The cheap parts that kill drum line uptime

I keep seeing uptime losses on drum and pail fillers traced to ten-dollar parts. Not PLC logic, not the filler head. It is the little things that slip.

Examples: M12 cordset on the infeed photoeye at the scale with a loose strain relief, causing phantom indexes. Adhesive PE brackets creeping on oily UHMW. Auto drain on the FRL stuck half open, starving lance retract. Belt lacing before the scale that bumps the pallet and makes zero wander.

Two fixes that paid back fast: move flow controls and add a quick-exhaust at the lance cylinder to cut retract by 300 ms without slamming. Swap to bolt-on PE mounts with a dowel, not tape. Add a drip shield over connectors near caustic rinse.

I built a 15-minute weekly walk: tug every cordset at a sensor, check FRL drains, verify scale bubble, look for cracked cable glands, and re-zero recipes. What low-cost checks have you baked into your lines, and what silent killers did you root out?