Operator's Manual

Figure27
1.Crumberbar(optional)
5.Whentheenginehasreachedtheoperating
temperature,movethemachinetotheworkareaand
positionthemachinetocutthetrench.
Note:Ensurethattheendofthetrencherboomis
severalfeetbeyondthestartingpointofthetrench.
6.Alignthemachinetothecenterlineofthenewtrench.
7.AdjusttheenginespeedtotheFullthrottleposition,
andlowertheboomtojustabovetheground.
8.Startthediggingchainbymovingtherearattachment
controllevertowardthefrontofthemachine.
Note:Youmustbeseatedintheoperatorseatbefore
movingthemachine;otherwise,theenginestopsin
1second.
Note:Thecrumber(ifequipped)automaticallymoves
fromtheTRANSPORTpositionintotheOPERATING
positionwhenthetrencherattachmentreachesthe
maximumdigdepth.
9.Movetheutility-tractionleverforwarduntilthe
machinestartstomoveforward.
10.Lowertheboomintotheground.
11.Whenthediggingchainisloweredtothedesireddepth,
movetheutility-tractionleverforwarduntiltheengine
speeddecreasesabout10%(200to300rpm).
Note:Rememberthatspeedonthetachometer.
12.Decreasethediggingchainspeedandlookatthe
tachometer.
Note:Iftheenginespeedincreases,pushthe
utility-tractionleverforwarduntiltheenginespeedis
thesamethatinstep11.Repeatthissteptoobtain
thebesttrenchingspeed.
Note:Somehardsoilconditionsallowyoutodiga
trenchfasterbyreducingthechainspeed.
WARNING
Operatingatrencherattachmentwithouta
restraintbaroracrumbercouldresultinserver
personalinjuryordeathifthechainbreaks.
Donotoperateatrencherattachmentwithout
arestraintbar.
Note:Thetrencheroperatesbestwhentheengineis
atfullthrottle.Adjustthegroundspeedtokeepfrom
luggingtheengine.
Important:Allsteeringshouldbegradual.Donot
makesharpturnswiththeboomintheground.
Markingsharpturnswhilediggingwiththe
trencherwilldamagethetrencher.
Note:Checkthechaintensionwhenyouarestarting
anewtrenchineachlocation;refertoCheckingthe
ChainTension(page18).
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)positiontostopthedigging
chain.
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