Ridewell Suspensions RSS-233 Manual

233-Truck-20K-ISM-RevB-07-06-18 Page 1 ENG
RSS-233 - 20K Truck
Self-Steering Air-Ride Suspension
Installation and Service Manual
Part No.: 9710111
Doc:
233-Truck-20K-ISM-RevB-07-06-18
Suspension Identication..................................... 2
Suspension System Serial Tag
Installation ............................................................. 3
Prior to Installation
Suspension Mounting
Air Controls - Troubleshooting
Maintenance .......................................................... 7
Recommended Service Intervals
Parts Illustration
20K Truck Suspension with Drum Brakes
Drum Brake Axle Assembly
20K Truck Suspension with Disc Brakes
Disc Brake Axle Assembly
20K Roll-O Suspension
Roll-O - Drum Brake Axle Assembly
Bushing Replacement Kit
Bushing Replacement Procedure
Appendix.............................................................. 15
Torque Specications
Warranty............................................................... 16

ENG Page 2 233-Truck-20K-ISM-RevB-07-06-18
Gross Axle WeiGht rAtinG CertifiCAtion is per the finAl stAGe
mAnufACturer or Alterer.
this produCt mAy be Covered under one or more pAtents.
AdditionAl pAtents mAy be pendinG.
for more informAtion on pAtent or suspension/Axle CApACity rAtinG
ContACt rideWell CorporAtion.
www.ridewellcorp.com [phone]
PART NO:
SERIAL NO:
Figure 1. The Suspension Serial Tag is located on
the left-hand (driver’s side) suspension hanger.
SUSPENSION IDENTIFICATION
Introduction
It’s important that the proper suspension model be
chosen for the application in which it is to be used.
The Ridewell Self-Steering (RSS) 233 Suspension
series is a fully integrated, auxiliary axle suspension
system available for truck and trailer applications.
The RSS-233 20K Truck Suspension System can be
congured with drum or disc brake axle assemblies
and with an optional steering lock. The 20K Truck
suspension can also be congured with drum brake
assembliesfor roll-o applications.
Refer to the engineering drawing for detailed infor-
mation on the suspension system components and
operating parameters.
Read through the entire Installation and Service
Manual (ISM) before performing any installation or
maintenance procedures.
Identication Tag
Ridewell suspension systems can be identied by the
Part and Serial Number listed on the serial identica-
tion tags.
Suspension Serial Tag
The Suspension Serial Tag provides information on
the suspension model (Figure 1).
The Part Number (233xxxx) refers to the individual
model of the suspension system.
The nine-digit Serial Number (1xxxxxxxx) refers to
the date and order of manufacture of the suspension.
Please refer to both the part number and serial num-
ber when contacting Ridewell for customer service,
replacement parts and warranty information.
Notes and Cautions
All work should be performed by a properly trained
technician using the proper/special tools and safe
work procedures.
The ISM uses two types of service notes to provide
important safety guidelines, prevent equipment dam-
age and make sure that the suspension system oper-
ates correctly. The service notes are dened as:
“NOTE”: Provides additional instructions or
procedures to complete tasks and make sure that
the suspension functions properly.
Indicates a hazardous situation or
unsafe practice that, if not avoided, could result
in equipment damage and serious injury.
Notes on Self-Steering Option
Self-steering suspensions are designed to steer only
in the forward direction. The suspension should be
raised o the ground or locked into a non-steering
conguration during reverse travel to avoid damag-
ing the suspension.
Ridewell Suspensions strongly recommends the use
of automated systems that raise/lock the lift-axle
during reverse travel. For manual operations, Ride-
well recommends the installation of a visual/audible
indicator to assist the driver.
Use caution when maneuvering in reverse with the
steering lock engaged. The driver should maintain
slow maneuvering speeds and avoid extreme turns.
Failure to lift the suspension and-or engage
the steering-lock during reverse travel can cause
component damage and void the warranty.

