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Caterpillar Cat 345B Excavator (Prefix 2NW) Service Repair Manual (2NW00001 and up)

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Caterpillar Cat 345B Excavator (Prefix 2NW) Service Repair Manual (2NW00001 and up)

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  1. Service Repair Manual Models 345BExcavator

  2. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEBP2... 1/29 Shutdown SIS Previous Screen Product: EXCAVATOR Model: 345B EXCAVATOR 2NW Configuration: 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine Disassembly and Assembly 345B, 345B Series II and W345B Series II Excavators Machine Systems Media Number -SENR1934-11 Publication Date -01/01/2012 Date Updated -12/01/2012 i01193176 Main Control Valve - Disassemble SMCS - 5051-015 S/N - 2NW1-UP S/N - 2SW1-UP S/N - 2ZW1-UP S/N - 3MW1-UP S/N - 4SS1-UP S/N - 5WS1-UP S/N - 6MW1-UP S/N - 6XS1-UP S/N - 7KS1-UP S/N - 8KW1-UP S/N - 8RW1-UP S/N - 9CW1-UP S/N - 9GS1-UP S/N - AGS1-UP S/N - AKJ1-UP S/N - AKX1-UP https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  3. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEBP2... 2/29 S/N - ALB1-UP S/N - ALD1-UP S/N - AMD1-UP S/N - AMJ1-UP S/N - AMN1-UP S/N - APB1-UP S/N - AYR1-UP S/N - BFG1-UP S/N - CCC1-UP S/N - DCW1-UP S/N - DET1-UP S/N - FEE1-UP Disassembly Procedure Start By: A. Remove the main control valve. Refer to Disassembly and Assembly, "Main Control Valve - Remove". Note: Put identification marks on all of the components of the main control valve as the components are being removed. All of the parts must be reinstalled in the part's original location. Do not damage any of the internal parts during the removal. Keep all of the internal parts of the valve clean and lubricated. 1. Thoroughly clean the outside of the main control valve prior to disassembling the main control valve. 2. The weight of the main control valve is 454 kg (1000 lb). Swing Priority Valve https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  4. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEBP2... 3/29 Illustration 1 g00638555 1. Remove swing priority valve (2) . Note: There is spring force against swing priority valve (2). When four bolts (1) that hold the swing priority valve in place are removed, the spring force will be released. To prevent possible personal injury, hold swing priority valve (2) in place by hand as bolts (1) are being removed. 2. While you hold swing priority valve (2) in place, slowly remove four bolts (1) . 3. Remove swing priority valve (2) from the main valve body. Illustration 2 g00638556 4. Remove spring (3) from the main valve body. https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  5. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEBP2... 4/29 Illustration 3 g00638557 5. Remove check valve (4) from the main valve body. 6. Disassemble swing priority valve (2), as follows: Illustration 4 g00638763 a. Remove O-ring seals (5) and (6) from the valve body. Illustration 5 g00638765 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  6. https://www.aservicemanualpdf.com/ My Dear Friend! Thank you very much for visiting. Full manual if required, please enter the following URL into your browser. https://www.aservicemanualpdf.com/

