 | Home > Puma (Tdci) > Puma hand throttle |
 
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| BogMonster Member Since: 05 Feb 2008 Location: Stanley Posts: 400   
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Hi all, wonder if I could pick your brains please
I've had a call from somebody running a cherry picker conversion based on a Puma, they are having some concerns about the fact that the hydraulics run quite slowly and if you put the gearbox in a higher gear it chatters quite a bit due to low engine revs and they are worried about the clutch - apparently it's not an uncommon thing and they had the same issue with their old Tdi cherry picker which used to eat clutches quite regularly. Is there a "hand throttle" available for a Puma? Obviously the throttle is electronic so short of wedging something on the pedal a mechanical option is not really possible but interrupting the signal and modifying it would be straightforward if you knew what to do. Does anybody offer anything like this as an off the peg conversion? Thanks BM |
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21st Mar 2011 5:36pm |
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| Dan A Member Since: 12 Mar 2011 Location: West Yorkshire Posts: 61  
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Hi we have a hand throttle on one of our transit skip wagons which has the same engine, if you send me your email I will forward you some pictures of it. The company that did the work are called Webb truck equipment.
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21st Mar 2011 5:52pm |
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| TJ101 Member Since: 30 May 2007 Location: Taunton Somerset Posts: 3748  
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Correct,, In, "Set up" mode, i can test the signals etc, and set the revs to any speed required,, BUT a right ball ache to get it to work as a cruise control,, (wish i had never bothered,, More on that later  )
For you friend Stephen, the cruise system would be over the top, for the job,, But should be a simple job i would have though, to wire something similar ??  California F1, 75th 110 "Kermit", 50th Ann V8, 90 V8 Hybrid, 55 Series 1
Main Brian James Trailer Dealer for South West UK |
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21st Mar 2011 10:15pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17337 
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I have often wondered about this myself, mainly for winching, both on by TD5 and TDCi engined vehicles.
It seems to me that all that is needed is a means to switch out throttle position sensor resistors in the pedal assembly and substitute fixed values to run the engine at the desired speed. This would not have any feedback, so under load the engine would slow however, but is in effect exactly the same in function as the had throttles of old. Does anyone know of a product on the market for this? The Nissan Navara has a switch on the dash to select a fast idle to speed up engine warmup. It is interlocked with neutral, but for winching would be ideal. As far as I know, it does however merely provide a "fast idle" input into the ECU. |
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22nd Mar 2011 11:25am |
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| noworries4x4 Member Since: 24 Dec 2010 Location: Newton Abbot Devon Posts: 1195 
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I do recall on the option list when i ordered the 90 in 2007 a hand throttle option but it was
 expesive 4 figures expesive, but when i am winching hard i need more power, so i use a site survey stick wedged on the bulkhead and seat on the pedal but it still luggs down even when you've got the engine running at 1800revs and winching hard the alternator still nearly stalls the engine. so a proper hand throttle that fuels the engine correctly under load would be great but not at land rover prices If everything is under control you are not going fast enough.
Every Day 16 MY Discovery 4 Commercial Workshop and Escort Vehicle Weekends 07MY L322 TDV8 Vogue SE Series 1 80" 3ltr 6cyl with overdrive No Worries 4X4 |
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26th Mar 2011 7:09pm |
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| mse Member Since: 06 Apr 2008 Location: UK Posts: 5035 
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Just looked through the book, as its out...you are correct
under "Interior enhancements & Cargo Protection" in the Special Vehicle Operations Options - Hand Throttle (for use with PTO) PN 822SV List: £1160.92 and the throttle jack same part number but is list £886.69 Mike |
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26th Mar 2011 9:38pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17337
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That's outrageous! I can't imagine that it is more than a switch and some software (at least I don't see why it needs to be). Anyone here got one and can tell us about it? |
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29th Mar 2011 9:38am |
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| BogMonster Member Since: 05 Feb 2008 Location: Stanley Posts: 400
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The problem would be that the Puma like all electronic throttle vehicles has multiple tracks in the pedal pot for fault detection and safety (i.e. so you don't get full throttle when it breaks and end up parked in somebody's front room; a feature offered only on Toyotas at the time of writing).
To bypass it with fixed settings you'd have to have a fairly accurate pair of values to make it work. I know this from bitter experience with getting a very expensive fire vehicle conversion from a major UK conversions company, based on a Puma Defender. The vehicle has an on board generator fitted but as soon as you engage it, it trips a fault code and warning light on the engine ECU because when they built it they obviously either screwed up their wiring or designed it wrong so it only adjusts one track on the throttle. You would think it would be easy to sort out but they never did fix it and eventually started ignoring my emails. Not going to be using them again!! |
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13th Apr 2011 4:09pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17337
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I haven't lookd into the Puma TPS, but I know that the TD5 started out with two tracks (one running 0 to 12v and the other 12v to 0) but quite early on a third was added. Does the Puma have more than 3?
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14th Apr 2011 11:15am |
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| BogMonster Member Since: 05 Feb 2008 Location: Stanley Posts: 400
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OK I established that the 822SV only fits a Td5.
Correct on Td5 pots, early vehicles had two later ones all had three, though you can fit either sort to any age and just change the flag in the ECU. Pumas, as far as I can tell from the diagnostics, just have two tracks. |
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14th Apr 2011 8:05pm |
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| diesel_jim Member Since: 13 Oct 2008 Location: hiding Posts: 6089 
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There was a company (on ebay somewhere, i'll have a mooch about) based in the US that did generic "hand throttles" for GMC's and other American stuff that used drive by wire technology.
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15th Apr 2011 7:05am |
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| LOSTALOT Member Since: 22 Apr 2011 Location: cornwall Posts: 1
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hi we have a 300tdi with a set from tuner engine contols it takes the speed from a sensor looking at the flywheel as we have a pto driven 10kva generator they may be able to help
0118 981 5178 i know its not a puma but  |
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25th Apr 2011 10:19am |
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| 200TDi Member Since: 28 Feb 2011 Location: SW Scotland Posts: 11
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The throttle pedal contains two potentiometers the two signals to determine the position, rate of movement and direction of movement of the pedal, thats at most 6 wires and as two could stay attached a double pole switch could be used to 'change over' from the one in the pedal to a second mounted as a hand throttle, in the event of TPS sensor failure you'd have a spare with you as an added bonus
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26th Apr 2011 7:31am |
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