A coupling assembly for a machine includes a work implement having a float mode, in which the work implement moves relative to the machine, and a lock mode, in which the work implement has a fixed position relative to the machine. A pin assembly connects the work implement to the machine and itself is movable between a float position, in which the pin assembly supports the work implement in the float mode, and a lock position, in which the pin assembly supports the work implement in a lock mode. A retainer has a float assembly configuration, in which the retainer holds the pin assembly in the float position, and a lock assembly configuration, in which the retainer holds the pin assembly in the lock position, thereby facilitating adjustment of the work implement between float and lock modes.
