SCREEN AS 9T3850 - Caterpillar

Illustration 1 g03719376
Generator Hydraulic System
(1) Filter bypass switch
(2) Pressure sensor
(3) Generator oil cooler
(4) Generator and charge gear pump
(5) From hydraulic tank
(6) Generator sump
(7) To vibratory manifold
(8) Generator lubricator
(9) Check valve
(10) Filter bypass valve
(11) Generator oil filter When the engine is running, the generator and charge gear pump (4) produces flow. The generator lube oil section of this pump provides hydraulic flow for the cooling and lubrication of the generator system.Oil from pump (4) is directed through generator oil cooler (3) to the generator oil filter (11). The filter housing contains a bypass valve (10). If the pressure differential across the filter is greater than 517 kPa (75 psi), the bypass valve opens. When the valve opens, oil flows directly to lubricator (8).The housing of generator oil filter (11) contains filter bypass switch (1). This switch opens when the differential across the filter is greater than 345 kPa (50 psi). This switch sends a signal to the machine ECM in order to alert the operator to a possible clogged filter.Check valve (9) is installed in parallel with generator oil cooler (3). If the pressure across cooler and filter (11) increases to 700 kPa (100 psi), the check valve opens. When the check valve is open, lubrication oil flows through the check valve to generator lubricator (8). This action provides oil to the generator lubricator if the oil cooler is blocked.Pressure sensor (2) monitors the hydraulic pressure at the outlet of generator oil filter (11). This sensor transmits pressure information to the machine ECM.