truck - aus-002 - wd installation...page 3 of 14 49441-101 rev b installation the installation of...

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WD2, 3 SERIESTRUCK AIR SUSPENSIONINSTALLATION &MAINTENANCE

No: TRUCK AUS–002Subject: Service InstructionDate: April 2000 Revision: B

CONTENTSSubject PageDescription & Operation....................... 2Important Safety Notice ....................... 2Installation ............................................ 3Air System............................................ 3

Installation Procedure...................... 4Initial Setup...................................... 5Dump Valves ................................... 6High Flow Valves............................. 7

Adjustments ......................................... 7Ride Height...................................... 7Frame Slope.................................... 7

Subject PageAlignment ..............................................7

Bar Pin Bushing ...............................7Preventative Maintenance....................9

Pivot Bushes ....................................9Bar Pin Connection ..........................9Torque and Transverse Rods .........10

Component Replacement....................10Bar Pin Beam End Bushings ..........10Torque Rod Bushings .....................13Pivot Bushings ................................14

Specifications.......................................14Torque Settings....................................14

TECHNICALBULLETIN

THE BOLER COMPANYCOPYRIGHT ©2000HENDRICKSON ASIA PACIFIC PTY LTDALL RIGHTS RESERVED

ABN 21 004 992 769

5 Abbotts Road, P.O. Box 1063, Dandenong, Victoria 3175 AustraliaPhone 61.3.9767.3400Fax 61.3.9767.3499

www.hendrickson.com.au [email protected]

HENDRICKSON

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DESCRIPTION & OPERATION

The WD2, 3 Series of heavy duty airsuspension was designed, engineered andtested in Australia. The aim to provide an airsuspension that would prove ideal for extraheavy duty on/off highway & road trainapplications that are unique to Australia.

Featuring the proven axle attachmentconnection as used on the famous RT series.Upper longitudinal torque rods absorb axlebraking and driving torques and the transversetorque rods give positive lateral location of theaxles.

The heavy duty pivot bush and shock absorberscombine to provide a combination of good rollstiffness, cross axle articulation and quietoperation.

The WD2, 3 is available as a single, tandem ortriaxle configuration with the following loadratings:

SuspensionModel

Ground Load(ton)

GrossCombinationMass (tonne)

WD2-230 10.4 60WD2-460 20.8 126WD2-600 24 150WD3-460 20.8 142WD3-600 24 185

IMPORTANT SAFETY NOTICE

Proper service and repair is important to thesafe and reliable operation of the WD2, 3suspension. The service proceduresrecommended by Hendrickson and described inthis publication are effective methods ofperforming maintenance. Some of theseoperations may require the use of shop madetools for the removal and installation ofbushings.

There are various warnings and cautions thatshould be read carefully to minimise the risk of

personal injury and to ensure proper methodsare used. Improper servicing may damage thevehicle or render it unsafe for operation.

WARNING:HENDRICKSON REMINDS USERS TOADHERE TO THE PUBLISHED CAPACITYRATINGS FOR THE SUSPENSIONS.

DO NOT MODIFY OR REWORK PARTS. DONOT USE SUBSTITUTE PARTS. USE OF AMODIFIED OR SUBSTITUTE PART IS NOTRECOMMENDED BECAUSE THE PART MAYNOT MEET HENDRICKSON’SSPECIFICATIONS, WHICH COULD LEAD TOFAILURE OF THE PART, LOSS OF VEHICLECONTROL AND POSSIBLE PERSONALINJURY OR DAMAGE OF PROPERTY.

DO NOT USE A CUTTING TORCH TOREMOVE ANY ATTACHING FASTENERS.THE USE OF HEAT ON SUSPENSIONCOMPONENTS WILL ADVERSELY AFFECTTHE STRENGTH OF THESE PARTS. ACOMPONENT DAMAGED IN THIS MANNERMAY RESULT IN LOSS OF VEHICLECONTROL AND POSSIBLE PERSONALINJURY OR DAMAGE OF PROPERTY.

EXERCISE EXTREME CARE WHENHANDLING OR PERFORMINGMAINTENANCE IN THE AREA OF THE BEAMASSEMBLY.DO NOT CONNECT ARC WELDINGGROUND LINE TO ANY BEAM.DO NOT STRIKE ARC WITH THEELECTRODE ON THE BEAM.DO NOT USE HEAT NEAR THE BEAMS.DO NOT NICK OR GOUGE THE BEAMS.

