C-2608
ARNOTT REAR COIL SPRING CONVERSION KIT
FOR 1997-2002
FORD EXPEDITION/LINCOLN NAVIGATOR (4x4)
The air suspension system is under pressure (up to 10 bar, or 150 lbf/in). Verify pressure has been relieved and disconnect power to the air suspension system prior to disassembly. Do not allow dirt or grease to enter the system. Always wear standard hand, ear, and eye protection when servicing the air suspension system.
Arnott® is committed to the quality of its products. If you have a question or problem with any Arnott product, please contact Arnott by calling 800-251-8993 during normal business hours or email
Reading this manual signifies your agreement to the terms of the general release, waiver of liability, and hold harmless agreement, the full text of which is available at
Not to be stored below 5°F (-15°C) or above 122°F (50°C).
Avoid damage to air lines and cables.
Removal and installation is only to be performed by fully qualified personnel.
Use car manufacturer’s diagnostic software.
Damage to the vehicle and air suspension system can be incurred if work is carried out in a manner other than specified
in the instructions or in a different sequence.
To avoid the possibility of short circuits while working with electric components consult your owner's manual on how to
disconnect your battery.
Consult your vehicle owner's manual, service manual, or car dealer for the correct jacking points on your vehicle and for
additional care, safety and maintenance instructions. Under no circumstances should any work be completed underneath
the vehicle if it is not adequately supported, as serious injuries and death can occur.
1. TURN THE AIR SUSPENSION SWITCH TO THE OFF POSITION. (SWITCH IS LOCATED ON THE
RIGHT FRONT KICK PLATE)
2. LIFT VEHICLE AND REMOVE BOTH REAR WHEELS.
3. REMOVE AIR SPRING SOLENOID RETAINING CLIP.
4. REMOVE ELECTRICAL CONNECTOR AND AIR LINE FROM AIR SPRING SOLENOID.
5. ROTATE SOLENOID COUNTERCLOCKWISE TO THE FIRST STOP, AND THEN CAREFULLY PULL
OUT TO VENT THE AIR PRESSURE FROM THE AIR SPRING. AFTER AIR SPRING IS DEFLATED,
TURN AGAIN AND COMPLETELY REMOVE SOLENOID FROM AIR SPRING.
6. WITH PLIERS, OR A SUITABLE HOOKED TOOL, REMOVE THE CLIP THAT SECURES THE TOP OF
THE AIR SPRING TO THE CHASSIS. NOTE: TO ACCESS THE CLIP, GO UNDER THE WHEEL ARCH,
BETWEEN THE BODY OF THE VEHICLE AND THE CHASSIS.
7. REMOVE THE PISTON-TO-AXLE SPRING SEAT CLIP. (AIR SPRING IS HELD IN PLACE WITH A
ROUND RETAINER CLIP UNDER THE PISTON CAP. TO UNSNAP CLIP, GENTLY PRY BETWEEN THE
PISTON AND THE AXLE. CLIP WILL UNSNAP WHEN PRESSURE IS APPLIED)
8. CAREFULLY REMOVE AIR SPRING FROM THE VEHICLE.
9. SEAL OFF HOSE TO PREVENT DIRT OR GREASE FROM ENTERING SYSTEM.
10. REMOVE BOTH REAR SHOCKS TO ALLOW AXLE TO HANG FREE UNSUPPORTED.
THIS WILL GIVE YOU EXTRA CLEARANCE FOR THE COIL SPRING.
Tighten all nuts and bolts to manufacturer's specifications during the installation process.
Tie the wires and air hose back away from any hot or moving parts. Do not cut the wires. Leave the system
whole in case you ever want to reinstall air suspension on the vehicle.
1. INSTALL THE COIL SPRINGS ONTO THE REAR AXLE.
2. USING A FLOOR JACK, RAISE THE REAR AXLE.
3. INSTALL THE REAR SHOCK ABSORBERS.
4. INSTALL THE LOWER SHOCK ABSORBER RETAINING NUT AND BOLT TO THE REAR AXLE.
5. REMOVE THE REAR AXLE SUPPORT.
6. REPLACE TIRE AND WHEEL ASSEMBLY.
7. REMOVE ALL SAFETY STANDS AND LOWER VEHICLE.
8. LEAVE THE AIR SUSPENSION SWITCH IN THE OFF POSITION.