Sadly not. I have just re examined the crew lists and it looks like they missed serving together by one voyage. According to the records your grandfather signed on to the Oribita on 3rd August 1923, arrived in New York on the 13th August and was on the Deserting Crew List on 18th August, which was probably the date the ship left to return to Southampton/Hamburg. Your grandfather only did one voyage, one way.
My Great Uncle signed on for his first voyage on 7th September in Southampton! That must have been after the ship returned home from your Grandfathers trip (and desertion) in late August! Silas then did another voyage in October and a final one docking in New York on the 1st December 1923. He is on the Deserting Crew list on 5th December.
A small world and a shame they wouldn't have met. I have often looked at the other names on the Deserting list in December and wondered if he went with them!!