Operator's Manual

6.Measurethedistancebetweenthechainandthebottom
ofthelowerwearstrip(Figure31).
•Ifthegapbetweenthelowerwearstripandthe
chainis51to76mm(2to3inch),thechaintension
iscorrect(Figure31).
•Ifthegapissmallerthat51mm(2inch),thechain
tensiontootight;refertoDecreasingtheChain
Tension(page19).
•Ifthegapislargerthat76mm(3inch),thechain
tensiontooloose;refertoIncreasingtheChain
Tension(page20).
Note:Thechaintensionhasasignicantaffecton
theproductivityofthemachine;setthechaintension
aslooseaspossible.
DecreasingtheChainTension
WARNING
Ifyouremovethegreasettingfromtheboom
beforeyoureleasethepressureinthesystem,
personalinjurymayresult.
Beforeremovingthegreasetting,loosen(butdo
notremove)theplugontheoppositesideofthe
boom.
1.Attheleftsideoftheboom,loosenthe4boltsthat
securethelockbarsandthesideplates(Figure32).
Figure32
1.Bolt
3.Sideplate
2.Lockbars
2.Locatethebleedplug(hex-socket)atthesideplateon
therightsideoftheboom(Figure33).
Figure33
1.Bleedplug
3.Slowlyrotatethebleedplugcounterclockwise2or3
revolutions,andallowthegreasetoowfromaround
theplug(Figure33).
Note:Thechaintensionwilldecreaseasthegap
betweenthechainandthewearstripincreases.
4.Whenyouachievea51to76mm(2to3inch)gap
betweenthechainandthewearstrip,tightentheplug
(Figure32andFigure33).
5.Torquethe4bolts(Figure32)thatsecurethelockbars
andthesideplatesto190to215N-m(140to159ft-lb).
6.PerformthestepsinCheckingtheChainTension(page
18).
19