Tm 5-216 Armored Vehicle Launched Bridge

7/30/2019 Tm 5-216 Armored Vehicle Launched Bridge

1/93

YTECHNICALMANUAL

NT

A

MENTOFTHEARMY

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MY

tember1961

CHEDBRIDGEf/^j^

N

UNCHEDBRIDGE

mployment

election

nt

edBridge

omponents

eration

pabilities

ng

outtheTransport-

tation

idgeWithout

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mationandguidanceforcom-

dunitpersonnelintheuse ofthearmored

AVLB).

armoredvehiclelaunchedbridge,its

nsportation,operationalcharacteristics,

esinformationonwhichunitsareau-

clelaunchedbridge.Thematerialpre-

ewithoutmodificationtobothnuclearand

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CHEDBRIDGE

ERS,

MYJ

January1965

61,ischangedas follows:

appropriateengineerunits.TheAVLB

onjunctionwiththe24-tonpneumaticfloats

adwayfloatingbridgesettoconstructan

ssingoperations.

alve.Althoughthescissor* * * ofthe

stemofthelauncherisequippedwitha

lveisset intheM-48launcherto limitthe

psiand intheM-60launcherto3,800 psi.The

cingthepressure.

nsportingLauncher

ortingLauncher

csoftheM-60launcher(fig.1.1)areas

01b

n.

.

aloneisapproximatelyaclass43vehicle;

s approximatelyclass58.

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ransportinglauncherwithbridgeintravelposition.

nsportingLauncherComponents

uncherComponents

nentsarebasicallythesameastheM48

ceptasnotedanddiscussedbelow.

urementsofAVLBtransportinglaunchers

dlaunchingmechanismmountedonanM-

.1and25.1).Themanualfor careandmainte-

TM9-2350-215.Another,TM5-5420-202,

ntenanceofthelaunchingmechanismas

sis.TheM-60launchermodificationdiffers

auncherinthemountingof theoverhead

heM-60launcher,therod endofthe

otsupportweldedtothetop ofthetankhull

ellcover.Thecapendofthe cylinderispinned

fig.27.1).This mountingisthereverseof

derposition.TheM-60overheadcylinder

e oneusedontheM-48 launcher.

auncherwithmechanisminfoldedposition.

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launchermechanisminloweredposition.

unchingmechanismwasredesignedwhen

sis.WiththeM-48 launcher,thebridgewas

ntalbytheswingcylinderandboomswing

ointofthe tonguecylinder.OntheM-60

andswingcylinderwereeliminated.The

belowthe horizontalisretainedbysimply

tonguecylinderasneeded.Otherrevisions

fig.27.1)were minoranddidnotchangethe

csofthelauncher.

hingmechanismtongue(fig.28.1)differs

attworelease(ejection)cylindersarein-

nguecomparedwithonlyonein theM-48.

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CROSSPIN

NGUEPINTLES

TRIGGER

TASSEMBLY

-RELEASECOUPLINGS

E)

launchingmechanism.

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pin

ers5Lockingplug

nguecylinder

launchingtongue.

owerSystem

similarto theM-48powersystemexcept

ndthereservoircapacity.

M-60controlassembly(fig.31.1)differs

mbly(fig.31)in thattheswingcylindercon-

ereare onlyfivevalvesarrangedfromleft

ejection),locking,scissor,tongue,andover-

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controls.

eM-60hydraulicreservoirhasacapacity

ns.

uldbefilledonlyto the45-gallonlevel

e launchingmechanisminthetravelposition.

hingbyM-48Launcher

auncher

heM-60launcheristhesameas launching

ra.15)exceptthatthe enginespeedmustbe

the properfluidflowratesandoperations

ylinderareeliminatedwiththe M-60launcher.

vingbyM-48Launcher

auncher

hboththeM-48andM-60launchersare

perationsinvolvingtheM-48swing cylinder

60launcher.

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ofthe Army:

my,

esArmy,

asactiveArmyexceptallowanceisone(1) copy

myexceptallowanceisone(1)copytoeachunit.

ationsused,seeAR320-50.

gOffice:1965750591

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CHEDBRIDGE

DEMPLOYMENT

chedbridgeisorganictodivisional

hanairbornedivisions.Eachbattalion

equipeachlauncherwithone,andto

ent.Otherallocationmaybemadeat

uired.

chedbridgeisusedto crossshortgaps

withminimumexposureofbridging

s crewserved,highlymobile,and

sothatthecrossingof forwardcombat

pidly.Thegapsto becrossedmayconsist

raters,streams,canals,railroadcuts,

uentlyfoundinthecombatzone.Rapid

sbyarmoredvehicleshelpsmaintainthe

Althoughthearmoredvehiclelaunched

assault bridgeforoffensiveoperations,

endlyforcestocrossobstaclesin

etrogrademovements.Theretrieving

etotheenemy.Thebridgewill beleft

aslongasactuallyrequired.It maybe

crossingofunitsfollowingtheassault

tesforsubsequentlogisticalor other

event,anotherassaultbridgeis

edonthelauncher.Thelauncherthen

ultunit.Anassault bridgewhichhas

stheresponsibilityofthe corpsorarmy

stowhetheranassaultbridge isleftin

gforcecommander,whonormally

oncommanderandthedivisionengineer.

ngestransferofresponsibilitywith

s.