233-Truck-20K-ISM-RevB-07-06-18 Page 3 ENG
INSTALLATION
Installer Responsibilities
The installer of the suspension has the sole responsi-
bility for proper aachment of the suspension system
to the vehicle chassis.
• The installer is responsible for locating the sus-
pension system on the vehicle to provide the
proper load distribution.
• The installer must verify that vehicle crossmem-
bers are positioned to support the suspension at
the installing location.
• It is the installer’s responsibility to determine that
axle spacing conforms to any applicable federal
and local bridge laws.
• The installer must verify that air reservoir volume
requirements are met after suspension installa-
tion. Consult the vehicle manufacturer or Federal
Motor Vehicle Safety Standards (FMVSS) 121 for
more information.
• The installer must verify there is sucient clear-
ance for proper functioning of the auxiliary
suspension, air springs, brake chambers, steer-
ing components, axle (including axle to driveline
clearance) and tires.
Prior to Installation
Refer to the engineering drawing to conrm dimen-
sional requirements and the range of ride heights
available.
Installations can vary and procedures should be
adapted for dierent vehicles, as needed.
• The Gross Axle Weight Rating (GAWR) is deter-
mined by the system component with the lowest
load rating. Please consult with tire, wheel, axle
and brake manufacturers before installation to
determine the GAWR.
• If vehicle chassis modications are required, con-
sult with the vehicle manufacturer to ensure that
such changes are permied.
• Welding or altering suspension components
is not permied without the express wrien
permission of Ridewell Suspensions.

ENG Page 4 233-Truck-20K-ISM-RevB-07-06-18
Mounting the suspension to the frame
Refer to the engineering drawing for the range of ride
heights available as well as spacing and clearance
requirements of the suspension.
The RSS-233 20K Truck Suspension is shipped fully
assembled. If the suspension system is taken apart
for installation, the components must be reassembled
with the proper torque applied (Appendix).
Bolt-On Installation Procedure
Suspension hangers are aached to the vehicle frame
with six 5/8-inch Grade 8 bolts in each hanger. Air
spring mounting brackets require two 5/8-inch Grade
8 bolts in each bracket. Flanged lock nuts or lock nuts
with hardened washers are required.
• Hanger locator anges are pre-installed to
match the ride height set by the air spring
mounting plate.
Ride height is adjusted by installing a 1” or 2”
spacer on the air spring mounting plates. The
hanger locator ange is moved up or down on
the hanger to match the height of the air spring
mounting plate and spacer installation.
• A 2” spacer kit for both the hangers and air
spring mounting plates is available for the 233-
20K disc brake and roll-o congurations.
1. Measure the vehicle frame width and the hanger-
to-hanger inside dimensions of the suspension.
Customer-supplied ller plates are required for
the hangers and air spring mounting brackets if
the vehicle frame width is narrower than that of
the suspension.
2. Place the suspension (with hanger and air spring
ller plates and the appropriate spacer(s), if re-
quired) in the desired location.
NOTE: A crossmember must be located on the
frame within six inches of the leading or trailing
edge of the hanger.
3. Check that the location provides adequate clear-
ance for suspension components. Make sure the
top of the hangers and air spring mounting plates
are parallel to the chassis frame to maintain the
proper caster angle.
4. Hangers and air spring mounting plates should
be perpendicular to the chassis frame and in
alignment with each other. Clamp the hangers,
mounting plates, and spacer and ller plates (if
required) rmly in place.
5. Refer to the engineering drawing for the recom-
mended bolt hole locations on the hangers and
air spring mounting plates. If it is not possible to
use the recommended bolt locations, space the
bolt holes as far apart as possible to provide the
greatest support for the suspension.
Check to make sure that wires, hoses or
other components located within the frame rail
are not aected by drilling.
6. Center punch and drill six bolt holes in each
hanger. Bolt the hangers to the frame with the
recommended Grade 8 bolts and lock nuts.
7. Center punch and drill two bolt holes in each
air spring mounting bracket. Bolt the air spring
brackets to the frame with the recommended
Grade 8 bolts and lock nuts.
8. Install/connect the air control kit (ACK) to the
suspension (Page 6). Check the air system after
installation for leaks and proper operation of
controls.
9. Perform nal assembly and inspection and check
the wheel toe seing (Page 5)
Failure to torque bolts/nuts of suspension
components to specications can result in failure of
the suspension and void the warranty.
NOTE:
Air Spring Spacer
must be used
if hanger locator ange
is moved from
factory pre-set
ride height
Hanger Locator Flange-(RH)
Flanged Screw (Self-Tapping) 2” Spacer
(Air Spring)

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).

