TheKDEDirectTREX550/600SeriesUniversalMainGearCase(AT550/600‐UMGC)

wasdevelopedfortheALIGNTREX600EFLPROserieshelicopters,andisalso

compatibleontheTREX550and600series��withthelatest“V2”componentsfrom

ALIGN.WhenusingtheUniversalMainGearCaseinconjunctionwiththe

industry‐

leadingKDEDirect700SeriesMainDriveGears(AT700‐MDGM1),aneasyupdateto

thesetupprocedurewillpreventanyneedformodificationstothe550/600frames.

Toprovideproperclearancebetweenthe

KDE��DirectMainDriveGearandthestock

CarbonFrames,relocatethestockMain

ShaftSpacer:

(1) RemovetheMainShaftSpacer

betweentheUpperBearingBlock

andMainShaftCollar.

(2) RelocatetheMainShaftSpacer

betweentheLowerBearingBlock

andtheMainGearCase(upper



surfaceoftheOne‐WayBearing

Sleeve);easilyinstalledbyorienting

thehelicopterupside‐downduring

theinstallationoftheMainGearSet.

PROPERCLEARANCEACHIEVEDAND

ADDEDBENEFITOFIMPROVEDMESH

ALIGNMENTFORTORQUE‐TUBEGEARING