Originally Posted by 48ratfink
"There is an adjustment bolt for the power steering pump on the inboard side of the pump, and the pivot bolt for it is reachable under the RV. This is the first belt to go on...use a pry bar from above under the pivot bolt, and rock it back against the water pump housing, then tighten the adjustment bolt, and go back under and tighten the pivot bolt. On ours, the adjustment bolt was 5/8, and the pivot bolt was 15mm of all things.
The adjustment bolt for the air conditioning compressor is easier, and this is the second belt to go on. The pivot bolt for the air is on the bottom left corner of the ac compressor, looking at if from the back. The adjustment bolt is on the top right corner, and has a tensioner built in, so you don't have to pry it against anything, just loosen the big bolt, and get a 7/16 socket on the tensioner bolt and crank it down until the belt is tight, then tighten the big bolt and the pivot bolts, both 9/16.
The adjustment bolt for the top AIR pump is 1/2 inch, located on the right side of the pump, and the 1/2 pivot bolt is located on the left side of the pump. You can use a pry bar against the metal bracket to the right of the pump, but I used a piece of wood on top of that bracket to raise the pivot point and keep the pry bar from sliding while tightening the bolts. This is the third belt to go on.
The adjustment bolt on the alternator, also 1/2 inch, is located on the left side of the alternator, and the pivot bolt is located on the front bottom right. This is the last belt to go on. You can pry against the same bracket, through the hole, that you tightened the AIR pump with. Once you get the adjustment bolt tightened, you'll have to tighten the 1/2 inch pivot bolt with a box wrench, since the belt goes in front of it and you won't be able to get a socket on it.
All in all not a very difficult job at all, and I could probably change out all the belts the next time in less than an hour"