ENG Page 6 233-Truck-20K-ISM-RevB-07-06-18
Troubleshooting – Air System Installation
Problem Possible Cause Solution
Air springs ll
but do not exhaust.
— Obstructed air line.
— Faulty controls wiring.
— Manual override pushed in
— Check for pinched/blocked lines.
— Check wiring with voltmeter and
correct wiring/installation.
— Release manual override.
Air system leaks
down after a short
period of time.
— Leak in air system beyond
accepted standards. — Pressurize system and spray soap water solution onto the tubing,
valves and fittings. Check for
bubbles (leaks). Note: Some valves
will leak at an acceptable rate.
— Check that tubing cuts are straight
and smooth. Re-cut and reassemble
fitting joints, if necessary.
Auxiliary unit will not
stay up
— Loose Air Fittings.
— Damaged Air Lines.
— Air lines to lift and load air
springs are reversed.
— Damaged or Worn
Air Springs.
— Check and retighten fittings. Repair
or replace component, as necessary.
— Check installation. Air line from
regulator goes to (load) air springs.
— Replace if worn or damaged.
Auxiliary unit not geing
the correct lift
— Air lines to lift and load air
springs are reversed.
— Lift air springs do not have
proper air pressure.
— Interference with driveline or
other chassis components.
— Air control system not
installed correctly.
— Check installation. Air line from
regulator goes to (load) air springs.
— Check for loose fittings or worn/
damaged lines. Verify air tank
pressure with gauge.
— Visually inspect unit operation for
proper clearance. Check for loose
fasteners and retighten.
— Check installation; refer to OEM
installation procedures.
Install air system components
Connect the load and lift air springs and an air con-
trol kit to the air system (Figure 2).
The air control kit (ACK) consists of a pressure
regulator with a gauge connected to an air valve
controlled by an electric switch or manual knob. The
ACK allows the operator to control the air spring
pressure so that the auxiliary axle can support dier-
ent loads.
Ridewell has a number of manual/electric ACK
congurations available. Installation will vary by the
type of conguration.
The installer is responsible for making sure
that air system requirements comply with the appro-
priate Federal Motor Vehicle Safety Standards.
Air Tank
Air Control Kit (ACK)
Quick Exhaust Valve Air Springs
(Load)
Quick
Exhaust Valve
Air Springs
(Lift)
Pressure Regulator
Pressure
Protection Valve (PPV)
(Required with air brakes)
Electric Valve
Figure 2.
Example of Air Control Kit (ACK) installation

233-Truck-20K-ISM-RevB-07-06-18 Page 7 ENG
MAINTENANCE
A visual inspection of the suspension structure should be performed during each pre-trip/safety inspection.
Ridewell Suspensions recommends the following minimum service intervals for standard duty, on-highway
usage applications. More frequent intervals are recommended for heavier duty applications.
Daily/Pre-Trip Inspections
___ Check tires for proper ination, damage or
excessive wear.
___ Check wheel-ends for obvious signs of lubricant
leakage. Check for missing components.
___ Visually inspect suspension structure for signs
of damage or excessive wear.
___ Check for loose or missing bolts/nuts. Check for
irregular movement in suspension components.
___ Make sure air controls are operating properly.
Drain all moisture from air reservoirs.
First 6,000 miles of use
___ Torque all suspension bolts/nuts to specica-
tions (torque values chart in Appendix).
Every 12,000 miles of use
___ Lubricate Brake Cam and Slack Adjuster.
___ Inspect kingpins and upper/lower kingpin
bushings for wear. Grease thrust bearings.
___ Inspect steering damper for damage/wear.
___ Inspect air springs for any damage or
excessive wear. Torque air spring bolts/nuts
to specications (Appendix).
___ Check air system for leaks.
First 50,000 miles of use
___ Torque all suspension bolts/nuts to specica-
tions (Appendix).
___ Check wheel ends for excessive play.
___ Check suspension pivot bushings for wear.
___ Check operation of (reverse) steering lock
(if equipped).
___ Verify operation of manual/automatic lift-in-
reverse control (if equipped).
___ Inspect tie-rod and tie-rod ends for damage and
wear. Lubricate tie-rod ends. Check that the tie-
rod boot is in place and completely over the end
of the tie-rod. Replace entire tie-rod end if boot
is damaged.
Annually/100,000 miles of use
___ Inspect pivot connections for worn pivot
bushings and replace, if necessary. Torque pivot
hardware and component bolts/nuts to speci-
cations (Appendix).
___ Check suspension hanger and air spring mount-
ing plate connections to frame.
___ Check lubrication level in wheel ends:
1) Oil-Filled Wheel Ends: Refill/Replace lubri-
cant as needed (Refer to TMC RP 631 “100K/
Annual Inspection”).
2) Semi-Fluid Grease: Pull outer bearing and vi-
sually inspect lubrication level. Rell/Replace as
needed (Refer to TMC RP 631 “Level 3 Lubrica-
tion Level Inspection” and TMC RP 618 “Wheel
Bearing Adjustment Procedure”).
___ Check air system for leaks.
___ Test air system pressure protection valve
(if equipped).
___ Check brake chambers and brakes for damage
and proper function.
Failure to exhaust all pressure from the
air system before working on the vehicle can cause
serious injury.
Failure to torque bolts/nuts of suspension
components to specications can result in failure of
the suspension and void the warranty.
Refer to the following Technology &
Maintenance Council (TMC) publications
for additional maintenance information.
TMC RP 609 Self-Adjusting and Manual Brake
Adjuster Removal, Installation
and Maintenance
TMC RP 618 Wheel Bearing
Adjustment Procedures
TMC RP 619 Air System Inspection Procedure
TMC RP 622 Wheel Seal and Bearing Removal,
Installation, and Maintenance
TMC RP 631 Recommendations for
Wheel End Lubrication
TMC RP 643 Air Ride Suspension
Maintenance Guidelines
TMC RP 645 Tie Rod End Inspection
and Maintenance Procedure
TMC RP 651 Steer Axle
Maintenance Guidelines

