▣ Direction of Rotation ▶Low and reverse brake (LR/B) applied → overdrive hub locked → rear and intermediate planetary gear locked ▶Input shaft rotation → rear sun gear rotation → rear inner pinion rotation (reverse) → rear outer pinion rotation → rear ring gear rotation → front ring gear rotation → front pinion rotation → front sun gear rotation (reverse) → under-drive (U/D) hub rotation (reverse) ▶Input shaft rotation → overdrive clutch (OD/C) hub rotation ▶Input shaft rotation → 35R clutch rotation
R
Clutch/Brake Application Chart
LR/B
26/B
35R/S
DO/C
OWC
●
●
▣ Power Flow ▶ Intermediate support locked, intermediate sun gear rotates ▶ Rotation of the intermediate planetary sun gear with the support locked decelerates and reverses the ring gear (front carrier), transmitting power to the front carrier. ▶ Front and rear ring gears of the rear planetary gear rotate at reduced speed, causing the load to rotate in reverse against the front sun gear of the front planetary gear.
D1
Clutch/Brake Application Chart
LR/B
26/B
35R/S
DO/C
OWC
●
(°)
●
▣ Power Flow ▶ Front planetary gear and locked rear and intermediate support, rear planetary gear in constant rotation ▶ As the rear planetary gear rotates, power is reduced at the rear planetary gear, then transmitted to the front and rear ring gears. Power is then reduced again at the front sun gear, whose rotation is locked, and then delivered to the driver. ▶ The intermediate ring gear, integral with the front bracket, rotates and drives the intermediate planetary gear in unloaded reverse rotation.
D2
Clutch/Brake Application Chart
LR/B
26/B
35R/S
DO/C
OWC
●
●
▣ Power Flow ▶ Front sun gear and intermediate sun gear locked, rear sun gear in constant rotation ▶ Rotation of the rear sun gear transmits power to the forward and reverse ring gears and the reaction of the front carrier and intermediate ring gear, on which the sun gear is mounted, is transferred to the rear and center supports, providing power balance and transmission of power to the front support.
D3
Clutch/Brake Application Chart
LR/B
26/B
35R/S
DO/C
OWC
●
●
▣ Power Flow
▶ Front planetary gear set is locked, rear and intermediate planetary gear sets rotate
▶ Rotation of the intermediate sun gear and the rear sun gear transmits power to the front and rear ring gears. The reaction at the front and intermediate ring gear, on which the sun gear is fixed, is transferred to the rear and intermediate supports, resulting in power balance and power transfer to the front carrier.
D4
Clutch/Brake Application Chart
LR/B
26/B
35R/S
DO/C
OWC
●
●
▣ Power Flow
▶ Front sun gear is locked and rear carrier and rear sun gears rotate
▶ Engaging the overdrive clutch (OD/C) synchronizes the planetary and the rear planetary carrier. A 1:1 gear ratio passes through the front and rear reverse ring gears and reaches the support in front of the front planetary gear set, to which the sun gear is attached.
▶ The intermediate sun gear of the intermediate planetary gear set rotates here at higher speed in the normal direction and at zero load due to the action of the reduced ring gear and carrier, which has a 1:1 gear ratio.
D5
Clutch/Brake Application Chart
LR/B
26/B
35R/S
DO/C
OWC
●
●
▣ Power Flow
▶ Rear and intermediate carriers, intermediate planetary gear set and planetary gear set rotate rearward
▶ The intermediate planetary carrier and the sun gear rotate simultaneously, resulting in transfer of the gear ratio from 1:1 to the intermediate ring gear (front carrier).
▶ The rear planetary gear set rotates here at a 1:1 gear ratio, as it would when 4th gear is engaged. However, the front planetary gear set is not restricted, and the front sun gear rotates in the normal direction at zero load and a 1:1 gear ratio.
D6
Clutch/Brake Application Chart
LR/B
26/B
35R/S
DO/C
OWC
●
●
▣ Power Flow
▶ Intermediate support rotates and intermediate sun gear is locked.
▶ If the sun gear of the intermediate planetary gear set is locked and the support can rotate, the intermediate ring gear increases the rotation ratio and transmits power to the front carrier.
▶ The rear planetary gear set maintains a 1:1 gear ratio here, as it would when 4th or 5th gear is engaged. However, the front sun gear is not restricted, and the front sun gear rotates faster in the normal direction at zero load.
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