A BEAM WHICH HAS BEEN SUBJECTED TOANY OF THE CONDITIONS MAY FAIL,LEADING TO LOSS OF VEHICLE CONTROLAND POSSIBLE PERSONAL INJURY ORDAMAGE OF PROPERTY.

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INSTALLATION

The installation of the WD2, 3 suspension isillustrated below in “Figure 2”. “Figure 2” is anexploded isometric view of all suspensioncomponents, which constitutes a singlesuspension station. The torque rods and crosstube assemblies are required for each axle.

AIR SYSTEM

The air system of the WD2, 3 Seriessuspension utilises a dual circuit configurationwith two height control valves (HendricksonPart # 57977) for increased roll control. Refer“Figure 3”. The following guidelines should befollowed when installing an air system for usewith the WD2, 3 suspension:

Item Part No. Qty Description Item Part No. Qty Description1 98558-007/008 2 WD2 Beam Assy LH(007), RH(008) 10 44643-111 2 Cross Tube1 98558-037/038 2 WD3 Beam Assy LH(037), RH(038) 11 98111-022 2 H/Ware Kit – Cross Tube2 98541-012 4 Frame Hanger 12 32271-014 1 Torque Rod Front (635)3 98751-001 2 Spacer Plate Front - 32271-005 1 Torque Rod Rear (603)

98737-001 2 Spacer Rear 13 30235-016B 2 Torque Rod Transverse (620)4 98111-012 4 H/Ware Kit – Pivot Bolt 14 98147-016 1 H/Ware Kit – Torque Rods5 56659-001 1 H/Ware Kit – Bar Pin 15 58986P 2 Height Control Valve6 57122-002 4 Air Spring 16 57975 2 Bracket HCV – Upper7 49177-005 2 H/Ware Kit – Air Spring 17 98676-001 2 Bracket HCV – Lower8 57322-001 4 Shock Bracket Upper 18 22110-460 2 Link Assy HCV9 S-20886 4 Shock Absorber 19 98111-024 1 H/Ware Kit - HCV

Figure 2

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1. From the point where the main supply line istaken, you should always ensure that there is apressure protection valve fitted. This willprotect the main air supply from the truckshould an air spring, or an air line, be damaged.

2. The use of two (2) height control valvesrequires a high volume of air. It isrecommended that the supply line size from thetruck air supply to the height control valves be½” OD nylon tubing. This will ensure that bothvalves are supplied with sufficient air volume.

Installation Procedure1. Identify required component, there are twobrackets for each valve. Their purpose is asfollows:a. The upper HCV mounting bracket (Part #57975) bolts directly to the chassis as shown in“Figure 2”. The chassis rail should be pre-drilled by the vehicle manufacturer.

b. The lower HCV linkage bracket, (Part #98676-001) attaches to the main suspensionbeam – refer “Figure 2”.

Note: When mounting the valves to themounting brackets ensure that the valves donot protrude above the top of the chassisflange. For vehicles with cut down chassisrails at the rear it will be necessary to mountthe valves in a horizontal position.

2. Attach the HCVs to the upper mountingbrackets (Part # 57975) and then attach thebrackets to the vehicle's chassis rails. Fastenall bolts to the required torque.

3. Attach airlines to height control valve ports –refer “Figure 4”.

4. A plastic locating pin is supplied with eachvalve to help simplify the installation and rideheight adjustment. (Refer AdjustmentProcedure.) See “Figure 4”.

Figure 3

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Initial Setup1. When both valves are mounted, completewith link rods and control arms, ensure that:

a. Both control arms are positioned out as longas possible facing towards the air springs oneach side.

b. Both control arms are of the same height.This can be checked by running a straight edgefrom the top side of the chassis and measuringdown to a given point on the control arm. If it isfound that the control arms are not the same,loosen the HCV bolts and readjust the HCV.

2. A given ride height must be obtained asshown in “Figure 5” and “Table 2” below.

Ride HeightOEMMinimum Maximum

Ford 390 mm 400 mmInternational 390 mm 400 mm

Kenworth 430 mm 440 mmOther 390 mm 400 mm

Table 2

3. This ride height is measured from the uppersurface of the cross tube to the underside of thechassis when the vehicle brakes have beendisengaged and the truck is on flat ground. See“Figure 5”.

4. When the correct ride height is achieved:

a. Deflate the suspension in the cab of thevehicle with the pilot valve switch.

b. Allow the suspension to deflateapproximately 30 mm.

c. Reinflate to allow the suspensions to returnto the pre-set ride height.