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teSelection

he bridgemaybeneededisdeter-

rements.Ifpossible,agroundrecon-

te toseeifthe armoredvehiclelaunched

etheobstacle.Thebridgecanbeem-

epreparation;priorreconnaissanceis

ystudiesofmaps,aerial photographs,

egardlessofwhatinformationisavail-

whereandwhenthe armoredvehicle

edrests withthecombatforcecom-

gineercommandermustbeready to

ommanderinthisdecision,sinceheis

esandlimitationsofthe equipment.

FEQUIPMENT

hedBridge

dgewhichisdesignedtobe trans-

ievedbyamodifiedturretlesstank(fig.

spanandistransportedontop ofthe

nchingmechanismandcarryingrack.

bridgeofaluminumalloy,andmaybe

meitherend.

uippedwith thehydraulicscissoring

eavierthantheother half;inthis

ringhalfwillbereferredtoas thenear-

erhalfas thefar-shoresection.The

tmaintreadwaysectionstogetherwith

ragms,andpins.Itsnominallength

tsfoldedconditionis 31feet6inches.

etlong.

ponentsarelistedin tableIwith

quantityrequired.Foridentification

erandnomenclatureofeachcomponent

temasshownin figure2.Theassem-

imately15V2tons.

ts

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tsContinued

rpanel)42%in.Lg.,6T^in.

panel)42%in.Lg.,5%in.

panel)42%in.Lg.,5%in.

oring

y

(centerpanel)

g

in.Lg

erLifting

bly

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rkingstampedoncurb.

ttachedto theinnergirders

erpanelsare10 feetinlength,

enterofpins,andweigh ap-

s.

econnectors.3Clipangles.

ectors.

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efour taperedramppanelsare

ptfortypeof endconnectors

or bracesanddiaphragms.A

ngthebridgeto thelaunching

heinnersteelgirder ofeach

gcontainsthematingcross-

rosspin. Curbs4incheshigh

edgefortheentirelengthof

olted ontheinsidetopflanges

e taperedportion.Bridge

sarerivetedtotheinnergirder

thelauncherduringtransit.

htwolifting barswhichare

catedsothat thepanelmay

dslingandbebalancedforeasy

ttachingthecylinderbeam,

gthebracesand diaphragm

thepanels.Ramppanelsare

weighapproximately4,300

or.

achbridgehasone cylinderbeam

ntat thecenterforplacementofthe

Itisinstalledin ahorizontalposition

els.

ecablebeamis providedperbridge.

terassemblyina horizontalposition,

orforthescissoringcables.Ithas3frt-

enterforconnectingthecableequalizer

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eterholesarelocatedneartheopenedge

struts.

wolateralbracesareprovidedper

ble"X"bracesattachedtotheramp

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eofthe insidegirders.Pintleboltsare

n position.

ttransversebracesareprovidedto

eadways.Theyareinstalledin a

dtotheclip angleslocatedontheinside

ebraces(fig.8).Fourbraces

edtostabilize thetwocenter

erchangeable.

sversebrace.

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ebraces(fig.9).Twobraces25

orthe tworampassemblies.

sebracefromthe taperedend

sversebrace,25incheshigh.

ebraces(fig.10).Twobraces

sed intherampassemblies.

ebracefromthetaperedend.

nsversebrace,22%incheshigh.

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ackets(fig.11).Twoformedsteel

nderseatsareconnectedtothe center

ebelowthescissorcylinder.Theypro-

ecylinderwhenthecablesareslackand

ceswhenthecylinderrod isextended.

seatbrackets.

uadrantprovidesthelever arm

ebridge.Itreasemblesaquarter part

twogroovedrimsatthetop forposi-

es.Itis placedonthetwocenterhinge

nalcenterlineofthebridge) atthe

bytwoquadrantstruts.Coupling

senablethequadrantto beinstalled

assembled.Thequadrantweighsap-

er(fig.13).Thehydraulicscissor

othescissoringcableswhichunfoldthe

chesin diameter,6feet6incheslong,

14-inchstroke.Thecylindershownin

ately1,460pounds.

alve.Althoughthescissorcylinder

hetongueofthelaunchingmechanism

ebridge,itis presentedheretoexplain

der.Thehydraulicsystemofthe

masterrelief valvesetat3,500psi

nderreliefvalveset at3,400psi.The

ortheoperationofthe scissorcylinder

.When,andif,thepressure inthe

eds3,400psi,thecylinderreliefvalve

fluidfromthecylinderto returntothe

educingthepressure.

standthehighoperatingpressure,

ngpipeandmultiplewire-reinforced

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semblyatthefoldingjoint.

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ouplings.

malequick-releasecoupling.

nemale andonefemalequick-releasecoupling.

rewcouplings.

sedonthe bridge.

eswithequalizerplates.

fig.16).Toinsure equalloadsto

esareemployedatbothends.Double

closedsocket(cylinder)endanda

ocketend.

.Thetwoquadrantstruts included

oyedtostabilizethe quadrant.Theends

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connectedtothequadrantandthecable

.

(fig.18).Twolaunchingdiaphragms

ge.Fittingsareattachedto thetop

ccommodatethequick-releasecoupling

ocatedonthehorizontalcenterlineof

vethetonguepintlesonthe launching

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holesattheends ofeachplatearefor

ebridge.

olders.

hragm.

gecontainsthe necessarypins

e descriptionandnomenclatureof

ableII.

