Caterpillar Cat 374D L Excavator (Prefix PAX) Service Repair Manual Instant Download

Service Repair Manual Models 374DL Excavator

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP52... 1/9 Shutdown SIS Previous Screen Product: EXCAVATOR Model: 374D L EXCAVATOR PAX Configuration: 374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine Disassembly and Assembly 374D Excavator Machine Systems Media Number -KENR6406-01 Publication Date -01/02/2012 Date Updated -23/02/2012 i03768729 Travel Motor - Assemble SMCS - 4351-016 Assembly Procedure Table 1 Required Tools Tool Part Number Part Description Qty A 138-7573 Link Bracket 1 B 1P-1861 Retaining Ring Pliers As 1 C 6V-2055 Grease 1 D 128-5049 Guide Stud 2 Illustration 1 g02002733 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP52... 2/9 1. Lubricate actuator piston (43) with hydraulic oil. Install actuator piston (43) into housing (2). Install plug (42). Tighten plug (42) to a torque of 430 40 N m (315 30 lb ft). Illustration 2 g02002734 2. Install shaft seal (41). Use Tooling (B) in order to install retaining ring (44) . Illustration 3 g02002735 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

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374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP52... 3/9 Illustration 4 g02002736 3. Use a suitable press to install bearing (39) onto shaft assembly (29). Bearing (39) must be installed with retaining clip (X) toward the barrel assembly. Illustration 5 g02001794 4. Install shaft assembly (29). Install the key and pin assemblies (38) . Illustration 6 g02001793 5. Install swashplate (37) into motor housing (2) . https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP52... 4/9 Illustration 7 g02002633 6. Install barrel spacer (36), washers (35), thick spacer (34), thin spacer (33), and bearing 32 onto barrel assembly (27) . Illustration 8 g02002634 7. Install piston assemblies (31), and plate (30) onto barrel assembly (27) . Illustration 9 g02006773 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP52... 5/9 8. Wrap a piece of nylon string around the pistons (31), as shown. Install barrel assembly (27) into the pump housing. Use the nylon string in order to hold the assembly together during installation. Remove the nylon string. Illustration 10 g02007094 Illustration 11 g02006998 9. Install the brake discs (28). Start with brake disc (Y). Alternate between brake discs (Y) and brake discs (Z) with brake discs (Y) on the top and the bottom. https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP52... 6/9 Illustration 12 g02002313 10. Install O-ring seal (26) and backup ring (27) onto the brake piston (22). Install O-ring seal (25) and backup ring (24) onto the brake piston (22). Illustration 13 g02001773 11. Install O-ring seals (23) onto motor housing (2). Install springs (21) onto brake piston (22) . Illustration 14 g02002474 12. Install balls (20), O-ring seals (19), backup rings (18), and retainers (17) into head (3) . https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP52... 7/9 Illustration 15 g02002213 Improper assembly of parts that are spring loaded can cause bodily injury. To prevent possible injury, follow the established assembly procedure and wear protective equipment. 13. Install spring (13), spool (14), and adapter (15). Tighten adapter (15) to a torque of 115 10 N m (85 7 lb ft). Install elbow (16) . Illustration 16 g02002033 14. Install ball (9), spring (10), and orifice (11). Tighten orifice (11) to a torque of 7 1 N m (62 9 lb in). Install bearing (8). Install adapter (7) and elbow (6) . https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP52... 8/9 Illustration 17 g02001974 15. Apply Tooling (C) to the back side of plate (5) in order to hold plate (5) in place during assembly. Install plate (5) to head (3) . Illustration 18 g02002738 Improper assembly of parts that are spring loaded can cause bodily injury. To prevent possible injury, follow the established assembly procedure and wear protective equipment. https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP52... 