Note: Ensure that the truck has sufficientair in its air system.

5. Check that your ride heights, both left andright hand sides, are the same. You can alsotake a measurement from the concrete padsurface to the underside of the chassis. If thisis not correct, adjust your link rod on the sidethat is not correct.

6. Be aware that both types of valve used onthe WD2, 3 suspension range have a very smallneutral area in the movement of the controlarm.

Figure 4

Figure 5

Ride HeightMeasurement

SUPPLY FROM AIR TANKPORT EI/IE AIR TO AIR SPRINGS

ONE OR BOTH PORTS CAN BE USEDPORT C1/C2

DUMP SIGNAL PORT MIN 50 PSIRQD. TO ACTIVATEDUMP

EXHAUST PORTPORT EI/IE

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Note: This area is found between inflationand deflation areas of the valve.

In the event of pressure loss in the suspensionthe vehicle can be driven for short distancesonly at low speed on the bump stops. Thevehicle should have been fitted with a brakepressure protection valve so pressure shouldalways be available to the braking system.

If the air springs deflate then the followingshould be checked:

a. Air supply is sufficient from the compressor.

b. Pressure protection valve is functioning.

c. Height control valve fittings are not clogged.

d. There are no leaks from connections or theheight control valve.

Note: The use of a good quality air filter /dryer system is strongly recommended toprovide clean, dry air to the suspensionsystem.

For detailed and fine adjustment, refer tosection “Adjustments – Ride Height”.

Dump ValvesTo allow manual dumping of the air systemfrom a cab mounted remote, an optional dumpswitch may be installed (Part # 98867-001).

Figure 6

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High Flow ValvesTo achieve exceptional roll control withimproved air system response times a HighFlow Height Control Valve (HF-HCV)(Hendrickson Part # 98603-001) may be fitted.When using two High Flow Height ControlValves the need for a high volume supply of airis increased. It is recommended that the supplyline size from the truck air supply to the HF-HCV must be ½” OD nylon tubing. This willensure that both valves are supplied withsufficient air volume.

Note: Each HF-HCV is capable of a 10 cfmflow rate.

The HF-HCV has two delivery ports. Both portsmay be connected to provide maximum air flowor a single port only may be used with areduction in air flow rate. If a single port only isused as the delivery port, the other supply portmust be plugged.

Note: The delivery line size, from each HF-HCV to the air springs is to be 3/8” OD nylontubing.

ADJUSTMENTS

Ride HeightThe suspension is designed to run at the rideheight shown in “Table 2”, measured from thetop surface of the cross tube to the chassisunderside. Variation from this height range willcause reduced articulation capability.

As with most air suspensions, the ride heightwill be substantially constant at all conditions ofloading.

To adjust the ride height:

a. Position the vehicle on a level concrete pad,since any poor surface will give an incorrectreading.

b. With the suspension in a deflated conditionand the park brakes off, start the vehicle and

build up the air system. As the air systempressure builds, the height control system willallow the inflation of the air springs.

c. When the suspension has stopped inflating,take a measurement from the top of the crosstube to the underside of the chassis, asdepictured in “Figure 5”.

Frame SlopeVariations in frame slope from the original buildspecifications may occur. This may be due tochanges in the vehicle’s front springs. The rideheight should never to adjusted to compensatefor changes in the frame slope.

ALIGNMENT

The vehicle manufacturer should be consultedfor alignment specifications. If in doubt, thesuspension should be aligned so that thewheels are parallel to the frame centre-line.

Transverse torque rods should be shimmed toposition the frame centrally to the wheels.

Bar Pin BushingThe adjustable bar pin beam connectionpermits tandem axle suspensions to be alignedrelative to the vehicle centre line or steer axleand to each other. Maintaining proper wheel /axle alignment will prolong tyre life, improve fueleconomy, lessen maintenance on othersuspension and drive line components.

Each adjustable bar pin beam busing andconnection is fastened to the axle by two oneinch (1”) diameter, Grade 8 (high strength) boltsand two one inch (1”) Grade C locknuts. Oneinch (1”) ID hardened flat washers are locatedunder both the bolt head and locknut. The boltsare positioned parallel to the vehicleslongitudinal axis, making removal and assemblyeasy.

