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Interchangeability of parts

Posted: Sat Mar 17, 2018 1:45 am
by dartmoor880
Having read through the very useful posts on "alternative replacement service parts" i was wondering if anyone had ever compiled a list of parts which might be interchangeable between models in the same range?
Having just got myself an 880 Selectamatic which will require some work and no doubt a few replacement parts, i am particularly interested in whether i could use parts (either new or used) from other models in the range, as an example, i have seen from various parts suppliers websites that the same hydraulic pump is being advertised as fitting many of the Selectamatic models (780, 880, 885, 990, 995, etc),could i then assume that other hydraulic internals may also be common to several models?
I have also seen breakers selling complete engines for an 885 which they say will fit straight into an 880 or 780.

I have a gearbox problem on my 880 and i know of at least three tractors (885, 780) not far away that are scrapped or being broken for spares, would the complete gearbox units from any of these be a straight swap into an 880? or could any parts be used? I understand that some of the gearing may be slightly different, but surely that would not be a major problem?
Apologies if this is a stupid question, but as these scrappers are quite close to home, i thought i may as well ask.
Thanks Roger.

Re: Interchangeability of parts

Posted: Sat Mar 17, 2018 9:00 am
by db2d
A six speed 780 gearbox will interchange with a six speed 880 unit but 12 speed units are not interchangeable with six speed versions. The 885 has a synchromesh gearbox that is not interchangeable with your 880.
Some of the hydraulic parts and complete units are interchangeable but valves etc are not interchangeable between units.
Be aware that some breakers market parts separately that are matched pairs e.g., crown wheel without the pinion shaft.

Re: Interchangeability of parts

Posted: Sun Mar 18, 2018 4:44 pm
by ALANJ
A good point.Selectamaticwise,from 885 to 996, the gearbox unit and main hydraulic pump are common
1210 and 1212 share common engines,clutches ,hydraulic pump and final drives.The SDC valve chest is common to all the above ,irrespective of the S2,S3 or S4 stamped on the underside.Hope this helps.AJK.

Re: Interchangeability of parts

Posted: Mon Mar 19, 2018 8:25 am
by dartmoor880
db2d and AlanJ, thanks, all useful info for when i have to start searching for bits that i might need.
I hope others in the know continue to add to this, it may also be helpful for other.

Re: Interchangeability of parts

Posted: Wed Mar 21, 2018 9:04 pm
by GeoffDEAL
Hi a 1200 cylinder head fits and is the same as a 1494 valves everything the same , did it when the 1494 put a valve head through the original. Great idea doing an interchangeability of parts thread DB didnt change things a lot if they did the job.

Re: Interchangeability of parts

Posted: Sat Mar 31, 2018 10:19 pm
by GeoffDEAL
There are many things that interchange front wheels from red 990 to 94 series and starters the same only 6 cylinders are different starters, someone said even the Cropmaster 30c diff crown wheel and pinion is same as 1200 but i am not sure of that, must be heaps of other things let everyone know.

Re: Interchangeability of parts

Posted: Sun Apr 08, 2018 3:09 am
by GeoffDEAL
1410 and 1690 share the same manual gearbox and final drives must be heaps of other stuff on all DBs

Re: Interchangeability of parts

Posted: Thu May 17, 2018 9:56 pm
by GeoffDEAL
Hi moving this thread up anyone found stuff that interchanges cheers

Re: Interchangeability of parts

Posted: Fri Jun 01, 2018 12:02 pm
by GeoffDEAL
Cab back window handle on 90 series is same on 94 and on to 5130 probably other 51 series.

Re: Interchangeability of parts

Posted: Tue Jul 17, 2018 10:04 pm
by GeoffDEAL
Hi again i am looking at starters fitting DBs the red 990 fits up to the 1200 1210 inc white 990 995-6 ect have seen 3 different starters on 900s so should follow that they can fit 25 and 30d anyones experiences on this thanks.

Re: Interchangeability of parts

Posted: Tue Feb 26, 2019 9:56 am
by GeoffDEAL
Moving thread up again.

Re: Interchangeability of parts

Posted: Wed Feb 27, 2019 4:29 am
by cobbadog
Found this out today.

On our 30C I have been looking at the wheel bearings and found that one of them had collapsed and there is 2 tapered rollers missing completely and fine bits crumpled up in the hard packed grease. This complete axle assembly is from a Super Cropmaster originally and I swapped it over with my original as it had worse issues.
When I went into the bearing service centre the owner looked at it in wonder and then double checked the part numbers, yes these have 2 part numbers one for the bearing and one for the cone. He identified it as being from a David Brown tractor but could not name the model so I told him. I asked how did he know that? His reply is because of the number on the bearing ended in "x" and that was mainly used by D.B. and it was a system of being able to mix different size bearings with different size cones for various applications. Then he said he didn't have one in stock but was available at a price that would have been fairly scarey. The cone alone was to be AU$50.00 alone. Then he thought outside the box on the problem. He then measured the OD and ID and the width of the original bearing and came up with a cross reference number of 30207M-90KM1 Timken bearing. It is a perfect fit and has a higher load rating than the original bearing as it has larger rollers than the original.
Hope this comes in handy for any one else doing their wheel bearings on the similar model.

Re: Interchangeability of parts

Posted: Fri Mar 01, 2019 4:02 pm
by Gard
On a similar issue with 900 which may be same axle as your 30, The correct Timken tapered wheel bearing, 19283X with 19138X cost more than the entire tractor. Some measuring found National 30207 for $ 18 from Rock Auto, they fit OK, are slightly wider than the Timken and have a 14 degree cone instead of 16 degree. I suspect the tractor will see a lot less use in the next 60 years than its first 60 years. The axle shafts were a little worn so bearings were installed with locktite. Timken seal 472015 fits good for $ 7.

Re: Interchangeability of parts

Posted: Sat Mar 02, 2019 3:49 am
by cobbadog
Same bearing as mine and they fit and work perfectly well. I removed all the old hard grease from inside the hub and packed it with fresh. As there is a grease nipple I did not bother replacing the seal at the back so when I pump new grease in it can freely escape at that point. As this is now a Tractor just for Trekking it only puts about 200 klms per year on itself.