Welcome to the Message Board Salval.
There's more to it than lubricating the motor which not only moves the hands but winds the mainsprings that operate the chime and strike trains.
Your photo don't reveal enough of the movement to identify which movement you have only the old Holtz-Kurz Sangamo motor.
Is the movement in your clock of the type that has a couple of winding knobs on the back side? Those knobs pre-wind the time and strike mainsprings. The grinding sound may be on account of the motor trying to wind these springs.
I notice in your photo that the motor pinion drives a large fiber-plastic gear. It looks dry. Normally the gear and pinions in a clock must never have oil or grease on the teeth. However, the fiber-plastic gear on this particular application should have a very light grease or heavy oil on its teeth. All other gears and pinion teeth must be dry else they accumulate abrasive dust. The fiber-plastic gear on this clock movement is an exception.
Another photo of the back of the movement please.