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The adjustable bar pin connection is a rubberbushing assembly consisting of a rubber insertsandwiched between an outer metal tube andan inner bar pin metal. The rubber insert isrestricted at both ends by steel confinementwashers. The alignment shims slip over theends of the bar pin. See “Figure 8”.

The alignment feature consists of speciallydesigned, tightly toleranced steel shims whichfill the 10mm total gap between the bushing’sinner metal and the axle bracket legs. The gapmust be filled by placing the shims on thebushing assembly in one of the positions shownin “Figures 7, 9 or 10”. Hendrickson hasprovided three shim designs – Part #s 50130,50131 and 57026 – for ease of alignment.Each shim has been designed to completely fillthe gap, while providing the necessaryadjustment. “Figure 10” shows an isometricview of each genuine Hendrickson shim. Notethe part numbers and material thickness arestamped on each shim leg.

WARNING: A SHIM MUST BE INSTALLEDAT EACH BOLT LOCATION. THE SAMEPART NUMBER SHIM IN THE SAMEORIENTATION MUST BE USED AT BOTHBOLT LOCATIONS ON ANY ONE BUSHINGASSEMBLY.

DO NOT INSTALL OR STACK MORE THANONE SHIM AT EACH BOLT LOCATION.

USE GENUINE HENDRICKSON SHIMS, DONOT USE STANDARD WASHERS.

THE FAILURE TO FOLLOW THESEWARNINGS MAY RESULT IN THEFRACTURE OF EITHER THE BRACKET ORBAR PIN WHICH COULD RESULT IN LOSSOF VEHICLE CONTROL AND POSSIBLEPERSONAL INJURY OR PROPERTYDAMAGE.

Refer to Hendrickson Technical Publication17730-213 for recommended procedures tocorrect forward and rear axle alignment usingcomputerised and/or laser projection alignmentequipment.

Figure 7(RT Beam shown for clarity)


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PREVENTATIVE MAINTENANCE

Recommended PeriodsVisual inspection - At 20,000 km service then at80,000 km (annual) intervals

Torque checks - At initial service then at annualservices. (Severe service operation mayrequire more frequent maintenance checks.

Proper preventative maintenance programs willhelp control down-time. This is important forsafe and reliable operation. We alsorecommend that all the tightening torques bechecked with a calibrated torque wrench atleast once a year.

Pivot Bushes1¼” flat washers are located under the boltheads and the locknuts. The tightening torqueof the pivot bolt is 1085 Nm (800 lb.ft.).

The pivot bolt requires that the correct torquebe maintained, all bushing motion isaccommodated by rubber deflections. Thetorque should be checked whenever thesuspension is first installed and again after1,600 kms of off-highway service and 16,000kms of on-highway service.

Bar Pin ConnectionOne inch (1”) hardened flat washers are locatedunder both the bolt heads and the locknuts.The bolts are installed from end of beam towardthe centre line and are positioned parallel to thevehicle longitudinal axis, making removal andassembly easy. The tightening torque for thebar pin connection with 1” bolts to be torqued to780 Nm (575 lb.ft.).

The beam connection required that thefasteners be kept tight to maintain the clamp ofthe axle bracket legs to the bushing innermetals. All bushing motion is accommodatedby rubber deflection. The torque should bechecked when a new or repaired vehicle isplaced in service, and again after 1,600 km ofoff-highway service, or 16,000 km of on-highway service.



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Torque Rods and Transverse RodsThe length of the torque rods is specified by thevehicle manufacturer for optimum drive lineangles. The torque rods control these anglesand also absorb driving and braking forces.The length of the transverse torque rods isdetermined by the vehicle manufacturer tocentre the axle under the frame. Thetransverse rods control axle walk out duringcornering. The mounting brackets at the axleends of both rods are furnished and welded intoposition on the axle housings by the axlemanufacturer.

Both types of rods may have attaching endsdesignated “straddle mount” or “tapered stud”.

Straddle mount rod end attaching fasteners arefurnished by the vehicle manufacturer. It isimportant that the tightening torque of thelocknuts be checked during preventativemaintenance service. Follow the vehiclemanufacturer’s specifications for tighteningtorque values.

Note: Hendrickson suspensionrecommends Grade 8 bolts and Grade Clocknuts be used for all straddle mounttorque rod and straddle mount transverserod attachments.

Tapered stud rod locknuts also should bechecked. The tightening torque is 270 Nm (200lb.ft.).

