A fluid management system for a drivetrain includes a first reservoir, a second reservoir, a main suction line, and a second suction line. The first reservoir is positioned in a lower portion of a transmission. The first reservoir has a preselected fluid level. The second reservoir is positioned in a lower portion of the transmission. The second reservoir is separated from the first reservoir by a barrier having an opening. The main suction line has an opening positioned in a lower portion the first reservoir below the preselected fluid level. The second suction line has an opening positioned in a lower portion of the second reservoir.

A power transmission device includes: an axle housing having a central hole where a drive shaft is penetrated; a wheel hub disposed in an outer portion of the axle housing via wheel bearings; a speed-reducer housing chamber provided in the wheel hub to cover an opening end portion of the axle housing; a gear speed reducer, formed inside the speed-reducer housing chamber, to decelerate a rotation of the drive shaft and transmit the rotation to the wheel hub; and a wet-type brake mechanism housed in a brake chamber formed between the axle housing and the wheel hub, and actuated such that braking is applied to a rotation of the wheel hub relative to the axle housing. Further, floating seals are disposed between a lubrication space and the speed-reducer housing chamber, and a circulation passage for oil that includes an oil filter is connected to the lubrication space.

An axle depends from a heavy-duty vehicle. Each one of a pair of wheel end assemblies is mounted on a respective one of the ends of the axle. Each wheel end assembly includes a pair of bearings mounted on a spindle of the axle, and a wheel hub rotatably mounted on the bearings. A cavity is formed in the wheel end assembly between the bearings. A port is formed in the wheel hub and extends axially inwardly from an outboard end to a lubricant cavity of the hub, and angles radially inwardly from the outboard end to the lubricant cavity at an angle relative to an axial centerline of the hub. Lubricant for the bearings is introduced into the cavity by means of the port, and the port is tapped to receive a plug to seal it and contain the lubricant in the cavity. The port also provides a visual indicator if there is a leakage of semi-fluid grease.

A vehicle wheel bearing apparatus has an outer member, an inner member, double row rolling elements, and seals. At least one seal of the seals has a metal core press-formed from steel sheet with a cylindrical fitting portion. A radial portion extends radially inward from the end of the fitting portion. A sealing member with a plurality of sealing lips is integrally adhered to the fitting portion of the metal core. Bearing grease is contained within the bearing. Sealing grease is applied to the sealing lips. Both the bearing grease and the sealing grease use the same thickener and the worked penetration of 350 or less. The kinematic viscosity of the base oil of the sealing grease at 40 C. is set to 70% or less of the kinematic viscosity of the base oil of the bearing grease at 40 C.

Systems are provided for an axle arm including a lubricant reservoir and a driveshaft. In one example, system may include a lubricant reservoir of an axle arm comprising a fill line at an edge of a driveshaft, wherein a central axis of the lubricant reservoir is misaligned with a central axis of the driveshaft.

A component for a wheel hub assembly and an axle assembly comprising: a volume; a channel, the channel extending from a first side of the wheel hub to the volume; a first port, placing the channel in fluid communication with the volume; and a second port, placing the channel in fluid communication with a surface of the first side; wherein the wheel hub houses a bearing via the volume, and lubricant is applied to the volume and the bearing via the channel while the wheel hub remains assembled and physically coupled to other components of a vehicle.

Systems are provided for an axle arm including a lubricant reservoir and a driveshaft. In one example, system may include a lubricant reservoir of an axle arm comprising a fill line at an edge of a driveshaft, wherein a central axis of the lubricant reservoir is misaligned with a central axis of the driveshaft.

An axle comprising: a central housing; an axle arm fastened to the central housing via a plurality of first fasteners; and an oil baffle fixed to the central housing via at least one fastening element that is coaxial with at least one fastener from the plurality of first fasteners and at least one hole from a plurality of pre-existing holes of the central housing.

An axle assembly includes an axle configured for rotation by receiving rotational power from the power source and an axle housing containing the axle. The axle assembly further includes a brake disk disposed in the axle housing, coupled to the axle, and configured for rotation upon the rotation of the axle, a lubricant circuit extending from a lubricant circuit inlet axially aligned with the brake disk to a lubricant circuit outlet in the axle housing, and a heat exchanger disposed in the lubricant circuit to exchange heat between lubricant in the lubricant circuit and coolant circulating through the heat exchanger.

An axle includes a differential, a cover, and a heat absorber. The differential has a ring gear disposed within a housing. The ring gear is configured to pump a lubricating fluid. The cover is attached to the housing. The heat absorber is attached to the cover within a pump path of the ring gear. The heat absorber has a phase-change material disposed within the heat absorber configured to absorb heat from the lubricating fluid. A method to control fluid temperature in a vehicle axle is also included.