David Brown 990 hydraulic valve chest rebuild #45

today we rebuild the DB990 valve chest, put all the internals back in and explain some of the settings,
Music in this video
Intro
Snowy Peaks pt1
Artist Chris Haugen
Licensed to KZbin by KZbin Audio Library
Closing
Campfire Song
Artist Chris Haugen
Licensed to KZbin by KZbin Audio Library

[@shanebush9226]

This video is going to help me SO much later this fall/winter when I tackle cleaning out my valve chest.

[@manfromthemist1958]

so glad it's soing to help, team work makes the dream work many thanks Shane Barry

[@golhabaki]

Another great vídeo thank you once more for the content Barry

[@manfromthemist1958]

I so glad you're enjoying them, As I have a lot of fun making them, many thanks for your suport Barry

[@BundyBearsShed]

Brings back memories, from memory you could go 1 thou more movement on the spool but never go 1 thou less. Its been a while though.

[@manfromthemist1958]

Was a bit apprehensive about doing it, As its such an expensive part to break. many thanks Barry

[@eriku571]

I haven't had the opportunity to see the assembly of the valve chest. Now I know what to expect on my tractor. It's unfortunate how your 990 was left out in the elements for so long. How great that it is being taken care of now!

[@manfromthemist1958]

It's one of those things, that we never get to know, what happened before we bought it but it must have sat out in the rain for some time as it was in a bit of a state when we got it. many thanks Erik Barry

[@eriku571]

@@manfromthemist1958, My Grandfather was the second owner of the 885N that I'm working on. He taught me to drive it when I was around twelve years old. I have a picture of me riding with him when I was very young. After he passed it sat in the barn for over ten years with milky transmission oil and a flail mower attached to it. I have it running now. I want to get the hydraulics to work like they were designed to. That's been a challenge. Best of success to you!!

[@manfromthemist1958]

I know how you feel, my dad learnt me everything as a young boy and if it wern't for him I probably would have never become an engineer and I still feel he is with me when I'm doing jobs like this it was so good to be able to say "dad what would you do?" many thanks Barry

[@WWRT88w]

Barry,, my DB885/Case 380CK had a bent DCV like yours and had never been out of the tractor. I did buy that new valve chest from England. It was cast with a bigger hole and no threads for the DCV. I haven't had any descent issues despite no adjustment. My old chest should be good now that I know how to set the spool. Thanks for all the knowledge transfer!

[@manfromthemist1958]

Hi Der Widder, I'm so pleased it was of use and that now you can confidently repair your old valve. brilliant stuff. many thanks for your support Barry

[@daveturnbull2620]

Hi Barry, all videos are very educational- well explained and good viewing. I have looked at most of theses videos and am curious as to the real story of this tractor to you as you often refer that the tractor has been interfered with in a previous time

[@manfromthemist1958]

Hi Dave, many thanks for your kind words and support it is very much appreciated, the history of the tractor would be nice to know so in next weeks yarns I'll give a brief overview of that which I know, I'll also put a request to see if anyone out there has any information or can give me a nudge in the right direction to attemp and trace it's history. It has got a reg number, or at least a reg plate where it's the right one or not cos there's no V05 with it. many thanks Barry

[@kensimpson7441]

Well done Barry, can't wait to see the adjustment and fitting vid. How come you get to use the bread board as well as the pressure cooker?

[@manfromthemist1958]

Debs in bed with flu, while the cats away! many thanks Barry

[@mrskyrydr]

A little tip when cleaning any type of hydraulic spool valves NEVER let the sharp edges get rounded or it will surely become scored and jammed from not being able to self clean the bore when moving normally.

[@manfromthemist1958]

thanks mrskyrydr

[@sashe1227]

Ready for rebuild here ,what’s the best way to get the insides polished up ?

