Used Bottling Equipment Checklist: What to Inspect Before Buying

A used bottling machine that looks cheap can cost more than a new one once worn parts, unsupported controls and missing change parts surface during commissioning. Inspect the mechanics, controls, tooling and utilities on site, and price the work to get the machine running before you agree a purchase price.

Whether you are buying a standalone rotary filler, a monoblock rinser-filler-capper or a complete line from a decommissioned plant, this framework lists what to check before signing.

Quick inspection summary

Copy or print this checklist. For each row, enter a site decision (accept / repair and retest / hold), the inspector and date, and an evidence filename. Blank fields remain unresolved.

Takeaway: Copy this table into your inspection notes and record evidence for every row before negotiating.

1. Mechanical Condition and Wear Analysis

Check the wear parts that need costly teardowns first, because liquid bottling combines repetitive motion with constant moisture:

• Rotary carousel cam tracks and cam rollers: In rotary fillers and cappers, cam tracks set nozzle descent and timing. Inspect track surfaces for scoring, pitting or uneven wear. Excessive play in cam follower bearings causes inconsistent fill heights and erratic capping torque.
• Filling valves and diaphragms: Disassemble a sample of valves, chosen with the maker’s inspection guidance and the machine’s service history, and widen the check if you find wear; a few good valves do not prove the rest are sound. Check stems for axial play and seats for erosion or wire-drawing grooves. On counter-pressure fillers for carbonated products, inspect snift valves, vent tubes and seal seats. Confirm that replacement seals and diaphragms in the required elastomers (EPDM, FKM/Viton or PTFE) are still available.
• Capping heads and clutches: Examine magnetic or mechanical clutches on screw cappers and measure torque repeatability across heads with a calibrated torque tester. On crown cappers, inspect crimping jaws for cracks.
• Product-contact metallurgy: Identify the stainless grade of product-contact parts and check it against your product’s acidity and chloride content and your cleaning and sanitizing chemicals. Molybdenum-bearing grades such as 316/316L are used where corrosion demands are higher, for example with chlorides, while 304 is widely used in food and beverage equipment; ask the original maker or a hygienic-design specialist where the product or cleaning regime is aggressive. Inspect welds inside bowls and manifolds for crevice corrosion.

Before planning floor layout, review planning a glass bottling line.

Compare the filler type against glass bottle filling machines and check closure handling against capping equipment.

Takeaway: Open sample valves and measure cam and capping wear; do not judge condition from the outside.

2. Electrical Controls and PLC Lifecycle

A mechanically sound machine can still be hard to keep running if its control hardware is no longer sold or supported:

1. Check the lifecycle status of the exact parts: Record the brand, family and catalog numbers of the PLC, I/O, HMI and drives, then check each against the vendor’s own lifecycle information. Status can differ within one platform. Rockwell Automation, for example, states that some SLC 500 Bulletin numbers are discontinued and no longer available for sale and encourages migration to CompactLogix 5380 controllers; that does not mean every SLC 500 part has the same status. Price any migration with an integrator against the actual I/O count and program.
2. Servo drives and motors: Check whether motion drives and motors are still listed in the vendor’s catalog. Discontinued drives bought on the surplus market can be expensive and slow to replace when they fail.
3. Insist on unlocked program files: Ask for an unpassworded, complete backup of the PLC logic, motion parameters and HMI application. If the program is locked by the original builder, format changes and troubleshooting may require contracting that builder.
4. Utility compatibility: Compare the nameplate voltage and frequency with your plant supply. Feeding a European 400 V, 50 Hz machine from a North American 480 V, 60 Hz supply needs a step-down transformer (480 V to 400 V), sized to the machine’s load. A transformer does not change frequency: an induction motor’s synchronous speed is proportional to supply frequency, so for the same number of poles it is 20% higher on 60 Hz than on 50 Hz (for example 1,800 rpm instead of 1,500 rpm for a 4-pole motor), and motors running directly on line turn roughly that much faster, depending on slip and load. That changes conveyor, pump and machine speeds and loads, so check motors, gearboxes, pumps, solenoid coils and power supplies with the maker; motors on variable frequency drives can usually be reconfigured.

Compare quote structures using the bottling equipment RFQ checklist.

Common mistake: Ordering a step-up transformer for a 400 V machine on a 480 V supply, or assuming a transformer solves the 50/60 Hz difference.

Takeaway: Check lifecycle status part by part, and match both voltage and frequency.

3. Tooling and Change Parts Completeness

Bottling machines use format parts machined for specific containers. Check each new bottle and closure against the installed format parts before assuming the machine can handle it:

• Timing infeed screws: Verify feedscrew pitch and profile match your container so bottles enter without collisions.
• Starwheels and center guides: Check pocket clearance; starwheels must guide containers without pinching or scuffing label panels.
• Capper chute and orientation feed: Check that sorting bowls and chutes match your actual closure drawing. See neck finishes and closures.
• Tooling availability: If the existing parts do not match your bottles, ask whether the original maker or a third-party tooling supplier holds drawings to make new sets, and ask for a price per format set for your bottles.

For format change procedures, review bottling line changeover best practices.

Your bottle specification checklist gives the dimensions to measure against.

Takeaway: Count and measure change parts against your own bottle drawings before agreeing a price.

4. Recommissioning Budget

The purchase price is only one line of the cost to get a used machine producing reliably. No fixed percentage split applies across machines, sellers and sites, so build the budget from quotes:

Keep all lines in the same currency and record whether tax and installation are included. Mark unquoted work as unresolved rather than zero. Compare the total with a quote for equivalent new equipment and its lead time. Tie payment release to a witnessed test run with water or product simulant at the speed you need.

Downstream equipment such as case packing and palletizing may also need adapting to the used machine’s speed.

Takeaway: Build the budget from quotes line by line rather than from rule-of-thumb percentages.

Record unresolved purchase decisions

When this does not apply

• New or factory-rebuilt machines sold with a warranty and current documentation; use the RFQ checklist instead.
• Small manual or tabletop fillers where controls and change parts are minimal; see small-scale bottling equipment.

Takeaway: Use this checklist for second-hand automatic machines with controls and format parts.

Method, limitations and sources

This checklist summarizes inspection practice for second-hand bottling machinery and vendor lifecycle statements. Costs depend on the machine, seller and site. Electrical points are general; confirm transformer sizing and motor suitability with the machine maker and a qualified electrician.

Sources (fetched October 7, 2026):

• SLC 500 Controllers, Rockwell Automation: status of SLC 500 Bulletin numbers and migration recommendation.
• Motor technical reference PR2525, Baldor: synchronous speed by pole count at 50 and 60 Hz.
• Supra range, Outokumpu: molybdenum-bearing 316-type grades for applications with increased corrosion-resistance demands.