Hitachi Air Suspension Compressor Non-Return Valve Repair Kit
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SYMPTOMS OF FAULT Is your vehicles air suspension rising slowly, noisily, or perhaps failing to rise at all? EAS Amber light lit? Fault code C1A20, C1A1364, C50, or C1A20-64 showing? One or more of these errors: “Suspension error only normal height available” “Suspension fault; pressure not rising quick enough” Or “Pressure does not decrease when venting gallery”? THE FAULT ![]() The piston seals within your vehicles EAS air compressor are likely worn, filters saturated and the dryer end cap failing reducing output significantly. The likely cause of the faults noted above and most common cause is a worn piston and glide ring within the air suspensions compressor unit. Coupled with saturation of the filters in the compressors drier unit. This results in reduction of compressor output and triggers vehicle faults as well as extending the time taken to lift the vehicle. The original design for the dryer end cap was poor and cracks can develop around the air line collets causing leaks and vehicle faults. However, whilst refurbishing the compressor, the components within the non-return valve (also known as the delivery valve) get lost or break. The plunger within the valve commonly deteriorates and leak, causing the compressor to leak internally. Also, the screw itself often becomes damaged upon removal.
THE SOLUTION
![]() Fit our replacement non-return valve parts whilst refurbishing your compressor to prevent further issues Save yourself time and headache by purchasing our non-return valve repair kit. We offer a full kit comprising of all components within the non-return valve, including a replacement plunger, screw, spring and o ring. All direct replacements for the OEM components. UK stock Constructed out of high quality materials to last the lifetime of your vehicle Next day delivery available OEM design Land Rover Discovery 3 4 Range Rover Sport L322 Air Compressor Piston Seal Repair Installation Instructions - YouTube Video will open in a new window Land Rover Discovery 3 4 Range Rover Sport L322 Air Compressor Filter Repair Installation Instructions - YouTube Video will open in a new window
VEHICLES AFFECTED Land Rover Discovery MK3 2005 to 2009 Land Rover Discovery MK4 2009 to 2012 Ranger Rover Sport 2005 to 2013 Range Rover L322 2006 to 2009 Original Hitachi Compressor Only
These collets will only repair the original Hitachi compressor illustrated above. YOU WILL RECEIVE ![]() 1 x Non-return valve screw 1 x Spring 1 x Plunger 1 x O ring |
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