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Hendrickson AR2 series Service Instructions Manual

Air over walking beam truck suspension
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TABLE OF CONTENTS

Section 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Section 2
Section 3
Section 4
Section 5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
AR2 Plumbing Diagram . . . . . . . . . . . . . . . . 14
Section 6
Inspection Intervals . . . . . . . . . . . . . . . . 15
Component Inspection . . . . . . . . . . . . . . . . 15
Beam End Axle Brackets . . . . . . . . . . . . . . . 16
Bar Pin End Bushing . . . . . . . . . . . . . . . . . . 21
Bar Pin Shims . . . . . . . . . . . . . . . . . . . . . . . 21
Rubber Center Bushing . . . . . . . . . . . . . . . . 21
Saddle Connection . . . . . . . . . . . . . . . . . . . 23
Cross Tube . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Shock Absorber . . . . . . . . . . . . . . . . . . . . . . 25
Air Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Axle Stops . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Section 7
Ride Height . . . . . . . . . . . . . . . . . . . . . . . . . 27
Axle Pinion Angle . . . . . . . . . . . . . . . . . . . . 29
Drive Axle Alignment . . . . . . . . . . . . . . . . . . 30
Lateral Alignment . . . . . . . . . . . . . . . . . . . . 31
Bar Pin with shims Alignment . . . . . . . . . . . 32
. . . . . . . . . . . . . . . . . . . 3
. . . . . . . . . . . . . . . 5
. . . . . . . . . . . . . . . . . . . . . . . . . 10
AR2
Air Over Walking Beam
™
Suspension
SUBJECT: Service Instructions
LIT NO: 17730-241
DATE: July 2018
Section 8
Fasteners . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Frame Hanger . . . . . . . . . . . . . . . . . . . . . . . 35
Trailing Arm . . . . . . . . . . . . . . . . . . . . . . . . . 36
Trailing Arm Bushing . . . . . . . . . . . . . . . . . . 38
Air Spring . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Shock Absorber . . . . . . . . . . . . . . . . . . . . . . 42
Height Control Valve . . . . . . . . . . . . . . . . . . 42
Equalizing Beam . . . . . . . . . . . . . . . . . . . . . 44
Center Bushing . . . . . . . . . . . . . . . . . . . . . 49
Bar Pin End Bushings . . . . . . . . . . . . . . . . . 51
Adapter Style End Bushing . . . . . . . . . . . . . . 54
Longitudinal Torque Rods . . . . . . . . . . . . . . . 56
Transverse Torque Rods . . . . . . . . . . . . . . . . 57
Torque Rod Bushings . . . . . . . . . . . . . . . 58
XTRB Torque Rod Bushings . . . . . . . . . . . . . . 61
Cross Tube . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Section 9
REVISION: A
. . . . . . . . . 64
. . . . . . . . . . . . . . . . . 71
. . . . . . . . . . . . . . . . . .

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  • Page 1: Table Of Contents

    Equalizing Beam . . . . . . . . . . . . . . . . . . . . . 44 Hendrickson Recommended Inspection Intervals .

  • Page 2: Introduction

    Hendrickson reserves the right to make changes and improvements to its products and publications at any time . Contact Hendrickson Tech Services for information on the latest version of this manual at 1-866-755-5968 (toll-free U .S . and Canada), 1-630-910-2800 (outside U .S . and Canada) or e-mail: techservices@hendrickson-intl .com .

  • Page 3: Product Description

    Large volume air springs — Rolling lobe design provides variable spring rates to deliver ■ superior ride quality Equalizing beam — AR2 is compatible with 40K • 46K capacity Hendrickson RT•RTE walking ■ beams . If required, rigid forged beams or robust lightweight fabricated beams are available separately Heavy-duty shock absorbers —...
  • Page 4 NOTE: Any comparison to other suspensions should consider all of these components, including axle brackets . 2 Contact Hendrickson for applications that may exceed GVW approval ratings . 3 Site Travel Rating — Ratings are limited to no more than 5% of vehicle operation at speed not to exceed 5 mph .

