Toro 4045 - Page 54

Giventheaboveinformation,youcancalculatethenumberof
rodsrequiredtoreachyourbeginningpointattheappropriate
depth.Tororecommendsthatyoustarttheentrypointthe
samedistancebackfromyourbeginning-at-depthpointas
thelengthofpipesyouwillneedtoreachthatpoint.Thiswill
ensurethatyouhaveenoughextraspacesoyouwillnotneed
toover-steeranddamagethepipes.
Thefollowingexampleillustratestheprocessgivenan
installationusingthemaximumentrypitchofthemachine
(26%)onlevelground:
•Inserttherst3m(10ft)ofdrillbit/pipeintotheground
withnosteering.Theendofthedrillbitwillbe76cm
(30inches)deep(Figure52).
Figure55
1.26%pitch4.185cm(73inches)7.14.7m(45ft)
2.76cm(30inches)5.203cm(80inches)
3.142cm(56inches)6.208cm(82inches)
•Beginsteeringupforthenext3m(10ft),pushingthe
pipesinatthemaximumpitchchangeof8%.Thisresults
inachangeofpitchfrom26%atthebeginningofthe3m
(10ft)to18%attheendofthe3m(10ft)foranaverage
pitchof22%.Giventhat,thedrillheadlowersanother66
cm(26inches)andisnow142cm(56inches)deep.
•Continuingsteeringupforthenext3m(10ft)atan8%
pitchchange,yourpitchwillchangefrom18%to10%
foranaveragepitchof14%.Giventhat,thedrillhead
lowersanother43cm(17inches)andisnow185cm(73
inches)deep.
•Continuingsteeringupforthenext3m(10ft)atan8%
pitchchange,yourpitchwillchangefrom10%to2%for
anaveragepitchof6%.Giventhat,thedrillheadlowers
another18cm(7inches)andisnow203cm(80inches)
deep.
•Levelingthedrillheadfrom2%to0%takeslessthan1.5
m(5ft)moreforanaldepthof208cm(82inches).
Reachingthisnalpointtook4-1/2pipes3m(10ft)
long.Soforthisexample,yourentrypointshouldbe14.7
m(45ft)backfromthebeginning-at-depthpointofyour
installation.
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