Inspect all rods for looseness, or torn orshredded rubber. A level check can be madewith a long pry bar placed under each torquerod end and pressure applied. Longitudinaltorque rods can be checked slowly rocking anempty vehicle with power and brakes applied,while a mechanic visually checks the action atboth ends.

Whether the rod ends are straddle mount ortapered stud, they can be renewed by pressingout the worn end, and installing a cartridge stylereplacement.

COMPONENT REPLACEMENT

Bar Pin End BushingsApply a penetrating oil to the threads of 1”diameter bolts and locknuts that connect theend bushing inner metal to the axle bracket.While supporting the end of the beam, removethe bolts. If fasteners are rusted in place, an airhammer chisel may be used to loosen the boltfrom the axle bracket and bushing.

Note: The upper torque rods may have tobe disconnected at the top of the axle andthe axle rotated to a more vertical positionto assist in the removal of the bar pinbushing from the bracket.

CAUTION: Support the end of the beam asit may drop when through bolts areremoved. After all fasteners are removedthey should be discarded. DO NOT REUSETHE FASTENERS.

WARNING: When removing and installingbushings in the beams, follow theprocedures outlined in this publication. Donot use a cutting torch to remove thebushings outer metals pressed in the bores.Welding, torching or attaching material tothe beam must never be performed. Theuse of heat adversely affects the strength ofthe beams.

After removing the bushings, thoroughly inspecteach beam bore. If torch undercutting is foundfrom previous rebushing, replace the entirebeam. Do not take responsibility for possibleroad failure by rebushing a beam in thiscondition.

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The bar pin style rubber bushing can beremoved with Owattonna Tool Company’stooling or with shop made tools. When usingthese tools it is important that they arepositioned against the edge of the outer metalof the bushing for pressing into the end bore ofthe equalising beam.

Begin removing the confinement washer fromone end of the bushing for pushing toolclearance. This may require the use of a chiselwhere the washer has been staked to the innercasting of the bushing as shown in “Figure 12”and “Figure 13”. Then cut the protruding rubberon the same end of the beam busing as shownin “Figure 14”. This permits the pushing tool tocontact the outer metal of the bushing. A pieceof 4¼” OD by 5” long steel tubing can be usedto remove the bushing. Use a shop press witha capacity of at least 80 tons. Place the beamin the shop press with the beam bore squarelysupported on the press bed for safety and toavoid bending the beam. Centre of the pushingtool on the outer metal of the busing and pushthe bushing out of the beam bore.

CAUTION: The outer metals of someHendrickson rubber bushings are coveredwith a phosphate coating, which acts as arust preventative. This coating must beremoved with emery cloth beforeinstallation. Also apply a coating of greaseto the beam bores to facilitate pressing thenew bushings into the beam bores.

Rubber end bushings can be installed withOwattonna Tool Company’s tools or with shopmade tools. If Owattonna Tool Company’stools are used, follow their instructions. Caremust be taken during installation of the bushing.Do not push the inner metal or bushing damagewill result.

If shop made tooling is to be used, a piece of½” wall by 5” OD by 45/8” long steel tubing, mustbe reworked as detailed in “Figure 14”, to installthe bar pin bushings. The assembly tool mustbe split in half then clamped or bolted togetherto compress the rubber to allow contact with thebushing outer metal as shown in “Figure 14”.

Place the beam in the shop press with thebeam end bore squarely supported on the bedfor safety, and to avoid bending the beam.Before pressing the bar pin bushing, the holesin the end of the bar pin bushing should be inline with the centre line of the beam to facilitate

Figure 13

Figure 12

Figure 11

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assembly into the axle brackets on the vehicle.Care should be taken during the assemblyprocess to assure the orientation of the bar pinbushing in the beam bore. (See “Figure 15”)After installation, verify that the new bushingsare centred in the end of the beam.

Prior to assembly, axle bracket inspection isrequired.

For bar pin style, inspect the 27.8mm diameterholes in each of the four (4) axle bracket legsas shown in “Figure 16”. Look for hairlinecracks between the edge of the axle bracket legand the 27.8mm hole.

Excessive wear caused by contact with the 1”diameter bar pin connection bolts should alsobe cause for axle bracket replacement. Contactthe axle manufacturer for instructions.

The dimension between the inside surfaces ofthe axle bracket legs must be 57.74/57.55 asshown in “Figure 17”. Any cracks detected nearthe top of the axle bracket legs as shown in“Figure 17” requires replacement of the axlebracket.

