Allison Transmission T 270

5.0CAREANDMAINTENANCE
5.1PERIODICINSPECTIONS
NOTE:Thetermsuidandoilareusedinterchangeablyinthis
publication.Bothtermsrefertotheuidoroilinthetransmission
andnowhereelse.
CAUTION:Donotspraysteam,water,orcleaningsolutiondirectly
atelectricalconnectorsorthebreather.Fluidsforcedintoelectrical
connectorscancausefalsecodesandcross-talk.Steam,water,
orcleaningsolutionforcedintothebreatherwillcontaminatethe
transmissionuid.Sealallopenings,thebreather,andelectrical
connectionsbeforesprayingsteam,water,orcleaningsolutionon
thetransmission.
Itisveryimportanttocontinuallymonitortheuidlevelandconnections
fortheelectronicandhydrauliccircuits.Cleanandinspecttheexteriorof
thetransmissionatregularintervals.Severityofserviceandoperating
conditionsdeterminethefrequencyoftheseinspections.Makeregular
periodicinspectionsfor:
•Propertransmissionuidll.Referto5.8PERIODICFLUIDLEVEL
CHECKS.
•Transmissionuidthatisdiscolored,hasastrongodor,orexceededoil
analysislimits.
•Presenceofenginecoolantinthetransmissionuid.
NOTE:Transmissionoverhaulisrequiredwhenthetransmission
hasbeencontaminatedwithenginecoolant.AllisonTransmission
recommendsallclutchfrictionplates,lockupclutch,solenoids,and
rusted/damagedpartsbereplacedduringtherebuild.
•Presenceoftransmissionuidintheenginecoolingsystem.
•Leakinguidaroundttingsorhydrauliclines.
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