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BRACKET A 5V3393 - Caterpillar



5V3393 BRACKET A Caterpillar parts BRACKET
Rating:
11
Alternative (cross code) number:
CA5V3393
5V-3393
5V3393
Caterpillar 5V3393 BRACKET A
Weight: 340 pounds 154 kg.

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Illustration 4 g00940969
(5) Solenoid valve for clutch pack 5 (26) Piston (27) Spring (28) Decay orifice (29) Piston (30) Spool (31) Modulation orifice (32) Spring (33) Slug (34) SpringThere are five modulation reducing valves. Four of the modulation reducing valves are located on selector and pressure control valve (10) . One modulation reducing valve is located on selector and pressure control valve (9) . The five modulation reducing valves provide individual pressure control for each clutch pack. The modulation reducing valves provide different pressures for the clutches (speed and range). The different pressures are obtained through different combinations of springs and orifices.In order to pressurize number five clutch pack, solenoid (5) is energized with a 24 volt signal from the electronic control module. The electronic control module is activated by the transmission control (lever). Piston (26) moves toward the center of the valve. Piston (29) and spool (30) move away from the center of the valve. Oil from the supply passes across the modulation reducing valve in order to fill the clutch.When the clutch is full of oil, the oil flows through orifice (31) that is contained in spool (30) . Piston (29) moves toward piston (26) . Spring (27) is compressed. The clutch pressure rises gradually.In order to disengage the transmission clutch, the solenoid is de-energized. Piston (26) moves away from the center of the valve. The piston connects decay orifice (28) to the drain. Oil in the cavity of load piston (29) drains through decay orifice (28) . The clutch pressure drops off gradually.Proportional Solenoid Valves
Illustration 5 g01091323
(3) Proportional solenoid valve for clutch pack 3 (35) Spacer (36) Orifice (37) Filter (38) Passage (39) Spool (40) Spring (41) Spring (42) Slug (43) Chamber (44) Supply oil (45) BallProportional solenoid valves connect oil from the supply to the corresponding direction clutches. There are three proportional solenoid valves that are located on selector and pressure control valve (9) .Supply oil in passage (44) passes through filter (37) and flows through orifice (36) , and passes by ball (45) . In order to pressurize number three clutch pack, current from the electronic control module is applied to proportional solenoid (3) . The flow is restricted past ball (45) by proportional solenoid valve (3) . The restriction to the flow of oil generates pilot pressure. The pilot pressure forces spool (39) to the right. Spool (39) allows oil from the main relief valve to flow to the clutch pack. The clutch pack will fill with oil. When the clutch pack is full of oil, the pressure gradually begins to increase. Oil from the clutch pack will flow through passage (38) in spool (39) and flow into chamber (43) . The oil acts on spool (39) in order to generate a force. The force that is generated plus the force from spring (40) opposes the force on spool (39) that is generated by the pilot pressure. The two forces act on the spool in order to achieve a balance of forces. The


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