3930745 INSERT Caterpillar parts
CW-34
Rating:
Alternative (cross code) number:
CA3930745
393-0745
3930745
CA3930745
393-0745
3930745
Weight: 0.01 pounds 0 kg.
PNEUMATIC COMPACTOR,
Compatible equipment models: 3930745:
Number on catalog scheme:
8
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Information:
Standby
Main hydraulic pump (10) operates in the standby operation when no flow is required by the implements. Standby of main hydraulic pump (10) provides the hydraulic system with minimum flow at low pressure. The pump is fully destroked until the implements send a signal that requires flow.When main hydraulic pump (10) is in standby, unloading can occur. For more information on pump unloading, refer to Systems Operation, "Pump Control (Main Hydraulic) - Unload"Upstroke
Illustration 2 g03821105
Regulation of pump flow (upstroke)
(1) Pressure cutoff spool
(2) Load sense spool
(3) Load sense (LS) signal
(4) Load sense spring
(5) Pressure cutoff spring
(6) Torque control solenoid
(7) Torque control spool
(8) Swashplate control piston
(9) Swashplate
(10) Main hydraulic pump
(11) Supply pressure
(12) Bias spring When torque control spool (7), pressure cutoff spool (1), and load sense spool (2) are held in the neutral position, main hydraulic pump (10) upstrokes The three control spools are held in the neutral position by spring pressure. Swashplate control piston (8) shifts to the right and moves swashplate (9) to the maximum angle. The increase of the swashplate angle to the maximum increases the flow of hydraulic fluid from main hydraulic pump (10).Constant Flow Control
Illustration 3 g03821079
Regulation of pump flow (constant flow)
(1) Pressure cutoff spool
(2) Load sense spool
(3) Load sense (LS) signal
(4) Load sense spring
(5) Pressure cutoff spring
(6) Torque control solenoid
(7) Torque control spool
(8) Swashplate control piston
(9) Swashplate
(10) Main hydraulic pump
(11) Supply pressure
(12) Bias spring During the state of constant flow pump operation, the position of control spools (7) and (2) will vary. This action will control the output of hydraulic pump (10). The varying positions of torque control spool (7) and load sense control spool (2) control the upstroke and destroke of the pump during constant flow. Pressure cutoff spool (1) will remain held in the neutral position by the force applied by pressure cutoff spring (5). When the maximum system pressure is reached, hydraulic pump (10) will unload.When the forces are balanced, hydraulic pump (10) will produce relatively constant flow until the flow demand changes. Pump output will vary to allow the pressure and the flow to remain constant.Destroke
Illustration 4 g03821083
Regulation of pump flow (destroke)
(1) Pressure cutoff spool
(2) Load sense spool
(3) Load sense (LS) signal
(4) Load sense spring
(5) Pressure cutoff spring
(6) Torque control solenoid
(7) Torque control spool
(8) Swashplate control piston
(9) Swashplate
(10) Main hydraulic pump
(11) Supply pressure
(12) Bias spring When less flow is needed, hydraulic pump (10) destrokes. Destroking to minimum oil flow is accomplished by the shifting of load sense spool (2) to the right. The position of torque control spool (7) varies, and pressure cutoff spool (1) remains in neutral position. Oil pressure at head end of swashplate control piston (8) overcomes the tension of bias spring (12) allowing swashplate control piston (8) to shift to the left. Swashplate control piston (8) changes the angle of swashplate (9), thus destroking the pump.As pump flow is reduced, the force on the right side of load sense spool (2) overcomes spring pressure. This action lets main hydraulic pump (10) supply only the oil needed to meet the
Main hydraulic pump (10) operates in the standby operation when no flow is required by the implements. Standby of main hydraulic pump (10) provides the hydraulic system with minimum flow at low pressure. The pump is fully destroked until the implements send a signal that requires flow.When main hydraulic pump (10) is in standby, unloading can occur. For more information on pump unloading, refer to Systems Operation, "Pump Control (Main Hydraulic) - Unload"Upstroke
