OOC:
In response to your first question, @C1NDER, and to the others who want to know about trying to fix the tractor:
My call is that this will require a
HEAVY MACHINERY roll.
The conditions outside are the normal bleak very windy rainy LV-426 weather, and you don't have the a full set of good tools to do it - you'd have more luck back at the base. Thus, this roll will be difficulty "Hard" which means you'll roll two fewer dice than otherwise.
So if Holryod makes the roll, and is playing as an 'out' android this will be a dice pool of
7 (Atribute STR) + 3 (Skill Heavy Machinery) -2 (Hard difficulty) + potentially three extra dice if three others offer to help before @C1NDER posts their roll.
No option to push the roll if it fails, if they are an out android. And if he fails, then no one else can try the same action again unless the situation changes a lot.
In response to your second question:
There isn't a supply problem for walking on to either Processor 9 or back to Hadley's Hope main base. You can walk around outside OK, breathe the air (even though it's filthy). It would take 8 hours to walk back to Hadley's Hope main base, 20 hours (so you'd be exhausted when you got there) to get to Processor 9. But you can survive both walks with very little food and water - it just will be unpleasant.