 | Home > Maintenance & Modifications > Steering box bracket to chassis bolt - spanner sizes? |
 
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| roliver Member Since: 24 Nov 2016 Location: Cambridge Posts: 60   
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Hi all,
I've just bought a Safari Equipment steering guard with 2" receiver and I'm trying to fit it to my Puma defender. I can't for the life of me work out what spanner size I need to remove the nut/bolt that fastens the steering box bracket to the chassis. I've read somewhere that it's 3/4 AF but I tried with a 19mm this morning which was too big so this can't be right. Does anyone have any ideas short of measuring the damn thing with calipers? Cheers, roliver |
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24th Jan 2017 1:06pm |
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| Mash Member Since: 09 Feb 2015 Location: Guernsey Posts: 1674  
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19mm is a close match to 3/4 but still slightly bigger. I would advise a decent socket set for these jobs as they grip the bolt head better and reduce the risk of rounding it. 90 wolf - Jasmin http://www.defender2.net/forum/topic39408.html
90 V8 - Maggie http://www.defender2.net/forum/topic42564.html 110 TD5 - Buggsy http://www.defender2.net/forum/topic59029.html 52HG25 lightweight https://www.defender2.net/forum/topic72342.html D3 Hse - Fiona Capri 2l S - Anna Think I might have a problem............ |
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24th Jan 2017 2:02pm |
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| roliver Member Since: 24 Nov 2016 Location: Cambridge Posts: 60
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Hi Mash,
Thanks for the advice. I did have a socket that fitted very well. Unfortunately, the nut is screwed so far onto the bolt that the it's impossible to clip tools to the socket. I may try to get an extended socket for this purpose. Also, I thought that 3/4 AF was slightly bigger than 19mm? http://www.csgnetwork.com/wrenchsizetable.html I must admit though, I'm absolutely terrible with imperial sizes. Cheers, roliver |
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24th Jan 2017 2:08pm |
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| Mash Member Since: 09 Feb 2015 Location: Guernsey Posts: 1674
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Yep your right Roliver, been a busy day in the office. Most bolts on defenders should now be metric. Easiest way to measure it would be using an AJ and a rule. 90 wolf - Jasmin http://www.defender2.net/forum/topic39408.html
90 V8 - Maggie http://www.defender2.net/forum/topic42564.html 110 TD5 - Buggsy http://www.defender2.net/forum/topic59029.html 52HG25 lightweight https://www.defender2.net/forum/topic72342.html D3 Hse - Fiona Capri 2l S - Anna Think I might have a problem............ |
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24th Jan 2017 4:30pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6601 
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If it's the upside-down fork shaped bracket which the Panhard rod attaches too as well, then the two bolts are M12 (two different lengths).
They are flanged head though, so the expected spanner size is reduced from the expected 19mm. They are probably 17mm Pre-Puma these were 1/2" UNF bolts with 3/4" spanner. The nut onto the arm which braces the steering box is 1/2" UNF.  1988 90 Td5 NAS soft top
2015 D90 XS SW |
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24th Jan 2017 6:03pm |
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| roliver Member Since: 24 Nov 2016 Location: Cambridge Posts: 60
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So bizarrely, after going out and using every similarly sized socket in the set, it seems the bolt head is 15mm (5/16W) was too big) and the nut is an exact fit for 3/8W (could this be 18mm given it's a Puma?).
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24th Jan 2017 6:44pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17312 
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Landrover often uses non-preferred sizes!
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24th Jan 2017 9:44pm |
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| R1200GS Member Since: 12 Jul 2015 Location: Hampshire Posts: 265 
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Just did this job on mine and used 15mm and 18mm ratchet spanners and sockets.
That's on a 2016 model |
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24th Jan 2017 11:13pm |
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| roliver Member Since: 24 Nov 2016 Location: Cambridge Posts: 60
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Hi R1200GS,
Thanks for confirming my suspicions! I've bought a metric socket set this morning + 15mm/18mm spanners so I'll let you know how it goes and whether or not 2009 Puma is 15mm/18mm too. Cheers, roliver |
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25th Jan 2017 10:17am |
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| roliver Member Since: 24 Nov 2016 Location: Cambridge Posts: 60
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Just for the record, 15mm and 18mm did it in the end.
Cheers, roliver |
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25th Jan 2017 7:15pm |
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| R1200GS Member Since: 12 Jul 2015 Location: Hampshire Posts: 265
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26th Jan 2017 12:02pm |
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