I had a bit of a poke around in all the pipes on the crane and found that the long rod with the knobs on the ends is definitely the divert valve to send pressure to the outrigger legs. There is a long spring attached to it that pulls it back into the closed position. To drop or raise a leg, you would have to pull/push the rod, (depending on what side you were on), then twist the lever on the top of the leg to raise or lower it.
It's hard to tell if any of the connectors or fittings are leaking as the fluid leaking down from the control valves is covering everything.
Today I got the brake shoes and springs refitted to the intermediate axle and then got the bearings repacked and the hub refitted.
The axle went back in pretty easily and all the new nuts and bolts around the back of the hub got painted.

This is a pic of the passenger side as it was this morning. The chassis rail extension out the back got cleaned back and primed to see how it came up. The paint comes off easily enough with the wire wheel on the grinder, but it takes time to get around all the nuts, rivet heads and suspension hangers. Sand blasting these areas would be faster. I offered to "dispose" of around 1.2t of lead contaminated garnet grit for the guys at work, but they needed a certificate of some sort to say they had done it properly. I'm sure I could have knocked one up in Photoshop. Oh well.
I have now cleaned and primed the rail from the back to the chassis tie-down U-bolt that you can see just next to the toolbox. If the weather is ok tomorrow, I will have a go at cleaning up the springs and other bits, like the diffs and suspension linkages. I think it might be a lot easier once I get the tray off as I can sit under the truck without being hunched up or belting my head all the time.
At the moment I am trying to work out the order of priority for the things I need to do. As an example, I want the tray off so I can get at the diffs, transfer case, power dividers, winch and prop shafts. They all need cleaning and painting, and the transfer case needs new seals. I can do those without removing it.
Before I can remove the tray, I need to get the truck to the point that I can start it and drive around the paddock. To do that, I need fuel. Both tanks are now clean, primed and painted with 2 coats of the camo green. Yesterday I cleaned the 4 tank support brackets and gave them a good coat of Ironize to neutralise any surface rust.

As you can see in the After pic on the right, 2 of the brackets had the back plates removed. The rust had eaten into these plates as you can see in the pic on the left. The steel was spalling badly and the inside of the channel was packed with rust chunks. I couldn't leave them like that. I cut the welds and cleaned up the dags. The rust chunks inside were all from the back plate, The channel cleaned up nicely. The original back plates were 3.7mm thick and 100mm wide. I checked around and I can get either plain steel in 3 or 5mm, or galvanised in 5mm. Nothing in between. I think I will go with the heavier option, but can't decide on whether to get plain or galv. Galv is a lot dearer, but I only need 2m so it's not too bad. The 4 supports are going to be washed down with thinners to remove the varnish stuff left by the Ironize. It's done it's job of neutralising and converting any rust and the 2-pack Zinc-Epoxy I want to use on them needs bare metal to work properly. I will coat them in the epoxy and then cover that with primer, as the epoxy doesn't like Alkyd paints, and the Protec Camo Enamels are Alkyds. Once epoxied & primed, I can weld the new back plates on. I'll pre-paint them the same way as the supports and just grind enough away for the weld to stick to. I know the paint will burn with the heat, but it's better than not being treated at all. I don't want to have to do this again.
Before the tanks go back on, I need to refit the brake master unit. It's all painted and ready to go, but I need to clean and paint the chassis rail before I can put it back on. Too fiddly trying to work around it afterwards. I don't need brakes to move around the paddock. I'll just use the handbrake. I need to replace the brake lines that run from the master cylinder units to each axle and they are tucked up in the chassis rails and really hard to get at. It will be a lot easier with the tray off, so it can wait until then.
I also need to strip, clean, repaint and refit the driver's side intermediate axle hub, and drain the diff before refilling with new oil. I want to do that before moving the truck as I have done the passenger side and don't want nasty old dirty oil slopping across to that side as I have cleaned the axle tube out and the truck is leaning towards the driver's side.
So from all that, it looks like my first step is to clean the springs and suspension bits on the passenger's side, then prime and paint them. Then I can put those 2 wheels back on. Ah crap, another hitch. I have to wait until my new tubes arrive before I can put one of the tires back together. And I have to pull the old tube out of the one I have already changed. Should be easy enough now. That will be the third time I have changed that one. First time was a leaking valve stem that I missed. Second was when I replaced the leaky one with a spare that came with the truck, but no telling how old it is and the other 2 that were included are no good either. One split open along a crease and the other is perished and looks like crocodile skin.
Right. So clean/paint the spring and suspension, change the tube, fit a "new" secondhand PC50 tire to the second rim, refit both tires, drain the intermediate diff, pull apart/clean/overhaul/repaint/refit the driver's side intermediate hub, clean the driver's side chassis rail, repaint it, clean/epoxy/prime the fuel tank supports, weld new back plates to 2 of them, topcoat and refit them. Then I can refit the 2 fuel tanks and I can finally start the truck. Simple. Should have that done by winter.

