Cat 951 89A prefix why is it hard to find information for

That's a low production (UK) machine, only 1,896 units built.
There are a bunch of low production Japan built units that overlap start of production plus the early 63K (UK), 69H(FR), and the 86J (US). I'd look to those three later and higher production models for service manuals.

I would tend to think the 951 89A was built in Glasgow? there was never a Workshop Manual printed for this machine only Parts and Ops Books, it's fitted with the 4"1/2 Bore 330B engine, there is a workshop Manual for this engine, as for the rest the early D4D Manual is good enough, the Hydraulic System did have a Test & Adjust print out but things are well listed in the Parts Book. tctractors p.s. The 69H France built 951 was in fact the 951B Power-Shift Shovel built when Track Shovel production ended in the U.K.

The 951 89A and D4D 88A were identical from the engine through to the final drives, both built in Glasgow, the 951 replaced, as TC said, by the 951A 63K series with the 4.75" bore D330C engine. 941 and 951B production both started in France with the 4.5" bore engine right at the end of 89A production, there were not many built, the 69H series 951B had the 4.75" bore engine and became the 951C later when the engine was renumbered the 3304. Any early D4D manual was enough information to repair an 89A while TC is correct that there was special instruction on the hyd system but it was very close in design to the 955F and 955H.
At one time, there were five different machine models built in Glasgow, seven if you include power shift and direct drive versions of the D6C and D8H/K.

Yeah you guys are right it was Glasgow sorry, this information should help a lot thanks.I figured she must have been a bit rare by how fast she was replaced by the B. Poor girl is in need of tlc but running her into the ground right now to get dam work finished before drought breaks

The 89A and the 63K's although they had different engines were similar but not the same in many ways, so don't think that parts will simply swap between the 2 machines, the Brake Drums on the 89A had 10 bolt mounting, on the 63K this was changed to 14 bolt mounting, things could be made to fit from 1 to the other but it can involve a good bit of work, the changes were many and would take a long time to list, but the basic format was just the same as Catsilver posted. Tctractors

That's why we always used to ask for the serial number before quoting any parts TC, there were even changes to the final drives about half way through the 89A range, I got caught out once with hub bearings which were far too small. By the way, what do you reckon of the current discussion on springs on FB?

I have a book that I have listed in some place all the important changes on F/Drives and how to change some bearings etc that cannot be found anymore, including all the Tooth count of the gears, even D8H bearings are getting tricky to find needing a hub change to sort things, on the Spring discussion I could rattle off loads of story's, 1 involved ripping the complete side out of a Parcel Delivery Van as he was on route to me with a recon' Recoil, but I don't want to cause any drama as I just kept my head down bellow the Storm as the Van was Scrap. tctractors