ENG Page 8 233-Truck-20K-ISM-RevB-07-06-18
Figure 3.
RSS-233 20K Truck Suspension – Standard/Wide Frame Width - Drum Brakes
Refer to the engineering drawing for the individual component part number.
Cross Channel
Hanger
(Left-Hand)
Air Spring
(Lift)
Bolt
(Air Spring)
Torque Rod
(LH Upper)
(LH Lower)
Torque Rod
(RH Upper)
(RH Lower)
Lock Nut
(Hanger-LH)
Wear Washer
Hanger
(Right-Hand)
Mounting Bracket
(Air Spring-RH)
Pivot Bolt/Washer/Pivot Nut
(HHCS/FlatWasher/Lock Nut)
Bolt
(Air Spring)
Air
Spring
(Load)
Lock Nut
(Hanger-RH)
Pivot Bushing
Wear Washer
Mounting Plate
(Air Spring-RH)
2” Spacer
(Air Spring-RH shown)
Hanger Locator Flange-(RH shown)
Flanged Screw (Self-Tapping)
Pivot Bolt/Washer/Pivot Nut
(HHCS/FlatWasher/Lock Nut)
Drum Brake Axle Assembly
(Steer Lock)
Pivot Bolt/Washer/Pivot Nut
(HHCS/FlatWasher/Lock Nut)
Flanged Lock Nut
(Air Spring)
Bushing
Inner Sleeve
Flanged Bolt
(Hangers)
Pivot Bolt/Washer/Pivot Nut
(HHCS/FlatWasher/Lock Nut)
Pipe Plug
(Hex Socket)
Lock Nut
Flat Washer
NOTE:
Spacer Kit for
standard drum brake
includes air spring
spacer plates only

233-Truck-20K-ISM-RevB-07-06-18 Page 9 ENG
Figure 4.
RSS-233 - 20K Truck Suspension
With Drum Brakes-
Drum Brake Axle Assembly
(Steer Lock version)
Refer to the Steer Lock (S) version
of the engineering drawing for the
individual component part number.
Cotter Pin Castle Nut
Lock Nut
Bolt Hub Cap
Tie Rod
Washers
Steer Lock Stop Plate
Gasket Spindle Nut Bearing Assembly (Outer)
Bearing Bearing Assembly Seal (Inner)
Bolt
Steer Lock Brake Plunger Chamber
Cap
Gasket
King Pin
Shims
Lock Nut
Steer Lock Tube Assembly
Hub & Drum
(Options Avail.)
Brake Assembly (LH)
Draw Key
Lock Nut
Bolt Cotter Pin Lock Nut Tie Rod Arm
Hub & Drum
(Options Avail.)
Steering
Damper
Bolt
Bolt
Flat Washer
Gasket Cap
Grease Fitting Knuckle
(LH)
Lock Nut
Bolt
Cotter Pin
Lock Nut
Tie Rod Arm
Grease Fitting Knuckle
(RH)
Bearing Seal
Thrust Bearing
Woodru Key
Flat Washer Bolt
Lock
Pin
Brake
Assembly
(RH)