9/9 Illustration 19 g02001760 16. Install Tooling (D) to housing (2). Install head (3) onto motor housing (2). Use a suitable lifting device to install head (3). The weight of the head (3) is approximately 40 kg (90 lb). Remove Tooling (A) and Tooling (D). Install bolts (4). Tighten bolts (4) to a torque of 530 70 N m (390 50 lb ft). Illustration 20 g02001733 17. Install O-ring seal (1) onto motor housing (2) . End By: Install the travel motor. Refer to Disassembly and Assembly, "Travel Motor - Remove & Install". Copyright 1993 - 2020 Caterpillar Inc. Wed Nov 4 00:56:03 UTC+0800 2020 All Rights Reserved. Private Network For SIS Licensees. https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP52... 1/3 Shutdown SIS Previous Screen Product: EXCAVATOR Model: 374D L EXCAVATOR PAX Configuration: 374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine Disassembly and Assembly 374D Excavator Machine Systems Media Number -KENR6406-01 Publication Date -01/02/2012 Date Updated -23/02/2012 i07285033 Final Drive - Remove and Install SMCS - 4050-010 Removal Procedure Table 1 Required Tools Tool Part Number Part Description Qty 132-8223 Power Pack 1 A 132-8119 Hydraulic Torque Wrench Assembly 1 B - Loctite 243 - Start By: a. Remove the final drive sprocket. b. Remove the travel motor. Note: The final drive sprocket does not need to be removed prior to removal of the final drive. The sprocket should be removed to disassemble the final drive. Note: The travel motor does not need to be removed prior to removal of the final drive. The travel motor should be removed to disassemble the final drive. NOTICE Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP52... 2/3 before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products. Dispose of all fluids according to local regulations and mandates. Illustration 1 g00595681 1. Attach a suitable lifting device to final drive (1). The weight of final drive (1) is approximately 817 kg (1800 lb). Illustration 2 g00874668 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP52... 3/3 Illustration 3 g00874687 Note: Mark the location of mounting bolt holes (Z) for the travel motor for installation purposes. 2. Use Tooling (A) to remove bolts (2). Use the suitable lifting device to remove the final drive. Installation Procedure 1. Install final drive (1) in the reverse order of removal. a. Apply Tooling (B) to bolts (2). b. Tighten bolts (2) to a torque of 500 50 N m (369 37 lb ft). Turn bolts (2) an additional 50 5 . Copyright 1993 - 2020 Caterpillar Inc. Wed Nov 4 00:56:59 UTC+0800 2020 All Rights Reserved. Private Network For SIS Licensees. https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP52... 1/12 Shutdown SIS Previous Screen Product: EXCAVATOR Model: 374D L EXCAVATOR PAX Configuration: 374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine Disassembly and Assembly 374D Excavator Machine Systems Media Number -KENR6406-01 Publication Date -01/02/2012 Date Updated -23/02/2012 i02388153 Final Drive - Disassemble SMCS - 4050-015 Disassembly Procedure Table 1 Required Tools Tool Part Number Part Description Qty A 1P-2420 Transmission Repair Stand 1 B 138-7575 Link Bracket 3 C 138-7576 Link Bracket 2 132-8119 Hydraulic Wrench 1 D 132-8223 Hydraulic Pump and Motor Gp 1 (1) Hex Bit Socket 9U-7418 1 E 176-6536 Forcing Bolt 2 ( 1 ) Cut the tool to length (X). Length (X) is equal to 14 mm (0.55 inch). Refer to Step 27 for the correct modification. Start By: A. Remove the final drive. Refer to Disassembly and Assembly, "Final Drive - Remove". 1. Thoroughly clean the outside of the final drive prior to disassembly. https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP52... 2/12 Illustration 1 g00865168 2. Fasten the final drive to Tooling (A). Put an alignment mark across the sections of the final drive for assembly purposes. All parts must be reinstalled in the original locations. The weight of the final drive is approximately 817 kg (1800 lb). Illustration 2 g00865172 3. Remove socket head bolts (1) from the final drive cover. Illustration 3 g01192344 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP52... 3/12 4. Attach Tooling (C) and a suitable lifting device to cover (2). The weight of cover (2) is approximately 66 kg (145 lb). 5. Remove bolts (3). Use a suitable hammer to break the seal between cover (2) and the ring gear. Remove cover (2). Illustration 4 g00865183 6. Remove spacer (4) and the shims from the cover. 