.Twotiedownchainsarefur-

rthe foldedbridgetothelauncherdur-

s fastenedtotheconnectionprovided

(foldedposition)andtheeyebar is

kbya hydraulicallycontrolledpin.

ainwiththebridgeafterlaunching.

ofComponents.Thecomponents

bove(exceptscissorcylinderrelief

areshowninfigures20 through23in

ontheassembledbridge.

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.

washer

dle

w/

ng.

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blyandhose.

race.

brace.

rshore.

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race.

esconnected.

cket.

brace.

ookingtowardthefarshore.

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brace.

tersectionlookingtowardthefarshore.

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brace.

cket.

gtowardthenear shore.

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iscurrentlyanM48tankmodifiedto

ievethe60-footbridgefromeitherend

rnotonly providesthemotivepower,

terweightduringlaunchingandretrieving

handlinga maximumofapproximately

hebridge, withoutanappreciablereduc-

peratedbyatwo-mancrew,itsphys-

ollows:

aloneisapproximatelyaclass48

ounteditis approximatelyclass60.

Components

senttransportinglauncherisan

ovingtheturretassemblyandcovering

plate.Anoverheadcylinderisat-

otmountonthe topfaceoftheplate.

omthetank topermittheinstallation

stem.Earlierthelaunchingmechanism

tankchassis(fig.24),butcurrent

vehicles.Technicalmanualsforcare

rriersareOrdnanceTM9-7012forthe

-7022forthe M48A2.TM5-5420-200

ntenanceofthelaunchingmechanism

modellaunchersand bridgeswillbe

cations.

-launchingmechanismisattached

cher(figs.24and25).

edfromthelauncherengine

rwhichdrivesapump to

heentirelaunchingmecha-

ally.

withtiedownmechanism(fig.

rdeckofthelauncherto sup-

gtransit.

epurposeoftheoverheadcylinder

werthe foldedbridgetoandfromthe

heverticalposition.Thecappedend

o thecoverplatepivotmountandthe

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uncher(M48C)(launchingmechanismin

ncher(launchingmechanisminloweredposition).

boomassembly.Withthepistonfully

mblybearsdirectlyagainstthehullof the

rrestsfirmlyon theground.Bothends

dwithrelief valvesandflowregulators

ol.

Theboommountassembly(2fig.

ullofthe vehicleandisanintegral

nishesthepivotaboutwhichtheboom

aunchingandretrievingoperations.

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nderwitharmorcovering.

ngrack.

LY

ANKHULL

hull.

hanismwithoutarmorplates.

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oomassembly(5,fig.27)is the

elaunchingsystemandispinnedto the

sa triangularsteeltubingframewhich

dcylinder.Theoutrigger(7, fig.27)

semblyandrests onthegroundduring

vingasafulcrumforthetotal unit.The

eelpad whichfurnishesapproximately

rea. Inlaunching,thebridgeisraised

dthe boomassemblyisrotatedfromthe

onuntilitstwo steelpadsbearfirmly

heoutriggerrestsonthe ground.After

ground,thelauncherisutilized asa

assemblyalsosupportstheboomswing

escribedinebelow.Protectionfrom

nts,andsmallarmsfireisaffordedthe

omassemblybysteelarmorplateswhich

.

Cylinder.Topermitlaunchingof

negativeanglebetweenthelongitudinal

d toprovideabetterangle forthe

ridge, aboomswingwithahydraulic

nthe boomassembly(3and6,fig.27).

stheoperatortoswingthetongue below

auncherby movingthepinnedendof

rodforwardandupward.This swing

uncheddownnegativeslopes.Theboom

pinconnections.Itisattachedtothe

pin connectionandisoperatedbya

tthebottompinconnection.Thethird

heboomswingtothetonguecylinder.

nderare equippedwithreliefvalves.

s.27and28) isthecomponentofthe

chconnectsthebridgetreadwaystothe

weredandraisedby thetonguecylinder

ngandoverheadcylinders.

aperedtonguepintles(1,fig.28)

e tongueandfitintomatching

ngdiaphragm.Inlaunching

eswiththecross pinsdescribed

ofthebridge.

lcrosspinis factoy-installedin

xtendingabout2% incheson

pinisheldin placebya

nthecenterof thepin.This

reliefvalvemanifold.The

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ction)cylinder.

ocketsandbrackets.

aunchingmechanism.

onguebypositioningthecross

kets.Thecross-pinsockets

der ofeachendsectionofthe

erpreventsthebridgefrom

ongue.Thiscylinderconsists

withacommoncaplocatedin

pistonsofthesecylindersex-

,causingthelockingplugs

eachsideof thetongueand

tsin thebridge.Thelocking

eforethebridge isliftedduring

erations.

easecouplingsocketsareattached

theend (3,fig.28).Thisposi-

nesfor thescissorcylinder

ouplingsocketsmustbemanu-

lingplugonthe launching

owever,theconnectionisdis-

henthelauncherbacksaway

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opingrelease(ejection)cylinder

dintheendofthe tongue.Its

chingmechanismwhenthe

thdrawnfromthelaunched

enthetonguepintles andis

gfaceis flushwiththeend

etracted.Whenactuated,the

dge-launchingdiaphragm,

dandfreeof thetongue.The

rcanbeusedtojettisonthe

cyafterthebridge hasbeen

position.

ig.29).Theprincipalcomponents

kareshowninfigure 26.Bridgeguides

attopositionthebridge properlyandpre-

.Thebridgeseat guidesmatewith

getopreventlateralshiftingofthe

ridge seatifthelockingplugsare not

eisseatedon therack,thetiedown

carryingrackbya pincontrolledbya

der.Whentheoverheadcylinderis

e,the holddowncylinderisactuated

hetiedownchains.

