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jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 7682

2011 Defender 110 Puma 2.4 USW Stornoway Grey

PAS system filters?

Just wondering is anyone aware of any filters being present in the pas system on a defender.

I believe the res have one as they were always classed as a service item. Vehicle in question is running an ali pas res so it's not there.

Issue is loss of pressure and then subsequent lack of assistance to steering. Fluid is discolouring, going dark within 2mins of running.

After fluid change it runs as it should until over 2mins it discolours again and assistance is reduced.

Increasing revs brings back assistance, as does changing fluid.

Evidence of black particles in fluid once its discoloured.

System flushed complete fluid changen4 or 5 times now. Cheers

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

26th Feb 2020 6:05pm

benniferj

Member Since: 20 Oct 2016
Location: Basingstoke
Posts: 361

I had no idea there is a PAS res filter in the original plastic tank.
Watching this thread with a keen eye!

26th Feb 2020 6:28pm

oneten110

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

In the original metal ps reservoir there is a paper element filter which can be changed but the price of a new filter is eye wateringly expensive.
The plastic reservoirs have a gauze mesh fitted underneath the white disc, not sure if that is available as a replacement part but it is possible to remove it for cleaning.
Black particles suggest seal/seals breaking down somewhere in the system.
The ps on mine occasionally feels a bit limp twisted but usually this is only at engine speeds below idling revs It is not a Defender, it is a One_Ten

27th Feb 2020 8:52am

90 Dreamer

Member Since: 13 Jul 2019
Location: Oop North
Posts: 2050

2016 Defender 90 Puma 2.2 HT Corris Grey

its not filtering the oil as an engine or fuel system filter would more to try and stop any foreign particles or devris making their way through the pump and in general they last the life of the car

as above more likely you have a pump / rack issue causing your problems

27th Feb 2020 9:45am

discomog

Member Since: 09 May 2015
Location: Notts/Lincs Border
Posts: 2494

2015 Defender 90 Puma 2.2 XS CSW Santorini Black

A bit like the filter in the top of the screen washer bottle. Defender 90XS SW
Mini Countryman Cooper S
Morgan Plus 8

27th Feb 2020 9:48am

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 7682

thank you for replies, i am thinking pipes deteriorating. on a 93 vehicle.

Its had new pump and new box. Cheers

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

27th Feb 2020 12:37pm

oneten110

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

That is another possibility. If you have a branch of Pirtek near you it might be worth your while to pop in and have a chat with them. They have everything needed to replace the rubber elements of the pipes for a fraction of the cost of renewing the entire pipe. It is not a Defender, it is a One_Ten

28th Feb 2020 9:00am

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