Search found 100 matches

by mc
Wed Jun 03, 2015 11:27 pm
Forum: DBTC Forum
Topic: engine options
Replies: 13
Views: 5736

RE: engine options

In answer to the question from rough990. I know it may seem strange but it is true. The AD4/47 engine (990 Implematic) & AD4/55 engine (995/6 & many others) are both long stroke engines ie 4-1/2 inches. The AD4/49 engine (later 990 selectamatic) is a short stroke ie. 4 inches. So, yes you re-use the...
by mc
Wed Jun 03, 2015 11:09 pm
Forum: DBTC Forum
Topic: engine options
Replies: 13
Views: 5736

RE: engine options

No, unfortunately the internal diameter of the dry liner K964857 is bigger than the outside diameter of your 990 AD4/47 pistons. I am not aware of anyone who produces a liner of sufficient thickness to do as you suggest. I think your only options are to go for oversize 100 mm pistons as discussed, o...
by mc
Tue Jun 02, 2015 10:52 pm
Forum: DBTC Forum
Topic: engine options
Replies: 13
Views: 5736

RE: engine options

The normal method to repair the sleeveless block is to bore out all cylinders & fit oversize pistons. As an alternative you could bore the affected cylinder, have a dry liner (part number K964857) fitted & bored back to standard size.
by mc
Mon Jun 01, 2015 10:34 pm
Forum: DBTC Forum
Topic: engine options
Replies: 13
Views: 5736

RE: engine options

I think possibly you misunderstand. From your old 990 Implematic AD4/47 sleeved engine you reuse the crankshaft, connecting rods, oil pump, water pump, cylinder head, camshaft, timing gears/cover/backplate, injection pump etc. These are fitted to your replacement AD4/49 sleeveless cylinder block, bu...
by mc
Mon Jun 01, 2015 8:24 pm
Forum: DBTC Forum
Topic: engine options
Replies: 13
Views: 5736

RE: engine options

It is possible to replace the 990 AD4/47 sleeved block with the later 990 AD4/49 sleeveless block, but not in the way you suggest. In July 1974 supplies of the 990 AD4/47 sleeved block became no longer available from the factory, so David Brown released a technical bulletin (No. TB143 Engine) which ...
by mc
Wed May 06, 2015 11:02 pm
Forum: DBTC Forum
Topic: 995 - 1979 hydraulic & transmission filter
Replies: 11
Views: 5781

The correct filter is still available from any CaseIH dealer quoting part number K920522
by mc
Mon Mar 09, 2015 10:46 pm
Forum: David Brown Video Album
Topic: TV commercial
Replies: 9
Views: 4497

Assuming colours are original it must be a 1394, because 1194 & 1294 not made in Case IH red & black colours & 1494, 1594, 1694 all had mesh grille above waist rail.
by mc
Sat Dec 06, 2014 11:40 pm
Forum: DBTC Forum
Topic: Time to restore DB 900
Replies: 5
Views: 5155

RE: Time to restore DB 900

The 900 does not have copper injector washers as Powerrabbit suggests. The copper sleeves have been no longer available from Case IH for many years & you may have difficulty finding a replacement.
by mc
Sun Nov 16, 2014 11:06 pm
Forum: DBTC Forum
Topic: Part number. Help please
Replies: 21
Views: 6590

RE: Part number. Help please

I have noticed some DB castings from before the introduction of the "K" which have a "C" or other letter prefix. I don't think this has any significance from the point of view of ordering replacement parts, but it must have meant something to someone at the time. I think that after Meltham productio...
by mc
Sun Nov 16, 2014 10:33 pm
Forum: DBTC Forum
Topic: Part number. Help please
Replies: 21
Views: 6590

RE: Part number. Help please

David Brown Tractors Ltd was taken over by Tenneco Inc in 1972 & was affiliated to the J I Case Company of Racine, USA. As a result of this the Meltham built DB models became available in the USA through Case dealerships & Racine built Case models starting with the 101 HP Case 970 Agri-King became available in the UK through David Brown dealers.

This created problems for the parts supply side of the business as some part number from both companies were the same. Traditionally DB part number were 5 or 6 figure plain (no prefix or suffix letters) numbers which if I remember correctly started at 10001. Case used plain numbers sequences & a variety of prefix & suffix letters. Looking through an old Case parts list I have, they used part numbers with A, B, C, T, F & V prefix letters & probably many others, but they did not use the letter K.
In order to differentiate between the part numbers of the two product lines a K prefix was added to all DB part numbers.

David Brown traditionally also used part numbers with a U prefix for loose sales “Unitsâ€￾ or accessories. For example a Hydraulic Lever Catch Unit for a Selectamatic model was part number U730, this also gained the prefix K to become UK730.

I have seen on this forum the question asked as to the meaning of the letter U within a circle when cast into a cylinder block, steering box or similar component. The answer given was the component was used as part of a Unit. This is incorrect. A letter U cast in a circle simply means that the component has a hole or holes which are threaded with a Unified thread, generally UNC (Unified National Coarse)
by mc
Sun Aug 31, 2014 11:24 pm
Forum: DBTC Forum
Topic: 995 PTO shaft
Replies: 8
Views: 3223

RE: 995 PTO shaft

As db2d correctly states there was a change from straight cut to helical teeth on the hydraulic pump drive train during this period.
by mc
Tue Jul 22, 2014 10:24 pm
Forum: DBTC Forum
Topic: Mild steel rings
Replies: 2
Views: 1384

RE: Mild steel rings

The sealing rings are obtainable in standard size only from any Case IH dealership under part number K914346
by mc
Wed Jul 02, 2014 8:13 pm
Forum: DBTC Forum
Topic: Super Cropmaster Oil Seal Removal
Replies: 5
Views: 2511

RE: Super Cropmaster Oil Seal Removal

1/4 inch British Standard Fine (1/4 x 26 Threads Per Inch)
by mc
Sun Jun 29, 2014 10:25 pm
Forum: DBTC Forum
Topic: 1210 acquisition
Replies: 40
Views: 20998

RE: 1210 acquisition

Is k943845 not the part number for the first & reverse selector rod? I believe the part number of the selector jaw you require is K915496
by mc
Wed Jun 25, 2014 11:18 pm
Forum: DBTC Forum
Topic: DB770 Gold Louvre Plate
Replies: 12
Views: 4345

RE: DB770 Gold Louvre Plate

The very early White/Brown 770 tractors to which I refer in my original question are the tractors from Ser No. 582001 (first white/brown model manufactured Oct 1965), to Ser No. 583183 (manufactured Feb/March 1966 – assuming tractors were produced at a consistant rate throughout the year). These t...