Maboe was transferred to Sundowns last week after two impressive seasons with the Team of Choice.
Buchanan, who was signed in the off-season as a free agent after leaving Kaizer Chiefs, performs a similar attacking role in the engine room.
The former Bloemfontein Celtic playmaker showed some neat early touches on his debut in the season-opener with Golden Arrows on Sunday, but his influence faded and he was replaced at half-time by Tlou Masegela at Harry Gwala Stadium.
“I wouldn’t say necessarily to fill the void that he [Maboe] left,” Buchanan said when asked about the club's expectations of him.
“I mean, whenever you come to another team and you come from one of the 'Big Three' there’s always pressure, irrespective of what team you are playing for.
“There’s expectations and it’s part of our job. And yes, we lost a brilliant, brilliant player. As a team we happy for him but our focus doesn’t lie over replacing him or me asking myself ... we are just moving on as a team.
“And obviously with the quality that we also have within the squad; you saw the boy that came in Tholang is good, young. So there’s a lot of other things to be excited about within the squad.”
Meanwhile, the 26-year-old is naturally pleased to be playing again after barely featuring in a two-year stint with Chiefs. His last appearance for Amakhosi came in August 2017 against Celtic.
“[A] lot of bleak days but there’s no use in sulking about it; it’s my job, it's my profession,” he said regarding his lengthy spell of inactivity.
“I need to be there playing so I can provide for my family, so obviously I’m happy to be back.
“It was difficult to be out for that long and coming back I’m not expecting miracles immediately. But I’m fortunate to have the confidence of the coach and he knows how to get me to my best.”
Fadlu Davids’ men will look to bounce back from the 2-0 defeat to Arrows against Free State Stars tomorrow at Goble Park Stadium (19h30).