ENG Page 10 233-Truck-20K-ISM-RevB-07-06-18
Figure 5.
RSS-233 20K Truck Suspension – Disc Brakes
Refer to the engineering drawing for the individual component part number.
Cross Channel
Hanger
(Left-Hand)
Air Spring
(Lift)
Bolt
(Air Spring)
NOTE:
ADB Spacer Kit
includes both hanger
and air spring spacer plates
Torque Rod
(LH Upper)
(LH Lower)
Torque Rod
(RH Upper)
(RH Lower)
Lock Nut
(Hanger-LH)
Wear Washer
Hanger
(Right-Hand)
Mounting Bracket
(Air Spring-RH)
Pivot Bolt/Washer/Pivot Nut
(HHCS/FlatWasher/Lock Nut)
Lock Nut
(Hanger-RH)
Pivot Bushing
Wear
Washer
Mounting Plate
(Air Spring-RH)
2” Spacer-Air Spring
(Optional)
Pivot Bolt/Washer/Pivot Nut
(HHCS/FlatWasher/Lock Nut)
Disc Brake Axle Assembly
(Steer Lock)
Pivot Bolt/Washer/Pivot Nut
(HHCS/FlatWasher/Lock Nut)
Flanged Lock Nuts
(Air Spring)
Bushing
Inner Sleeve
Flanged Bolt
(Hangers)
Pivot Bolt/Washer/Pivot Nut
(HHCS/FlatWasher/Lock Nut)
Pipe Plug
(Hex Socket)
Lock Nut
Flat Washer
2” Spacer - Hanger
(Optional)
Air
Spring
(Load)
Bolt
(Air Spring)
Bolt
(Air Spring)

233-Truck-20K-ISM-RevB-07-06-18 Page 11 ENG
Cotter Pin Castle Nut
Grease Fitting Knuckle
(RH)
Lock Nut
Bolt Flat Washer Hub Cap
Tie Rod
Flat Washer Steer Lock Stop Plate
Gasket Spindle Nut Bearing Assembly (Outer)
Torque Plate (LH)
Brake Cam
Brake Caliper
(LH)
Bearing Bearing Assembly Seal (Inner)
Bolt
Steer Lock Brake Plunger Chamber
Cap
Cap Gasket
King Pin
Shims
Lock Nut
Steer Lock Tube Assembly
Hub & Rotor
Bolt
Draw Key
Lock Nut
Bolt Tie Rod Arm Cotter Pin Lock Nut
Knuckle (LH)
Hub & Rotor
Brake Cam Brake Caliper Torque Plate (RH)
Bolt
Tie Rod Arm
Cotter Pin Steering
Dampers
Bolt
Bolt
Flat Washer
Bolt
Flat Washer
Bolt
Flat Washer
Bearing Seal
Thrust Bearing
Cap
Cap Gasket
Lock Nut Lock Pin
Woodru Key
Figure 6.
RSS-233-20K Truck Suspension
With Disc Brakes-
Disc Brake Axle Assembly
(Steer Lock version)
Refer to the Steer Lock (S) version of the
engineering drawing for the individual
component part number.

