Grady Franklin Maples, regional director for the Department of Housing and Urban Development in Denver, is expected to be replaced this week despite his efforts to persuade new HUD Secretary Jack Kemp to keep him on, a Denver newspaper reported.

Maples, 73, who has held the post since 1982, is responsible for administering 554 employees in the six-state HUD region that includes Colorado, Wyoming, Utah, Montana, North Dakota and South Dakota.A total of 125 top HUD officials appointed by President Reagan were asked recently to submit resignation letters as part of the change-of-administration protocol.

But Maples, who earns $78,585 per year, last week received word from Kemp that his resignation would be accepted, according to the Rocky Mountain News.

The News quoted sources close to HUD as saying Maples paid his own way to fly to Washington Feb. 16 to meet with Kemp and discuss remaining on the job. But Maples was not able to convince Kemp to keep him on, the News reported.

Besides being known as the regional HUD administrator, Maples also has a reputation in Colorado as a broadcaster. Maples is now president of La Junta Broadcasters Inc., licensee of radio stations KBZZ and KBLJ in La Junta, Colo.

Last January, federal authorities investigated Maples in the failure of Arapahoe Industrial Bank in Littleton. He was named in a complaint filed in Denver U.S. District Court against Robert S. Hart, former bank president.

Last April, Maples filed for reorganization under Chapter 11 of the federal bankruptcy law, listing debts of $1.9 million and assets of $628,000.