That "Baker" blade on the old HD14 Allis only had one way hydraulics, they lifted but had no down force, that's why they were so heavy. The pony crank on the older RD8 up to 2U and D7-7M up, could have the crank in any of 3 positions-vertical thru the bonnet-out the side over the track or out the front when there was no front attachments. There was never any HI-OUTPUT D8's in NZ as far as I can remember. The little red" TD6 Overloader" was built by "Hamilton Engineering" in Christchurch. He who invented the "Hamilton Jet for boats. N.Z. railways had a lot of them used in ballast pits and trackside clearing. Seton Contracting from Tirau had his first two TS24 scrapers on the Mere Mere to Kopuku causeway in 1957,McRobbie Bros from Pokeno and M.O.W. did from Mere Mere out to Island Block,Seton did Island Block East and west, and Stevenson did Kopuku to Island Block. Waikato Earthmovers was "Baldy" Margen, formerly Dryden and Margen. That looks like a very early TD25, turbo Cummins, and an older TD24 in the 3rd pic. Just going by the shape of the fuel tanks and the planetary steering sticks by the operators boot and also the planetary hubs.