True hours

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
jazo
Posts: 773
Joined: Fri Jun 15, 2007 7:13 am
Location: New Zealand

True hours

Post by jazo » Wed Sep 07, 2016 7:04 am

Hi, few years ago when I purchased my 1394 it had 6368 hrs on the clock, I fitted a electronic hour meter under the dash to compare clocks,I have never left the key on and the genuine clock works fine. I now have 6698 hrs on the main clock and the electronic clock reads 538 hrs. So that's 330 hrs compared to 538 true hrs. With this that suggests my tractor has done around 10900 hrs if the main clock has always worked and has not had a broken cable. Does anyone know what the 90/94 series clocks are calibrated to? The work my tractor does has a good mix of flat out on the road and alot of 540 pto work
1394 4wd
1294 4wd
30D
990x2
880
780x2
900

User avatar
march12
Posts: 11
Joined: Tue Apr 12, 2011 5:53 pm
Location: Latvia

RE: True hours

Post by march12 » Wed Sep 07, 2016 8:19 am

Hi, if i am correct, true working hours ar mechanical(engine hours) multiplide 1.8 if avarage workink engine rpm are 1600revs per min.

User avatar
case-ih1594
Posts: 1065
Joined: Sun May 12, 2013 10:38 am
Location: Preston

RE: True hours

Post by case-ih1594 » Wed Sep 07, 2016 5:04 pm

Hi, I don't think the engine 'hours' are the same as 'time' hours.

As march12 has said they are based on one 'engine hour' being at a set rpm (1600 was suggested). The hour clocks on older tractors stated this on the face - something like "hours based on 1600rpm". In other words an hour would pass twice as quickly at 3200rpm, or twice as slowly at 800rpm.

broadsword
Posts: 1707
Joined: Thu Jun 12, 2008 9:17 pm
Location: Holmfirth, Huddersfield

Post by broadsword » Wed Sep 07, 2016 6:12 pm

Took some finding - knew I`d asked this before.

http://www.dbtc.co.uk/index.php?name=PN ... t=1412+rpm

Andy

JamesF
Posts: 1327
Joined: Tue Mar 14, 2006 8:49 pm
Location: South Yorkshire

Post by JamesF » Wed Sep 07, 2016 8:17 pm

It reads hours above 1412 rpm

jazo
Posts: 773
Joined: Fri Jun 15, 2007 7:13 am
Location: New Zealand

Post by jazo » Wed Sep 07, 2016 11:20 pm

I see some tractors of the same age with electronic clocks always seem to have done more hours
1394 4wd
1294 4wd
30D
990x2
880
780x2
900

Post Reply

Who is online

Users browsing this forum: No registered users and 15 guests