PISTON 1474436 - Caterpillar

Illustration 1 g00383893
Transfer Gear Lubrication
(1) Output transfer gear. (2) Transmission. (3) Input transfer gear. (4) Passage. (5) Manifold. (6) Holes. (7) Tube. (8) Tube. (9) Passage. (10) Tube.
Oil from the transmission oil cooler enters manifold (5) and flows into the input shaft of the transmission. The remainder of the oil flows through passage (4) in the manifold to tube (7) in input gear housing (3).Tube (7) connects oil passages from the front of input gear housing (3) to the rear of the housing. Tube (7) has two holes (6) that spray oil on the two gears as the gears mesh. The oil cools the gears. The oil also lubricates the gears.The oil flows through tube (7) to the inlet at the base of input gear housing (3). The oil flows through a tube (10) in transmission housing (2) to a passage in output transfer gear housing (1). Tube (8) at the end of the passage in the output transfer gear housing supplies oil to the two reservoirs.One reservoir is behind the idler gear. This reservoir supplies oil to drilled holes in the fixed shaft to supply oil to the idler gear bearings. The other reservoir is behind the drive gear for the secondary steering pump. A tube carries oil from the reservoir to the center of the drive gear for the secondary steering pump. This oil lubricates the bearings for the drive gear and the splines for the secondary steering pump. Output transfer gear housing (1) is the oil reservoir for the transmission circuit. Passage (9) allows lubrication oil from the output shaft bearings to drain to the reservoir. A hose connects the torque converter housing to the output transfer gear housing. All of the drain oil from the input gears and the transmission flows through openings in the bottom of the housings to the output transfer gear housing.