  7. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEBP2... 5/29 b. Remove plug (7) . c. Remove plug (13), valve (11), spool (10) and spring (9) from the valve body. d. Remove O-ring seal (8) from plug (7) . e. Remove O-ring seal (12) from plug (13) . Check valve for the Stick I Control Valve 1. Remove the check valve from the stick I control valve, as follows. Illustration 6 g00638768 2. Remove plate (14) from the stick I control valve. Remove O-ring seal (15) from the plate. Illustration 7 g00638780 3. Remove pilot valve (16) from the stick I control valve. https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  8. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEBP2... 6/29 Illustration 8 g00638782 4. Remove spring (17) from the stick I control valve. Illustration 9 g00638783 5. Remove check valve (18) from the stick I control valve. Illustration 10 g00638786 6. Remove sleeve (19) and two shims (20) from the stick I control valve. https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  9. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEBP2... 7/29 Illustration 11 g00638787 1. Remove adapter (21) from the front of the main valve body. Illustration 12 g00638836 2. Remove O-ring seal (22) from adapter (21) . Load Check Valves https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  10. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEBP2... 8/29 Illustration 13 g00638841 1. Remove six load check valves (23) from the main control valve, as follows: Illustration 14 g00638838 a. Remove six plugs (27), six springs (25), and six check valves (24) from the main valve body. b. Remove O-ring seal (26) from each plug (27) . Check Valves for the Straight Travel Control Valve https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  11. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEBP2... 9/29 Illustration 15 g00638844 1. Remove two check valves (28) from the straight travel control valve, as follows: Illustration 16 g00638848 a. Remove two plugs (31) from the main valve body. b. Remove O-ring seal (29) and backup ring (30) from each plug. https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  12. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEB... 10/29 Illustration 17 g00638851 c. Remove two springs (33) and two check valves (32) from the left travel control valve and the right travel control valve. Check Valves for the Left Travel Control Valve and the Right Travel Control Valve Illustration 18 g00638858 1. Remove two check valves (34) from the travel control valves, as follows: https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  13. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEB... 11/29 Illustration 19 g00638861 a. Remove two plugs (36). Remove O-ring seal (35) from each plug (36) . Illustration 20 g00638862 b. Remove two sleeves (37) from the travel control valves. Check Valve for the Boom II Control Valve Illustration 21 g00638863 1. Remove check valve (38) from the boom II control valve, as follows: https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  14. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEB... 12/29 Illustration 22 g00638878 a. Remove plug (42), spring (40) and check valve (39) from the Boom II Control Valve. b. Remove O-ring seal (41) from plug (42) . Line Relief Valves Illustration 23 g00638926 Illustration 24 g00638940 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  15. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEB... 13/29 1. Remove line relief valve (43), (44) and (45) from the top of the main valve. Remove line relief valve (46), (47), and (48) from the bottom of the main valve. Note: Only the O-ring seals and backup rings in line relief valves (43), (44), (45), (46), (47), and (48) are serviceable. Illustration 25 g00638941 2. Disassemble line relief valves (43), (44), (45), (46), (47), and (48), as follows: a. Separate adapter (50) from adapter (66) . b. Remove cap (61) from adjusting screw (60) . c. Mark the location of nut (68) with a suitable pencil. Unscrew nut (68) from adjusting screw (60). Make sure that you note the number of turns that are needed to remove nut (68). The valve must be reset if the number of turns are not documented. d. Remove spring (67) and needle valve (57) . e. Remove sleeve (51), valve (53), valve (63), spring (54), and spring (64) from the bottom half of the relief valve. f. Remove O-ring seal (49) from adapter (50) . g. Remove O-ring seal (52) and backup ring (62) from valve (53) . h. Remove seal (55), backup ring (65), and O-ring seal (56) from adapter (66) . i. Remove O-ring seals (58) and (59) from nut (68) . Plug for the Attachment Control Valve https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  16. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEB... 14/29 Illustration 26 g00638943 Illustration 27 g00638944 1. Remove plug (69) from the attachment control valve. 2. Remove O-ring seal (70), backup ring (71), and O-ring seal (72) from plug (69) . Main Relief Valve Illustration 28 g00638945 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  17. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEB... 15/29 1. Remove main relief valve (73) from the main valve body. 2. Disassemble main relief valve (73), as follows: Illustration 29 g00638946 Illustration 30 g00638949 a. Remove nut (74) and adjuster (76) from adapter (77) . b. Remove adapter (77), spring (79) and valve (80) from valve body (84) . c. Remove O-ring seal (78) from adapter (77) . d. Remove O-ring seal (75) from adjuster (76) . e. Disassemble valve body (84). Remove seat (81), spring (82) and valve (83) from valve body (84) . f. Remove O-ring seals (85), (86) and (87) from valve body (84) . https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  18. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEB... 16/29 Illustration 31 g00638955 g. Remove ring (89), collar (88) and the filter from valve (83). Relief Valve for Negative Flow Control Illustration 32 g00638957 1. Remove two relief valves (90) for the negative flow control from the main valve bodies. 2. Disassemble the two relief valves for negative flow control, as follows: https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  19. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEB... 17/29 Illustration 33 g00638969 a. Remove plug (97), spring (92) and valve (91) from valve body (95) . b. Remove O-ring seal (96) from plug (97) . c. Remove O-ring seal (93) and O-ring seal (94) from valve body (95) . Straight Travel Stem Assembly Illustration 34 g00638971 1. Remove plug (98) from the main valve body. Illustration 35 g00638972 2. Remove O-ring seal (99) from plug (98) . https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  20. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEB... 18/29 Illustration 36 g00638973 3. Remove stem (100) for straight travel from the main valve body. 4. Disassemble the stem (100) for straight travel, as follows: Illustration 37 g00638974 a. Remove piston (107) from spool (106) . b. Remove plug (101), dowel (103), spring (104) and valve (105) from spool (106) . c. Remove O-ring seal (102) from plug (101) . Drift Reduction Valves https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  21. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEB... 19/29 Illustration 38 g00638975 Illustration 39 g00638976 1. Remove the stick drift reduction valve (108) and the boom drift reduction valve (108) . Illustration 40 g00638977 2. Remove spring (109), valve (110), and barrel (111) from the main valve body. 3. Remove backup ring (112) and O-ring seal (113) from barrel (111) . https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  22. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEB... 20/29 Note: The disassembly for the stick drift reduction valve and the boom drift reduction valve is identical. 4. Disassemble stick drift reduction valve (108), as follows: Illustration 41 g00638979 a. Remove bolts (123) and separate valve (114) from adapter (120) . b. Remove spool (116), guide (117) and spring (118) . c. Remove O-ring seals (115) and (123) from valve (114) . d. Remove seal (124) from adapter (120) . e. Remove backup ring (121), O-ring seal (122), backup ring (125) and O-ring seal (126) from adapter (120) . Stem Assemblies for the Main Control Valve Illustration 42 g00638980 1. Remove bolts (127) that hold nine housings (128) to the main valve bodies. https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  23. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEB... 21/29 2. Remove the nine housings. Illustration 43 g00638982 3. Remove O-ring seal (129) from each housing (128) . Illustration 44 g00638983 4. Remove the stems for boom II (130), swing (132), right travel (134), bucket (136), and stick II (138) from the main valve bodies. 5. Remove the stems for stick I (131), left travel (133), attachment (135), and boom I (137) from the main valve bodies. 6. Disassemble the stems for boom II (130), swing (132), right travel (134), bucket (136), and stick II (138), as follows: https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  24. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEB... 22/29 Illustration 45 g00638984 a. Remove bolt (139) from the end of spool (143) . b. Remove retainer (140), spring (141) and retainer (142) from spool (143) . Note: The disassembly for the stem for right travel (134) and the stem for left travel (133) is identical as the previous stems except the stems for travel have an adapter. Illustration 46 g00638985 7. Remove O-ring seals (144), (146) and (147) from adapter (145) . 8. Disassemble the stem for boom I (137), as follows: https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  25. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEB... 23/29 Illustration 47 g00638986 a. Remove plug (156), spring (154), valve (153), valve (152), spring (151), valve (150), and spring (149) from spool (148) . b. Remove O-ring seal (155) from plug (156) . Illustration 48 g00638987 c. Remove bolt (157) and washer (158) from the other end of spool (148) . d. Remove retainer (160), spring (161), and retainer (162) from the end of rod (159) . e. Remove rod (159) . f. Remove spring (163) and valve (164) from the end of spool (148) . g. Remove O-ring seal (165) from rod (159) . Stroke Limiter for Tamping Mode https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  26. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEB... 24/29 Illustration 49 g00638988 Note: There is spring force against stroke limiter (167). When two bolts (166) that hold stroke limiter (167) in position are removed the spring force will be released. To prevent possible personal injury, hold stroke limiter (167) in place by hand as two bolts (166) are being removed. 1. While you hold stroke limiter (167) in place, slowly remove two bolts (166). Remove stroke limiter (167) from the main valve body. 2. Disassemble stroke limiter (167), as follows: Illustration 50 g00639012 a. Remove plug (168) from valve body (170) . b. Remove spacer (172), spring (173) and piston (174) from valve body (170) . c. Remove O-ring seal (169) from plug (168) . d. Remove O-ring seal (171) from valve body (170) . Regeneration Valve for the Stick https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