While looking for something simple to do today, I knocked a hole in the deck to have a better look at the winch to see why the cable is so tight and why it won't wind out.

As you can see, the thimble on the end of the cable has been sucked into the rollers on the back and spread the plates that hold the guide wheels.
I tried levering it out and got nowhere, even with a full-length crowbar. The cable is so tight under the truck that it twangs when you tap it.

I reckon I found the problem. I'd say the overload cutout is disconnected or has failed as there is no way that it should allow it to put that much load on the winch.
Now for the scary part. The winch actuator is in the Engaged position. In fact, the damn thing is stuck there. I took the clevis pin out of the air actuator and pushed it out of the way. Oh, it slides in and out fairly easily, which is nice. There isn't a lot of room between the steel rails that hold the deck boards, but I was able to belt the actuator arm pretty hard with a 4lb hammer and it won't move. It's a bad design. The steel bar of the actuator is round with a flat machined down one edge. It goes through the aluminium housing and has a washer and split pin on the far end. It looks like the aluminium has grown onto the washer. I had to drive the shaft out of the winch from the MK3 and it looked similar to this one. I will try giving it a good squirt with CRC and see if it frees up a bit. What worries me is that when I fist got the truck, I was able to turn the driveshaft to the winch with a big screwdriver through the yoke, and later tried running the truck in reverse with the PTO engaged and it didn't move the winch drum at all. I could see the winch brake drum turning on the far side, so the main worm-drive shaft and the chain drive unit are ok. Thinking about it, the main worm could be damaged, or the worm gear wheel could be stripped. Or the spline in the middle of the worm gear could be stripped. Or the main winch shaft could have stripped the splines down where the dog clutch engages. Or the dog clutch could be stripped. Or the 2 lugs that bolt to the cable drum that the dog clutch engages could gave sheared their bolts. This would be the best scenario. I still have the winch from the MK3 in pieces and all it's bits are in really good condition, so I can make 1 out of the 2 if it's more serious.
Under the tray, bolted to one of the cross-members, is a roller for the winch cable. I can't really see much point as it doesn't really do anything. It has a grease nipple in one end and the winch cable had slid off the end of the roller and gotten hung up above the grease nipple. This meant all the cable was piling up at one end of the spool. I guess they must have winched in the cable with very little load and it would have flapped around, getting hung up like this. The next time they winched they weren't paying attention and sucked the thimble into the rear rollers and when the load came on, the cable cut down through the layers and has been there ever since.
I tried using tyre levers to pop the cable over the grease nipple, but I couldn't move it at all. Soon fix that. I got my arm up under the back and managed to cut the cable right up near the thimble. There was a LOT of strain on it. It was just like in the movies where a rope twangs and untwists as it is cut, only this was steel and close to my hand. Luckily, it didn't get me and I have only lost about 8" of cable. I still couldn't lever the thimble out. I'll have to try undoing the bolts holding the plates and rollers together to get a bit of room. Nothing is ever simple.
I tried levering the cable out of the drum once the strain was off the rope, but there is just no room to manoeuvre until the tray is off or the winch is out. Thinking about it, I will try to get the cable free before dropping the winch. Once I get the thimble out of the rear rollers, I can refit it to the end of the cable, but right up close to the drum, then hook it to my hand winch and try pulling it out. If I can turn the winch drive and the drum doesn't turn, then there should only be a bit of friction holding the drum and it should be possible to pull the cable out. Hopefully.
Oh well, that's enough for tonight. Tomorrow should be interesting.
Greg.