Toro TRX-15 - Replacing the Drive Sprocket

B.Loosenthejamnutontheadjustingboltinthe
boom.
C.Loosentheadjustingboltuntilyoucanremove
thechainfromtheboom
D.Removethechainfromthedrivesprocket.
E.Ifthechainneedsreplacing,removetheboltand
nutsecuringthespoilsaugerandremovethe
augerandchain.
F.Removetheboom,ipitoversothebottom
becomesthetop(orifyouhavealreadyippedit
once,replaceit),andinstalltheboomagain.
G.Replacethenuts,bolts,andwasherssecuringthe
boom.
H.Ifinstallinganewchain,connectthelinksby
pressingorhammeringtheclevispinsupplied
withthechainthroughthelinks,thensecurethe
clevispinwiththecotterpinsuppliedwiththe
chain.
Important:Toavoidbendingthechain
links,placeblocksunderandbetween
thelinkswhenhammeringtheclevispin
through.
I.Installthechainoverthedrivesprocketandfront
roller.
J.Ifyouremovedthespoilsauger,installitusing
theboltandnutyouremovedpreviously.Torque
theboltandnutto75ft-lb(102N-m).
K.Skiptostep4tocompletetheadjustment.
2.Loosenthe2boltsandnutssecuringtheboomto
thetrencherarm
3.Loosenthejamnutsecuringtheadjustmentbolt.
4.Turntheadjustmentboltinoroutasneededto
achievethedesiredtension.
5.Tightenthejamnut.
6.Torquethe2boltsandnutssecuringtheboomto
135to165ft-lb(183to223N-m).
ReplacingtheDriveSprocket
Overtime,thedrivesprocketwillwear,especiallywhen
usedinsandyorclaysoils.Whenthishappens,the
diggingchainwillbegintoslip.Ifthechainslips,replace
thedrivesprocket,asfollows:
1.Raisethetrencherafewinchesabovetheground.
2.Stoptheengineandremovethekey.
3.Removethespoilsauger(Figure61).
Figure61
1.Spoilsauger
2.Bolts
3.Drivesprocket
4.Sprocketmountingsurface
4.Loosenthe2boltsandnutssecuringtheboomto
thetrencherarm.
5.Loosenthejamnutontheadjustingboltinthe
boom.
6.Loosentheadjustingboltuntilyoucanremovethe
chainfromtheboom.
7.Removethechainfromthedrivesprocket.
8.Removethesixboltssecuringthedrivesprocket
(Figure61).
9.Removeanddiscardthedrivesprocket(Figure61).
10.Cleanthesprocketmountingsurfaceonthetrencher
(Figure61).
11.Slidethenewsprocketontotheshaft(Figure61).
Important:Thearrowonthesprocketface
shouldbevisiblefromtherightsideofthe
trenchandshouldpointinaclockwisedirection;
ifnot,turnthesprocketaround.
12.Threadthesixboltsintothesprocketngertight
(Figure61).
13.Slowlybegintighteningtheboltsprogressingaround
thesprocketuntilallboltsaretorquedto95to115
ft-lb(129to155N-m).
Important:Tighteneachboltonlyhalfway
rst,workingyourwayaroundthesixbolts,
thenreturntoeachboltinturnandtorquethem
14.Loopthechainovertheaugerdriveshaftandonto
thedrivesprocket,ensuringthattheteethpoint
forwardontheupperspan.
15.Settheupperspanofthechainintoplaceonthe
trencherboom,thenwrapthechainaroundthe
rollerattheendoftheboom.
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