PB-0226Revised 3-03

Trailer AirSuspensionSystems

Models RFS23T & RFS25T

Suspension Identification PageModel Nomenclature.............................................................................................. 3

Trailing Arm/Axle Service Beam…………………………………………………………3

Parts of Suspension/Terminology.......................................................................... 4, 5

Repair Kits and ComponentsAir Springs.............................................................................................................. 10

Air Spring Bolt Kit................................................................................................... 10

Shock Absorber......................................................................................................10

Shock Absorber Bolt Kit......................................................................................... 10

Pivot Bolt & Bushing Kits........................................................................................10, 11

Pivot Bolt Kits......................................................................................................... 11

Valve Kits............................................................................................................... 11

Parts ListRFS23T Exploded View......................................................................................... 6

Model RFS23T Parts List....................................................................................... 7

RFS25T Exploded View......................................................................................... 8

Model RFS25T Parts List....................................................................................... 9

This catalog contains information that is unique to the RideStar "RFS" SeriesTrailer Air Suspension Systems. Use the illustrations on Page 6 & 8 to help determinethe name of the item to be ordered.

Table of Contents

1

In 1997, Meritor® created the industry's firstsuspension system specifically designed forsliding tandem van applications, our revolutionaryRHP Series Suspension System. Now we'vebrought a new level of ride quality, stabilityand durable performance to the rest of thetrailer market.

Introducing the new air suspension standardfor specialized vocational markets, Meritor'sRideStar FS Series Suspension.

When we first introduced the RHP Series, we to completely rethink all the elements of thewere confident that it would perfectly meet the system, and that opened the door to a host ofdemands of the sliding tandem van market - performance and durability improvements. The new RideStar FS Series Suspensionand the years since that introduction have The results speak for themselves. delivers the legendary performance of theshown that confidence was well-founded. But, Meritor RHP Series to the non-van market. Thewe also knew that the specialized vocational system is friendly to driver, load and road. Itsmarket had its own set of unique needs that Given the RHP Series' reputation for eliminating low maintenance design and enhanced perfor-required a different approach. We looked for a backslap and its unrivaled control of induced mance also will keep fleet managers smiling.way to provide the ride quality, superior steer, we knew that the FS Series would Because the FS Series keeps trailer tires instability and low-maintenance, light-weight have to live up to high expectations. Integrating contact with the road better than any competitiveadvantages of the RHP Series in a design the advancements in system design and system, tire wear is reduced, braking and controlthat would work for flatbeds, tankers and shock technology with a revolutionary new are improved, and axle vibration is kept to a other non-van trailers. bushing, the RideStar FS Series Suspension minimum.

stays true to the heritage of the RHP Series.Our work on the RHP Series taught us that Our patent-pending design uses interleaf FS Series Suspensions include the industry-breakthrough concepts don't come from routine shims for superior fore/aft stiffness versus leading lineup of Meritor axles and brakes.processes. So, from the start, we knew that other single bushing designs, while the They also are compatible with a full line ofthe only way to deliver the wholesale improve- bushing's narrow profile saves on total ArvinMeritor products - automatic slack adjusters,ments we were looking for was to address the suspension system weight and bulk.problem from a full systems viewpoint. hubs and drums, Q Plus™ brakes, Meritor

WABCO ABS and the Meritor Tire InflationGiven the inherent advantages of the new System by P.S.I. Gain additional low mainte-design, ArvinMeritor engineers realized that nance benefits with LX500 Extended Lube

We studied the needs of the specialized they could now fully utilize the shock-absorber brakes and the TB Unitized Hub trailer axle.vocational market to determine how to provide technology developed by Gabriel. Borrowingexceptional suspension dynamics, to create a from European design, the shock absorbers With our new RideStar FS Series Suspensions,robust, low-maintenance system. Our goal was used on the FS Series have been specially the legendary Meritor performance is availableto deliver better ride and handling, to protect developed to work with the suspension for your specialized vocational applications.the goods you carry. And we wanted a geometry to deliver a new standard in ridesuspension system that would deliver benefits quality. Exceptional damping characteristicsto your bottom line - for years to come. and an innovative integral check strap lead toOur engineers were given the freedom years of low-maintenance dependability.

