Oil Pressure Switch - Thread Size

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
Alchad
Posts: 716
Joined: Tue Aug 14, 2007 8:18 pm
Location: Shropshire

Oil Pressure Switch - Thread Size

Post by Alchad » Mon Feb 18, 2019 5:05 pm

Hi,

Had a slight scare this morning when the oil pressure warning light came on (1390) , hopefully it was just the wire connecting to the switch which hadvirtually frayed through.

However thinking it might be the pressure switch, | started looking around for a replacement, and as Google often does, got diverted to an old thread on this forum

viewtopic.php?t=17081

What I picked up from this is that the expert view was that the engine block was tapped 1/8" BSP PARALLEL (and 28tpi). This tied in with the inspection of my pressure switch as by (aged) eye, the threads looked parallel and the switch screwed right down into the block.

However, from the above thread, and others I found by searching, it appears lots of people have difficulty with replacement switches which seem to only screw in a few turns, which suggest the replacement switches might be 1/8"BSP TAPERED (also 28tpi), or even 1/8" NPT which is 27tpi. Having looked online, although difficult to tell from some photos, I'd say that the threads on new switches DO appear to be tapered.

Just wondered if anyone agrees with this logic, and if I'm right my only option for a new pressure switch is to use a tapered one, or possibly find an adapter from 1/8"BSPP to whatever thread size the new switches are.


Regards

Alchad

User avatar
db2d
Posts: 2174
Joined: Fri Feb 24, 2012 10:01 pm
Location: Monmouthshire

Re: Oil Pressure Switch - Thread Size

Post by db2d » Mon Feb 18, 2019 5:45 pm

BSPP switches are available from davidbrownparts.com
When ordering state the type required.

Post Reply

Who is online

Users browsing this forum: No registered users and 10 guests