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edtobridgecarryingrack(topview).

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ttomvieic).

ehydrauliclaunchingsystemissup-

e.Thederivedmechanicalpoweris

ertrainwhereit isconvertedtohy-

ftercontrolledbya masterreliefvalve

operatingpressureinthesystem.The

wertakeoffadapter,universaljoint,

hassembly,andhydraulicpump.

(fig.30).Fordirecttransferof

eoffadapterisboltedto theengine.

eshaft whichmesheswiththecrank-

30).Aclutchassemblyis incorpo-

rcontrollingthederivedmechanical

sassemblyalsoservesas supportfor

0).Forconvertingmechanical

aconstantdisplacementfluidpumpis

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antspeedofapproximately1,250rpm,

onsper minuteatzeroinletpressure.

masterrelief valveinthepressureline.

evingoperationsthehydraulicpressure

tionsofbridge andlauncher;therefore

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opreventan overloadinthevarious

omponents.

1).Thecontrolassemblyisa sys-

eoperationofall hydrauliccylinders.

tothefluidpumpoutletline,consistsof a

4-wayvalves.Themasterrelief valve

essureinthesystembypermittingfluid

re connectedinserieswiththe

hetelescopingrelease(ejec-

nectedinparallelwiththe

mthedriver's compartmentby

ig.31).Fromleft torightthe

ows:Release(ejection),lock-

,andoverheadcylinder.These

edfor launchingandretriev-

y.Theymustbeheld-inposi-

edesiredoperations.When

urnto theneutralposition

atwhichacylinderoperates

controllever israisedor

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nedirectionandfreeflowin theopposite

TICSANDCAPABILITIES

chedbridgehasaclearspanof 60feet

feetEachtreadwaywidthisapproxi-

treadwaywillcrossaV^-tonvehicle.

waysisabout28 inches,butthegapat

mallvehiclescancrossonasingletread-

p. Byusingbothtreadways,larger

gtankscancross thebridge.Theout-

his12 feet6inches,andtheoverallwidth

urbsareprovidedontheouter edges

tvehiclesfromrunningoffthe bridge.

0feet,thebridge hasanormalcapacity

ofclass65,anda riskratingofclass

unchedbridgehastheapproximate

datais asfollows:

willclimb36"

ross102"

vot

0percent

dgein thetravelpositioniscapable

marchin bothadministrativeandtacti-

r,inplanningamarch,selectaroute

tetheincreasedweight(approximately

ndoverheadclearance(13-1")re-

hercombinationtopass.It isalso

treconnaissancevehicleprecedethe

t-upareasto assurethatnecessary

ntpowerforcross-countrytravel,and

hroughtreesor otherobstacles.Travel-

manydipsandgullies,thehigher

sethelauncherandbridgeto developa

sconditionbecomesevere,theoperator

he vehicle.Also,theaddedweightwill

yofthearmoredvehiclelaunchedbridge

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rshland.Anotherfactoris theincreased

uncherwiththebridgemounted.

chedandrecoveredonuphillgradesof

esof19percent,andtransversegrades

ncherlevel,muddysites donothinder

mustbetakenwhenlaunchingdowna

causthereis considerablenosingfor-

eforethe outriggertouchestheground.

tstheground,thelauncherhassufficient

etethelaunching.Becauseofthehigh

bridgeis intheverticalposition,launch-

eslopesof11percent.Attransverse

euppertrackstartstolift clearofthe

nkconditionsmust supportthe

videsufficientbearingtoallowthe

loadafterlaunching.

NDRETRIEVING

is accomplishedbythescissorcyl-

Whenthis cylinderisactuated,it

whicharepassedoverthe quadrantand

the bridge,swingingitinline withthe

tageoustoconnectthelaunchertothe

bearinghalf)ofthebridge,becausethis

eroperatingpressuresforlaunchingthe

thefoldedpositionontopof the

elauncherisdriventoa positionat

chthegroundabout 5feetfromthe

ectedbridgesite.Withtank brakes

pm,the powertakeoffclutchisengaged

rked"clutch"asfarasit willtravel.

opencentertype directionalcontrol

thehydraulicsystemandthepressure

ureuntil anoperatingvalveisopened.

besetat 1,250rpmtodeveloprequired

peratingrpm,theoverheadcylinder

launchingposition.Thisreleasesthe

dgewillstart toriseoffthe carrying

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ervalveisheldinthis positionuntilthe

pastthe verticalpositionandtheout-

und(fig.32). Atthispoint,thetank

ittingthetanktocrawlup firmlyagainst

eadcylindercontrolleverisreturnedto

ridge

eisacontinuousoperation.

