Unimog Club UK

not sure to be honest its a u900 tractor air brakes diesel 6 pots and has a bit of rust.  a. round the windscreen which is a frame and can be removed . b.  bonnet has some rust along front edge.  the clutch  loses pressure as its used so a leak of some sort ether slave or master hopefully fixed with a seal kit  there,s a air leak on the brakes which is a broken air connector   but as it hasn,t   arrived yet so not sure just what i have gained over the phone with the seller  do need some sort of help with diagrams of wiring as thats also shot with faults and how to strip the portal axles  down i think they may need a service of some sort don,t want them braking due to no oil and the engine oil cooler leaks which is putting water into the oil  floor pans are a tad thin  i can do all the jobs welding  electrics  striping it down just need a few pointers to put me in the right direction