2

Model NomenclatureRideStar Descriptive Model NumberEach suspension model number will be distinct and unique. This number will consist of 14 charactersand can be found on the suspension identification tag located on the rear of the roadside trailing arm.

The model nomenclature is defined as follows:

RFS 23 E T 14 L XXXXSequential Bill of Material Number

BrakesQ = Q BrakesL = Q+ Brakes

Suspension's Designed Ride Height Example: 14 = 14" Ride Height

Suspension Profile T = High Ride Height Model

RideStar Fabricated E = US StandardM = Metric

Suspension Capacity Example: 23 = 23,000 Pounds

Trailing Arm/Axle Service BeamRFS Series Trailing Arm/Axle Subassembly NumberIn the unlikely event that a replacement Trailing Arm/Axle Subassembly is required, the service beam to matchyour exact suspension must be determined. As defined above, each RFS Series air suspension model numberwill be distinct and unique. This same model number is used to determine the correct service beam assembly.

Locate the I.D. tag at the rear of the roadside trailing arm and you will find the suspension model number. Thissame model number is used to determine the service beam number that is required. The last four digits of thedescriptive model number represent the sequential bill of material number for your suspension. By applyingthese four digits to the following numbering system assures that you have defined the suspension series,that it is a service beam, and that it meets the needs for your suspension.

The service beam nomenclature is defined as follows:

RFS 23 T XXXXSequential Bill of Material Number

RideStar Fabricated Service Beam

Suspension Profile T = High Ride Height Model

Suspension Capacity Example: 23 = 23,000 Pounds

Suspension

SB

Suspension

3

Parts of Suspension

anger Terminology

Standard Terminology H

anger: Sometimes referred to as frame brackets, towers, or pivot brackets. Load carrying structure that

eld-on Hanger: A hanger that welds to a steel trailer frame.

olt-On Hanger: A hanger assembly with holes in the top plate that allows for bolting to an aluminum trailer

ir Spring Terminology

Hinterfaces with the trailer frame and attaches to the trailing arm assembly at the pivot connection. W Bframe. A

ir Spring: Sometimes referred to as an air bag, air cell, balloon, or spring. It is an inflatable bag designed to

lexmember: The inflatable rubber portion of the air spring.

iston: The bottom portion of the air spring which is used to attach the air spring to the trailing arm.

ead Plate: Top mounting surface of the air spring that is attached to the flexmember.

Ahold a volume of air. The air spring supports the trailer and its imposed load with air pressure. F P B

4

5

Suspension Parts of Standard Terminology Trailing Arm/Axle Terminology Trailing Arm: Sometimes referred to as Equalizing Beam, Beam, or Pontoon. The Trailing Arm is a load carrying structure that interfaces at the pivot connection, connects to the axle tube, and supports the air spring. Axle Track: The side-to-side distance from the center of the dual tires on roadside to the center of dual tires on the curbside. Trailing Arm Centers: The side-to-side distance from the center of the roadside trailing arm to the center of the curbside trailing arm. Trailing Arm/Axle Subassembly: An integrated axle and trailing arm assembly, whereas the axle and trailing arms are of one piece. Shock Absorber Terminology Shock Absorber: Sometimes referred to as dampers. The shock absorbers damp excessive axle vibration and protect the air springs from over-extending at full rebound position. Integral Check Strap: A hydraulic cushion as the shock absorber approaches the fully extended position to aid in shock absorber durability and to eliminate the need for external restraint devices such as cables or nylon straps. Glossary of Terms Trailer Frame: Commonly referred to as the trailer subframe, trailer beam, “C”- channel frame, or “I”-beam frame. The Trailer Frame is the structure that the air suspension mounts to. Ride Height: The ride height of the suspension is determined from the centerline of the axle to the underside of the trailer frame. Jounce: Amount of axle upward travel from the designed ride height position. Rebound: Amount of downward axle travel from the designed ride height position. Multi-Functional Pivot Bushing: Rubber bushing that is located at the pivot connection end of the trailing arms. Pivot Connection: Sometimes referred to as the pivot bolt. This is the connection that attaches the trailing arm to the hanger with the pivot bolt and the location where axle alignment adjustment is made. Axle Connection: The interface where the trailing arms are rigidly connected to the axle beam. Axle: The “RFS” air suspension is integrated with ArvinMeritor axles and brakes. Parts book for Brake, Trailer Axle and Wheel Attaching Parts (PB-8857). Eccentric Alignment Collar: This collar is located toward the outside of the vehicle and has the pivot bolt hole not located at the geometric center. When rotated within the alignment blocks located on the outside of each hanger, it forces the pivot bolt to move fore and aft for axle alignment. Concentric Alignment Collar: This collar is located toward the center of the vehicle and has the pivot bolt hole located at the geometric center.