oldsthebridgeas thetonguelowers

The scissorcontrolleverismovedtothe

d.Whenthebridgeopensapproxi-

ngcontrolleveris movedtothelaunch-

theswingcylinderisextended.Atthis

eris released.Thetonguecontrollever

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chingpositionandhelduntilthebridge is

thegap,andseatedonits abutments.The

dalongwiththeswing cylinderand/or

ybenecessaryforthe scissorcylinder

tlyratherthansteadily,in ordertokeep

slowas practicableandfullyopenatthe

uecylinderoperation.Thetongueshould

easilyifthe tonguecylindercontrolis

ntorelease theloadfromthetongue

mthe launcher,thelockingpinsare

ckingcontrollevertothe launchingposi-

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epressuregageindicates3,200psi.

thenreleased.Thepowertakeoff

hescissorcylinderleveris movedupand

relievethepressureinthescissor cyl-

bedoneorthescissor cylinderwill

quick-disconnectcouplingcanbeen-

ehicleisthenmovedawayfromthe

disengagefromthebridgeeasily,the

rwillhavetobeused.The procedure

ejection)cylinderisto firstengagethe

n,thelockingcontrolleverismovedto

held.Whenthelockingpins arere-

ngcontrolleverstill inthelaunching

tion)leverismovedtothe launching

l thelauncherisfreeofthe bridge.To

on)cylinderpiston,thelockingcontrol

ngpositionandtherelease(ejection)

e retrievingpositionuntiltherelease

cted.

obeoperatedwiththe release

ckingcylindercontrol,whichisheld

uringall releaseoperations.

tweentheejectionandlockingcylinders

fore,therelease(ejection)cylinderwill

entoperationalone,butmust beused

ckingcylinder.Inturn,thelocking

atetherelease(ejection)cylinder.

ndisengagedfromthebridge,the tongue

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45/93

sbackedaway.Assoonasthevehicle

anproceedacrossthebridge.Thebridge

minutesbyonlyonecrewmember,the

vethebridgefrom eitherthenear-

pendinguponthesituation.The quick-

ecleanedofallforeignmatter,and the

thebridgeinspectedbyadismounted

untedcrewmemberthendirectsthe

gnalsto theoperator.Asthelauncher

ridge,thelauncheroperatorengagesthe

aisesandlowersthetongueto matchthe

esin thelaunchingdiaphragm.With

he bridge,thelockingpinsareextended

trollevertothe retrievingpositionand

ressuregageindicates500psi.The

rmakesavisualinspectiontoinsurethat

tended.Thequickreleasecouplings

ally.Thisisaccomplishedbypullingfor-

ntopof thetongue,andinsertingthe

ugintothequick-releasecouplingsocket.

pushedback,lockingtheconnection.

aleconnectionshouldbeguidedto pre-

t.Foreasein attachingthequick-release

ouldrelieveallpressurein thelinesby

dercontrolvalve.Alightpullon the

ugsinsuresthattheplugsarecompletely

medisengaged.

k-releasecouplingscannotbeen-

indermustbebled. Therearehand

scissorcylinderforthispurpose.The

enoughtorelievethepressure.This

o engagethecouplingscanbeavoided

cissorcylindercontrollever tothe

onsafewtimes,withthe powertakeoff

forethebridgeisdisconnectedfromthe

movethetonguecontrollevertothe

bridgeis raised,andwhenthefar-

ely5or 6feetofftheabutment,the

vedtothe retrievingposition.During

vingoperation,thescissorcontrollever

tokeepthefar-shoreendas lowas


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guecylinderisfullyclosed,thetongue

dthe swingcontrolleverismovedtothe

duntilthe swingcylinderisfullyclosed.

sfully extended,thecontrolisreleased.

ppliedandtheoverheadcontrolleveris

sition.Partiallyreleasethebrakesdur-

eingtiltedbackfrom theverticalposi-

esthe ground.Theoverheadcylinder

erticalpositionandloadsiton thecarry-

nsarepinnedto thebridgebythedis-

heoperatorretractstheholddownplug

ontrollevertothe launchingpositionfor

edcrewmemberletstheoperatorknow

etracted.Hethen placestheholddown

nsocketandhas theoperatorextendthe

eoverheadcontrollevertothe retriev-

a wrench,thecrewmembertightens

oneortwoturnsmorethan hand-tight.

ducetoomuchtensioninthe chains.

sdisengagedandthecontrolleversare

dretrievingpositionstwoor threetimes

allhydrauliclines.Thebridgeis now

hetwo-mancrewcanretrievethe

napproximately10minutesto anhour,

satthesite.

chedbridgecanbelaunchedwithout

eslopelimitsatthe sitedonotexceed

ph13,sufficientoverheadclearanceis

theverticalposition,andnomechanical

mentisvulnerabletoenemyantitank

k,andthereforemustbeprovidedwith

practicableifthelaunchingistobe suc-

counteredinretrievingthebridgewhen

ineupwiththeholes inthelaunching

maybetheresultof thebridgebeing

afficor thefar-shoreendbeingata

ear-shoreend.Toretrievethe bridge

s,usethetongueofthe launcherasa

attachedtothe bridgediaphragmand

tles.Thenbyraising thetongue,the


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cribbingis placedunderthebridgeuntil

nto position.

onthecrosspinsocketscancause

separationof thecrosspinfromthe

thouttheTransportingLauncher

aunchedbridgeisleftin placebythe

ecoveredbyotherengineerunitswith

withouttheuseofa transporting

eersmayrecoverthebridgetoreconsti-

bridgingcapability,ornondivisional

rreturnto classIVstock.Conditions

assaultbridgewithoutprovidingother

alitemssuchasa panelbridge,cause-

ora fixedspanfromfloatingbridge

sa replacementifnecessary.Coordina-

assaultbridgeleftinplacewas dis-

hefollowingequipmentmustbe

unit:

roller ortimberskid,approxi-

10-footlengthsmaybeused

lable.

oma22-footlengthof%-inch

rope.Aneyereinforcedwith

hendofthewirerope, withthe

betweenthethimblesabout18

gs,FSN5420-276-9165.

bricatedfrom%-inchwire

attheapexand ahookon

lingshouldbeabout11 feet

k-mountedcranewithathree-

ngthsof6x 6timber.

