4/47 into a 900

The place to discuss all matters relating to David Brown Tractors. You will need to register your user name before you can post. If you have already registered could you please make sure that your location details have been completed. Go to My Account in the Main Menu on the left, and then go into "Edit Your Information" and complete your location details. Give the Country (and State/Province if you wish) if outside the U.K. County if within the U.K. Location details helps other members if you need spares, technical advice, or the nearest practical help.

DISCLAIMER -

David Brown Tractor Club Ltd
Forum/website Disclaimer

1. This [forum/website/chat room] and the advice and opinions expressed herein is not a solution for mechanical, electrical, valuations, other problems, breakdowns or issues experienced in relation to the vehicles referenced.

2. If reliance is thought to be placed on any of the information guidance or input provided such information will be expressly confirmed as appropriate to be relied upon.

3. In the absence of any such confirmation no reliance should be suggested or inferred.

4. Members must not disclose information to 3rd parties in anticipation that reliance will be given by non-members.

5. Non-members must not purport to give advice on behalf of David Brown Tractor Club.

6. If you or someone you know is experiencing difficulties or repeated breakdowns you must seek assistance for an appropriately qualified expert who holds themselves out as such.

7. Any comments are free of charge and made or posted on an ex gratia basis. No member or non-member may advertise their professional services

Any user inactive for more than 3 months will automatically be deactivated, please contact admin@dbtc.co.uk if you would like to be reactivated.

Please be aware that your user name and entered location can be seen by all members. We only store information you have entered which is your email address and username, your IP is also stored, we have no access to private passwords.

If you do not agree with your information being stored, please do not register an account, If you wish to unsubscribe at any time please email admin@dbtc.co.uk giving your username.

Amended 27/10/18

Moderators: Segrie61, admin

Post Reply
User avatar
richbug
Posts: 1356
Joined: Mon Mar 22, 2010 5:32 pm
Location: Pennsylvania, United States of America

4/47 into a 900

Post by richbug » Thu Sep 13, 2018 5:28 pm

Anyone done it? Will it bolt in? I have a 900 that is just plain worn out. Parts are like looking for hens teeth in the US for the 4/40. 4/47 parts are generally available, and I have a donor engine I can rebuild.
Users: 780, 1210 Bottle Opener, 1494 4wd open station with 74L, 990, 1394, 1194 High Clearance, another 1394, 1194 LCG, 1290 with 56L

1200, 900 projects

Parts: 3800, 1200, 1394, 1412, 1490, 770, 885

User avatar
db2d
Posts: 1904
Joined: Fri Feb 24, 2012 10:01 pm
Location: Monmouthshire

Re: 4/47 into a 900

Post by db2d » Thu Sep 13, 2018 7:28 pm

It is not possible to fit a 990 engine into a 900 main frame, they are not interchangeable.

User avatar
richbug
Posts: 1356
Joined: Mon Mar 22, 2010 5:32 pm
Location: Pennsylvania, United States of America

Re: 4/47 into a 900

Post by richbug » Thu Sep 13, 2018 8:01 pm

Have you tried it, or just postulating? 4BTs and 354 Perkins engines live in other DBs. The tape measure says it is awfully close.
Users: 780, 1210 Bottle Opener, 1494 4wd open station with 74L, 990, 1394, 1194 High Clearance, another 1394, 1194 LCG, 1290 with 56L

1200, 900 projects

Parts: 3800, 1200, 1394, 1412, 1490, 770, 885

User avatar
db2d
Posts: 1904
Joined: Fri Feb 24, 2012 10:01 pm
Location: Monmouthshire

Re: 4/47 into a 900

Post by db2d » Thu Sep 13, 2018 8:42 pm

I am not postulating, the 990 engine block is a different shape and size and will not sit in a 900 main frame. The main frames are not interchangeable for the same reason. When other makers engines have been fitted, major modifications have to be made to the tractor. Very few conversions are a success, most are a botch job with very obvious weaknesses.

TEZB
Posts: 270
Joined: Thu Jul 06, 2006 7:37 pm

Re: 4/47 into a 900

Post by TEZB » Thu Sep 13, 2018 9:22 pm

If you have the engine give it a try, nothing ventured nothing gained as they say

User avatar
GeoffDEAL
Posts: 317
Joined: Tue Jan 27, 2009 8:25 am
Location: New Zealand

Re: 4/47 into a 900

Post by GeoffDEAL » Mon Sep 17, 2018 8:35 pm

A friend fitted a 950 motor into a 30t there was a slight clearance problem with back motor seal cover or back bearing cap to frame block but worked alright and bolted up with a little work but the 990 engine is probably different again, measure it up or sit it on the frame if you want to be sure.

User avatar
mc
Posts: 104
Joined: Mon Jan 17, 2011 8:35 pm
Location: Yorkshire

Re: 4/47 into a 900

Post by mc » Tue Sep 18, 2018 10:28 pm

As db2d correctly states, a 990 engine will not fit into a 900 main frame. In general the cylinder block to main frame fitting was the same from VAK1 to 950. This was then changed on the 990 AD4/47 & remained similar up to the end of production in 1988.

Post Reply

Who is online

Users browsing this forum: Google [Bot] and 4 guests