ENG Page 12 233-Truck-20K-ISM-RevB-07-06-18
Figure 7.
RSS-233 - 20K Truck - Roll-O suspension – Drum Brakes
Refer to the engineering drawing for the individual component part number.
Cross Channel
Hanger
(Left-Hand)
Air Spring
(Lift)
Bolt
(Air Spring)
NOTE:
Roll-O Spacer Kit
includes both hanger
and air spring spacer plates
Torque Rod
(LH Upper)
(LH Lower)
Torque Rod
(RH Upper)
(RH Lower)
Lock Nut
(Hanger-LH)
Wear Washer
Hanger
(Right-Hand)
Mounting Bracket
(Air Spring-RH)
Pivot Bolt/Washer/Pivot Nut
(HHCS/FlatWasher/Lock Nut)
Lock Nut
(Hanger-RH)
Pivot Bushing
Wear Washer
Mounting Plate
(Air Spring-RH)
2” Spacer-Air Spring
(Optional)
Pivot Bolt/Washer/Pivot Nut
(HHCS/FlatWasher/Lock Nut)
Drum Brake Axle Assembly
Pivot Bolt/Washer/Pivot Nut
(HHCS/FlatWasher/Lock Nut)
Flanged Lock Nuts
(Air Spring)
Bushing
Inner Sleeve
Flanged Bolt
(Hangers)
Pivot Bolt/Washer/Pivot Nut
(HHCS/FlatWasher/Lock Nut)
Pipe Plug
(Hex Socket)
Lock Nut
Flat Washer
2” Spacer - Hanger
(Optional)
Air
Spring
(Load)
Bolt
(Air Spring)
Bolt
(Air Spring)

233-Truck-20K-ISM-RevB-07-06-18 Page 13 ENG
Figure 8.
RSS-233 - 20K Truck - Roll-O
Drum Brake Axle Assembly
Refer to the engineering drawing for
the individual component part number.
Cotter Pin Castle Nut
Bolt Hub Cap
Tie Rod
Lock Nut
Gasket Spindle Nut Bearing Assembly (Outer)
Bearing Bearing Assembly Seal (Inner)
Bolt
Cap
Gasket
King Pin
Shims
Hub & Drum
Brake Assembly (LH)
Draw Key
Lock Nut
Bolt Cotter Pin Lock Nut Tie Rod Arm
Hub & Drum
Bolt
Flat Washer
Gasket Cap
Grease Fitting Knuckle
(LH)
Lock Nut
Bolt
Cotter Pin
Lock Nut
Tie Rod Arm
Grease Fitting Knuckle
(RH)
Bearing Seal
Thrust Bearing
Woodru Key
Flat Washer Bolt
Lock
Nut
Lock Pin
Brake
Assembly
(RH)
Steering
Dampers
Lock Nut
Bolt

ENG Page 14 233-Truck-20K-ISM-RevB-07-06-18
4x 4x
4x 4x
2x 2x
2x 2x
3x 3x
3x 3x
LH
LH
LH
LH
RH
RH
RH
RH
Standard - 33.5” Wide Frame - 34.5”
RSS-233 20K Truck Suspension - Standard/Wide Frame Width
Axle-End Torque Rod Assembly
4.8” Inner Sleeve - Wear Washer Installation
Upper and Lower Torque Rod Upper and Lower Torque Rod
Upper and Lower Torque Rod Upper and Lower Torque Rod
Standard - 34.5” Wide Frame - 35.5”
Standard - 34” Wide Frame - 35” Standard - 35” Wide Frame - 36”
RSS-233 - 20K Truck Suspension – Bushing Replacement Kit
Suspension Type
Bushing Replacement
Kit - Part Number Pivot Hardware
Torque Values
foot-pound Newton-meter
All models 6040142 Bushing kit - No pivot bolt 500 ft-lb 678 N-m
All models 6040145 Pivot Bolt (HHCS)
Pivot Nut (Lock Nut) 500 ft-lb 678 N-m
Failure to install and maintain fasteners at torque specifications could result in suspension failure and
voiding of the warranty. Refer to the engineering drawing for torque specifications.
Park the vehicle on a level surface. Chock wheels to keep vehicle from moving. Exhaust all air from the air
system. Disassemble suspension, if necessary, to reach pivot connections.
Failure to properly chock wheels and exhaust the air system could allow vehicle movement that could
result in serious injury.
1. Count the number of wear washers on each side of
the bushing on the Axle-End Torque Rod Assembly.
The wear washer number varies according to the
frame width set by the hangers (Figure 1).
2. Remove the pivot hardware and discard. Inspect the
wear washers for excessive wear/damage. Replace, if
necessary.
NOTE: Pivot hardware included with bushing re-
placement kit.
3. Remove bushing assembly from torque rod and
discard. Clean the rod eye of any foreign debris/
corrosion.
4. Apply Energy Suspensions®Formula 5 Prelube to
the bore (inside) of new bushings. NOTE: Do not
Bushing Replacement Procedure – Standard/Wide Frame Width
Figure 9. The number of wear washers on each side of the pivot con-
nection (axle-end) can vary according to the frame width. Refer to
the engineering drawing for correct number of wear washers.
substitute - special urethane bushing lubricant
included with all bushing kits.
5. Install new bushing into the eye of the torque rod.
NOTE: Mallet /press may be needed to install the
bushing.
6. Hanger-End Torque Rod -
Bushing Inner Sleeve - 4.1”
Press inner sleeve into the installed bushing. Cen-
ter the sleeve so that both ends extend slightly
past the sides of the bushing. Assemble the pivot
connection with one wear washer on each side of
the bushing. Inner sleeve must be ush with or
extend slightly past the outside of the wear wash-
ers on both ends.
7. Axle-End Torque Rod-
Bushing Inner Sleeve - 4.8”
Press inner sleeve into the installed
bushing. Position the inner sleeve
so that one end extends further
past the bushing than the other
end (Figure 1).
Assemble pivot connection with
appropriate number of wear
washers on either end of the inner
sleeve. Inner sleeve must be ush
with or slightly past the outside of
the wear washers on both ends.
8. Torque pivot nut to specications
(500 ft-lb - 678 N-m).
9. Reassemble suspension, if nec-
essary. Torque components to
specications.
10. Check wheel toe-in seing (be-
tween 1/32” and 3/32”) and adjust,
if necessary.