COandsixmenincludingequip-

Thebridgeisremovedfromthegap

eddirectionwithadozer,tank,truck-

uitablevehicle.

nwhichthetowlinewill beat-

dona timberrollerorskid.


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ruckmountedcraneor bya7-

owninfigure33.

shoreend,ofbridgeto placeroller.

oundthe launchingdiaphragm

mberbetweenthewirerope

etheloadand protectthe

34).

peslingis fastenedtothedraw-

vehiclewiththelegshooked

figs.34and35).

ovedslowlyforward,dragging

thefarendof thebridge

e far-bank,thenearendofthe

bovetheground(fig.36).At

er orskidisplacedunder the

o preventthebridgefrom

s.36 and37).

rendof thebridgewilldropuntil

ablesis takenup(fig.38).

ndcablesholdthe farendof

eededabovethehingejoint

omagapwithverticlesides,such

spanofanexistingbridge,a

hefarendofthe bridgeduring

erectionslingis connected

arendofthebridge forlifting.


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owcabletobridge(lookingfromfar-shore).


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oreendofbridge duringrecovery.

ssthe gapasdescribedabove,

far endofthebridgeby lower-

the cables,untilthecenter

berskidor rolleronthenear

ablefromthecranehas been

haltedandthe craneisdiscon-

emovedtheoperationis re-

scompleted(figs.40and 41).

srecoveredotherthanwith

remustbeexercisedtoavoid


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completedfar-shoreendisclearofbank.

bridge'centerhingehaspassedovertimberskid.

quiredtoremovethebridgefroma

edfortransporting.Loadingthebridge

vehicleswillbe discussedinpara-


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cranesupportingthefarend ofthebridge.

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completionoperationishaltedtc

DTRANSPORTATION

emblethe bridgedependsonthestate

efor transporting.Asexamples,the

disassembledintoitscomponentpartsfor

ks,orit canbeseparatedlengthwise

ipment.Thepositionoftheassembled

re42.

ssembly,onemethodisto assemblethe

withthenear-shoreend.This means

ppanelstogetherwiththe diaphragm,

;next,pinthenear-shorecenterpanels

onandinstallthe centerpanelbraces.

nelstothe near-shorecenterpanelsat

thebracesinthefar-shorecenterpanel.

ectionisassembledandconnectedto

ontocompletethebridge.Thismethod

netoworkwith smallsectionsofbridge,

etailinparagraph21.


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onoftreaduxiysanderectioncribbing.

t hasbeenseparatedlengthwise,a

wed.Onemethodistoplaceone-halfthe

shoreandfar-shoresections,onthe"site,

ms.Theremaininghalfofthebridge is

sidethefirsthalf.Using acrane,the

handconnectedtothediaphragmson

Thiswillestablishthe alinementbe-

orinstallingthebracesand beams.The

ateitherendto installthebracesand

hebridge atvariouspointsforfinal

.Thisprocedurehasthedisadvantage

dlelargeandunwieldysectionsofbridge.

anbeassembledfromeitherend.

herewillbethatof assemblingthenear-

ysiteof sufficientareaisselectedto

rtingvehiclesandcrane,andto permit

waysectionsduringunloadingandposi-

tyconsistsofanNCOin charge,acrane


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blesubstitute isnecessarytoas-

rincipalcomponentsaretoo

ling.

tionslings(FSN5420-276-

stbe suppliedbytheunitas-

tituteslingsof%-inchwire

achleg toengagethelifting

onmaybeused.

sof6x 6timberapproximately

,butsuitablesubstitutesmaybe

arenot available.

essarysledges,crowbars,

toolsmustbesuppliedbythe

.

eEnd.

are placedonthegroundas

aleramppanel(1,fig.43)is

ribtimbers,andamale ramp

ontherightpair (fig.44).

gm(3,fig.43)is boltedtooneof

ntle holesfacingthetapered

equick-releasecouplingbrack-

condramppanelismoved

nserted initsclipangle and

(6,fig.43)is installedbe-

hthecylinderpivot mount

peredendandbolted intoposi-

els arenowalinedsothat

canbeboltedtothe bottom

and thefirstramppanel

3)canbe installedandbolted

adedpintles onthetransverse

theholesinthe clipangles;

ther sideoftheclipangle and

oppositeside.Thesecondramp

fig.43)is setinpositionwith

ceat thetopasshownin figure

dtotheclipangle untilthe

nstalled.Thisarrangement

rtobepinned easilytothe

eris placedabout9feetinfront

adwayoftheassembledend

flexiblehydraulichoseiscon-


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M

ATECYLINDER

SVERSEBRACE

ERSE

ERSE

ATBRACKET

IONSPERMANENTLYBOLTEDTOEACHSECTIONUSED

SHOWNONSKETCH.

geshowingstructuraland scissoringcomponents.

ein eachramppanelasshown

terpanel(13,fig.43)is placed

out1footdistancebetweenend

dcenterpanels.Theflexible

hehydraulicline inthecenter

draulicline isconnected,

nto theramppanelsothatthe

nbepinnedwithfourpanel

ecenterpanel (14,fig.43)

timberandconnectedasde-

orcylinderseatbracket(17,

onbetweenthecenterpanels

ig.43)is liftedbyacrane

enthetreadwaysandpinned


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ppanelovercribbing.

