2905742 VALVE AR-STICK LOWERING CONT Caterpillar parts
323D L
Rating:
Alternative (cross code) number:
CA2905742
290-5742
2905742
CA2905742
290-5742
2905742
EXCAVATOR,
Compatible equipment models: 2905742:
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Information:
The STICK IN operation contains a regeneration circuit. When the joystick for the stick is moved to the STICK IN position, stick regeneration valve (31) and stick unloading valve (32) are operational in the stick hydraulic circuit. The return oil from the rod end of stick cylinder (1) is supplied to the head end of the stick cylinder. The regeneration circuit makes more effective use of the return oil from the stick cylinder. This allows the oil delivery from the idler pump and the drive pump to perform other implement functions during a STICK IN operation.When the joystick for the stick is moved to the STICK IN position, pilot oil from pilot control valve (27) flows through pilot line (33). The pilot oil flow then divides into several flow paths. Part of the pilot oil flows through pilot line (34), pilot line (35) and pilot line (36) to stick I control valve (21). The pilot oil in pilot line (36) also flows through passage (37) in stick drift reduction valve (5). Part of the pilot oil flows through pilot line (38) to stick regeneration valve (31). The remainder of the pilot oil flows through pilot line (39), the pressure reducing valve for boom priority (40) and pilot line (41) to stick II control valve (13).Since the pilot oil pressure has caused the spool in stick I control valve (21) to shift downward, the oil delivery from the idler pump flows through center bypass passage (18), load check valve (15), stick I control valve (21) and passage (9) to line (2).The pilot oil pressure in pilot line (41) has caused the spool in stick II control valve (13) to shift downward. Part of the oil delivery from the drive pump that is in center bypass passage (12) flows through check valve (16) and stick II control valve (13) to line (42). The remainder of the oil delivery from the drive pump flows through parallel feeder passage (22), check valve (19) and stick II control valve (13) to line (42). All of the oil delivery from the drive pump in line (42) flows to line (2) and combines with the oil delivery from the idler pump. The combined pump oil flows to the head end of stick cylinder (1).The return oil from the rod end of the stick cylinder flows through line (3) to stick drift reduction valve (5). Valve (4) in the stick drift reduction valve shifts to the left and the return oil enters passage (43). Part of the return oil in passage (43) flows through stick I control valve (21), return passage (10) and return line (23) to the hydraulic tank. The remainder of the return oil flows through the regeneration circuit to the head end of the stick cylinders.Stick In (Slow)
Illustration 4 g01335468
Hydraulic schematic for STICK IN (slow without regeneration)
(1) Stick cylinder
(2) Line (oil flow to stick cylinder rod end)
(3) Line (oil flow from stick cylinder head end)
(4) Valve
(5) Stick drift reduction valve
(6) Main control valve
(9) Passage
(10)
Illustration 4 g01335468
Hydraulic schematic for STICK IN (slow without regeneration)
(1) Stick cylinder
(2) Line (oil flow to stick cylinder rod end)
(3) Line (oil flow from stick cylinder head end)
(4) Valve
(5) Stick drift reduction valve
(6) Main control valve
(9) Passage
(10)
Caterpillar SIS machinery equipment:
Parts valve Caterpillar catalog:
320C, 320C FM, 320C L, 320D, 320D FM, 320D FM RR, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 320D2, 320D2 GC, 320D2 L, 320E, 320E L, 320E LN, 320E LRR, 320E RR, 321C, 321D LCR, 323D L, 323D LN, 323D...
307B, 307C, 308C, 311B, 311C, 311D LRR, 311F LRR, 312B, 312B L, 312C, 312C L, 312D, 312D L, 312D2, 312D2 GC, 312D2 L, 312E, 312E L, 313B, 313D, 313D2, 313D2 LGP, 314C, 314D CR, 314D LCR, 314E CR, 314E...
1090, 1190, 1190T, 1290T, 1390, 2290, 2390, 2391, 2491, 2590, 311D LRR, 312D, 315D L, 318C, 319C, 320B, 320B FM LL, 320B L, 320C, 320C FM, 320C L, 320D, 320D FM, 320D L, 320D LRR, 320D RR, 321C, 321D ...
307D, 308D, 311B, 311C, 311D LRR, 311F LRR, 312B, 312B L, 312C, 312C L, 312D, 312D L, 312D2, 312D2 GC, 312D2 L, 312E, 312E L, 313D, 313D2, 313D2 LGP, 314C, 314D CR, 314D LCR, 314E CR, 314E LCR, 315B, ...
1090, 1190, 1190T, 120G, 120H, 120H ES, 120H NA, 120K, 120K 2, 120M, 120M 2, 1290T, 12G, 12H, 12H ES, 12H NA, 12K, 12M, 12M 2, 12M 3, 12M 3 AWD, 130G, 135H, 135H NA, 1390, 140B, 140G, 140H, 140H ES, 1...
305.5, 306, 307C, 307D, 308C, 308D, 311C, 311D LRR, 312C, 312C L, 312D, 312D L, 312D2, 312D2 GC, 312D2 L, 312E, 312E L, 313D, 313D2, 313D2 LGP, 314C, 314D CR, 314D LCR, 314E CR, 314E LCR, 315D L, 316E...
305.5, 306, 306E, 307B, 307C, 307D, 308C, 308D, 311, 311B, 311C, 311D LRR, 312B, 312B L, 312C, 312C L, 312D, 312D L, 313B, 314C, 314D CR, 314D LCR, 315, 315B, 315B L, 315C, 315D L, 317B LN, 318B, 318C...
311D LRR, 312D, 312D L, 313D, 314D CR, 314D LCR, 315D L, 318D L, 319D, 319D L, 319D LN, 320D, 320D FM, 320D FM RR, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 321D LCR, 323D L, 323D LN, 323D SA
311D LRR, 312D, 312D L, 313D, 314D CR, 314D LCR, 315D L, 318D L, 319D, 319D L, 319D LN, 320D, 320D FM, 320D FM RR, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 321D LCR, 323D L, 323D LN, 323D SA
2824950
VALVE GP-LOAD CONTROL
324D, 324D LN, 325D, 325D L
324D, 324D LN, 325D, 325D L
2851343
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325D, 325D L, 329D L, 329D LN
325D, 325D L, 329D L, 329D LN
2911715
VALVE AR-LOAD CONTROL
325D, 325D L
325D, 325D L
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VALVE AR-CHECK & RELIEF
325D, 325D L
325D, 325D L
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VALVE & MTG GP-MAIN CONTROL
325D, 325D L
325D, 325D L
1375255
VALVE GP-CONTROL
651E, 657G
651E, 657G
2851340
VALVE GP-CONTROL
320D, 320D FM, 320D L, 320D2, 320D2 L, 323D L, 323D LN, 323D SA, 323D2 L
320D, 320D FM, 320D L, 320D2, 320D2 L, 323D L, 323D LN, 323D SA, 323D2 L
2851339
VALVE GP-CONTROL
323D L, 323D LN, 323D SA
323D L, 323D LN, 323D SA