ADAPTER ASSEM. 6N7375 - Caterpillar

Planetary Lubrication
Illustration 1 g06002780
Planetary lubrication
(3) No. 2 and 3 carrier
(11) Hub
(14) Input Shaft
(24) No. 1 carrier
(25) Cavity
(27) Cavity
(29) Manifold
(30) CavityThe oil for lubrication of the transmission comes from the lubrication distribution manifold and the main relief valve.Oil from the oil cooler flows through manifold (29). Oil from manifold (29) flows to cavity (30) and the drilled passages in input shaft (14).Cavity (30) sends oil to cavity (25). Drilled passages in the No. 1 carrier (24) and the No. 2 and 3 carrier (3) send oil to the direction clutches and the No. 3 clutch.Oil is metered to the direction clutches. The FORWARD ring gear and the REVERSE ring gear have drilled oil passages. Oil flows through the drilled passages to the direction clutches.Oil comes through the drilled passages in input shaft (14) and flows to the clearance between the input shaft and the output shaft. The oil lubricates bearings at both ends of the output shaft. The oil then flows through drilled passages in the output shaft to cavity (27) and hub (11).Planetary bearings and thrust discs get oil from cavities (30) and (27) through the drilled passages in the planetary shafts. Drilled passages in hub (11) and the ring gear for the No. 4 clutch send oil to the No. 5 and No. 4 clutches for lubrication.The gears throw oil around the housing and this process lubricates the rest of the components. Oil is also released at pressure/flow points. Lubrication oil flows through the clutches and drains to the bottom of the transmission case.