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  28. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEB... 25/29 Illustration 51 g00639036 1. Remove four bolts (175) from the regeneration valve (176) for the stick. 2. Disassemble the regeneration valve (176) for the stick, as follows: Illustration 52 g00639038 a. Remove spring (179), spool valve (180), rod (181), spring (182), valve (183), and pin (185) from valve body (177) . b. Remove O-ring seals (178), and (184) from valve body (177) . https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  29. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEB... 26/29 Illustration 53 g00639039 3. Remove bolts (186) and nine housings (187) from the main valve bodies. Illustration 54 g00639041 4. Remove O-ring seal (188) from each housing (187) . Illustration 55 g00639044 5. Remove spring (189) from the stem for straight travel. https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  30. 345B Excavator 2NW00001-UP (MACHINE) POWERED BY 3176C Engine(SEB... 27/29 Illustration 56 g00639046 6. Remove seat (190) from the stem for straight travel. Illustration 57 g00639051 7. Remove two sensors (191) and plug (192) . Illustration 58 g00639054 8. Remove O-ring seal (193) from sensors (191) . https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/9/12

  31. https://www.aservicemanualpdf.com/ My Dear Friend! Thank you very much for visiting. Full manual if required, please enter the following URL into your browser. https://www.aservicemanualpdf.com/

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