3) withtherodrestingon

werhalfofthe cylinderseat

aneltransversebrace(7, fig.43)

osition.Thetophalf ofthe

ketisinstalled,andtwocenter

0,fig.43)arebolted intoposi-

fthebridge isnowcomplete.

End.

n frontofthecompletedhalfof

c(3)above.Amalefar-shore

placedonthelefttimberand

herightwithabout1 footof

connectorsofthenear-andfar-


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59/93

nsversebracesinposition.

exiblehoseis placedthroughthe

paneland connectedtothe

adway(fig.55).Figure56

ssemblycompletelyinstalled

he hydraulicconnectionsatthe

enterpanelsareconnectedto

ridge withtwocenterpanel


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nnectedtohydrauliclineinramp panel.

rpanellinedup withflexiblehosereadytobe

eincenterpanel.


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ns.

anthingepins.The twocen-

nonthe rightinfigure57 are

fittingsandareusedon the

thebottomofthe hingejoint.

ownonthe leftinfigure57

gsandareinstalledon the

hatthehole forthequadrant

readwaysections(fig.58).

semblyiscompletedbythein-

neltransversebraces.

sareplacedinline withthe

etosupportthefar-shoreend

blyisformedbyplacinga male

dafemaleramppanelon the

withthetaperedendsfacing

ngdiaphragmisinstalledand

amp paneltransversebraces

eend assemblyisplaced

shorecenterpanels,andthe

ed.

mblyislifted andpositionedwith

mblysothatonlythe topfour

fig.59). Afterthefourtop

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64/93

pinnedtothecylinderbeam.

hecribbingundertheendas-

eassemblyis loweredcausing

orstoswingin lineforpinning.

Components.

cedonseatsprovidedontheinside

ertreadwaysections(1,fig.

cablebeamfacesthescissor

nnedat thistime,butafter

alled.Thisis toallowmove-

econnectingofthequadrant

n positiononthetwocenterhinge

near-shoreendofthebridge

couplinghingesonthequad-

uadrantlockingpinis in-

fromthelongitudinalcenter-

(fig.63).Anadditionalquad-

throughtheholesopposite

ngthroughthecenterhinge

as showninfigure63.Thesec-

centerhingepininplace.

ositionedandpinnedto the

Afterthequadrantstrutsare

beamis boltedtotheseatspro-

ofthefar-shorecentersection.


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erpanelsbeingpositionedforinstallation.

oseassemblyreadytobe connectedtohydraulic


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ngejointhydraulicconnectioncompleted.

assemblyinstalledatthehinge joint.


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ubricationfittings.

pininstalled.


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horeendassembly.

ablescanbeinstalled,the scissor

d.Thisisaccomplishedbyfirst

raulicsystem(fig.64).Four

exiblehydraulichose,equipped

areinstalledontheendsof the

64.Theplugendof eachhose

asecouplingbracket.This

he fittingontopofthe launch-

hequick-releaseplughoseson

ecrossed,andthe hosesonthe

,thehydraulicline tothe

nterlineis connectedtothe

ylinder,andthe linetotheleft

ofthecylinder.Theremain-

areshowninfigure64.

bridgehydraulicsystem,the

aneuveredintopositiontopick

csystemofthe bridgeiscon-

stemofthelauncherin the

graph16.Thepowertakeoff

cissorcylinderrod isextended.

blesequippedwiththedouble

edtothescissorcylinderrod;

throughgroovedrims ofthe

qualizerplateis connectedto

pletestheassemblyofthe


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mponents.

einstalledon thebridge,anda

surethatall pinsandcon-


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antbetweentreadways.

ethelauncherbeginstoretrieve

mateweightsofthemajorcom-

statedinparagraph7.It canbeseen

disassembledconditionscouldbetrans-

centertreadwaysectionsareapproxi-

e endtreadwaysectionsareabout21

nualwill describeloadingandtrans-

lesof sufficientcapacitythatareavail-

sequipment.Twomethodsoftrans-

thelauncherwill bediscussed;however,

dditionalmethodstofit theirparticular

eTrucks.

efor transportationbytwo5-ton

bridgeis dividedatthemid-


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tionforlocking.

consistsofmaleandfemale

malecenterpanels,twocenter

woramppaneltransverse

chingdiaphragm,cylinder

ssoringcables,erectiontools,

ngforone-halfofthebridge.

sendsections,maleandfemale

malecenterpanels,twocenter

woramppanelbraces,lateral

gm,cablebeam,twoquadrant

essarypinsandcribbing.

eachtruckis essentiallythe

ctionsareloadedoneachside

sectionsstandingontheout-

peredendsofthe sections

ndof thetruckbedwiththe

terofthetruck.

enplacedat theforwardendof

onresting ontheuncurbed


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ngpininstallation.

pereddeckoforeofthe end

cylindermaybe placedbetween

secondendsection.Necessary

dto stabilizetheseitemsto

ansit.

nlaid longitudinallyonthere-

onofthetruckbed,andthe

acedonthecribbing,resting

.

beplacedonthe steelcurbofone

ouldbe donecarefullyso

kedinanyway.

nents(braces,diaphragms,etc.)

dethetread waysections(fig.

acedacrossthetopof the

g.