  • Page 5: Important Safety Notice

    Important Safety Notice Proper maintenance, service, and repair is important for the reliable operation of the suspension . The procedures recommended by Hendrickson and described in this technical publication are methods of performing such maintenance, service and repair . This technical publication should be read carefully to help prevent personal injury and to assure that proper methods are used .
  • Page 6 BEAM ENd CONNECTION ANd SAddLE CAp FASTENERS DO NOT ASSEMBLE BEAM END CONNECTION WITHOUT PROPER FASTENERS . HENDRICKSON RECOMMENDS THE USE OF HENDRICKSON FASTENERS TO SUSTAIN PROPER CLAMP FORCE . FAILURE TO DO SO CAN CAUSE ADVERSE VEHICLE HANDLING, PROPERTY DAMAGE OR PERSONAL INjURY .
  • Page 7 ASSEMBLIES WHEN THEY ARE UNRESTRICTED . AIR SPRING ASSEMBLIES MUST BE RESTRICTED BY SUSPENSION OR OTHER ADEQUATE STRUCTURE . DO NOT INFLATE BEYOND PRESSURES RECOMMENDED BY AIR SPRING MANUFACTURER, CONTACT HENDRICKSON TECHNICAL SERVICES FOR DETAILS . IMPROPER USE OR OVER INFLATION MAY CAUSE AIR SPRING ASSEMBLIES TO BURST, CAUSING PROPERTY DAMAGE AND / OR SEVERE PERSONAL INjURY .
  • Page 8 TRAVEL AND THE RIDE QUALITY OF THE SUSPENSION . MOdIFYINg COMpONENTS DO NOT MODIFY OR REWORK PARTS WITHOUT AUTHORIZATION FROM HENDRICKSON . DO NOT SUBSTITUTE REPLACEMENT COMPONENTS NOT AUTHORIZED BY HENDRICKSON . USE OF MODIFIED, REWORKED, SUBSTITUTE OR REPLACEMENT PARTS NOT AUTHORIZED BY HENDRICKSON MAY NOT MEET HENDRICKSON’S SPECIFICATIONS, AND CAN RESULT IN FAILURE OF THE PART, ADVERSE VEHICLE...
  • Page 9 40K • 46K ™ TORCH / wELdINg DO NOT USE A CUTTING TORCH TO REMOVE ANY FASTENERS . THE USE OF HEAT ON SUSPENSION COMPONENTS WILL ADVERSELY AFFECT THE STRENGTH OF THESE PARTS . A COMPONENT DAMAGED IN THIS MANNER CAN RESULT IN THE ADVERSE VEHICLE HANDLING AND POSSIBLE PERSONAL INjURY OR PROPERTY DAMAGE .

  • Page 10: Special Tools

    This shop made tool is made from cold rolled Hendrickson Part No. 66086-103 Hendrickson Part No. 66086-104 steel or equivalent . The drawings are for refer- ence only, Hendrickson does not supply this tool . OTC part No. 1757 OTC part No. 206457 Visit otctools .com Visit otctools .com...
  • Page 11 These shop made tools are designed for the torque rod bushings . Bushing tools are to be made from cold rolled steel or equivalent . Drawing is for reference only . Hendrickson does not supply these tools . uLTRA ROd BuSHINg...

  • Page 12: Parts Lists

    40K • 46K ™ SECTION 5 Parts Lists Parts Lists 17730-241...
  • Page 13 40K • 46K ™ VEHICLE VEHICLE KEY NO. PART NO. DESCRIPTION QTY. KEY NO. PART NO. DESCRIPTION QTY. Equalizing Beam Assembly 08017-000 1"-14 UNS Locknut See Selection Guide 45745-147 58795-000 Saddle Cap 44643-009L Cross Tube 44 ⁄ ", (If converted from RT•RTE 06696-000 ⁄...

