Operator's Manual

2.Checkthewearchannelatthebottomoftheboomfor
signsofdamageandexcessivewear(Figure60).
Note:Ifthewearchanneliswornthroughtothe
bracketofthechannel,replacethewearchannel;refer
toReplacingtheTrencher-WearChannel(page34).
ReplacingtheTrencher-Chain-Wear
Strip
1.Loosenthetrencherchain;refertoDecreasingthe
ChainTension(page31).
2.Liftthechainatthetopoftheboom,andinstallwood
blocksbetweenthechainandtheboom(Figure61).
Note:Supportingthechainatthebottomofthe
boomhelpsbyliftingthechainabovethewearstrip.
Figure61
1.Wearstrip(short)4.Support
2.Blocks5.Diggingchain
3.Wearstrip(long)
6.Wearchannel
3.Removethefollowingtopwearstripsasneeded:
•Removethe2bolts(3/8x3/4inch)thatsecure
theshortsegmentofwearstriptothetopofthe
boom-mounttting(Figure62).
Figure62
48inchboomshown;thediggingchainhasbeenremoved
forclarity.
1.Bolt(3/8x3/4inch)4.Wearstrip(short)
2.Bolt(3/8x1inch)5.Wearstrip(long)
3.Lockwasher
•48inchrockboom—removethe4bolts(3/8
x1inch)andlockwashersthatsecurethelong
segmentofthewearstriptothetopoftheboom.
•60inchrockboom—removethe5bolts(3/8
x1inch)andlockwashersthatsecurethelong
segmentofthewearstriptothetopoftheboom.
4.Removethewearstrip(s)(Figure62).
5.Cleanthethreadsofthebolts.
6.Applymedium-grade(serviceremovable)
thread-lockingcompoundtothethreadsofthebolts.
7.Aligntheholesofthenewwearstrip(s)withtheholes
inthetopoftheboom-mounttting,boom,orboth
(Figure62).
8.Securethewearstriptothetopoftheboomwiththe
boltsthatyoupreviouslyremoved(Figure62).
9.Removethewoodblocksandlowerthechainontothe
boom.
10.Adjustthechaintensionofthetrencher;referto
IncreasingtheChainTension(page31).
33