Illustration 2 g03821105
Regulation of pump flow (upstroke)
(1) Pressure cutoff spool
(2) Load sense spool
(3) Load sense (LS) signal
(4) Load sense spring
(5) Pressure cutoff spring
(6) Torque control solenoid
(7) Torque control spool
(8) Swashplate control piston
(9) Swashplate
(10) Main hydraulic pump
(11) Supply pressure
(12) Bias spring When torque control spool (7), pressure cutoff spool (1), and load sense spool (2) are held in the neutral position, main hydraulic pump (10) upstrokes The three control spools are held in the neutral position by spring pressure. Swashplate control piston (8) shifts to the right and moves swashplate (9) to the maximum angle. The increase of the swashplate angle to the maximum increases the flow of hydraulic fluid from main hydraulic pump (10).Constant Flow Control
Illustration 3 g03821079
Regulation of pump flow (constant flow)
(1) Pressure cutoff spool
(2) Load sense spool
(3) Load sense (LS) signal
(4) Load sense spring
(5) Pressure cutoff spring
(6) Torque control solenoid
(7) Torque control spool
(8) Swashplate control piston
(9) Swashplate
(10) Main hydraulic pump
(11) Supply pressure
(12) Bias spring During the state of constant flow pump operation, the position of control spools (7) and (2) will vary. This action will control the output of hydraulic pump (10). The varying positions of torque control spool (7) and load sense control spool (2) control the upstroke and destroke of the pump during constant flow. Pressure cutoff spool (1) will remain held in the neutral position by the force applied by pressure cutoff spring (5). When the maximum system pressure is reached, hydraulic pump (10) will unload.When the forces are balanced, hydraulic pump (10) will produce relatively constant flow until the flow demand changes. Pump output will vary to allow the pressure and the flow to remain constant.Destroke
Illustration 4 g03821083
Regulation of pump flow (destroke)
(1) Pressure cutoff spool
(2) Load sense spool
(3) Load sense (LS) signal
(4) Load sense spring
(5) Pressure cutoff spring
(6) Torque control solenoid
(7) Torque control spool
(8) Swashplate control piston
(9) Swashplate
(10) Main hydraulic pump
(11) Supply pressure
(12) Bias spring When less flow is needed, hydraulic pump (10) destrokes. Destroking to minimum oil flow is accomplished by the shifting of load sense spool (2) to the right. The position of torque control spool (7) varies, and pressure cutoff spool (1) remains in neutral position. Oil pressure at head end of swashplate control piston (8) overcomes the tension of bias spring (12) allowing swashplate control piston (8) to shift to the left. Swashplate control piston (8) changes the angle of swashplate (9), thus destroking the pump.As pump flow is reduced, the force on the right side of load sense spool (2) overcomes spring pressure. This action lets main hydraulic pump (10) supply only the oil needed to meet the
Caterpillar parts catalog:
Parts insert Caterpillar catalog:
120M, 120M 2, 12M, 12M 2, 12M 3, 12M 3 AWD, 140M, 140M 2, 140M 3, 140M 3 AWD, 14M, 160M, 160M 2, 160M 3, 160M 3 AWD, 16M, 216, 216B, 216B3, 226B, 226B3, 228, 232B, 236, 236B, 236B3, 236D, 2384C, 242B,...
120M, 12M, 2470C, 320D GC, 320D L, 323D L, 323D2 L, 420E, 430E, 450E, 535D, 545D, 553C, 559, 613G, 914G, 924H, 924HZ, 924K, 928H, 928HZ, 930K, 938H, 938K, 950 GC, 953D, 963D, AP-600D, AP-655D, AP1000E...
120M, 12M, 2470C, 320D GC, 320D L, 323D L, 323D2 L, 420E, 430E, 450E, 535D, 545D, 553C, 559, 613G, 914G, 924H, 924HZ, 924K, 928H, 928HZ, 930K, 938H, 938K, 950 GC, 953D, 963D, AP-600D, AP-655D, AP1000E...
3464772
INSERT-THREADED
120M 2, 2384C, 2484C, 2570C, 2670C, 312E, 312E L, 314E CR, 314E LCR, 316E L, 318E L, 320E, 320E L, 320E LN, 320E LRR, 320E RR, 323E L, 324E, 324E L, 324E LN, 329E, 329E L, 329E LN, 416F, 420F, 428F, 4...
