Operator's Manual

12.Decreasethediggingchainspeedandlookatthe
tachometer.
Note:Iftheenginespeedincreases,pushthe
utility-tractionleverforwarduntiltheenginespeedis
thesamethatinstep11.Repeatthissteptoobtain
thebesttrenchingspeed.
Note:Somehardsoilconditionswillallowyoutodig
atrenchfasterbyreducingthechainspeed.
WARNING
Operatingatrencherattachmentwithouta
restraintbaroracrumbercouldseverelyinjure
orkillyouifthechainbreaks.
Donotoperateatrencherattachmentwithout
arestraintbar.
Note:Thetrencheroperatesbestwhentheengineis
atfullthrottle.Adjustthegroundspeedtokeepfrom
luggingtheengine.
Important:Allsteeringshouldbegradual.Donot
makesharpturnswiththeboomintheground.
Markingsharpturnswhilediggingwiththe
trencherwilldamagethetrencher.
Note:Checkthechaintensionwhenyouarestarting
anewtrenchineachlocation;refertoCheckingthe
ChainTension(page23).
CuttingaCurvedTrench
Important:Donotmakesharpturnswiththeboomin
theground.Markingsharpturnswhilediggingwiththe
trencherwilldamagethetrencher.
Youcanmakeagradualcurvebyusingtherear-wheelsteering
controlonlyasneededtoslightlyarticulatethemachine.Do
notmakesteeringcorrections,asthiswillswingtheboom
intothesideofthetrenchandundercutit.
StraighteningaCrookedTrench
Asthetrencherisdigging,itmayvaryslightlyfromastraight
line;thiscanoccurifyouarediggingtooquicklyforthesoil
conditions.Tostraightenthetrench,raisetheboom,reverse
thegroundtravelandmovethetrencherforwarduntilthe
diggingchainclearsthetrench.Correctthealignmentofthe
trenchertothetrenchandlowertheboom.
FinishingtheTrench
1.Whenyoucompletethetrench,stopthemachine.
2.Slowlyraisetheboomuntilitisoutofthetrenchabout
15cm(6inches).
3.Movetheattachmentgroundspeedcontrollevertothe
Neutral(disengaged)positiontostopthediggingchain.
4.PulltheattachmentliftleverbacktotheRaiseposition
untiltheboomisintheTransportposition.
5.MovethethrottletotheIdleposition,stoptheengine,
andremovethekey.
OperatingTips
•Cleantheareaoftrash,branches,androcksbefore
trenchingtopreventdamagingtheequipment.
•Alwaysselecttheshortestboom,thelightestchain,and
thelightestteethtohandlethejob.Inharddigging
conditions,selectahightensile-strengthchain,arock
boom,andananti-backexchainwithrockandfrost
teeth.
•Alwaysbegintrenchingwiththeslowestgroundspeed
possible.Increasethetrenchingspeedifconditions
permit.Ifthechainspeedslowsdown,reducetheground
speedtokeepthechainmovingatitsfastestrate.Donot
spinthewheelswhiletrenching.
•Alwaysusefullthrottle(maximumenginespeed)when
trenching.
•Alwaystrenchwhilethemachineismovingintheforward
direction.
•Trenchwiththechainata45-to60-degreeanglefor
bestresults.
•Youcandigatrenchfasterbycontrollingthedepthand
adjustingtheboomperiodically.
•Ifthetrencherbindsinthesoil,reversethechain
direction.Oncethechainisloose,changechaindirections
andcontinuetrenching.
•Ifyouneedthenishedtrenchtobecleanerthanwhatis
possiblewiththetrencher,youcanpurchaseacrumber
fromanAuthorizedToroServiceDealer.Thecrumber,
whichmountsontotherestraintbar,scrapesthetrench
cleanasyoudig.
•Ifthediggingspeedofthetrencheristooslowortoo
fast,adjustit.
•Usethecorrectchainforthegroundconditions;referto
SelectingtheProperChain(page16).
•Toobtainmaximumdiggingefciencyfromthetrencher,
alwayskeepgoodsharpteethatthenecessaryspaces.As
teethbecomeworn,replacethemimmediately.
•Somegroundconditionsmayrequireafasterchainspeed.
Movethechainspeedcontrolfurtherforwardfromthe
Neutralposition.Youcanreducethelifeofthedigging
chainbyusingitathigherchainspeedsforanextended
time.
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