233-Truck-20K-ISM-RevB-07-06-18 Page 15 ENG
APPENDIX
RSS-233 20K Truck – Torque Specications
Fastener Type Size
Torque Specications
foot-pound Newton-meter
Lock Nut - (Air Spring) 1/2”-13NC 25 ft-lb 34 N-m
Lock Nut - (Air Spring) 1/2”-20NF 25 ft-lb 34 N-m
Lock Nut - (Air Spring) 3/4”-16NF 50 ft-lb 68 N-m
Flanged Lock-Screw - (Air Spring) 3/8”-16NC 25 ft-lb 34 N-m
Lock Nut - (Tie Rod/Steering Damper) 3/4”-10NC 160 ft-lb 217 N-m
Lock Nut - (Cross Channel) 5/8”-11NC 160 ft-lb 217 N-m
Pivot Bolt - (Hex Head Cap Screw (HHCS))
Pivot Nut - (Lock Nut) 7/8”-14NF 500 ft-lb 678 N-m
Torque values reflect a lubricated thread condition (Nuts are pre-lubed). Do not overtorque.
Suspension is shipped with minimal torque applied to fasteners. It is the installer’s responsibility
to apply the proper torque values. All fasteners MUST be re-torqued after the first 6,000 miles of operation.
Failure to install and maintain fasteners at torque specifications could result in suspension failure and voiding
of the warranty. Refer to the engineering drawing for torque specifications of the suspension model.

ENG Page 16 233-Truck-20K-ISM-RevB-07-06-18
WARRANTY
Terms and coverage in this warranty apply only to the United States and Canada.
Ridewell Suspensions warrants the suspension systems manufactured by it to be free of defects in mate-
rial and workmanship. Warranty coverage applies only to suspensions that have been properly installed,
maintained and operated within the rated capacity and recommended application of the suspension. The
responsibility for warranty coverage is limited to the repair/replacement of suspension parts. The liability
for coverage of purchased components is limited to the original warranty coverage extended by the manu-
facturer of the purchased part.
All work under warranty must have prior wrien approval from the Ridewell warranty department. Ride-
well has the sole discretion and authority to approve or deny a claim and authorize the repair or replace-
ment of suspension parts. All parts must be held until the warranty claim is closed.
Parts that need to be returned for warranty evaluation will be issued a Returned Materials Authorization
(RMA). Parts must be returned to Ridewell with the transportation charges prepaid. The transportation
charges will be reimbursed if the warranty claim is approved.
This non-transferable warranty is in lieu of all other expressed or implied warranties or representations,
including any implied warranties of merchantability or tness or any obligations on the part of Ridewell.
Ridewell will not be liable for any business interruptions, loss of profits, personal injury, any costs of
travel delays or for any other special, indirect, incidental or consequential losses, costs or damages.
Contact the Ridewell Warranty Dept. at 417.833.4565 - Ext. 135, for complete warranty information.