ENGINE PROCUREMENT ARRANGEMENT 6N8596 - Caterpillar

Illustration 1 g00352827
(1) Inlet relief valve.
Illustration 2 g00356212
Priority valve group (1) Torque converter inlet relief valve (1A) Relief valve spool (9) Passage to torque converter (10) Passage to bevel gear case (11) Relief valve spring (12) Relief valve adjustment (13) Priority valve adjustment (14) Priority valve spring (15) Priority valve (15A) Priority valve spool (16) Passage from torque converter and lubrication section of the pump (17) Slug chamber (18) Supply chamber (19) SlugTorque converter inlet relief valve (1) limits the maximum oil pressure to the torque converter. The purpose of inlet relief valve (1) is preventing damage to the torque converter when the engine is started and the oil is cold.Inlet relief valve (1) limits the maximum oil pressure to approximately 900 kPa (130 psi). When the pressure in passage (9) exceeds 900 kPa (130 psi), the spool assembly (1A) shifts to the right. This shift allows the oil to drain into the bevel gear case through passage (10) .When the pressure drops below 900 kPa (130 psi), spool assembly (1A) shifts back to the left. This shift blocks the flow of oil to the drain.The setting of the torque converter inlet relief valve is adjustable by turning screw (12) . The screw can be locked in place with a locknut.