RETAINER 1463500 - Caterpillar

Illustration 1 g00600479
Reducing Valve (1) Manifold (2) Spring (3) Guide (4) Passage (5) Orifice (6) Passage (7) Passage (8) Spool assembly (9) Passage (10) PassageThe reducing valve is part of the transmission hydraulic controls. The reducing valve is fastened to the planetary transmission. The reducing valve reduces the speed clutch pressure.The speed clutch pressure enters the valve at passage (4) and flows through the orifice (5). If the transmission input shaft speed is above 1480 rpm, no oil can flow from passages (6) and (7). If the torque converter lockup clutch signal pressure is blocked by the load piston, no oil can flow from passages (6) and (7). The oil pressure will then increase. This will force the spool assembly (8) to move upward. When the spool assembly (8) moves up against the guide (3), the speed clutch pressure oil from passage (4) will go through the spool assembly (8) and out passage (9) to the lockup clutch.When the load piston moves or when oil flows to the lockup clutch selector valve, the spring (2) will force the spool assembly (8) downward. This will block the flow of the pressure oil to the lockup clutch. The oil pressure in passage (9) will drain out through passage (10).