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oneten110

Member Since: 02 Jul 2011
Location: Wish I was still in France
Posts: 741

Power steering fluid change frequency

Having checked the driver's hand book, quite a comprehensive document in the early days. Whilst it recommends checking and topping up of the PS fluid, it (as far as I can find) does not recommend changing it at any point.
Presumably it degrades to some degree over time and would benefit from being changed, any thoughts on how frequently?
I have just changed mine, along with the paper element filter, it having been in there for 75,000 miles. It is not a Defender, it is a One_Ten

26th Aug 2019 1:09pm

discomog

Member Since: 09 May 2015
Location: Notts/Lincs Border
Posts: 2525

2015 Defender 90 Puma 2.2 XS CSW Santorini Black

I've read various articles over the years on this subject and I think in reality nobody knows. Anything from annually, 60,000 miles, 100,000 miles and five years.

I guess if you're going to change it then 75,000 miles seems a good compromise. Defender 90XS SW
Mini Countryman Cooper S
Morgan Plus 8

26th Aug 2019 1:26pm

Grenadier

Member Since: 23 Jul 2014
Location: The foot of Mont Blanc...
Posts: 5804

2011 Defender 110 Puma 2.4 DCPU Corris Grey

Re: Power steering fluid change frequency

oneten110 wrote:
Having checked the driver's hand book, quite a comprehensive document in the early days. Whilst it recommends checking and topping up of the PS fluid, it (as far as I can find) does not recommend changing it at any point.
Presumably it degrades to some degree over time and would benefit from being changed, any thoughts on how frequently?
I have just changed mine, along with the paper element filter, it having been in there for 75,000 miles.

Did you notice any improvement? Freer? Quieter? More responsive? Nada? Monsieur Le Grenadier

I've not been everywhere, but it's on my list.....

2011 Puma 110DC - Corris Grey

26th Aug 2019 3:06pm

oneten110

Member Since: 02 Jul 2011
Location: Wish I was still in France
Posts: 741

Haven't been out in it yet. TBH after having examined the fluid that came out. I was pleasantly surprised by how clean and clear it was. It didn't appear to be any different to the new fluid.
A major part of draining the old fluid out was to enable me to see the bottom of the reservoir thus ensuring that I positioned the new filter correctly. It is not a Defender, it is a One_Ten

26th Aug 2019 3:42pm

oneten110

Member Since: 02 Jul 2011
Location: Wish I was still in France
Posts: 741

Quick update. Went out for a drive the other day and the steering feels, not quite sure how to describe this. It feels firmer, with perhaps a little more resistance, almost as though the fluid is thicker. I probably only noticed it because I was looking for there to be a difference. It is not a Defender, it is a One_Ten

31st Aug 2019 11:00am

Zed

Member Since: 07 Oct 2017
Location: In the woods
Posts: 3151

2010 Defender 110 Puma 2.4 XS CSW Santorini Black

Changed mine recently when fitting an Allisport reservoir. Made no difference at all to the steering.

The power steering reservoir looks very cool though.

31st Aug 2019 2:04pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 7838

2011 Defender 110 Puma 2.4 USW Stornoway Grey

It wont need changing before a mechanical failure in the fluid system. Think how hard it works in an auto box and that's approx 60k mile changes and comes out really dark sometimes. It's not worked hard and if right colour will be fine. Cheers

James
110 XS Utility
130 Puma Station wagon/camper (in the making)
90 Puma Hardtop

1st Sep 2019 5:14pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17192

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

Never changed mine on either vehicle, both of which are approaching the quarter-million mile mark.

1st Sep 2019 6:25pm

Bluest

Member Since: 23 Apr 2016
Location: Lancashire
Posts: 4144

2007 Defender 110 Puma 2.4 XS CSW Java Black

Does the power steering fluid lubricate the steering box, or does that have separate oil/grease? 2007 110 TDCi Station Wagon XS

1st Sep 2019 6:31pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17192

Yes, it lubricates the box and pump.

1st Sep 2019 7:26pm

oneten110

Member Since: 02 Jul 2011
Location: Wish I was still in France
Posts: 741

Interesting to note. whilst having a scrute at the bay of flea recently in search of a particular hose for the PS. I noticed a lot of PS fluid coolers for sale. From later LR models, which suggests that it either works harder on those vehicles or that it is degraded by heat?
One of the reasons I fitted the larger metal reservoir was to increase the quantity of PS fluid in the system, significantly as it worked out. It is not a Defender, it is a One_Ten

8th Sep 2019 1:41pm

gazman

Member Since: 17 Aug 2015
Location: Liverpool
Posts: 652

I've never changed it in any car previous to the defender or my 2nd car since. But on the landy it needed a new power steering box at 95k ish so it got changed via the leak and fitting if the new one 2014 - current ..... 2003 defender td5 90 (my car)
2009 - current .... 2005 zx10r

8th Sep 2019 2:34pm

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