I know I will be ribbed for asking this question; and it will be pointed out that I am obsessive about (preventative) maintenance - so be it
I can't see any reference to maintenance of the D4's air suspension in JLR schedules, maybe I have missed it?
I have however noticed that it has been suggested that the suspension benefits from maintenance, in particular:-
1. Changing the desiccant and filters; and
2. Maintaining/servicing the compressor.
At what mileage/age should this be done, and what is involved in 2 above?
TIA
NJSS
2nd Jan 2023 10:36 am
Oxford-boy
Member Since: 07 Sep 2015
Location: Oxford
Posts: 1063
HNY to you.
I cannot assist on 1. but in terms of 2., the compressor, mine has just failed and been replaced at 8 years 6 months old and 80k miles. Moderate use of suspension and average to above average towing usage.
Therefore I think servicing the compressor before then might help to give your timescale some context. What needs doing with a compressor service is something for others.
Wasn't a cheap item but WD (old one) made it bearable..Jim
2014 Discovery 4 XXV SDV6 Causeway Grey
2016 Discovery 4 HSE Lux SDV6 Loire Blue - now gone
Hopefully someone will be able to advise on (preventative) maintenance
I am surprised that there appear to be no JLR recommendations.
NJSS
Last edited by NJSS on 3rd Jan 2023 9:19 am. Edited 1 time in total
3rd Jan 2023 8:42 am
LT
Member Since: 31 Dec 2005
Location: South West
Posts: 23366
Nige, i know that you use your D4 off road. I used to take off the compressor covers and clear out all the muck.
The noise/vibration deadening material is sponge like and seems to be almost permanently wet. Which apparently is nothing to worry about.
If you haven’t done this, you might find a surprisingly large amount of mud/dirt.2006 D3 HSE (Original & still the best)-GONE
2010 D4 HSE (A bit bling)-GONE
2014 D4 HSE (Almost too bling)-GONE
2015 D4 HSE (A heated what?)-GONE
2016 D4 Landmark (Written Off)-GONE
2016 D4 Landmark (Surely the last!) PD1881 rims-GONE
2017 FFRR SDV8 Autobiography
I tend to do as you suggest in the Summer, when it's warmer to work under one's car
I am surprised that no one has any other ideas for routine maintenance, or suggestions at what mileage/age one should change the desiccant and filters.
NJSS
3rd Jan 2023 4:25 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13635
Must confess like ur good self the only thing I found was the following from the workshop manual
Air Suspension
1. Every 5 years or 75,000 miles (120,000 km) - Vehicles operating under arduous conditions: Replace air suspension compressor filter. For additional information, refer to Air Suspension Air Filter (204-05 )
So I wonder if the dryers desiccant should be replaced/ checked every 2-3 years or with the gaps iid live data if monitoring the air compressors motor temperature along with the air compressors pressure as I would assume as the desiccant material becomes blocked the motor temperature would rise and air pressure reduced
Apologises as know that’s not really much help
Ps, think the data is for a hitachi compressor
3rd Jan 2023 5:28 pm
Moleshome
Member Since: 15 Oct 2020
Location: Wokingham
Posts: 412
Is that the air filter behind the near side panel in the boot?
?t=525
3rd Jan 2023 6:17 pm
VVS210
Member Since: 05 Aug 2015
Location: Hampshire
Posts: 506
Had to replace my drier about 2 years ago, so circa 120k miles and 10 years old, due to repeated suspension faults coming up.
As suspected there was a crack in the cap on the top of the drier unit between the two air lines. I bought a second hand 'donor' unit from a scrapyard and a refurbishment kit online then rebuilt the donor drier unit with new filters and desiccant before doing a simple swap over. Desiccant was all clumpy and had degraded so clearly due for replacement.
Still got the rest of the donor unit and all the parts to refurbish the pump itself but so far not required them 🤞D4 - Stornoway Grey
D2 V8 - Zambesi Silver (rust free JDM import 😎)
FL2 - Sd4 HSE
110 Td5 DCPU - Bonatti Grey - sold
FL2 Td4 - Zambesi Silver - sold
D2 Td5 - Epsom Green - sold
F1 Td4 - Giverney Green - sold
90 300 Tdi - White – sold BIG mistake should have kept it!
F1 Td4 - written off by a taxi!
D1 300 Tdi - written off by a Fiesta...
D1 200 Tdi - sold
90 Turbo Diesel - sold
Ser 2a SWB - sold and glad I 'got rid'
Ser 2 SWB - sold but wish I still had it!
Hopefully someone will be able to advise on (preventative) maintenance
I am surprised that there appear to be no JLR recommendations.
NJSS
From my investigations no routine checks or preventative maintenance possible hence not detailed by LR;
AMK type
The main issue is piston ring wear. Over time wear in the ring reduces the ability to compress air in the chamber. It becomes less efficient with use and so has to work harder, which speeds up wear.... They can be changed put is a repair.
The only other item of wear are the motor bushes. Last a long time but again no routine action possible. Replace when worn out.
Hitachi type
No experience with this type but I’m saying it is the same situation as the AMK
10th Sep 2023 9:29 am
Weyboat
Member Since: 13 Apr 2018
Location: Weymouth
Posts: 261
Just by the filtration kit from 4x4airseals.com and follow the instructions in this youtube video.
Gone 2016 Landmark D4
Current 2015 HSE D4 - AKA - 'Gandalf the Grey'
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