Figure 14

Figure 15

Figure 16

Figure 17

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Remove any burrs prior to assembly; this willaid the assembly process. Raise the beam endinto the axle bracket and support it with a jack.If the axle pinion angle causes difficulty inassembly, disconnect the upper torque rod androtate the axle so that the bar pin slips into thebracket. For minor adjustments there are lugson the ends of the bar pin bushing - with anopened wrench the inner metal of the bushingcan be rotate slightly to ease assembly.

Prior to assembly of the fasteners, the operatormust reconfirm that the shim style bar pinbushing is sued, all the shims are installed.

With the longitudinal torque rods disconnected,assemble the bolts, washers and locknuts.Tighten the locknuts to 640 Nm (470 lb.ft.)torque. Reconnect the torque rods prior tomoving the vehicle.

For detailed alignment procedures andinstructions refer to Hendrickson TechnicalPublication 17730-213.

Torque Rod & Transverse Torque RodBushings

WARNING: It is possible that the beamconnections to the axle brackets are loose.If they are, the axle could be free to pivot onthe beam ends. Use necessary blocking toprevent harm to personnel and to avoiddamage to the drive lines, power divider anddifferential carriers.

Straddle mount rod ends, as shown in “Figures18 & 19”, may be removed by removing thelocknuts, bolts, washers and any adjustmentshims. Note the number of shims at eachlocation as they must be reinstalled in the samemanner to avoid affecting axle settings.

Tapered stud rod ends, as shown in “Figure 20”may be removed from the bracket by removingthe locknut and spacer washer and rapping theaxle bracket with the hammer to break the studfree.

Use Owattonna Tool Company’s tool set toremove and install the rod bushings. Followtheir instructions.

To install a straddle mount end, position the rodend at the bracket, and assemble the bolts,washers, locknuts and any adjustment shims asnoted during disassemble. Torque tospecification.

Figure 19

Figure 18

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To install a tapered stud end, the bracket holemust be free of all foreign matter. Place thestud in the bracket and assemble the locknutwith spacer washer and tighten the locknut to270 Nm (200 lb.ft.) torque. After tightening rapthe bracket with a hammer as shown in “Figure20” and re-tighten to 270 Nm (200 lb.ft.) torque.

Pivot BushesApply a penetrating oil to the threads of the 1¼”bolts and locknuts of the pivot bolt whichconnects the beam with the frame hanger.While supporting the end of the beam removethe bolt.

CAUTION: Support the end of the beam asit may drop when through bolts areremoved. After all fasteners are removedthey should be discarded. DO NOT REUSETHE FASTENERS.

WARNING: When removing and installingbushings in the beams, follow theprocedures outlined in this publication. Donot use a cutting torch to remove thebushings’ outer metals pressed in thebores. Welding, torching or attachingmaterial to the beam must never beperformed. The use of heat adverselyaffects the strength of the beams.

Once the pivot bolt has been removed, removeall frame hanger fasteners and remove framehanger. The pivot bush should now be easilyaccessed. To remove the bush and replace itutilise a shop made tool.

The assembly of these components is thereverse of the above.

SPECIFICATIONS

TORQUE SETTINGS

All threads must be clean and lubricated withSAE 20 oil before assembly to obtain thecorrect relationship of torque and fastenertension.

To obtain maximum service life from yoursuspension system, mounting bolts and nutsshould be check at least once a year andtightened to correct torque.

DESCRIPTION Nm lb.ft.

Pivot Bolt – Main Beam 1085 800

Bar Pin – Axle Connection Nut/Bolt 780 575

Shock Absorber – Locknut 90 65

Air Spring – Upper Retaining Nut 35 25

Air Spring – Lower Retaining Bolts 70 50

Cross Tube Locating Nut / Bolt 90 65

HCV – Linkage Rod Nut 16 12

Transverse Torque Rod (Tapered) Locknut 270 200

Torque Rod Locknut – Straddle Mount 350 260

Table 3

All other torque limits are determined bythe following bolt or nut diameters

Torque LimitDiameter(inches) Grade

Nm lb.ft.

1/4 5 85-115 (in-lbs) 97-129

5/16 5 12-17 17-23

3/8 8 31-42 43-56

7/16 8 50-70 67-94

1/2 8 75-105 102-142

9/16 8 110-150 150-203

5/8 8 150-205 204-227

3/4 8 220-300 299-406

7/8 8 360-480 489-650

10 8 540-730 733-989

Table 4

Figure 20

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