6-2 - LOWER UNIT 90-826148R2 MARCH 1997
General Service
Recommendations
There may be more than one way to “disassemble”
or “reassemble” a particular part(s), therefore, it is
recommendedthattheentireprocedurebereadprior
to repair.
IMPORTANT: Read the following before attempt-
ing any repairs.
In many cases, disassembly of a sub-assembly may
not be necessary until cleaning and inspection re-
vealsthatdisassemblyisrequiredforreplacementof
one or more components.
Service procedure order in this section is a normal
disassembly-reassembly sequence.
Threaded parts are right hand (RH), unless other-
wise indicated.
When holding, pressing or driving is required, use
soft metal vise jaw protectors or wood for protection
ofparts.Useasuitablemandrel(onethatwillcontact
onlythebearing race)whenpressingordrivingbear-
ings.
Whenevercompressedairisusedtodryapart,verify
that no water is present in air line.
Bearings
All bearings must be cleaned and inspected. Clean
bearings with solvent and dry with compressed air.
Airshouldbe directedatthebearingsothatitpasses
throughthebearing.DONOTspinbearing withcom-
pressed air as this may cause bearing to score from
lack of lubrication. After cleaning, lubricate bearings
with Quicksilver Gear Lubricant. DO NOT lubricate
tapered bearing cups until after inspection.
Inspectallbearingsforroughness,catchesandbear-
ing race side wear. Work inner bearing race in-and-
out, while holding outer race, to check for side wear.
Wheninspectingtaperedbearings,determinecondi-
tion of rollers and inner bearing race by inspecting
bearing cup for pitting, scoring, grooves, uneven
wear, imbedded particles and/or discoloration from
over-heating. Always replace tapered bearing and
race as a set.
Inspect gear housing for bearing races that have
spun in their respective bores. If race(s) have spun,
gear housing must be replaced.
Roller bearing condition is determined by inspecting
the surface of the shaft that the roller bearing sup-
ports. Check shaft surface for pitting scoring, groov-
ing, imbedded particles, uneven wear and/or discol-
oration from overheating. The shaft and bearing
must be replaced if such a condition exists.
Seals
As a normal procedure, all O-rings and oil seals
SHOULD BE REPLACED without regard to appear-
ance.Topreventleakagearoundseals,applyLoctite
271 to outer diameter of all metal case seals. When
using Loctite on seals or threads, surfaces must be
clean and dry. Apply 2-4-C w/Teflon on all O-rings
andonI.D.ofoilseals.Apply2-4-Cw/Teflontoexter-
nal surfaces of bearing carrier.
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