Member Since: 30 Jul 2010
Location: solihull
Posts: 298
air pressure
Hi guys can someone tell me the max operating pressure of the air tank please.
many thanks
robgone not forgotten 2 classics
gone forgotten 2 p38s
current d3 se 2006 td standard for now
24th Jul 2014 3:11 pm
Woolmeister
Member Since: 26 Mar 2007
Location: Chandler's Ford
Posts: 3464
Topix says:
Topix wrote:
The air suspension system is pressurised up to 16.8 bar (244 lbf/in²).
But that doesn't mean that is the maximum operating pressure of the reservoir.
Steve2021 BMW iX3 Premier Edition in Carbon Black ⚡️🔌
2019 Škoda Kodiaq 2.0 Tdi 190 DSG Sportline in Quartz Grey. Excellent vehicle. Gone.
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2007 Discovery 3 TDV6 S Manual in Zermatt Silver with Ebony Cloth (143k) Gone, but now patrolling the Asia section of the West Midlands Safari Park!
Back when the 3 was designed, the compressor max shutoff pressure was as above, 244 psig.
Then in April 2010, a fix was announced that reduced the shutoff pressure to about 205 psig or 14 bar.
As such, that is about the max pressure you would see in the air tank now and I doubt the tank is good for much more than that particularly as some are getting a corroded now.
The air springs run between 100 psig and 140 psig.
The link below has some files within my gallery with additional material.
http://www.disco3.co.uk/gallery/thumbnails.php?album=37782005 LR3 HSE 4.4L AJ-V8 petrol; Traxide Dual Battery; PIAA 2500K Yellow Ion H11 Fog Light bulbs; CounterAct LT-2 Capacitive Corrosion control; LLumar AIR80 Blue clear Infra Red blocking side window film; Liftgate manual release; Schrader Valve "air in" mod to OEM air suspension reservoir tank; Akebono ceramic pads; OEM solid vented discs; LR4 design hitch receiver; Wiggs D4 MOST bluetooth module; Clock on the Dash; 3 Flash signal light mod; Backup Camera; 2015/16 Nav Data update.
24th Jul 2014 3:33 pm
robo
Member Since: 30 Jul 2010
Location: solihull
Posts: 298
thank you both for replies,i have the amk compressor fitted it has been on 14 months hasn't done many miles but im now getting the bong and special functions swithed off message, have used soapy water cant see any leaks gutted if I need another compressor, only thing I have done is a hard reset after I blew a fuse and lost clock on the dash cant be related, can it suspension is not dropping overnight either just seems compressor isn't making enough air, any help gratefully received love the car hate all these problems gone not forgotten 2 classics
gone forgotten 2 p38s
current d3 se 2006 td standard for now
24th Jul 2014 5:32 pm
Woolmeister
Member Since: 26 Mar 2007
Location: Chandler's Ford
Posts: 3464
Recommend you carefully check the front of the reservoir for leaks again. I hear they are starting to rust through.
Have you had your fault codes read? That might help pinpoint where your problem lies.
Somebody will be along in a minute to try and flog you a BBS Nanocom Evo if you hang around long enough...
Steve2021 BMW iX3 Premier Edition in Carbon Black ⚡️🔌
2019 Škoda Kodiaq 2.0 Tdi 190 DSG Sportline in Quartz Grey. Excellent vehicle. Gone.
2017 Discovery Sport HSE Auto in Carpathian Grey and Ebony Leather. Modern JLR Junk. Gone.
2007 Discovery 3 TDV6 S Manual in Zermatt Silver with Ebony Cloth (143k) Gone, but now patrolling the Asia section of the West Midlands Safari Park!
