Dial Feels Wrong After a Lock Swap
A technician replaces a failed mechanical combination lock on a small business safe with a new lock of the same model family. After installation, the dial feels slightly stiff and the lock opens, but the technician notices the dial does not spin as freely as expected and the opening index does not line up exactly with the previous mark. The spindle appears straight. The technician torques the mounting screws firmly and the condition persists. The customer needs the safe operational today.
1. What should the technician check before declaring the job complete?
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Check: (1) Spindle length and seating - an over-long or mis-seated spindle can preload the wheels and cause stiffness; verify the spindle engages the drive cam correctly and is not bottoming. (2) Mounting screw torque - over-tightening the lock case can distort it and bind the wheels; back off to the manufacturer's specified torque. (3) Dial ring alignment - the index mark should be set per the lock manufacturer's instructions, not merely matched to the old mark; a shifted ring changes the combination reference. (4) Wheel pack and drive cam orientation - confirm the wheels are in the correct order and the drive cam is properly seated. (5) Lubrication and contamination - use only the lubricant specified for the lock. (6) Function test through multiple full cycles, including a change-key or reset procedure if applicable. Do not release the safe to the customer until the dial action and index alignment are correct and the combination has been verified several times.
2. The customer wants the safe back immediately. How should the technician handle this?
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Explain that a stiff dial and misaligned index are symptoms that can lead to a lockout or a lock that fails under use, and that releasing the safe in this condition shifts the risk to the customer. Offer a realistic completion time - often the remaining checks take minutes - and if a part is needed, provide a clear timeline. If the customer insists on taking the safe, document the condition, the recommendation, and the customer's decision in the service record, and do not represent the job as complete. Professional practice favors correcting the installation now rather than a return call later.