Drop Rod Upkeep on a Double Gate
The inactive leaf on a pair of gates does very little and is therefore inspected by almost nobody. That is the reason Gate Maintenance Mount Pleasant, SC thetaxpayers treats the drop rod as a scheduled item, since a Mount Pleasant gate pair with a rod that no longer seats puts every closing load onto the hinge of the active leaf instead.
What the Rod Is Doing
The drop rod turns two independent leaves into one fixed post and one moving gate. With it seated, the active leaf latches against something solid. With it unseated, the pair behaves as two heavy pendulums that meet in the middle, and the latch, the hinge and the frame all take loads they were never sized for.
Why the Sleeve Fills
The ground sleeve is a vertical hole in a driveway, so it collects sand, shell, leaf litter and standing water by design. On a coastal site it also collects salt, which corrodes the rod at exactly the depth where it sits. Within a season a sleeve can shallow by an inch, and the rod then rests on debris rather than dropping home.
Clearing It
Lift the rod, run a length of stiff wire or a long screwdriver down the sleeve to break up the packed material, then flush it with a hose until water runs down and stays down. If water sits in the sleeve, the drain at the bottom is blocked or there never was one, and drilling a weep hole is the durable answer.
The Rod Itself
Check the rod for pitting along the buried section and for a bent tip, which is what happens when somebody forces it into a partly blocked sleeve. Galvanized or stainless rod lasts several times longer than plain steel here. Clean the guide brackets and use a dry film lubricant so the rod slides without collecting grit.
A Second Sleeve
Many pairs have a second sleeve for the fully open position, and it is forgotten completely. A leaf parked open in wind with nothing holding it swings hard against its stop, and that impact is a common cause of a cracked weld at the top hinge bracket.