Allison Transmission T 270 User Manual

NOTE:Failuretofollowtheseproceduresduringcolduid
conditions,maycausetheCHECKTRANSlighttoilluminateandthe
transmissiontoberestrictedtoN(Neutral).
Transmissionoperationatextremelycoldambienttemperaturesmayrequire
preheatingortheuseofaTES295
®
orTES668
TM
transmissionuid.Referto
3.3.1PreheatingRequirement.
3.3.1PreheatingRequirement.
NOTE:For3000Seriesmodels,thecombinationofaretarderand
ashallow(2inch)sumpcancauseatrucktoexhibitadelaywhen
launchingincoldambientconditionswithcoldtransmissionuid.To
improvevehiclelaunchinconditionsbelow0ºC(32ºF):
•Makesurethetransmissionoillevelisfull(attheHotFullmark
withthetransmissionatitsnormaloperatingtemperature).
•Recommendthevehicletoundergoawarm-upperiodwhen
startingunderthedescribedcoldambientconditions.
•Ifawarm-upperiodisnotpossible,elevatetheenginespeed
to1300-1500rpmafterD(Drive)isselectedforvehicle
movement.
Theserecommendationswillsignicantlyimprovevehiclelaunchwhen
operatingthevehicleincoldambientconditions.
Ifambienttemperaturesdropbelowthespeciedminimumlevelsfortheuid
type,preheatthetransmissionuidbeforebeginningtransmissionoperation.
Theminimumuidtemperaturesatwhichthetransmissionmaybesafely
operatedwithoutpreheatingareshowninTable3–1.
Table3–1.FluidTypeSpecicationsforMinimumTemperature
MinimumTemperature
FluidType
Celsius
Fahrenheit
TES295
®
andTES668
TM
–35–31
TES389
®
–25–13
Preheatthetransmissionuidusingoneofthefollowingmethods:
•Useanauxiliaryheatsourcesuchasasumpheater.
•OperatethetransmissioninN(Neutral)withtheenginerunningatidle
foraminimumof20minutesbeforeattemptingrangeoperation.
37

Allison Transmission T 270 Specifications

General

Brand	Allison Transmission
Model	T 270
Category	Controller
Language	English