Network Computing Devices 2190 - Manual (Page 4)

Important: In order for the air spring to function properly, there must be
a minimum of 1/2" of clearance around the air spring. The right-side parking
brake-line must be tied to the brake-line bracket on the axle housing to prevent
it from interfering with the normal operation of the left-side air spring see
Figure "D".
S
TEP
4 - I
NSTALL THE PASSENGER
'
S SIDE ASSEMBLY
Follow steps 2 - 5 for assembly and installation of the passenger's side
assembly. Note: The use of a heat shield is required on the passenger's side of
the vehicle. The heat shield will mount between the upper bracket and the air helper
spring see Figure "E". Position the shield halfway between the nearest point of
the exhaust pipe to the rubber air spring. Ensure that the heat shield will not interfere
with the normal operation of the air spring or the vehicle's suspension. Do not
position the face of the shield directly over the axle, as it may contact the axle on
full suspension compression.
S
TEP
5 - I
NSTALL THE AIR LINE AND INFLATION VALVE
Uncoil the air tubing and cut it in two equal lengths. DO NOT FOLD OR KINK
THE TUBING. Make the cut as square as possible. Insert one end of the tubing
into the push-to-connect elbow fitting installed in the top of the air helper spring
as far as possible.
Select a location on the vehicle for the air inflation valves. The location can be
on the bumper or the body of the vehicle, as long as it is in a protected location so
the valve will not be damaged, but still maintain accessibility for the air chuck see
Figure "F". Drill a 5/16" hole and install the air inflation valve using two 5/16" flat
washers per valve as supports see Figure "G". Run the tubing from the air helper
spring to the valve, routing it to avoid direct heat from the engine, exhaust pipe, and away from sharp edges. Thermal sleeves
have been provided for these conditions. The air line tubing should not be bent or curved sharply as it may buckle. Secure the
tubing in place with the nylon ties provided. Push the end of the air line tubing into the inflation valve see Figure "G".
S
TEP
6 - C
HECK THE AIR SYSTEM
Once the inflation valves are installed, inflate the air helper springs to 70 psi and check the fittings for air leaks. Using a spray
bottle, apply a solution of soap and water to the fittings. If a leak is detected at a airline tubing connection then check to make
sure that the airline tube is cut as square as possible and that it is pushed completely into the fitting. The airline tubing can easily
be removed from the fittings by exhausting all the pressure in the air springs and then pushing the collar towards the body of the
fitting and then, with a pull, remove the airline tubing. Reinstall the tubing and reinflate the air springs and check for leaks as noted
above. If a leak is detected where the air fitting screws into the spring, just screw the air fitting into the air spring until the leak
stops.
This now completes the installation. Install the wheels and torque the lug nuts to the manufacturer's specification. Raise
the vehicle by the axle and remove the jack stands. Lower the vehicle to the ground. Reattach the negative battery cable and
remove the wheel chocks from the front wheels. Before proceeding, check once again to be sure you have proper clearance
around the air springs. With a load on your vehicle and the air helper springs inflated, you must have at least 1/2" clearance around
the air springs. As a general rule, the air helper springs will support approximately 50 lbs. of load for each psi of inflation pressure
(per pair). For example, 50 psi of inflation pressure will support a load of 2500 lbs. per pair of air helper springs. FOR BEST
RIDE use only enough air pressure in the air helper springs to level the vehicle when viewed from the side (front to rear). This
amount will vary depending on the load, location of load, condition of existing suspension and personal preference.
NOTE:
Too much air pressure in the air helper springs will result in a firmer ride, while too little air pressure will allow the air helper spring
to bottom out over rough conditions. Too little air pressure will also not provide the possible improvement in handling. TO
PREVENT POSSIBLE DAMAGE, MAINTAIN A MINIMUM OF 5 P.S.I. IN THE AIR HELPER SPRINGS AT ALL TIMES.
F IGURE "F"
AIR LINE
PUSH-TO-CONNECT
INFLATION VALVE
FLAT WASHER
HEX NUT
VALVE CAP
BODY OF
VEHICLE
AIR HOSE
INFLATION
VALVES
BUMPER
AIR
SPRINGS
NOTE:
Once the air helper springs are installed, it is recommended that the vehicle not be lifted by the frame, as over-
extension may occur, resulting in damage to the air helper springs. However, should it become necessary to raise the vehicle
by the frame, deflate both air helper springs completely.
F IGURE "G"