What must be done to the ram locking nut on collet-equipped jacks to prevent removal?

• A. Welded to the ram
• B. Left loose
• C. Peened or staked to prevent removal from the ram
• D. Painted for identification

Answer: (C)

When you need a fastener to stay put under vibration and handling, you lock it in place with a permanent deformation method rather than relying on threads alone. Peening or staking the ram locking nut creates a mechanical interference that prevents rotation and removal from the ram. This keeps the collet secured during service without requiring a future teardown to re-torque or replace the nut. Welding would permanently fix the nut but makes servicing impractical and can affect adjacent parts or heat-affected areas. Leaving it loose offers no retention at all, and painting doesn’t prevent removal. Peening or staking provides a reliable, maintenance-friendly way to ensure the nut stays in position.