be kept on site. Larger components like pump heads, servo drives and PLC modules can be ordered from the supplier with a 1–2 week lead time, as long as the supplier guarantees parts availability for the machine's expected service life.
Grounton Pak's metering-grade fillers are designed so the annual overhaul stays predictable — dynamic seals and valve seats are listed with part numbers in the maintenance manual, and the servo drive reports its own diagnostics for remote fault finding.
Every Grounton Pak filling machine ships with a maintenance manual covering daily, weekly, monthly and annual tasks. Spare parts lists with part numbers are included. Remote diagnostics via the servo drive's communication interface allows our engineering team to assist with fault finding without a site visit. For customers who prefer outsourced maintenance, we offer annual service contracts covering scheduled inspections and priority spare parts supply.
Grounton Pak (Hebei Guangteng Machinery Equipment Co., Ltd., brand GROUNTON) has built metering-grade rotor pump filling machines since 2013 — more than 40,000 units delivered, with ±0.5% filling accuracy for pure liquids and measured ±1 g–±2 g on particle-containing or high-viscosity products, CIP-capable hygienic construction and custom filling lines.
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