Ridewell Suspensions RSS-233 - Page 5

233-Truck-20K-ISM-RevB-07-06-18 Page 5 ENG
Final Assembly and Inspection
1. Verify that all suspension component bolts/nuts
are torqued to specications (Appendix).
2. Install wheels and tires.
When lowering an auxiliary axle on an
unloaded vehicle, pressure to the load air springs
must be reduced to below 10 psi. Failure to
reduce the air pressure could cause the vehicle’s
drive axles to rise from the ground and the ve-
hicle could roll in an unsafe manner.
3. Check that tires are inated to recommended
pressure. Check wheel hubs for proper level of
lubricant recommended by the manufacturer.
4. Lift the axle to the raised position. Check the air
system tubing and connections for leaks.
5. Check that wheels can rotate freely and that
brakes and slack adjusters are properly adjusted.
6. Raise and lower the suspension assembly (wheels
and tires installed) through the entire range of
travel. Make sure that sucient clearances for air
springs, brake chambers and other components
has been provided.
7. Check the vehicle’s reverse travel options:
7.1 Check steer lock operation.
7.2 Check automated system (if installed) to
make sure that suspension raises/locks wheels
during reverse travel.
Failure to check reverse travel operations
can result in component damage and void the
suspension warranty.
Do not lower the auxiliary axle while
the vehicle is moving in forward or reverse travel
above 10 mph.
8. Check wheel toe-in seing and adjust, if neces-
sary (between 1/32” and 3/32”).
Wheel Toe Setting
Wheel toe is the relationship of the distance between
the front of the tires and the distance between the
rear of the tires on the same axle. When the front dis-
tance is less than the rear distance, the wheels are in a
“toe-in” (positive toe) condition.
The correct seing for the RSS-233 suspension should
be toe-in between 1/32” and 3/32”.
Check Wheel Toe Seing
1. Deate the air springs.
2. Lift the axle enough for tires to rotate freely. Sup-
port with jack stands to ensure axle is level.
Air springs pressure regulates axle load
The load capacity of the auxiliary axle is adjusted
by increasing or decreasing the pressure to the air
springs. By applying more air, the lift axle takes on
a greater percentage of the load’s weight. The load
capacity is decreased as the air pressure decreases.
Accurate readings of the load capacity can be ob-
tained by parking a loaded vehicle over a calibrat-
ed scale and lowering the axle onto the scale. The
air pressure to the air springs is manually adjusted
up or down to obtain the axle load weight at vari-
ous air pressures.
Do not exceed the rated load capacity of
the suspension system or other components. Ex-
ceeding the capacity can cause component failure
and void the warranty.
3. Position tires to point straight ahead. Spin each
tire. Use a piece of chalk to mark a line on the
center tread all the way around the tire.
4. Use the centerline mark to measure the distance
from the front of the tire to the frame. Measure
the distance from the back of the tire to the frame.
5. Subtract the front of the tire distance from the
rear distance to obtain the wheel toe seing.
Adjust Wheel Toe
1. Loosen clamps on both ends of the tie rod. Twist
the tie rod forward/backward to move the front of
the tire towards or away from the frame.
2. Continue rotating the tie rod until the proper toe-
in seing is achieved.
3. Torque tie-rod clamps to 60-80 ft-lb (81-108 N-m).