This document provides disassembly instructions for the final drive of an excavator model 324D L and 324D LN. The 31 step procedure includes removing the final drive housing, cover, gears, carriers, shafts, seals and other components. Special tools are listed that are required, and safety notes about cleanliness and part markings for reassembly are provided. Detailed illustrations accompany each step to show how to disassemble the various parts of the final drive.
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2. Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-2420 Transmission Repair Stand 1
B 138-7573 Link Bracket 2
C 1P-1863 Retaining Ring Pliers 1
D 194-3878 Spanner Socket 1
E 138-7574 Link Bracket 2
F
5F-7366 Forcing Screw 1
1P-5546 Crossblock 1
1U-9889 Crossblock 1
1P-0520 Driver Group 1
6V-7888 Puller Leg 2
1H-3112 Puller Assembly 1
1P-5551 Adjustable Screw Assembly 1
G
1U-7600 Slide Hammer Puller Gp 1
8T-0266 Bolt 1
Start By:
a. Remove the final drive. Refer to Disassembly and Assembly, "Final Drive - Remove".
Note: Cleanliness is an important factor. Before the disassembly procedure, the exterior of
the component should be thoroughly cleaned. This will prevent dirt from entering the
internal mechanism.
Note: Some of the images that are in this procedure do not show the sprocket assembly that
is attached to the final drive housing. If necessary, the weights that are given include the
weight of the sprocket assembly.
1. Put an alignment mark across the sections of the final drive for assembly purposes. The
parts must be reinstalled in the part's original locations.
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3. Illustration 1 g00708089
2. Fasten the final drive to Tooling (A), as shown. The weight of the final drive assembly is
approximately 312 kg (688 lb).
3. Remove bolts (1) and the washers that hold the cover in position.
Illustration 2 g00708090
4. Remove the setscrews from the cover. Fasten Tooling (B) and a suitable lifting device to
cover (2), as shown. Remove the cover. The weight of the cover is approximately 32 kg
(70 lb).
Illustration 3 g00879362
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4. 5. Remove bolts (3). Remove gear (5). Check plate (6). Replace plate (6) if wear is shown.
Remove plugs (4) from cover (2).
Illustration 4 g00879365
6. Remove O-ring seal (7) from plugs (4).
Illustration 5 g00780428
7. Remove gear (8). Remove spacer (9).
Illustration 6 g00780432
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5. 8. Remove retaining ring (10) with Tooling (C). Remove washer (11). Remove gear (12).
Remove bearing assembly (13). Remove second washer (11).
9. Repeat Step 8 for the remaining two gear assemblies.
Illustration 7 g00781401
10. Remove retaining ring (14).
Illustration 8 g00781407
11. Remove carrier assembly (15).
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6. Illustration 9 g01389593
12. Use a suitable press in order to remove the shafts from carrier assembly (15).
Illustration 10 g00781412
13. Remove gear (16). Remove spacer (17).
Illustration 11 g00781466
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7. 14. Remove retaining ring (18).
15. Remove carrier assembly (19).
Illustration 12 g00879368
16. Disassemble carrier assembly (19), as follows.
a. Drive spring pin (20) into planetary shaft (21) with a hammer and a punch.
Illustration 13 g00781476
b. Remove planetary shaft (21).
c. Remove spring pin (20) from planetary shaft (21) with a hammer and a punch.
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8. Illustration 14 g00781516
d. Remove thrust washers (22) and planetary gear (24) from the carrier assembly.
e. Remove bearing (23) from planetary gear (24).
17. Repeat Steps 16.a through 16.e for the other two planetary.
Illustration 15 g00781529
18. Remove gear (25). Remove spacer (26).
Illustration 16 g00781559
19. Remove carrier assembly (27).
20. Use two people to remove carrier assembly (27). The weight of the carrier assembly is
approximately 38 kg (85 lb).
21. Disassemble carrier assembly (27), as follows.
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9. Illustration 17 g00781719
a. Drive spring pin (29) into planetary shaft (28) with a hammer and a punch.
Illustration 18 g00781601
b. Remove planetary shaft (28).
c. Remove spring pin (29) from planetary shaft (28) with a hammer and a punch.
Illustration 19 g00781607
d. Remove thrust washers (30) and planetary gear (32) from the carrier assembly.
e. Remove two bearings (31) from the planetary gear.
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10. 22. Repeat Steps 21.a through 21.e for the other two planetary gears.
Illustration 20 g00781730
23. Use two people to remove gear (33). The weight of gear is approximately 41 kg (90 lb).
Illustration 21 g00781807
24. Remove O-ring seal (34).
Illustration 22 g01147650
25. Remove bolts (35A) and plates (35B).
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11. Illustration 23 g01147651
26. Use Tooling (G) to remove dowel (37) from stopper plate (35).
Illustration 24 g01147759
27. Secure Tooling (D) to stopper plate (35). Use Tooling (D) to remove stopper plate (35).
Illustration 25 g01147930
28. Use Tooling (E) and a suitable lifting device to remove housing (36). The weight of housing
(36) is approximately 100 kg (220 lb).
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12. Illustration 26 g01147951
29. Remove Duo-Cone seal (39A) from housing (38).
Illustration 27 g01147975
Illustration 28 g01147934
30. Remove Duo-Cone seal (39B) from housing (36).
31. Use Tooling (F) in order to remove bearings (40) and (41) from housing (36).
32. If necessary, remove the final drive sprocket from the sprocket housing. Refer to
Disassembly and Assembly, "Final Drive Sprocket - Remove and Install".