  • Page 14: Ar2 Plumbing Diagram

    NOTE: * Item included in assembly / kit only, part not sold separately . ** Hendrickson’s part number is stamped on the torque rod for identification . Be sure to include the suffix number when ordering, this number indicates torque rod length . Hendrickson’s two-piece ULTRA ROD PLUS can be used to create the desired length, see literature number 45745-148 .

  • Page 15: Preventive Maintenance

    AR2 heavy-duty suspension system and component parts function to their highest efficiency . Look and replace any bent, cracked, worn or damaged parts . Hendrickson rec- ommends the AR2 heavy-duty rear suspension is inspected at pre-delivery, the first 1,000 miles (1,600 kilometers) of service and at the regular preventive maintenance intervals .

  • Page 16: Beam End Axle Brackets

    . As soon as the fastener starts to move, record the torque . Correct the torque if necessary . Replace any worn or damaged fasteners with genuine specified fasteners . For fasteners not supplied by Hendrickson, see vehicle manufacturer .
  • Page 17 40K • 46K ™ pHYSICAL INSpECTION BAR pIN STYLE ■ 1 . Inspect the axle brackets for damage or cracks in the locations shown in Figures 6-1 and 6-2 . Any axle bracket that is found damaged or cracked must be repaired or replaced . 2 .

  • Page 18: Equalizing Beam End Connection

    40K • 46K ™ EquALIzINg BEAM ENd CONNECTION An inspection of the beam end connections are necessary when a vehicle is in the shop for major repair work or every six months, whichever comes first . Periodic visual inspection by the driver and service personnel is also recommended .
  • Page 19 40K • 46K ™ NOTE The gap at each side of the visible rubber on the lower part of the bar pin end bushing is normal, see Figure 6-5, and is not an indication to replace the bushing . Because all rubber end bushings are in compression, with the load bearing on the top side, the lower side of the rubber is slightly relieved, allowing the rubber to move inward, and a gap appears .
  • Page 20 40K • 46K ™ VISuAL INSpECTION AdApTER STYLE ■ 1 . Chock the wheels . 2 . Visually inspect suspension components for signs of movement or excessive wear . Inspect equalizing beam end connection for signs of excessive wear or looseness ■...

  • Page 21: Bar Pin End Bushing

    40K • 46K ™ BAR pIN ENd BuSHINg FIguRE 6‑9 An indication that the bar pin end bushing requires replacement is when one or more of the following conditions apply: Visual inspection of: Contact areas (the flat face areas where ■...

  • Page 22: Frame Hanger To Trailing Arm Connection

    . The transverse torque rods center the axles under the frame and control axle walk-out during cornering . A two-piece torque rod is also available to cut and weld to the desired length, see Hendrickson publication No . 45745-148 .

  • Page 23: Saddle Connection

    It is important to check the torque rod fasteners for proper torque values, refer to the Torque Specifications section in this publication . NOTE Hendrickson recommends Grade 8 bolts, hardened flat washer and Grade C locknuts be used for all straddle mount torque rods . SAddLE CONNECTION Visually inspect for any signs of movement or looseness .

  • Page 24: Cross Tube

    IMPROPER jACKING METHODS CAN CAUSE STRUCTURAL DAMAGE WHICH CAN CAUSE ADVERSE VEHICLE HANDLING, PROPERTY DAMAGE OR SEVERE PERSONAL INjURY AND WILL VOID HENDRICKSON’S WARRANTY . DO NOT USE THE SUSPENSION CROSS TUBE, BAR PIN AXLE BRACKETS AS A jACKING POINT, SEE ■...

  • Page 25: Shock Absorber

    AR2 suspensions . When the shock absorber replacement is necessary, Hendrickson recommends replacement with the identi- cal original Hendrickson shock absorber for servicing . Failure to do so will affect the suspension performance, durability, and will void the warranty .
  • Page 26 40K • 46K ™ 2 . Use an infrared thermometer to check the temperature of the shock absorber . This can also be performed by carefully touching the shock body below the dust cover . Touch the frame to get an ambient reference, see Figure 6-16 . A warm shock absorber is acceptable, a cold shock absorber should be replaced .