7. Remove socket head bolts (5) and ring gear (6) from the cover. Illustration 5 g00865487 8. Remove sun gear (7) . https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP52... 4/12 Illustration 6 g00865501 9. Use Tooling (B) and a suitable lifting device to remove carrier assembly (8). The weight of carrier assembly (8) is approximately 30 kg (55 lb). Illustration 7 g00865534 10. Remove retaining ring (9), spacer (10), and sun gear (11) . Illustration 8 g00865551 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP52... 5/12 11. Drive spring pin (13) into shaft (14). Remove shaft (14) and gear assembly (12) . Illustration 9 g00865614 12. Remove washers (15) and bearing (16) from gear (17). Remove spring pin (13) from shaft (14) . 13. Repeat Steps 11 and 12 for the remaining gear assemblies. Illustration 10 g00865671 14. Use Tooling (B) and a suitable lifting device to remove carrier assembly (18). The weight of carrier assembly (18) is approximately 68 kg (150 lb). https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP52... 6/12 Illustration 11 g00865717 15. Remove retaining ring (19), spacer (20), and gear assembly (21) . Illustration 12 g00865736 16. Drive spring pin (22) into planetary shaft (24). Remove planetary shaft (24) and gear assembly (23) . Illustration 13 g00865753 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP52... 7/12 17. Remove thrust washers (27) and bearing (26) from planetary gear (25). Remove spring pin (22) from shaft (24) . 18. Repeat Steps 16 and 17 for the remaining gear assemblies. Illustration 14 g01192348 19. Use Tooling (C) and a suitable lifting device to remove carrier assembly (28). The weight of carrier assembly (28) is approximately 107 kg (235 lb). 20. Remove spacer (29) . Illustration 15 g00865872 21. Drive spring pin (31) into shaft (32). Remove planetary shaft (32) and gear assembly (30) . https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP52... 8/12 Illustration 16 g00865884 22. Remove thrust washers (33) and (37), and bearings (34) and (36) from planetary gear (35). Remove spring pin (31) from shaft (32) . 23. Repeat Steps 21 and 22 for the remaining gear assemblies. Illustration 17 g01192382 24. Use Tooling (C) and a suitable lifting device to remove ring gear (38) from housing (39). The weight of ring gear (38) is approximately 125 kg (275 lb). https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP52... 9/12 Illustration 18 g00865939 25. Remove O-ring seal (40) from the main housing. Illustration 19 g00865955 26. Place suitable cribbing under the final drive in order to support the motor housing. Illustration 20 g00866047 https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP... 10/12 Illustration 21 g00865969 Dimension (X) is equal to 14.0 mm (0.55 inch). 27. Use Tooling (D) to remove bolts (41) from gear (42) . Illustration 22 g00866066 28. Install Tooling (E) in the gear, as shown. Tighten Tooling (E) evenly in order to loosen the gear. Remove the gear from the motor housing. Illustration 23 g00866072 29. Remove shims (43) from the motor housing. https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP... 11/12 Illustration 24 g00866085 30. Attach Tooling (C) and a suitable lifting device to main housing (45). The weight of main housing (45) is approximately 191 kg (420 lb). 31. Remove bolts (44) . 32. Use the suitable lifting device to separate main housing (45) from motor housing (39) . Note: Motor housing (39) will rest on the suitable cribbing. Illustration 25 g00866095 33. Remove bearing cone (46) from the main housing. https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

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374D L Excavator PAX00001-UP (MACHINE) POWERED BY C15 Engine(SEBP... 12/12 Illustration 26 g00866100 34. Remove Duo-Cone seal (47), and bearing cups (48) and (49) from the main housing. Illustration 27 g00866156 35. Remove pins (50), if necessary. 36. Remove bearing cone (51) . 37. Remove Duo-Cone seal (52) from the motor housing. Copyright 1993 - 2020 Caterpillar Inc. Wed Nov 4 00:57:56 UTC+0800 2020 All Rights Reserved. Private Network For SIS Licensees. https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... 2020/11/4

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