If the tech did not properly bleed the hydraulic system after pump replacement then yo7 most likely have air in the system..
It takes about 5 complete cycles...cycle being In and Out for the slides and the landing gear to properly purge the hydraulic system..Repalc8ng the pump most certa8nky did put Air into the entire system and bleeding properly ma6 fix issue..
If problem perisi5 after tha5 I’d have t8 be look8ng st the retract solenoid for that slide. If he replaced pump was it just the pump or was it the pump and manifold.