  • Page 27: Alignment & Adjustments

    40K • 46K ™ SECTION 7 Alignment & Adjustments RIdE HEIgHT The AR2 suspension is equipped with dual height control valves located on the rear of the trailing arm and mounted on the frame or cross member gusset . Refer to the Plumbing Diagram section of this publication .
  • Page 28 40K • 46K ™ 6 . Deflate the suspension by using one of the following methods, if the vehicle: Method 1 — is equipped with a suspension dump system in the cab, deflate the suspen- ■ sion air system by using the cab dump valve control Method 2 —...

  • Page 29: Axle Pinion Angle

    40K • 46K ™ 4 . When checking or adjusting ride height, verify and maintain the vehicle’s air system at full operating pressure . SERVICE HINT It is important that the height control valves be cycled completely before and after any ride height adjustments .

  • Page 30: Drive Axle Alignment

    40K • 46K ™ TO CHECK THE pINION ANgLE 1 . Use a work bay with a level floor . 2 . Relax the suspension by slowly moving the vehicle back and forth several times in a straight line without using the brakes . This will slacken or loosen the suspension as the vehicle is posi- tioned .

  • Page 31: Lateral Alignment

    40K • 46K ™ 6 . Ensure all drive axle tires are at the same size . 7 . Securely clamp a six-foot piece of STRAIGHT bar stock or angle iron across the lower frame flange as shown in Figure 7-5 . Select a location for the bar stock or angle iron as far forward of the drive axle as possible where components will not interfere .

  • Page 32: Bar Pin With Shims Alignment

    " (3 mm) shim between the transverse torque rod and frame rail as needed . NOTE Hendrickson recommends the use of Grade 8 bolts and Grade C locknuts be used for all torque rod attachments . BAR pIN wITH SHIMS ALIgNMENT The alignment feature consists of specially designed, tight tolerance steel shims which fill the ⁄...
  • Page 33 40K • 46K ™ 1 . Determine direction of axle thrust angle . Figure 7-8 illustrates the forward drive axle with a thrust angle to the left (-negative thrust) . FIguRE 7‑8 SERVICE HINT Axle movement is in the same direction as whichever side of the bar pin receives an increase in shim thickness, see Figure 7-9 .
  • Page 34 40K • 46K ™ 3 . Chock the wheels of the front axles to prevent vehicle movement during service . 4 . Raise the frame of the vehicle to remove the load from the suspension . Support the frame at this height .

  • Page 35: Component Replacement

    . NOTE Hendrickson recommends the use of Grade 8 bolts and Grade C locknuts . If flange head bolts and locknuts are not used then hardened structural washers must be used under bolt heads and locknuts .

  • Page 36: Trailing Arm

    40K • 46K ™ 10 . Remove frame hanger and spacer plate (supplied by vehicle manufacturer) located between the frame hanger and lower cross member flange . 11 . Inspect the trailing arm bushing for wear or damage, refer to the Preventive Maintenance sec- tion of this publication .
  • Page 37 40K • 46K ™ THE WEIGHT OF THE TRAILING ARM ASSEMBLY IS APPROXIMATELY 225 POUNDS (102 KILOGRAMS) . CARE SHOULD BE TAKEN AT REMOVAL AND INSTALLATION TO PREVENT PERSONAL INjURY OR DAMAGE TO COMPONENTS . 11 . Remove air springs . 12 .

  • Page 38: Trailing Arm Bushing

    A shop press with a capacity of at least 100 tons ■ Adapter set tool — (Hendrickson Part No . 66086-102) – Refer to Special Tools section of this ■ publication for the tools to remove and install the trailing arm bushings Receiving tool —...
  • Page 39 40K • 46K ™ dISASSEMBLY 1 . Remove the trailing arm assembly from the vehicle . Follow the Trailing Arm Disassembly pro- cedure in this section . DO NOT USE A CUTTING TORCH TO REMOVE ANY FASTENERS OR BUSHINGS . THE USE OF HEAT ON SUSPENSION COMPONENTS WILL ADVERSELY AFFECT THE STRENGTH OF THESE PARTS .

