This quest is given by the Cpl. William Farber on the concourse at Camp McCarran. He asks you to help fix the food processor, and gives you a list of the parts necessary to fix it. You can either jury rig the fix (repair skill of 80 required) or find these items:
There is no advantage to doing this the hard way, and in fact the 80XP for passing the skill test is the only XP available for this quest.
Most of the components can be found inside REPCONN.
Most everything can be found on site in Camp McCarran, only some of the items must be stolen.
A regular pot can be found in the cooking tent in the camp along with one pressure cooker, both not marked as owned, hence free for the taking. Second Pressure cooker is sitting in the canteen right opposite the food processor on top of an oven (must be stolen). Another pot is also in the canteen but must be stolen (only need one, so take the free one).
Both pilot lights can be obtained from ovens opposite the food processor (must be stolen).
One steam gauge assembly, five scrap metal, and one conductor (and a number of other needful things) are on shelves in the corner of the camp next to the terminal building on the entrance side, all un-owned.
The other steam gauge assembly can be taken freely form the top of a shelf next to the dummy soldier in the camp in front of the tents to the right (as seen from the entrance), there is also another one in one of the tents but that one must be stolen.
The other conductor is in the left tent second row back from the camp entrance on a table with some loot.
The firehose nozzles can be stolen out of the two firehose boxes on the ground floor of the terminal building.
Most, if not all, the items on the list can be found in Vault 11.