Long post!
Hi a great looking Spanish 80 you have. I I live in Spain and own a 94 1HDT run a garage as well.
Looking at your list:
Brakes pulling to one side, almost certainly stuck pistons, pull the pad on one side of the disc and have someone push the brake pedal GENTLY. This will allow you to bring the pistons out a fair way to inspect the rubbers. If they look good then 'exercise' them a few times, and fit new pads. If the rubbers are perforated then change the caliper/s. Whatever your decision change the brake fluid anyway. Discs are pretty hardy and unless you intend to work the 80 hard then the stock brakes are fine when working properly. You will see that the ABS system and load sensing valve are often mistakenly removed, I often wonder if this is done mainly because repairs to the ABS can be very expensive, or the need to join the 'lemmings gang' citing the brakes are poor with it working as an excuse to get around the cost, and removing the LSV above the rear axle is quite frankly BS as there is no point whatsoever, it has an important job to do.
Off roading in here in Spain, I often find I am thousands of metres above ground level, my 80 loaded to circa three tons and the brakes are fine, so I maintain the posture that a properly maintained system is fine, given the vehicle can be loaded with a trailer bringing total train weight nearer seven tons, if your 80 does not stop with three tons let alone seven then there is something very wrong! In my opinion if there is an issue it is the front discs, in my opinion they are a little on the small side, so can be a little smelly after descending from a climb not being able to shed heat build up, despite using the manual gearbox on my vehicle to help the brakes (ex HGV driver) the heat can cause glazing of the pads, the result is the driver presses harder and thus compounds the issue. Choosing discs that are grooved and dimpled (not cross drilled) as I did will help but not by much. The handbrake is also a little on the weak side in my opinion, and I have seen more than one set of handbrake shoes installed incorrectly, they also do need to be manually adjusted to allow for cable stretch and so forth, either way I would not trust it when loaded up. Seeing your impressive vehicle line up, I may or may not be be teaching you to suck eggs, but you will find my experience as a mechanic for more years than I can remember with my own business, along with owning one of these fine machines for twelve years more than makes up for those citing 'my best friends mates uncle told me to do this and that' you will often hear on many forums, MUD is no different.
Windows tend to be slow, and may even stop in cold weather, at the age these vehicles are the problem is normally the rubbers in the window runners, they go hard preventing the window moving easily, the regulators will eventually fail. If the regulator looks good a simple grease up and new rubbers will sort the problem, continued use without the above repairs will eventually burn out the contacts in the switch gear.
Given the way the heat here affects rubber and plastic, it is no surprise you need to replace the components you mentioned. Be very wary of the plastic strip on the outs that is at the bottom of the window, it can lift from the chrome trim and exposes a razor sharp edge, the simple task of washing or polishing your 80 could see your fingers or hand opened up like a sardine can!
Timing belt and tensioner is an obvious job, very easy on both the earlier engine (such as mine) and the later. The Spanish have trouble in particular in the warmer South with using antifreeze, of course antifreeze also has corrosion inhibitors, the lack of use along with water that has a calcium content hard to get your head around, you find the lower areas of the radiator (including heater rad) can easily become caked up, the rear heater lines also rust through (not restricted to Spain) given the work involved in replacing them most simply bypass and remove the heater below the seat, a good place to put 'stuff', whilst under the seats look to see if the seat heater wires are unplugged, the switches in a position to activate by accident.
I know there is more but will leave it there, that is a great looking 80, enjoy.
Regards
Dave
