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AXLE GP 3599523 - Caterpillar

3599523 AXLE GP Caterpillar parts AXLE
Alternative (cross code) number:
Caterpillar 3599523 AXLE GP
Weight: 1900 pounds 861 kg.

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Control Valve in Neutral
The control valve assembly is mounted on the rear of the marine gear. This valve directs and regulates the flow of oil delivered to the marine gear. The pressure regulating section of the valve furnishes automatic regulation of the pressure, with a slight delay effect to avoid smooth transmission of power when shifting from NEUTRAL to either FORWARD or REVERSE.With the engine running and the directional valve (2) in the NEUTRAL position, the oil flow through the control valve is as follows:
1-Control valve body. 2-Directional valve spool. 3-Pressure regulating springs. 4-Port to oil cooler. 5-Oil inlet port. 6-Bypass valve. 7-Damping valve.Oil flows from the filter to inlet port (5), around the stem of bypass valve (6) and through a cored passage to the NEUTRAL chamber of directional spool (2) where it is blocked. As the oil cannot flow on from the NEUTRAL chamber, the oil pressure rises. Pressure oil opens damping valve (7) and fills the bottom portion of the bypass valve. When the pressure behind bypass valve (6) is great enough to overcome the pressure regulating springs (3), the bypass valve is forced open (up) and oil passes out of the control valve through port (4) to the oil cooler.Control Valve in Ahead Position
With the engine running and the directional valve (6) in the AHEAD position, the oil flow through the control valve body (1) is as follows:Oil from the filter flows around the stem of bypass valve (16), through a passage in the directional spool valve to the ahead clutch port (13). At the same time, oil forces ball check valve (11) against its upper seat and the oil flows on to the main check valve (5). The oil forces check valve (5) against stop (3), flows through small holes in the three plugs in the bore of the check valve and flows through orifice (4) of check valve (5). The oil from the orifice flows to the end of load piston (2) and compresses pressure regulating springs (10) until the force of the load piston and the bypass valve force balance. Bypass valve (16) regulates the maximum clutch engagement pressure while check valve orifice (4) provides a gradual pressure build up to assure smooth clutch engagement. As oil enters the engaging clutch cavity, oil pressure also increases behind load piston (2) forcing it down. When clutch engagement pressure is reached, the bypass valve moves upward and oil, not needed to maintain clutch engagement, flows through port (12) to the oil cooler.
1-Control valve body. 2-Load piston. 3-Stop. 4-Orifice. 5-Check valve. 6-Directional spool valve. 7-Port to sump. 8-Port to sump. 9-Port to astern clutch. 10-Pressure regulating springs. 11-Ball check valve. 12-Port to oil cooler. 13-Port to ahead clutch. 14-Oil inlet port. 15-Port to sump. 16-Bypass valve.Any oil which may leak by the directional spool (6) returns to the sump through return ports (7) and (15).When the directional spool valve is again moved to NEUTRAL,

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