--Part in Act 1 is
Side quest: Little Lost Ones (light all the Brazier's)
Dungeon: Widow's Veil
Region: Crows Pass
Part located: on the left side of the exit area a passage will open.
--Parts in Act 2 are
Side quest: (Hit all the Gongs around the room.)
Dungeon: Tower of the Moon
Region: Ossean Wastes(south end of town)
Part Location: to the right side of the exit area.
Side quest: Shadow of Skara
Dungeon: the Blood Hive (second floor)
Region: Salt Barrens (north side of town, second zone up)
Part Location: right side of exit break all the eggs.
--Act 3 Parts are
Quest related: This is part of the main quest.
Dungeon: Abadoned [cursed] Windmill.
Region: Blightbogs (south exit from town)
Part location: Read all diaries and release the 4 skeletons attached to wooden beams by axes. When all is done a door will open on the west side of the main map area. You have to collect this before teleporting to the boss, otherwise you have to enter thhe area again.
Quest Related: Second side quest in the quests given by/for Cacklespit
Dungeon: Cacklespit Realm
Region: Sundered Battlefield (north exit from town, second zone up)
Part Location: Destory all tree stumps in the zone, You will trigger a log bridge to be created in the center of the map leading to the north.
Quest Related: Main Quest Last quest befor you unlock Act4.
Part Location: obtain power source as part of the Main quest. If you have already turned the powersource in then just go talk to the NPC and the robot will be constructed.
Your now Done collecting parts, 5 in total you should see them in your "Q"uest log on the tab for the robot quest.
The Turn in NPC is located in the act 3 town.
Enjoy your rewards