Case 570T - Trenching

6-WORKINGOPERATIONS
Trenching
Trenchingisthebasicbackhoeexcavatingoperation.
Otherdiggingoperationsaremerelyvariationsofthis
basicfunction(llingthebucket,dumpingthebucket
andmovingthemachineforward).Whiletrenching,it
isgenerallyimportanttomaintainaleveltrenchbottom.
Thisisaccomplishedbysettingthebucketatthecorrect
angleofapproach.
Pullonthedipperlever(1)tomaintainthecorrectcutting
angleasthebucketiscrowdinginapplyinglightpressure
totheright.
Atthesametime,pullontheliftlever(2)torelievedown
pressureandkeepthebucketinthesameplane.
Continuethetrenchbymovingforward.Movingtoofarwill
requireexcessivedownpressurefordigging,plushand
clean-upofthetrenchbottom.Itisbettertomovealesser
amountthantomovetoofar.
PTIL14TLB0035AB1
However,ifthisisnotpracticable,usetheloaderorback-
hoeattachmenttocutalevelsurfaceintotheslopefor
theuphillwheelandstabilizer,anddepositthespoilfrom
theslotontothedownhillsidefortheoppositewheeland
stabilizer.Whendiggingalwaysdepositthespoilfromthe
trenchontheuphillside.
NOTICE:Whenexcavatingacrossaslopeitisnotpossi-
bletomakeuseoftheloaderbucketforaddedstability.
Donotoverloadthebucketandavoidswingingaloaded
buckettothedownhillsideoftheslope.
PTIL12TLB0159AB2
Tonishthefarwallonastraight-walledexcavationcrowd
outthebucketwhileforcingthebucketdowntheexcava-
tionfromtheboom.
PTIL14TLB0036AB3
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