Exploded View for RFS23T

refer to Maintenance Manual 14F.

For service and maintenance information,

6

Parts List for RFS23T Model

Key * Part Number Qty. Comments1 Air Spring 21227742 22 Air Spring Pedestal (Std. Ride Heights)

14" Ride Height 21227629 215" Ride Height 21227667 216" Ride Height 21227668 217" Ride Height 21227630 214" Ride Height (Bolt-On 9/16" Dia. Holes) 3305-M-1651 215" Ride Height (Bolt-On 9/16" Dia. Holes) A-3150-V-2674 216" Ride Height (Bolt-On 9/16" Dia. Holes) A-3150-W-2675 217" Ride Height (Bolt-On 9/16" Dia. Holes) A-3150-X-2676 2

3 Shock Absorber 87015 24 Eccentric Alignment Collar 21226276 25 Concentric Alignment Collar 21226275 26 Wear Washer 21226663 47 Pivot Bolt and Bushing Kit KIT 11201 28 Pivot Bolt Kit KIT 11202 29 Shock Absorber Bolt Kit KIT 11200 2

10 Air Spring Bolt Kit KIT 11203 211 Trailing Arm/Axle Subassembly --- 1 Contact ArvinMeritor for assistance.12 Roadside Hanger (Standard Models) Contact ArvinMeritor for assistance.

14" Ride Height (Weld-On) A-3152-N-1158 115" Ride Height (Weld-On) A1-3152-N-1158 116" Ride Height (Weld-On) A2-3152-N-1158 117" Ride Height (Weld-On) A3-3152-N-1158 114" Ride Height (Bolt-On 9/16" Dia. Holes) A-3152-Y-1169 115" Ride Height (Bolt-On 9/16" Dia. Holes) A1-3152-Y-1169 116" Ride Height (Bolt-On 9/16" Dia. Holes) A2-3152-Y-1169 117" Ride Height (Bolt-On 9/16" Dia. Holes) A3-3152-Y-1169 114" Ride Height (Bolt-On 11/16" Dia. Holes) A-3152-K-1155 115" Ride Height (Bolt-On 11/16" Dia. Holes) A1-3152-K-1155 116" Ride Height (Bolt-On 11/16" Dia. Holes) A2-3152-K-1155 117" Ride Height (Bolt-On 11/16" Dia. Holes) A3-3152-K-1155 1

13 Curbside Hanger (Standard Models) Contact ArvinMeritor for assistance.14" Ride Height (Weld-On) A-3152-P-1160 115" Ride Height (Weld-On) A1-3152-P-1160 116" Ride Height (Weld-On) A2-3152-P-1160 117" Ride Height (Weld-On) A3-3152-P-1160 114" Ride Height (Bolt-On 9/16" Dia. Holes) A-3152-X-1168 115" Ride Height (Bolt-On 9/16" Dia. Holes) A1-3152-X-1168 116" Ride Height (Bolt-On 9/16" Dia. Holes) A2-3152-X-1168 117" Ride Height (Bolt-On 9/16" Dia. Holes) A3-3152-X-1168 114" Ride Height (Bolt-On 11/16" Dia. Holes) A-3152-J-1154 115" Ride Height (Bolt-On 11/16" Dia. Holes) A1-3152-J-1154 116" Ride Height (Bolt-On 11/16" Dia. Holes) A2-3152-J-1154 117" Ride Height (Bolt-On 11/16" Dia. Holes) A3-3152-J-1154 1