  • Page 40: Air Spring

    40K • 46K ™ 4 . Support the trailing arm squarely at the bore area to avoid distortion of the trailing arm bush- ing bore or bending of the trailing arm . 5 . Lubricate the outer diameter (O .D .) of the trailing arm bushing and the inner diameter (I .D .) of the trailing arm bushing bore with an NLGI#2 –...
  • Page 41 40K • 46K ™ INSpECTION 1 . Inspect the mounting surfaces on the trailing arm and the upper air spring mounting bracket for cracks or damage . Replace as necessary . ASSEMBLY 1 . Install the ½" studs in the bottom of the new air spring and tighten to 25 ±...

  • Page 42: Shock Absorber

    40K • 46K ™ SHOCK ABSORBER NOTE It is not necessary to replace shock absorbers in pairs if only one (1) shock absorber requires replacement . dISASSEMBLY 1 . Remove the lower mounting bolts, fasteners, and spacer . 2 . Remove the upper locknut and washer . 3 .

  • Page 43: Equalizing Beam

    40K • 46K ™ FIguRE 8‑8 ASSEMBLY 1 . Install the air fittings into the new height control valve using Teflon thread seal . 2 . Install the height control valve to the frame mounting bracket by attaching the ¼" washers and  ...
  • Page 44 40K • 46K ™ FIguRE 8‑9 FIguRE 8‑10 8 . Support both equalizing beams with a floor jack . 9 . Remove and discard beam end attaching fasteners . NOTE Prior to disassembly of the equalizing beam bar pin fasteners, note the orien- tation of the bar pin alignment shims, see Figure 8-10 .
  • Page 45 4 . If the suspension is equipped with: Bar pin Style End Connection — Refer to Bar Pin Installation in this section ■ Adapter Style End Connection — Refer to Hendrickson Publication 17730-190 or con- ■ tact Hendrickson Tech Services for more information 5 .
  • Page 46 SAME ORIENTATION MUST BE USED AT BOTH BOLT LOCATIONS ON ANY ONE (1) END BUSHING . DO NOT INSTALL OR STACK MORE THAN ONE (1) SHIM AT EACH BOLT LOCATION . USE GENUINE HENDRICKSON BAR PIN SHIMS, DO NOT USE STANDARD WASHERS . FAILURE TO FOLLOW THESE WARNINGS MAY RESULT IN IMPROPER VEHICLE ALIGNMENT, FRACTURE OF THE AXLE BRACKET OR BAR PIN WHICH COULD RESULT IN THE ADVERSE VEHICLE HANDLING AND POSSIBLE PERSONAL INjURY OR PROPERTY DAMAGE .
  • Page 47 DEFORMED, RESULTING IN BENT BOLTS OR ASSEMBLY DAMAGED . NOTE Hendrickson recommends the use of Grade 8 bolts and Grade C locknuts . If flange head bolts and lock- nuts are not used then hardened structural washers must be used under bolt heads and locknuts .

  • Page 48: Center Bushing

    A shop press with a capacity of at least 100 tons ■ Center bushing tool — (Hendrickson Part No . 66086-100) – Refer to Special Tools section of ■ this publication for the tools to remove and install the rubber center bushings Receiving tool —...
  • Page 49 40K • 46K ™ 2 . Place the equalizing beam assembly in a shop press with the center hub firmly supported on the press bed . NOTE Before attempting to remove the beam center bushings, inspect the inside face of each equalizing beam center hub .

