Toro Groundsmaster 3280-D - Page 346

4-WheelDriveRearAxle(continued)
The4-wheeldriverearaxleusedontheGroundsmaster3280-Disasteerable,
mechanicaldriveaxle.Adriveshaftconnectedtothefrontaxleoutputshaft
providespowertothe4-wheeldriverearaxle.Thedriveshaftincorporatesa
bi-directionalclutchthattransferspowerfromthedriveshafttothe4-wheeldrive
rearaxleinputshaft(Figure194).
g225899
Figure195
1.Forwardclutch
engagement
2.Neutral(freewheeling)
3.Reverseclutch
engagement
Anytimethefrontwheelschangespeed(e.g.,initiallypressingthetraction
pedal,climbinganincline,andtiresslipping),therearaxledriveshaftspeedalso
changes.Assoonasthedriveshaftandtherearaxleinputshaftturnatslightly
differentspeeds,thebi-directionalclutchwillengageandpoweristransferred
totherearaxle(Figure195).Theresultisautomatic4-wheeldrive.Theclutch
engagesineitherforwardorreversedirection.
Note:Thebi-directionalclutchmaynotoperateproperlyifdifferentsizetiresare
usedorifcorrecttirepressureisnotmaintained.
DriveAxles:GeneralInformation
Page8–4
Groundsmaster
®
3280-D/3320
05138SLRevB