Systems, apparatuses, and methods for monitoring pressure in a hydraulic system

A mining truck comprising:

• a first hydraulic system to drive traction wheels of the mining truck;
• a second hydraulic system to operate a steering system of the mining truck;
• and
• a third hydraulic system to operate braking components of the mining truck, wherein the third hydraulic system includes:
• a hydraulic brake pump;
• a hydraulic brake accumulator in fluid communication with the hydraulic brake pump and the braking components of the mining truck;
• a first sensor to sense pressure characteristics of the hydraulic brake pump;
• a second sensor to sense pressure characteristics of the hydraulic brake accumulator;
• and
• circuitry electrically coupled to the first sensor and the second sensor, and configured to:
• receive a plurality of signals from the first sensor regarding sensed pressure characteristics of the hydraulic brake pump over a predetermined number of brake actuation cycles, the sensed pressure characteristics of the hydraulic brake pump including information regarding a maximum brake pump pressure for each of the brake actuation cycles,
• receive a plurality of signals from the second sensor regarding sensed pressure characteristics of the hydraulic brake accumulator over the predetermined number of brake actuation cycles, the sensed pressure characteristics of the hydraulic brake accumulator including information regarding a charge time and a discharge time of the hydraulic brake accumulator for each of the brake actuation cycles,
• determine whether the maximum brake pump pressure for each of the brake actuation cycles reaches a predetermined pressure threshold level,
• record any occurrences of maximum brake pump pressure failing to reach the predetermined pressure threshold level over the predetermined number of brake actuation cycles,
• determine whether the charge time of the hydraulic brake accumulator for each of the brake actuation cycles is at or below a predetermined charge time threshold level,
• record any occurrences of the charge time of the hydraulic brake accumulator for each of the brake actuation cycles exceeding the predetermined charge time threshold level over the predetermined number of brake actuation cycles,
• determine whether the discharge time of the hydraulic brake accumulator for each of the brake actuation cycles is at or above a predetermined discharge time threshold level,
• record any occurrences of the discharge time of the hydraulic brake accumulator for each of the brake actuation cycles failing to reach the predetermined discharge time threshold level over the predetermined number of brake actuation cycles,
• determine whether an abnormal brake pressure condition exists over the predetermined number of brake actuation cycles based on a total number of recorded occurrences of the maximum brake pump pressure failing to reach the predetermined pressure threshold level, a total number of occurrences of the charge time of the hydraulic brake accumulator exceeding the predetermined charge time threshold level, and a total number of occurrences of the discharge time of the hydraulic brake accumulator failing to reach the predetermined discharge time threshold level, and
• cause output of an abnormal brake pressure condition maintenance indication responsive the determining indicating that the abnormal brake pressure condition exists.