 | Home > Puma (Tdci) > Idle jack |
 
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| Landie Boy Member Since: 14 Jan 2011 Location: Essex Posts: 431   
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Hi,
Idle jack is designed to keep the Defender going at a constant speed. i.e. on a hill or going over rocks etc.. as you would be going on a tarmac flat surface. I think there was a thread on this before, do a search. HTH Jack |
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22nd Aug 2011 4:18pm |
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| bpman Member Since: 21 May 2008 Location: Oslo Posts: 8069 
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might be related to this ...
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22nd Aug 2011 5:33pm |
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| eutek Member Since: 03 Mar 2009 Location: High Wycombe Posts: 586 
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I get the same rattling and clattering in high as well...  |
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22nd Aug 2011 7:30pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17339 
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Not quite; anti-stall does that. The idle jack is provided because low first on a Puma (with the GFT MT82 six speed main box) is so low geared it would provide a dangerous amount of engine braking on steep off-road descents resulting in loss of control. Hence the idle speed increases under these conditions to match the vehicle speed roughly to that of a vehicle with the five speed R380. The chatter is the result of backlash in the transmission, the engine power characteristics, and possibly the classic Puma clutch problem, and seems to be normal sadly. |
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22nd Aug 2011 8:06pm |
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| tatra805 Member Since: 16 Aug 2011 Location: Dolany Posts: 436  
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Inspired by this topic i made a couple of videos.
Couldnt find a lot on the web clearly illustrating the idle control of the puma. All videos are made with feet from the pedals and in 1st low diff lock engaged. FYI going uphil 1100rpm, downhill going up to +-1800rpm Yes, the clutch is 1st generation and makes a lot of noise (60000km) Uphill outside 
Uphill inside
Downhill outside
Downhill Inside
And as a reference a pic showing the incline
Without intending to start a brand bashing discussion, on the hill in the video Landrovers (Def/D3 and RR) are the only ones driving up on idle. We've tried it with other normal 4x4's and they will all stall at some point. Just as a sidenote the 110 drives it up during rain also, with TC engaging at different points but without drama or risk. And that just makes me smile big time everytime. :D Admin note: this post has had its images recovered from a money grabbing photo hosting site and reinstated  |
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30th Aug 2011 8:07pm |
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