Wet disc brake with internal drive/external cooler

A wet disc brake fluid cooling system for drawing brake fluid out of a brake housing to cool the brake fluid comprising:

• a brake housing;
• an axle housing connected to said brake housing wherein the brake fluid can flow between said brake housing and said axle housing;
• an internal axle shaft rotatingly connected to said axle housing;
• a first spur gear in direct driving engagement with said internal axle shaft;
• an internal pump connected to said first spur gear for drawing brake fluid from said axle housing;
• an external cooling tube connected to said internal pump and said brake housing for reducing the temperature of the fluid and guiding the fluid back to said brake housing.

A wet disc brake fluid cooling system comprising:

• an input shaft defining a longitudinal axis of rotation;
• a pair of axle shafts driven by said input shaft to drive vehicle wheels, said axle shafts defining a lateral axis of rotation that is transverse to said longitudinal axis of rotation;
• a brake housing mounted to each of said wheels and including fluid for a wet disc brake assembly;
• a pump driven by at least one of said axle shafts wherein said fluid is drawn out of said brake housing to cool said fluid;
• an axle housing mounted to said brake housings wherein said fluid can flow between said brake and axle housings;
• and an external cooling tube connected to said pump and said brake housing for reducing the temperature of said fluid and guiding said fluid back to said brake housing wherein said pump is mounted inside one of said brake or axle housings;
• an axle straight tee fitting interconnecting said axle housing and said external cooling tube, a first spur gear connected to one of said axle shafts for rotation about said lateral axis of rotation, a pump rod rotatingly connected to said tee fitting and defining a vertical axis of rotation that intersects said lateral axis of rotation, a propeller connected to said pump rod for rotation about said vertical axis of rotation to draw said fluid through said cooling tube, and a second spur gear connected to said pump rod at one end, wherein said second spur gear operatively engages said first spur gear.