Allison Transmission 3000 Series User Manual

controloverretarderoperationandincludevarioustypesofretarderoperator
andvehicleinterfacecontrols.Someoftheavailableoperatorcontrols,known
alsoasRetarderModulationRequest(RMR)devicesinclude:
•Footpedal
•Handlever
•Automaticapplyatclosedthrottle
•Applyintegratedwithservicebrakes
•One-step,two-steporthree-stepapplies
RefertoTable4–7forthevarioustypesofretardercontrolsavailable.
Theretarderapplysystemdoesnotactuatetheretarderdirectly.The
driverusestheretarderoperatorcontrolstorequestadesiredlevelof
retardation,rangingfromnone,uptothemaximumavailablefromthespecic
retarder/transmissioncongurationinuse.TheTCMprocessestherequestin
conjunctionwithotherinputdatawhichdenesthecurrentoperatingstatusof
thetransmissionandvehicle.TheTCMturnstheretarderonattherequested
levelwhenconditionsareappropriateforretarderoperation.
Referto4.3USINGTHEHYDRAULICRETARDERforadditionalinformation
abouttheretardercontrols,retarderperformance,andretarderusage.
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Allison Transmission 3000 Series Specifications

General

Type	Automatic Transmission Controller
Control Module	Integrated
Shift Energy Management	Yes
Number of Gears	6
Torque Converter	Yes, with lock-up clutch
Retarder	Optional
PTO Provision	Yes
Input Voltage	12V or 24V
Communication Protocol	SAE J1939
Operating Temperature Range	-40°C to +85°C