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ycrewanderectionequipment

thebridgecanbe dismantled

trucksinapproximately1%

dandassembledin about\y%

ngbyUsing25-TonSemitrailer.

edandtransportedfullyas-

railer(fig.66). Thebridge

edfromthe trailerbyusing

boundtogetherby puttinga

tubesat theendoftheramps

dgefromopeningduringload-

ons.Therearwheelsof the

lowditchordepressionabout

whenit touchestheground,


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PLINGBRACKETS

LEXIBLEHYDRAULICHOSE3'4"LONG

FLEXIBLEHYDRAULICHOSE4'6"LONG

LEXIBLEHYDRAULICHOSE2'8"LONG

LEXIBLEHYDRAULICHOSE10'LONG

WNBYCALLOUTSTOBEINSTALLEDDURING

ECTIONSFACTORY-INSTALLED

ngbridgehydraulicsystem.

sitionedonthetrailer bedas

ridge mountedismovedinto

trailer.Thebridgeis then

yusing theoverheadand

elauncherisdisconnected

malmannerandtheloadis

adbinders.

herandtheoperatorofthetrailer

ge inabout20to 30minutes;

oadingmustbedoneverycare-

ersonnelordamagetothe

bythis methodisasmobileas

nsionandweightnormally

trailer.

eBridgeWithoutALauncher

eredbymeansotherthanbya

aragraph19,itcan befoldedand

ilerby a20-tontruck-mountedcrane.

andtowlineusedto removethe

coverycrewwillneed twotaglines,crib

x4'),andtwo6" x8"woodblocks1foot

tthe scissorcylinder.


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n25-tonsemitrailer.

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76/93

stiedtogether.

lows:

isconnectedatthe jointsbe-

nelsatthe endofthebridge

cissorcylinder.

pins betweentheserampand

d,andtheendassemblycom-

nd setaside(fig.69).

e rodendofthe scissorcylinder

eand setaside.Thehoseto


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n25-tonsemitrailer(schematic).

erisdisconnectedfromthe

and connectedtotherodend

figure70.Thispermitsthe

romtherod endofthecyl-

thebridgeisfolded.These

uick-disconnectsocketsateach

otrequiredfor thisprocedure.

ssemblyfromthebridge.

locksarewedgedbetweenthe

dersto supportthecylinder


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78/93

arrangement.(RemovehoseA,disconnect

ngat C.)

operation.Theseblocksare

dtothecylinderas shownin

sclosetothebridgeas possible.

placedaroundthebottomcon-

ntas showninfigure72.

ed"upsidedown,"employing'the

3 and74.Theoperationis

standingonitsedge,toreposi-

thebridgeaspossible.Thisis

tyof thecranewhenlowering

s placedthroughthepinholes

),and thecentersectionof

yingthecrane(fig. 76).As

rcylinderpistonrod isex-

uidin therodendofthe cylin-

apend.

ainingendassemblyintoposition

dedportionof thebridge(fig.

tweentherampandcenter

ndthehosesatthescissor cyl-

normalpositions.Thiscom-

n.


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completebridgeona25-tonsemi-

edbridgeusingthesling arrange-

he 18-footlengthofwirerope

daroundbothlaunchingdia-

geerectionslingsare placed

weentherampandcenterpanels.

reropeslingishookedto the

eandthe connectingringsof

fig.78).


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supportinposition.

6"x4')are placedonthetrailer

Twotimbersmustbeplaced

erto preventthebridgefrom

curbs.

getoasufficientheightto permit

nderneath(fig.79).Taglines

fthe bridgetohelpin position-

er.Thebridgeis loweredonto


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entfor"turning-over"operation.

eloadissecuredwithchains

foldandload thebridgeusingthe

ximately1hour.

loadedfromthetrailerby

be boundtogetherasdescribed


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operationstarted.


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ge.


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ftheendassembly.


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entforliftingthe bridge.


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tedStatesArmyTerms

andBrevityCodes

Classification

rs

rBattalion

yandAirborneDivi-

sionBattleGroups

Units

edUnits

CombatCommand

ruction

.

ll-Tracked,CombatTank,M48,

OrganizationalMaintenanceMan-

acked,90-mmGun,

nceManual,ArmoredVehicleLaunched

yPamphlets(DAPam).

myMotionPictures,FilmStrips,

ngs

ministrativePublications(Army

ulations,Department

eneralOrders,Bul-


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ningPublications;FieldManuals,

CorpsManuals,

rainingPrograms

Programs,Army

TrainingTests,War

entoftheArmy

andTrajectory

hnicalManuals,TechnicalBulletins,

onOrders,and


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nd:

nder:

16c

betweenrampandcenterpanels21c(3)

satthehingejoint21d(2)


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49,55

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16

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iler:

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ationsused,seeAR320-50.

TINGOFFICE:1961S105I3


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/access

_use#pd-g

oogle

Tm 5-216 Armored Vehicle Launched Bridge

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