14 Valve AssembliesWith Auto Dump -7806-Z-1014 1Without Auto Dump

15 Linkage Assembly

Description

AA-7806-Y-1013 1M306538 1

7

Exploded View for RFS25T

8

Parts List for RFS25T Model

Key * Part Number Qty. Comments1 Air Spring 21227892 22 Air Spring Pedestal (Std. Ride Heights)

14" Ride Height 21227629 215" Ride Height 21227667 216" Ride Height 21227668 217" Ride Height 21227630 214" Ride Height (Bolt-On 9/16" Dia. Holes) 3305-M-1651 215" Ride Height (Bolt-On 9/16" Dia. Holes) A-3150-V-2674 216" Ride Height (Bolt-On 9/16" Dia. Holes) A-3150-W-2675 217" Ride Height (Bolt-On 9/16" Dia. Holes) A-3150-X-2676 2

3 Shock Absorber 87015 24 Eccentric Alignment Collar 21226276 25 Concentric Alignment Collar 21226275 26 Wear Washer 21226663 47 Pivot Bolt and Bushing Kit KIT 11205 28 Pivot Bolt Kit KIT 11204 29 Shock Absorber Bolt Kit KIT 11200 2

10 Air Spring Bolt Kit KIT 11203 211 Trailing Arm/Axle Subassembly --- 1 Contact ArvinMeritor for assistance.12 Roadside Hanger (Standard Models) Contact ArvinMeritor for assistance.

14" Ride Height (Weld-On) A-3152-T-1164 115" Ride Height (Weld-On) A1-3152-T-1164 116" Ride Height (Weld-On) A2-3152-T-1164 117" Ride Height (Weld-On) A3-3152-T-1164 114" Ride Height (Bolt-On 9/16" Dia. Holes) A-3152-V-1166 115" Ride Height (Bolt-On 9/16" Dia. Holes) A1-3152-V-1166 116" Ride Height (Bolt-On 9/16" Dia. Holes) A2-3152-V-1166 117" Ride Height (Bolt-On 9/16" Dia. Holes) A3-3152-V-1166 114" Ride Height (Bolt-On 11/16" Dia. Holes) A-3152-R-1162 115" Ride Height (Bolt-On 11/16" Dia. Holes) A1-3152-R-1162 116" Ride Height (Bolt-On 11/16" Dia. Holes) A2-3152-R-1162 117" Ride Height (Bolt-On 11/16" Dia. Holes) A3-3152-R-1162 1

13 Curbside Hanger (Standard Models) Contact ArvinMeritor for assistance.14" Ride Height (Weld-On) A-3152-U-1165 115" Ride Height (Weld-On) A1-3152-U-1165 116" Ride Height (Weld-On) A2-3152-U-1165 117" Ride Height (Weld-On) A3-3152-U-1165 114" Ride Height (Bolt-On 9/16" Dia. Holes) A-3152-W-1167 115" Ride Height (Bolt-On 9/16" Dia. Holes) A1-3152-W-1167 116" Ride Height (Bolt-On 9/16" Dia. Holes) A2-3152-W-1167 117" Ride Height (Bolt-On 9/16" Dia. Holes) A3-3152-W-1167 114" Ride Height (Bolt-On 11/16" Dia. Holes) A-3152-S-1163 115" Ride Height (Bolt-On 11/16" Dia. Holes) A1-3152-S-1163 116" Ride Height (Bolt-On 11/16" Dia. Holes) A2-3152-S-1163 117" Ride Height (Bolt-On 11/16" Dia. Holes) A3-3152-S-1163 1

14 Valve AssembliesWith Auto Dump A-7806-Z-1014 1Without Auto Dump A-7806-Y-1013 1

15 Linkage Assembly M306538 1

Description

9

Repair Kits and Componentsr Spring (RFS23T & RFS25T) - Key 1

RFS23TRFS25T

T 11203 Air Spring Bolt Kit (RFS23T & RFS25T) - Key 10Qty. Part Number

1 2 M301553 Lock Nut - 3/4"-16, Grade C2 2 M301554 Lock Nut - 1/2"-13, Grade C3 1 1250-H-1308 Plug - 1/4" NPT

bsorber (RFS23T & RFS25T) - Key 3

T 11200 Shock Absorber Bolt Kit (RFS23T & RFS25T) - Key 9Qty. Part Number

1 2 21226946 Capscrew 7/8"-9 x 11", Grade 82 4 M301530 Hardened Flat Washer - 7/8" ID3 2 M301559 Lock Nut - 7/8"-9, Grade C