[@manfromthemist1958]

Hi Sashe, that depends on how bod or good the internals are to start with, if they need alight polish I would get a wooden dowel that fits through the inserts, wrap some newspaper around the dowel to a good fit and then put metal polish on the paper. What ever you do do not use abrasive paper. The tolerences inside the valvechest is extrememly tight and the inserts need the corners left intact or they will begin to pass. If they are rusted and pitted then I would seek professional help to get the valvechest and re;ated spools/inserts cleaned and polished. I ended up sending mine to Barclay Williams for a complete professional rebuild, sometime you need to admit the limit's of your own ability. hope this helps Barry

[@ethandarnell3805]

Hey Barry, I took my valve chest out and cleaned it. Reassembled it and when the tractor starts my lift arms raise all the way up. Any ideas what I’ve done wrong. I started it to only make my adjustments on my quadrant lever. Thanks for any advice

[@manfromthemist1958]

Hi Ethan, have a look at "path of discovery" shane's channel he has just released a video re adjustment settings for the hydraulics, if that doesn't help have you tried the David Brown Tractor forum there are a lot of very good hydraulic people on that who could answer your question better than I could. hope this helps Barry

[@jonperry4657]

Another brilliant video I could tell you was throughly enjoying yourself did you strip down the dump valve? If so I must have a look at that video proper job 👍

[@manfromthemist1958]

Hi Jon, I did, full strip down, but I did it before the vid's started back in 2021 i'll have a look back at my photo's to see if I can find any of it. It's not difficult, you split it at the nut and theres a small pin inside to knock out and it's basically just o rings inside many thanks Barry

[@manfromthemist1958]

Hi Jon just found some images and a totally uselass vid, but I'll put them into the community area and I'll pop the vid into the weekly yarns on sunday hope this helps Barry

[@jonperry4657]

Lovely jubbly mine occasionally tends to chuck out oil so I'm guessing o ring perished nice winter job

[@shanebush9226]

@@jonperry4657 Same for mine jon. It seems in the last couple of years nearly every o-ring on my tractor has started needing replacing.

[@jonperry4657]

@ shane Bush yes it's irritating these Leaks but just got the dump valve seals to do but it's rewarding once done I must admit everything I've done so far in the past 3+ years have stayed dry 👌

[@luisvazlopes5801]

Tenho um trator case 1 194(David bron) que supostamente tem um problema de hidráulica: quando está em cima está sempre a ajustar altura,o que será? Agradecia ajuda/informação obrigado

[@manfromthemist1958]

Hola Luis, si me envías un correo electrónico a [e-mail] te devolveré un manual hydarualic que te guiará a través del diagnóstico de tus problemas, pero creo que tienes una válvula atascada, es decir, suciedad en tu sistema y en tu articulación. está fuera de ajustes. pero espero que el manual te ayude muchas gracias barry

[@jaykamal1978]

Sir really appreciate your video, can anyone plz tell me where can I buy the valve rebuild kit, springs etc.

[@manfromthemist1958]

Hi Jay kits are available from David Brown Tractor part ltd, I think off the yop of my head about 6 or 7 pounds UK many thanks Barry

[@jaykamal1978]

@@manfromthemist1958 Thanks again sir, iam in Fiji Islands, trying to restore my late dad's tractor. Parts r hard to come by in the Islands but a lot of them can be shipped to USA, from there I have a buddy who can forward it to me. Australia and NZ ships a few things directly.

[@manfromthemist1958]

@@jaykamal1978 Hi Jay, I understand your predicament with obtaining parts, good luck with restoring your dad's tractor, lets know how you get on. Many thanks Barry

[@toddlamkin8359]

I have redone the left pump on a 885 it will come up but want go down please help

[@manfromthemist1958]

Hi Todd, Happy New Year, sorry I'm no expert on Db hydraulics but it sounds like your latching valve is stuck, if you have a look on FB at David Brown Tractors group today the very first topic is exactly that, placed by Alberto Esclavõ it gives good answers to the problem, lets know if you find it, can't put a live link to it here as YT won't let live links to external sites Thanks for the comments Barry