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Naf



Member Since: 07 Dec 2016
Location: Sandbox
Posts: 412
Kuwait 2000 Defender 130 Td5 HCPU Nato Green No Canopy
Rear Steer assist
I have a dream, part of this dream is rear steering assist.

I am looking to install rear steer assist on salisbury axles, with porta-axles.

The question is it as simple as bolting on the front steering components onto the rear axle?

Also do i have to get special porta-axles for the rear or it doesnt matter as they just bolt onto the output shaft...

If everything is compatible do i still retain the capacity or do i lose some capacity? I will probably be running the 500kg OME rear springs with the hd fronts to handle the extra weight from the OM606 engine.
Post #714662 27th Jun 2018 8:19am
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 8030
 2011 Defender 110 Puma 2.4 USW Stornoway Grey
Hydro rear would the easiest actuation on std front swivels to suit your axle/portal setup. Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop
Post #714670 27th Jun 2018 8:48am
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 8030
 2011 Defender 110 Puma 2.4 USW Stornoway Grey
Plus a way of locking it straight. some use a rigid bar locking the ram in place. Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop
Post #714671 27th Jun 2018 8:49am
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Naf



Member Since: 07 Dec 2016
Location: Sandbox
Posts: 412
Kuwait 2000 Defender 130 Td5 HCPU Nato Green No Canopy
I was thinking of creating a hydrostatic system that uses two potentimeters, one on the front steering box, and one in the rear for feedback. A steering pump with electronic valve. Have a speed input and program the system to do one of two options.

Auto, where below set speed the rear will steer opposite to the front, and above set speed will crab steer in the same direction.
Off, where the front only steers
manual opposite steer
Manual crab steer

Also have a bar in case of failure

But the is i add cv to the rear, how much capacity do i lose?
Post #714678 27th Jun 2018 9:19am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17384
United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
The "normal" way for implementing rear-steer on a Defender/Series is to take a front axle and cut and weld the axle tube to allow it to be fitted at the rear, then use a hydraulic ram for steering activation. It was widely done on trials vehicles back in the day.
Post #714683 27th Jun 2018 9:47am
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