T 11201 Pivot Bolt and Bushing Kit (RFS23T) - Key 7Qty. Part Number

1 1 21226945 Capscrew 7/8"-9 x 7.5", Grade 82 1 M301530 Hardened Flat Washer - 7/8" ID3 1 M301559 Lock Nut - 7/8"-9, Grade C4 2 21226663 Wear Washer5 1 21226997 Multi-Function Bushing6 1 21227819 Bushing Insert

numbers refer to corresponding numbers on parts list on page 7 & 9.

Part Number

21227742

Part Number

87015

21227892

Description

Description

Description

Description

10

Ai

KIItem

Shock A

KIItem

KIItem

Key

Repair Kits and ComponentsKIT 11205 Pivot Bolt and Bushing Kit (RFS25T) - Key 7

Item Qty. Part Number1 1 21227932 Capscrew 7/8"-9 x 8.5", Grade 82 1 M301530 Hardened Flat Washer - 7/8" ID3 1 M301559 Lock Nut - 7/8"-9, Grade C4 2 21226663 Wear Washer5 1 21227380 Multi-Function Bushing6 1 21227819 Bushing Insert

KIT 11202 Pivot Bolt Kit (RFS23T) - Key 8Item Qty. Part Number

1 1 21226945 Capscrew 7/8"-9 x 7.5", Grade 82 1 M301530 Hardened Flat Washer - 7/8" ID3 1 M301559 Lock Nut - 7/8"-9, Grade C4 1 21227819 Bushing Insert

KIT 11204 Pivot Bolt Kit (RFS25T) - Key 8Item Qty. Part Number

1 1 21227932 Capscrew 7/8"-9 x 8.5", Grade 82 1 M301530 Hardened Flat Washer - 7/8" ID3 1 M301559 Lock Nut - 7/8"-9, Grade C4 1 21227819 Bushing Insert

KIT 11206 Valve Kit With Auto Dump (RFS23T & RFS25T) - Key 14Item Qty. Part Number

1 1 A-7806-Z-1014 Height Control Valve2 1 M306538 Linkage Assembly

KIT 11207 Valve Kit Without Auto Dump (RFS23T & RFS25T) - Key 14Item Qty. Part Number

1 1 A-7806-Y-1013 Height Control Valve2 1 M306538 Linkage Assembly

Key numbers refer to corresponding numbers on parts list on page 7 & 9.

Description

Description

Description

Description

Description

11

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e warrant all new parts for one year from date of shipment to the buyer against defective material or orkmanship (but not against damage caused by accident, abuse or improper installation, maintenance repair) when such parts are used on vehicles the specifications of which have been approved by our

Engineering Department.

the exclusive remedy under this warranty, we will, at our option, repair or replace such parts free of harge, or take back the nonconforming parts and refund the monies paid by buyer for such parts, ifound on examination by us to be nonconforming and if any necessary return charges are prepaid.

it is necessary to return any parts under this warranty, buyer agrees not to make any deduction on count thereof from remittances on current accounts while claims are in the process of disposition.

Any expense incurred without our consent for repairs or replacement will not be allowed.

HIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES OR CONDITIONS, EXPRESS, IMPLIED OR STATUTORY, INCLUDING ANY IMPLIED WARRANTY OF

ERCHANTABILITY OR FITNESS FOR PARTICULAR PURPOSE. IN NO EVENT SHALL SELLER BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY NATURE.

nly genuine ArvinMeritor replacement parts are covered by this aftermarket parts warranty.

Information contained in this publication was in effect at the time the publication was approvedfor printing and is subject to change without notice or liability. ArvinMeritor reserves the right torevise the information presented or discontinue the production of parts at any time.

mercial Vehicle Aftermarket

ritor Heavy Vehicle Systems, LLC7975 Dixie Highway

orence, KY 41042 USA888-725-9355 © Copyright 2003 Revised 3/2003

arvinmeritor.com ArvinMeritor, Inc. Printed in U.S.A. PB-0226

ARVINMERITOR AFTERMARKET PARTS WARRANTY