120M 2, 2384C, 2484C, 2570C, 2670C, 312E, 312E L, 314E CR, 314E LCR, 316E L, 318E L, 320E, 320E L, 320E LN, 320E LRR, 320E RR, 323E L, 324E, 324E L, 324E LN, 329E, 329E L, 329E LN, 416F, 420F, 428F, 4...
2380029
INSERT-THREADED
966M, 966M XE, 972M, 972M XE, 980M, 982M, C13, C15, C15 I6, C18, C18 I6, C27, C32, C4.4, C6.6, C9, CW-34, D3G, D4G, D5G, D7E, D7E LGP
966M, 966M XE, 972M, 972M XE, 980M, 982M, C13, C15, C15 I6, C18, C18 I6, C27, C32, C4.4, C6.6, C9, CW-34, D3G, D4G, D5G, D7E, D7E LGP
1393176
INSERT-THREADED
3456, CW-14, CW-34, PF-290B, PS-150B, PS-150C, PS-200B, PS-360B, PS-360C
3456, CW-14, CW-34, PF-290B, PS-150B, PS-150C, PS-200B, PS-360B, PS-360C
3540132
INSERT-HEX
525D, 535D, 545D, 555D, 924K, 930K, 938K, CB-44B, CB-54B, CD-54B, CP-54B, CS-54B, CS-56B, CS-68B, CS-74B, CS-78B, CW-34
525D, 535D, 545D, 555D, 924K, 930K, 938K, CB-44B, CB-54B, CD-54B, CP-54B, CS-54B, CS-56B, CS-68B, CS-74B, CS-78B, CW-34
BU115, BU118, CB-22, CB-334D, CB-334E, CB-335D, CB-34, CB-434D, CB-534D, CB-564D, CB22B, CB24B, CB32B, CB34B, CB34B XW, CC24B, CC34B, CD-54, CD-54B, CP-433C, CS-431C, CW-34, PF-290B, PS-360B, PS-360C
1453846
INSERT-NYLON
CB-22, CB-334D, CB-334E, CB-335D, CB-434D, CB-44B, CB-534D, CB-54, CB-54B, CB-564D, CB-64, CD-54B, CP-433E, CP-44, CP-533E, CP-54B, CP-56, CP-573E, CP-64, CP-68B, CP-74B, CP-76, CS-423E, CS-433E, CS-4...
CB-22, CB-334D, CB-334E, CB-335D, CB-434D, CB-44B, CB-534D, CB-54, CB-54B, CB-564D, CB-64, CD-54B, CP-433E, CP-44, CP-533E, CP-54B, CP-56, CP-573E, CP-64, CP-68B, CP-74B, CP-76, CS-423E, CS-433E, CS-4...
1676778
INSERT-NYLON
CB-334D, CB-334E, CB-335D, CB-34, CB-434D, CB-534D, CD-54, CW-34
CB-334D, CB-334E, CB-335D, CB-34, CB-434D, CB-534D, CD-54, CW-34
3873219
INSERT
CW-34
CW-34
3760666
INSERT
CW-34
CW-34
3873219
INSERT
CW-34
CW-34
3907630
INSERT
CB-44B, CB-54B, CD-54B
CB-44B, CB-54B, CD-54B
4152449
INSERT-NYLON
CB-44B, CB-54B, CD-54B
CB-44B, CB-54B, CD-54B
2532590
INSERT-NYLON
CB-44B, CB-54B, CD-54, CD-54B
CB-44B, CB-54B, CD-54, CD-54B
2530277
INSERT-NYLON
CB-44B, CB-54B, CD-54, CD-54B
CB-44B, CB-54B, CD-54, CD-54B
2530963
INSERT-NYLON
CD-54
CD-54
7R7257
INSERT
CB-314
CB-314
7R7261
INSERT
CB-314
CB-314
3676529
INSERT-NYLON
CC24B, CC34B
CC24B, CC34B
1804221
INSERT-THREADED
AS3143
AS3143
3818653
INSERT-NYLON
CB22B, CB24B, CB32B, CB34B, CB34B XW, CC24B, CC34B
CB22B, CB24B, CB32B, CB34B, CB34B XW, CC24B, CC34B
3760666
INSERT
CW-34
CW-34