After I realised the power steering hose was leaking on our Ford Focus I did some searching but didn’t manage to find a decent DIY so here are a couple of useful pointers if you decide to tackle this job.
For the 2007 2nd generation model you need hose PN. 1743278 and connector PN. 4747355 (this is the 18mm nut the pipe slots into on the pump), the nut is slightly thicker than the original and the pipe nozzle that fits into it is also a tad longer. Cost for both was £138.25 from local Ford dealer.
You need to remove a cover underneath the engine, driver side headlight and move the coolant and power steering reservoirs to give better access.
You don’t need to remove the serpentine belts, apparently the 2007 model has “stretch” belts which are a real pain so leave well alone! I’d never heard of these before and they sound ridiculous but I’m sure they're a great idea I don't know if all cars use them these days.....
The old hoses are secured to the chassis at 3 points and are accessed from under the car. The one furthest back was quite corroded and the other 2 were ok to remove.
The pipes are easy to remove underneath to the rear of the engine bay but the 2 in the engine bay were a challenge. There’s probably a simple technique to removing the spring clip holding the reservoir hose in place but I eventually dremelled it in half (new hose hose one fitted). The really tricky one was trying to cut the metal pipe (as suggested in other threads and recommended by my friendly Ford mechanic) when I enquired how he said to use an air hacksaw.....hmm, not sure how many people have one of these at home! Luckily I have a dremel and 3ft flexible extension which I’ve never used in anger before but it was the only way I could get to cut the pipe and you also have to cut the metal bracket before you can get an 18mm socket on the old connector nut to remove it.
Screw your new connector nut in and then struggle to install the hose/pipe contraption from underneath the car, curse the Ford engineer who came up with such a crap design as you persuade it into position. I found the rear pipe fittings relatively easy but don’t bolt up the chassis mountings until the pipes are home as the whole lot is under a bit of tension when all fitted (probably explains why they seem to fail quite regularly). Reservoir hose is a simple push fit and then we get to the pipe into the steering pump....first off I presumed you placed the pipe into the connector nut and “pulled” it in by tightening up the 10mm bolt attached to the bracket - this cunningly drags the pipe in at an angle and it won’t seat correctly. You actually need to push the pipe fully home into the connector nut first and it’s a very tight fit even after coating with silicone grease. Once you’ve clicked the pipe in you simply tighten up the 10mm bolt, tighten up the 3 chassis connections and put the reservoirs and headlight back in place.
Run the engine for a minute, check to make sure there are no leaks and top up the power steering fluid.
Hope this helps someone, my local Ford dealer said they do at least one of these hoses a week....