Preparation#for#Use#
#
Remove#the#3165#Arbor#from#its#kit#case#and,#if#present,#disassemble#stored#
adapters#from#its#shaft.#Stand#upright#in#bore#of#case.##
#
As#shipped,#the#top#end#of#the#arbor#assembly#is#sealed#by#an#internal,#spring#
loaded#seal#located#on#the#suspension#rod#under#the#indicator#bushing.#In#
addition#to#preventing#loss#of#dash#pot#damping#oil,#this#seal#also#supports#the#
suspension#rod#in#a#fixed#position#in#the#arbor#during#shipment#or#storage.#To#
unseat#the#spring#loaded#seal#and#free#the#suspension#rod#for#normal#operation,#
push#the#indicator#bushing#downward,#against#the#spring#loaded#pressure,#so#
that#its#bottom#surface#clears#the#black#indicator#disc#by#approximately#0.003#
inch.##
#
Release#the#indicator#collar,#if#stored#depressed,#and#Clean#the#arbor#shaft,#
indicator#surface#at#its#upper#(top)#end#of#arbor#shaft#and#the#adjacent#indicator#
collar.#Depress#the#indicator#collar#to#release#the#damping#oil#internal#seal#and#
position#to#a#clearance#of#.004”#<#.006”#with#the#arbor#end.#Secure#lightly#with#its#
set#screw#and#check#for#free#movement#over#its#full#range#of#travel.##
#
NOTE:#Prior#to#storing#arbor#in#kit#case#after#use,#release#indicator#collar#to#allow#
oil#seal#to#move#upward#and#seat.#It#is#not#necessary#to#retighten#set#
screw.##
#
Check#the#circular#gap#between#the#upper#unit#of#the#arbor#and#the#tapered#
protector#sleeve#above#the#indicator#collar#for#foreign#material#and#clearance.#The#
set#screw#in#the#protector#sleeve#may#be#loosened#to#lower#sleeve#for#cleaning.#A#
cloth#dampened#with#mineral#spirit#type#solvent#may#be#used#but#do#not#immerse#
the#arbor#in#solvent#at#any#time.#Reposition#the#protector#sleeve#to#provide#a#gap#
of#.005”#<#.008”#when#the#arbor#is#suspended#by#the#cable#loop#(or#quick#
disconnect#coupling)#and#secure#sleeve#in#place#with#the#setscrew.##
#
#
Balance'Indicator'Damping'
'
Damping#to#control#oscillation#of#indicator#movement#is#produced#by#dash#pot#
action#of#a#light#viscosity#“baby#oil”,#contained#within#the#arbor#shaft.#Oil#can#be#
added#or#removed#thru#the#two#screw#sealed#bores#in#the#wall#of#the#arbor#shaft#
to#adjust#this#action#to#give#good#indicator#movement#but#resist#excessive#
oscillation#when#balancing.##
#
Use#of#heavier#oil#for#damping#or#if#an#oil#has#created#a#deposit#within#the#arbor,#
the#indicator#will#tend#to#adhere#at#its#extreme#displaced#positions.#This#can#be#
corrected#by#removing#the#sealing#screws#and#draining#all#of#the#oil.#Flush#well#
internally#with#a#mineral#spirit#type#solvent.#Do#not#flood#the#area#above#the#