  • Page 50: Bar Pin End Bushings

    ASSEMBLY, ADVERSE VEHICLE HANDLING AND POSSIBLE PERSONAL INjURY OR PROPERTY DAMAGE . NOTE Hendrickson bar pin service kits containing alignment shims, (Kit No . 34013-088L) or (Rotating Bar Pin Bushing Kit No . 34013-188) contain all the components required for one (1) equalizing beam end, see Parts List section of this publication .
  • Page 51 2 . Measure the equalizing beam end hub bore inner diameter and the bushing outer diameter . The Hendrickson specification for the equalizing beam end hub bore diameter of the equal- izing beam is 4 .365" ± .004", (110 .87 mm ± .10 mm) see Figure 8-21 . If components are NOT within the specified range, replacement is required .
  • Page 52 ™ FIguRE 8‑22 2 . Install Hendrickson Part No . 66086-103 (OTC 1757) end bushing installation tool (refer to Special Tools section of this publication) on the new end bushing as shown in Figure 8-22 . Tighten the through bolt until the two (2) halves of the tool touch . The installation tool com- presses the rubber between the inner and outer metal of the bushing to allow press force to be transmitted only to the outer metal of the bushing .

  • Page 53: Adapter Style End Bushing

    ■ 100 tons Air hammer / chisel / Bent chisel, see ■ Figure 8-25 Hendrickson Part No . 66086-102 (OTC Part ■ No . 1764), see Special Tools section of this publication REMOVAL THE ADAPTER REMOVAL PROCESS CAN CAUSE DAMAGE . REUSE OF DAMAGED OR WORN ADAPTERS COULD RESULT IN A COMPONENT FAILURE LEADING TO ADVERSE VEHICLE HANDLING AND POSSIBLE PERSONAL INjURY .
  • Page 54 40K • 46K ™ FIguRE 8‑27 FIguRE 28 10 . The beam end adapters have two chisel recesses located in their flanges as shown in Figure 8-28 . 11 . Locate the recess for the chisel, rotate the adapter if necessary . Place the air hammer / chisel in the recess to rotate the adapter collar .
  • Page 55 40K • 46K ™ FIguRE 8‑30 FIguRE 8‑31 Tapered Adapter End Up Tool Clamp Adapter Style Rubber End Bushing CHECK TO ENSURE PROPER ALIGNMENT OF TOOLING Equalizing Beam ADAPTERS WITH EQUALIZING BEAM COMPONENTS BEFORE APPLYING FULL HYDRAULIC PRESSURE WITH A SHOP PRESS . 5 .

  • Page 56: Longitudinal Torque Rods

    . NOTE Hendrickson recommends the use of grade 8 bolts and grade C locknuts . If flange head bolts and locknuts are not used then hardened structural washers must be used under bolt heads and locknuts .

  • Page 57: Transverse Torque Rods

    40K • 46K ™ TRANSVERSE TORquE ROdS AR2 SUSPENSIONS INCORPORATE TRANSVERSE RODS FOR VEHICLE STABILITY . IF THESE COMPONENTS ARE DISCONNECTED OR ARE NON-FUNCTIONAL, THE VEHICLE SHOULD NOT BE OPERATED . FAILURE TO DO SO CAN RESULT IN ADVERSE VEHICLE HANDLING, ADVERSE VEHICLE HANDLING, POSSIBLE TIRE CONTACT WITH THE FRAME, PREMATURE COMPONENT DAMAGE, OR SEVERE PERSONAL INjURY .

  • Page 58: Ultra Rod • Ultra Rod Plus

    6 . Install transverse torque rod frame bracket, spacer plate, and backup plate as per prior to removal . NOTE Hendrickson recommends the using Grade 8 bolts and Grade C locknuts for all torque rod attachments . 7 . Prior to tightening torque rod fasteners ensure the vehicle is at the proper ride height, refer to Ride Height in the Alignment &...
  • Page 59 40K • 46K ™ FIguRE 8‑37 ASSEMBLY 1 . Clean and inspect the inner diameter of the torque rod end tubes . NOTE dO NOT use paraffinic oil, or soap base lubricant . Such lubricants can cause adverse reactions with the bushing, such as deterioration of the rub- ber, causing premature failure .

