
6. Maintenance
9
Properlymaintained,theHAKKO474desolderinggunshouldprovideyearsofgoodservice.
Efcientdesolderingdependsuponthetemperature,andthequalityandquantityofthesolderandux.Per-
formthefollowingserviceproceduresasdictatedbytheconditionsofthegun’susage.
WARNING :
Sincethedesolderingguncanreachaveryhightemperature,pleaseworkcarefully.
Exceptwhencleaningthenozzleandheatingelement,alwaysturnthepowerswitchoffanddiscon-
nectthepowerplugbeforeperforminganymaintenanceprocedure.
Servicing the Desoldering Gun
CAUTION
Thedesolderinggunwillbeextremelyhot.
Duringmaintenance,pleasewearglovesand
workcarefully.
1. Inspect and clean the nozzle.
• Pluginthepowercord,turnthe
powerswitchOnandletthenozzle
heatup.
• Cleanouttheholeofthenozzle
withthenozzlecleaningpin.
CAUTION
Thecleaningpinwillnotpassthroughthe
nozzleuntilthesolderinsidethenozzleis
completelymelted.
• Ifthecleaningpindoesnotpass
throughtheholeinthenozzle,
cleanwiththecleaningdrill.
• Checktheconditionofthesolder
platingonthetipofthenozzle.
• Ifitisslightlyworn,recoatthetipwith
freshsoldertopreventoxidation.
• Checktheconditionofthesurface
andinsideholeofthenozzle.
• Ifeitheriswornoreroded,orthe
insidediameterseemsunusually
wide,replacethenozzle.
CAUTION
Theinsideholeandthesurfaceofthe
nozzleisplatedwithaspecialalloy.
Shouldthisalloybecomeerodedbyhigh-
temperaturesolder,thenozzlewillnotbe
abletomaintainthepropertemperature.
2. Disassemble the heating
element.
CAUTION
Theheatingelementisveryhotduring
operation.
3. Clean out the hole in the
heating element with the
provided cleaning pin.
CAUTION
Besurethesolderintheholeintheheat-
ingelementiscompletelyheated,before
cleaningthehole.
• Ifthecleaningpincannotpass
throughthehole,replacetheheat-
ingelement.
• Turnthepoweroffaftercleaning.
Cleaning with the nozzle cleaning pin
Cleaning with the cleaning drill
•Beforecleaning
•Aftercleaning
Solderplating
Diameterofholeiswid-
enedthrougherosion.
(DesolderingGun)
Thecleaningpinpassescom-
pletelythroughthehole.
Insertthebitwhileturningitclockwise.
Pullthedrillbitoutstraightwithoutturningit.
CAUTION
Ifthecleaningdrillisforcedintothenozzle,
thedrillbitcouldbreakorbedamaged.
CAUTION
Pleaseusethepropersizecleaningpinor
cleaningdrillforthenozzlediameter.
CAUTION
Unfortunately,itisoftendifculttoobserve
thiscondition.Therefore,ifdesoldering
efciencygoesdownandallotherparts
appeartobeOK,thenozzleisprobably
erodedandshouldbereplaced.
HeatingElement ElementCover
Nozzle Nut
Removethenutwiththeattachedwrench.
Scrapeawayalloxidationfromtheholeintheheatingelementuntilthe
cleaningpinpassescleanlythroughthehole.
Thecleaningpinpassescleanly
andcompletelythroughthehole.
English