A system for an engine, the system comprising: a plurality of channels (218, 220, 224) routing lubricating oil to a gear system and a drive shaft of a pump without flowing an entire volume of the lubricating oil through a cavity of the drive shaft, the gear system including a gear enclosing a gear hub, an end cover (212, 214) of the pump on each of first and second sides of the gear; one or more bushings (404, 406) at interfaces of the gear hub and the end cover of the pump, the interfaces of the gear hub comprising a first interface of the gear hub and a second interface of the gear hub, wherein the one or more bushings (404, 406) comprises: a first bushing at the first interface of the gear hub and a first thrust face on the first side of the gear; and a second bushing at the second interface of the gear hub and a second thrust face on the second side of the gear, wherein the plurality of channels (218, 220, 224) is drilled in the end cover of the pump from one side of the gear system to another side of the gear system, the plurality of channels (218, 220, 224) including: a first vertical channel originating from the first bushing and extending vertically away from the drive shaft; a second horizontal channel originating from the first vertical channel and extending from the first side of the gear to the second side of the gear; and a third vertical channel originating from the second horizontal channel and extending longitudinally along the end cover, wherein the first vertical channel includes an inlet through which the lubricating oil enters the first vertical channel, characterised in that the first vertical channel includes a first section delivering a first portion of the lubricating oil to the first bushing, the gear hub, the first side of the gear, the first thrust face, and the drive shaft via an outlet of the first vertical channel, and a second section delivering a second portion of the lubricating oil to the second horizontal channel. a plurality of channels (218, 220, 224) routing lubricating oil to a gear system and a drive shaft of a pump without flowing an entire volume of the lubricating oil through a cavity of the drive shaft, the gear system including a gear enclosing a gear hub, an end cover (212, 214) of the pump on each of first and second sides of the gear; one or more bushings (404, 406) at interfaces of the gear hub and the end cover of the pump, the interfaces of the gear hub comprising a first interface of the gear hub and a second interface of the gear hub, wherein the one or more bushings (404, 406) comprises: a first bushing at the first interface of the gear hub and a first thrust face on the first side of the gear; and a second bushing at the second interface of the gear hub and a second thrust face on the second side of the gear, wherein the plurality of channels (218, 220, 224) is drilled in the end cover of the pump from one side of the gear system to another side of the gear system, the plurality of channels (218, 220, 224) including: a first vertical channel originating from the first bushing and extending vertically away from the drive shaft; a second horizontal channel originating from the first vertical channel and extending from the first side of the gear to the second side of the gear; and a first vertical channel originating from the first bushing and extending vertically away from the drive shaft; a second horizontal channel originating from the first vertical channel and extending from the first side of the gear to the second side of the gear; and a third vertical channel originating from the second horizontal channel and extending longitudinally along the end cover, wherein the first vertical channel includes an inlet through which the lubricating oil enters the first vertical channel, characterised in that the first vertical channel includes a first section delivering a first portion of the lubricating oil to the first bushing, the gear hub, the first side of the gear, the first thrust face, and the drive shaft via an outlet of the first vertical channel, and a second section delivering a second portion of the lubricating oil to the second horizontal channel.