CURRENT TRANSFORMER 5N4252 - Caterpillar

Illustration 1 g00730549
Location of the pump for the brakes and fan drive
Illustration 2 g00424028
A typical example of a section view of a gear pump.The idler gear (3) meshes with the drive gear (1). The rotation of the two gears creates a partial vacuum. The partial vacuum is created at the pump inlet as the gear teeth separate. This draws the oil from the hydraulic tank. Oil enters the pump into cavity (4). The turning of the two gears causes the low pressure oil from cavity (4) to move around the inner pump housing to cavity (2). As the teeth mesh at the outlet port, the oil is forced out of the gear pump.