  • Page 60: Xtrb Torque Rod Bushings

    40K • 46K ™ FIguRE 8‑41 xTRB TORquE ROd BuSHINgS YOu wILL NEEd A vertical press with a capacity of at least 10 tons ■ Shop made receiving tool and installation / removal ■ tool, see the Special Tools section of this publication for more information DO NOT USE HEAT OR USE A CUTTING TORCH TO REMOVE THE BUSHINGS FROM THE TORQUE ROD .

  • Page 61: Cross Tube

    40K • 46K ™ ASSEMBLY 1 . Clean and inspect the inner diameter of the torque rod end hubs, see Figure 8-45 . SERVICE HINT dO NOT use a paraffinic oil, or soap base lubricant . Such lubricants can cause adverse reactions with the bushing, causing premature failure .
  • Page 62 40K • 46K ™ FIguRE 8‑47 FOLLOW THE SAFETY GUIDELINES FOR OPERATING THE TORCH . USE CAUTION AS PARTS MAY BE HOT . FIguRE 8‑48 ASSEMBLY 1 . Clean the open end of the center bushing bore to approximately 1" (25 .4 mm) depth of weld and debris .

  • Page 63: Ar2 Conversion From Rt•Rte

    AR2 Conversion from RT•RTE This section is only for the conversion from a Hendrickson RT•RTE rear suspension [52" or 54" (1,321 mm or 1,372 mm) axle spacing, with a 9½" or 10½" (241 mm or 267 mm) ride height] to AR2.

  • Page 64: Section 9 Ar2 Conversion From Rt•Rte

    40K • 46K ™ LONgITudINAL ANd TRANSVERSE TORquE ROdS Refer to Preventive Maintenance section in this publication for complete longitudinal and trans- verse torque rod inspection . VEHICLE pREpARATION ANd SuSpENSION REMOVAL dISASSEMBLY 1 . Chock the front wheels . 2 .
  • Page 65 6 . Center punch and drill holes in the frame . 7 . Remove any burrs or shavings on the new holes . 8 . Hendrickson recommends to paint the frame rails to inhibit rust prior to installation of the AR2 suspension components .
  • Page 66 Parts List section of this publication . SuSpENSION AIR SYSTEM pRESSuRE gAugES Hendrickson recommends when installing an AR2 suspension conversion kit, to have two (2) in- dash air pressure gauges installed . These gauges will help determine equal loading of the vehicle as well as indicate any potential suspension air system problem .
  • Page 67 40K • 46K ™ Method 2 — is to clamp the blank hanger to the frame and line up the existing holes in the ■ frame from the RT hanger . Center punch the holes in the blank hanger and remove the hanger from the frame .
  • Page 68 40K • 46K ™ 8 . Lower the frame to the correct ride height . 9 . Tighten the 1" fasteners to 470 ± 25 foot pounds torque . AIR SpRINg INSTALLATION FIguRE 9‑7 1 . The upper air spring brackets are NOT identical .
  • Page 69 40K • 46K ™ 5 . Install ¾" x 7¼" lower shock mounting bolt and washer from the inboard side into the trailing arm and the shock absorber . Install outboard washer and locknut, see Figure 9-9 . 6 . Tighten both of the shock eye locknuts to  60 ± 10 foot pounds torque .

  • Page 70: Section 10 Torque Specifications

    40K • 46K ™ SECTION 10 Torque Specifications Hendrickson recommended torque values provided in Foot Pounds Torque Specifications 17730-241...
  • Page 71 NOTE: Axle and frame mount hardware are supplied by vehicle manufacturer . * Torque values listed above apply only if Hendrickson supplied fasteners are used . If non Hendrickson fasteners are used, follow torque specifications listed in the vehicle manufacturer’s service manual .

  • Page 72: Section 11 Troubleshooting Guide

    Information contained in this literature was accurate at the time of publication. Product changes may have been made after the copyright date that are not reflected. 17730-241 Rev A 07-18 © 2018 Hendrickson USA, L.L.C. All Rights Reserved Printed in United States of America...

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