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  #1  
Old February 11th, 2013, 01:58 PM
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Removing power steering

Has anyone ever removed the power steering from a defender/discovery/RRC?

Basically my question is can you just plug the hose ports and remove the pump and will everything be fine other than additional force required to turn?

I guess another way to ask this would be - is there a difference in gear ratios between a manual steering gearbox and a power one?

Tia
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  #2  
Old February 11th, 2013, 02:01 PM
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The force required to turn will be significantly more than if it were originally designed to be a manual steering box. The number of turns lock to lock is different between the manual and power steering boxes, so yes the gear ratio is different. It's not very much fun using a power steering box without the power
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Old February 11th, 2013, 02:03 PM
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I've never seen a manual steering gear for Disco/RRC... You would probably be better off just looping the two ports on the box together, the fluid lubes the steering box and when the lines are off , and you turn the wheel, it does force fluid out of the ports.
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  #4  
Old February 11th, 2013, 02:20 PM
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It would be easier to grab a used manual box from a Defender. Lots get thrown in the bin around here.

Is there any sane reason to do this?
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Old February 11th, 2013, 02:24 PM
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Baldewin's D90 has a manual box and can be a real bear to turn on trail. He's recently sourced a p/s setup from a the UK so he can convert his truck to P/S. I cant imagine running a rig on trail with a power steering box with the lines looped. Would be harder to steer than a regular manual box which is a real PITA as it stands.
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Old February 11th, 2013, 02:25 PM
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Perhaps not a sane reason, but it would be for simplicity on my hybrid project allowing me to not need a ps pump. If the gearing was the same as manual I think I'd be fine with it but it sounds like this may be an issue.

I haven't looked closely enough to tell what difference there my be between this and a defender, but this is a 93 RRC chassis/steering
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Old February 11th, 2013, 02:30 PM
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Oh and it's going to be a mall cruiser so not worried about the effort needed as long as its on par with a series
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Old February 11th, 2013, 02:32 PM
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Just go drive a series on the trail for a day.

You build up great arm muscles and wish for PAS
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Old February 11th, 2013, 02:34 PM
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Ahh, if thats the case then i'd just source a D90 manual box if its going to be relegated to mall cruising duties..
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Old February 11th, 2013, 03:03 PM
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I used to have a manual box. It was MUCH easier to turn than than the power box with a dead pump. I do not think they are designed to work well without pressure. I gave away the box. They are nice and compact and should be easy to find free.
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Old February 11th, 2013, 03:07 PM
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Yes, just get a manual box. I know early RRCs had manual boxes and I know power boxes are the same between a D90 and an RRC disco so I would assume if you could find a manual LHD defender box (ex-MOD take off would be your best bet me thinks) it would be fine. I would try to find a complete set up.

OTOH, personally, I would use the series rover box and relay since you already have them and the chrome spoke steeringwheel is cool. That is what a number of the hybrids I have seen do and it seems fine. All you would need is a custom drag link between the steering arm on the bottom of the relay and the axle. I believe the taper on the series and coiler ball joints are different.
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Old February 11th, 2013, 03:16 PM
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Thanks everyone. It sounds like a lhd manual gearbox is the way to go. I will always have the option of converting back to power steering if I feel the need.

Given this is an RRC frame/axles/steering I think it's best to keep all of that as-is. The steering column and wheel will stay series though!
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Old February 11th, 2013, 03:19 PM
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Quote:
Originally Posted by cgalpin View Post
Basically my question is can you just plug the hose ports and remove the pump and will everything be fine other than additional force required to turn?
Hi Charles,

Based on some tests with my PS steering box, I can say that you can run the PS steering box without a pump. I'm assuming that you must run the PS box with PS fluid as lubricant. Therefore I do not recommend blocking the low pressure ports as fluid will need to be ejected as you move from lock to lock. The easiest way to account for this is to run the P/S fluid reservoir connected to the steering box. Not sure what to do about the HP ports. It may be as simple as shunting them together with hose or you may need an intermediate reservoir.

Either way, I believe the ports must not be blocked.

will update with progress on my project tonight
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  #14  
Old February 11th, 2013, 04:02 PM
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Ed, it is near impossible to turn a power box without power to it.
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Old February 11th, 2013, 04:29 PM
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Good point! I was so locked on a way to make it possible, I didn't even think about whether or not it was practical
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Old February 11th, 2013, 04:48 PM
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Naah we park out at the back of the lot to avoid scratching our paint, so just wide turns needed

Quote:
Originally Posted by JSBriggs View Post

And since its going to spend alot of time at the mall, pulling into a parking spot would be tough.

-Jeff
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Old February 11th, 2013, 07:22 PM
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Or you could keep with the theme and fit electric power steering
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Old February 11th, 2013, 09:43 PM
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I have a couple LR manual steering gearboxes about. Found them in the far end of the mall parking.
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  #19  
Old February 12th, 2013, 08:52 AM
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Quote:
Originally Posted by dave_lucas View Post
Or you could keep with the theme and fit electric power steering
An electric powered pump yes . But at least initially I'd like to avoid it. If I do go that route I'm going to want to get fancy and only run the pump at low speed - gotta keep it simple to get it done though!

Quote:
Originally Posted by JSBriggs View Post
Speaking of parking at the mall, have you looked into what kind of charging plugs are at the special electric vehicle spots they offer (and no one ever uses)?
Don't be a hater. I'll go with the standard
http://en.wikipedia.org/wiki/SAE_J1772

Quote:
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I have a couple LR manual steering gearboxes about. Found them in the far end of the mall parking.
LOL. Thanks, but I believe I have one lined up from Randy (British Boneyard) who's closer and I see from time to time so can avoid shipping.
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  #20  
Old February 12th, 2013, 09:59 AM
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Run pumpless! I think you could cannibalize the electric power steering adapter from a Nissan Versa or a Toyota!

They are not integral to the rack and pinion (designed to be inline to the splined steering shaft) and come with their own ecu. hack the planet!

http://www.docstoc.com/docs/53638873...g-Instructions
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