 | Home > Maintenance & Modifications > fitting ARB Air lockers for Puma |
 
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| AndrewS Member Since: 10 Apr 2007 Location: Hereford Posts: 3708   
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Remember to pull the fuse on the TC when using Lockers
 130's have feeling's as well you know  |
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11th Oct 2010 12:04pm |
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| MK Member Since: 28 Aug 2008 Location: Santiago Posts: 2425  
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It is a one day job and certainly not DIY unless you have all tools and want to take the chance. It should be around 100 quid cost. Puma 110" SW
............................................................. Earth first. Other planets later |
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11th Oct 2010 12:38pm |
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| SteveS Member Since: 05 Oct 2010 Location: Devon & Berkshire Posts: 388  
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Just had ARB locker fitted to rear and about to get the front done next month. The rear locker fitting also included installation of the bigger capacity ARB compressor, fabrication of a strenghening bracket to mount said, fitting all the switches (on/off, rear and front) and the pipes and electrical cables. devon 4x4 who did the work (very professional neat job) quoted 6hrs to fit the locker and 4hrs to do the compressor, cables, pipes and switches
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11th Oct 2010 10:12pm |
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| leeds Member Since: 28 Dec 2009 Location: West Yorkshire Posts: 8582
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Just being curious here, Steve, what are your reasons for fitting a front axle locker?
When we had the ARB locker fitter to rear axle on our red 110, we were warned not to have one on front axle due to risk of breaking front CV joint if steered with front axle locker in etc. So are you comping the vehicle? Or have ARB managed to overcome these problems/ change the type of axle locker? Brendan |
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12th Oct 2010 8:00am |
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| Naks Member Since: 27 Jan 2009 Location: Stellenbosch, ZA Posts: 2645  
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In your shoes, I would put in the ARB rear locker and that's it.
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12th Oct 2010 8:38am |
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| double cab happy Member Since: 01 Jun 2009 Location: merseyside Posts: 573 
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with just a rear locker do you also use diff lock (i guess you must, but thats a guess) and is it true what people say "a defender withrear locker is dam near unstopable"
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12th Oct 2010 9:03am |
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| Naks Member Since: 27 Jan 2009 Location: Stellenbosch, ZA Posts: 2645
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Indeed, engaging the Rear DL without the CDL will be useless. So when you get to an obstacle, you engage CDL as usual. If that is not enough, you engage Rear DL. And with the added TC for the front wheels that Puma will be damn near unstoppable. Also a good idea to engage the Rear DL when going down steep hill with ruts. |
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12th Oct 2010 9:09am |
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| MK Member Since: 28 Aug 2008 Location: Santiago Posts: 2425
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In my case I connect the Rdiff before (and central diff) things go ugly. I believe in this way you avoid to stress the half shafts. Puma 110" SW
............................................................. Earth first. Other planets later |
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12th Oct 2010 9:17am |
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| double cab happy Member Since: 01 Jun 2009 Location: merseyside Posts: 573
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thanks for the answers guys, i guess i now know whats going on my christmas list, lets just hope that santa's little elves can knock up an air locker, or a detroit true track.
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12th Oct 2010 11:21am |
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| AndrewS Member Since: 10 Apr 2007 Location: Hereford Posts: 3708
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For about 3 seconds. Don't use TC with Lockers, in the case described above you will blow the front diff. Sent Via J-Lo 130's have feeling's as well you know |
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12th Oct 2010 11:39am |
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| Naks Member Since: 27 Jan 2009 Location: Stellenbosch, ZA Posts: 2645
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? I fail to see how - if you have CDL & RDL, then the only wheels that will engage TC is one of the front wheels - and that will not happen often. |
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12th Oct 2010 12:48pm |
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| AndrewS Member Since: 10 Apr 2007 Location: Hereford Posts: 3708
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When the wheels spin the brakes will be applied by the TC and you will end up breaking something on the front axle. By locking the rear you have reduced the escape route for the power .
TC works as you know by braking the spinning wheel. Without lockers there will always be one of the four tyres that has least grip causing the wheel to spin when the power is applied, this causes the TC to brake that wheel, a split second later another tyre looses grip so on and so on. So basically when you drive in difficult terrain the TC is applying the brakes, this puts a lot of stress on the drive train, by locking the rear diff the rear TC wont actuate as the TC wont detect wheel spin. So the front will suffer unless you are an excellent driver that never induces wheel spin
Sent via J-Lo 130's have feeling's as well you know |
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12th Oct 2010 1:25pm |
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| Sonic3d Member Since: 28 Jan 2008 Location: Ross on Wye Posts: 1505 
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Trust me what AndrewS said is true
I proved that in the bottom of Morocco and the weak link was the diff  |
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12th Oct 2010 10:19pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8065  
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with a RL in and CDL TC will only need to work on the front axle and it will lock the spinning wheel. the same as it does without a RL. (it would just also be doing the same on the rear too)
TC on pre 11MY only works across axles anyway (11MY> it does all 4 (as per that other long thread about lockers)) so RL or not it is providing the same function. The difference is as Andrew eludes to that there is no where for the power to go if the conditions are that bad as if RL and CDl are in AND TC has braked one front wheel to stationary then the power can only go to the other front wheel if that has traction equal to the rear axles then vehicle goes fwd. if it has slightly less traction that the rear wheels then TC will alt between the two front wheels. depeding on how quickly this happens (relate to engine speed) will determine if things are going to break. With a boot full of welly at this time thats a lot of torque alt through the diff. don't forget you have got further than you would of normally by having the rear locker in in the first place so you are in conditions that beyond what the std driveteain was expected to deal with. if you have more aggressive tyres that normal too, you are adding to the strain that can be transmitted as you provide more grip. Most comp guys when going this route (without the TC) but fitting lockers fit HD shafts and CVs and 4 pin or stronger diffs to overcome the issue. when you add TC to the equation you have the ability to maximise all the torque to one wheel hence the issues breaking stuff if that wheel is struggling on traction/no traction and starts to shock load the drivetrain. Building an ARB into a diff is a 3hr job or so if you know what you are doing. just take care with the 'O' rings as they are easy to nip up and make sure the CW/P relationship is maintained. People are advised not to fit front lockers as yes std CVs can blow when you turn a corner. This is not something ARB would look to overcome  Its an issue with the LR drivetrain when using the vehicle outside of its design parameters. my advice would be to upgrade shafts and CVs prior to fitting any axle locker. Cheers
James 110 2012 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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13th Oct 2010 8:56am |
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