Inspect shipping container doors at least every three to six months in ordinary stationary storage, and immediately after delivery, relocation, impact, flooding, freeze-thaw movement or any change in how they close. That interval is a practical maintenance starting point, not a manufacturer rule: coastal exposure, frequent access, dust, ice and uneven supports justify shorter checks, while the unit’s actual condition determines what work is due.
Build the interval around use and exposure
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Request my free quote A five-minute door check reveals most developing faults
Separate alignment from lubrication
Service only the parts that need service
Winter maintenance begins before the doors freeze
Keep a defect history, not just a grease date
Plan a door-condition review
Describe how often the unit is opened, the exposure, the exact point of resistance and any support movement. Photos of both leaves, hinges, cams, keepers, seals and threshold help separate adjustment from repair.