24th Jul 2014 5:45 pm
robo
Member Since: 30 Jul 2010
Location: solihull
Posts: 298
have iid tool ,cant remember code but was something like slow to fill reservoirgone not forgotten 2 classics
gone forgotten 2 p38s
current d3 se 2006 td standard for now
24th Jul 2014 5:47 pm
Allan_T
Member Since: 10 Sep 2012
Location: Northampton
Posts: 1034
Re: air pressure
robo wrote:
Hi guys can someone tell me the max operating pressure of the air tank please.
many thanks
rob
The reservoir has a maximum working pressure of 333.5 psiGAP IID Pro Multi Vehicle Defender L316 2007-2015 - Discovery 3 - Discovery 4 - Discovery Sport L550 - Freelander 2 - Range Rover Evoque L538 - Range Rover L322 - Range Rover L405 - Range Rover Sport L320 - Range Rover Sport L494 Electrical Fault Diagnostics
24th Jul 2014 6:08 pm
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20836
The compressor will stop running when the tank hits around 18 bar
At normal ride height, the air springs hold around 10 bar
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8221
What if the relay sticks on?- will the compressor pump over 18 bar?
If I was the OP I would change the relay.It can when others can't,
It will when others won't,
It goes where others don't.
24th Jul 2014 8:37 pm
Allan_T
Member Since: 10 Sep 2012
Location: Northampton
Posts: 1034
Pilot Exhaust Valve
A solenoid-operated pilot exhaust valve is connected to the air delivery gallery, downstream of the air dryer. When the solenoid is energized, the pilot valve opens and pilot air moves the main compressor exhaust valve plunger to deflate the air springs as required. Pressurized air from the air springs and/or reservoir passes through the reservoir control valve to the air supply unit.
The solenoid has a resistance value of 4 Ohms at a temperature of 20°C (68°F)
Exhaust Valve
The exhaust valve has three functions. It operates in conjunction with the pilot exhaust valve to allow air to be exhausted from the air springs and/or the reservoir as described previously.
The valve also protects the system from over-pressure, since it is connected into the main pressure gallery which is always subject to the system pressure available in either the air springs or the reservoir. The valve restricts the maximum operating pressure to between 333.5 and 370 lbf/in2 (23.0 to 25.5 bar).
The minimum pressure in the system is also controlled by the exhaust valve to ensure that the air springs contain positive pressure, even when deflated. This protects the air spring by ensuring it can still ‘roll’ over the piston without creasing.
Air Reservoir
The reservoir is a steel fabrication, located on the outside of the left hand chassis rail in front of the air supply unit. The rearward end of the reservoir has a ‘Voss’ air fitting for connection of the air hose to the reservoir valve block.
The reservoir stores pressurized air to ensure immediate availability for fast air suspension lift times. It has a capacity of 550 in3 (9 liters). The nominal working pressure of the reservoir is 243.6 lbf/in2 (16.8 bar gage), with a maximum pressure of 333.5 lbf/in2 (23 bar gage).GAP IID Pro Multi Vehicle Defender L316 2007-2015 - Discovery 3 - Discovery 4 - Discovery Sport L550 - Freelander 2 - Range Rover Evoque L538 - Range Rover L322 - Range Rover L405 - Range Rover Sport L320 - Range Rover Sport L494 Electrical Fault Diagnostics
24th Jul 2014 8:45 pm
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8221
Interesting.It can when others can't,
It will when others won't,
It goes where others don't.
24th Jul 2014 8:50 pm
galwaygreen
Member Since: 30 Oct 2011
Location: plymouth
Posts: 6525
thanks for that allan t
impressed
24th Jul 2014 8:50 pm
Allan_T
Member Since: 10 Sep 2012
Location: Northampton
Posts: 1034
That was copied from the New Product Introduction 2005 LR3 Student Workbook, makes an interesting read GAP IID Pro Multi Vehicle Defender L316 2007-2015 - Discovery 3 - Discovery 4 - Discovery Sport L550 - Freelander 2 - Range Rover Evoque L538 - Range Rover L322 - Range Rover L405 - Range Rover Sport L320 - Range Rover Sport L494 Electrical Fault Diagnostics
24th Jul 2014 9:07 pm
robo
Member Since: 30 Jul 2010
Location: solihull
Posts: 298
many thanks tried the original hitachi relay no change will get a genuine relay and try that many thanks to all very very grateful !!!!!!!gone not forgotten 2 classics
gone forgotten 2 p38s
current d3 se 2006 td standard for now
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many thanks tried the original hitachi relay no change will get a genuine relay and try that many thanks to all very very grateful !!!!!!!