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13. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 324D L EXCAVATOR SYM
Configuration: 324D L & LN Excavator SYM00001-UP (MACHINE) POWERED BY C-7 Engine
Disassembly and Assembly
324D, 325D, 326D and 329D Excavators and 329D MHPU Mobile Hydraulic Power
Unit Machine Systems
Media Number -RENR8646-22 Publication Date -01/02/2015 Date Updated -12/09/2018
i03508206
Final Drive - Disassemble
SMCS - 4050-015
S/N - A3R1022-UP
S/N - BFC1-UP
S/N - BYS1-UP
S/N - CYW1-UP
S/N - CZF1-UP
S/N - DBH380-UP
S/N - DJF1-UP
S/N - DTZ1-UP
S/N - EBM1-UP
S/N - EJC644-UP
S/N - GPB802-UP
S/N - J8D1-UP
S/N - J9D1-UP
S/N - JAT1-UP
S/N - JHJ1-UP
S/N - JJG814-UP
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15. Tool Part Number Part Description Qty
A 1P-2420 Transmission Repair Stand 1
B 138-7573 Link Bracket 2
C 1P-1863 Retaining Ring Pliers 1
D 138-7575 Link Bracket 3
E 4C-8359 Eyebolt 2
F 138-7574 Link Bracket 2
G 138-7576 Link Bracket 2
Start By:
a. Start by removing the final drive. Refer to Disassembly and Assembly, "Final Drive -
Remove".
Note: Cleanliness is an important factor. Before the disassembly procedure, the exterior of
the component should be thoroughly cleaned. This will prevent dirt from entering the
internal mechanism.
1. Put an alignment mark across the sections of the final drive for assembly purposes. The
parts must be reinstalled to the original locations.
Illustration 1 g00892878
2. Use Tooling (G) and a suitable lifting device to position the final drive assembly onto
Tooling (A). The weight of the final drive assembly is approximately 550 kg (1200 lb).
3. Remove bolts (1).
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16. Illustration 2 g00892883
4. Use Tooling (B) and a suitable lifting device to remove cover (2). The weight of cover (2) is
approximately 32 kg (70 lb).
Illustration 3 g00892888
5. Remove bolts (3) and gear (4). Check plate (6). Replace plate (6) if plate (6) is worn.
Remove plugs (5) from cover (2).
Illustration 4 g00892906
6. Remove O-ring seals (7) from plugs (5).
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17. Illustration 5 g00892930
7. Remove gear (8) and spacer (9).
Illustration 6 g00892965
8. Use Tooling (C) to remove retaining ring (10). Remove washer (11) and gear (12). Remove
bearing assembly (13) and washer (14).
9. Repeat Step 8 for the other two gear assemblies.
Illustration 7 g00892968
10. Remove retaining ring (15).
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18. Illustration 8 g00892975
11. Remove carrier assembly (16).
Illustration 9 g01389804
12. Use a suitable press to remove the shafts from carrier assembly (16).
Illustration 10 g00892977
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19. 13. Remove gear (17) and spacer (18).
Illustration 11 g00892997
14. Use Tooling (D) and a suitable lifting device to remove planetary carrier (19). The weight of
planetary carrier (19) is approximately 48 kg (105 lb).
Illustration 12 g00893019
15. Remove retaining ring (21). Lift planetary carrier (19) off sun gear (20).
Illustration 13 g00896860
16. Drive spring pin (23) into planetary shaft (22).
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20. Illustration 14 g00893043
17. Remove planetary shaft (22). Use a suitable punch to remove spring pin (23) from planetary
shaft (22).
Illustration 15 g00896863
18. Remove washers (24) and bearing (25) from planetary gear (26).
19. Repeat Steps 16 through 18 for the other two planetary gears.
Illustration 16 g01842853
20. Remove gear (27). Remove spacer (27A).
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21. Illustration 17 g01842974
21. Use two people to remove carrier assembly (28). The weight of carrier assembly (28) is
approximately 38 kg (85 lb).
Illustration 18 g01843140
22. Drive spring pin (30) into shaft (29).
Illustration 19 g00893658
23. Remove shaft (29). Use a suitable punch to remove spring pin (30) from shaft (29).
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22. Illustration 20 g00893674
24. Remove washers (31) and bearings (32) from planetary gear (33).
25. Repeat Steps 22 through 24 for the other three planetary gears.
Illustration 21 g01208300
26. Fasten Tooling (E) and a suitable lifting device to ring gear (34), as shown. Remove ring
gear (34) from sprocket housing (35). The weight of ring gear (34) is approximately 66 kg
(146 lb).
Illustration 22 g01208542
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24. 27. Remove O-ring seal (36) from sprocket housing (35).
Illustration 23 g01208553
28. Remove bolts (37) from coupling gear (38).
Illustration 24 g01208572
29. Install suitable forcing bolts (39) in coupling gear (38). Tighten the forcing bolts evenly in
order to loosen coupling gear (38). Remove the coupling gear from the motor housing.
Illustration 25 g01208578
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25. Illustration 26 g01208625
30. Remove shims (40) from the motor housing.
Note: Inner cones and outer bearing cones (42) are a slip fit on the motor housing. While
you remove sprocket housing (35) from the motor housing, inner bearing cone (42) may
stay with the sprocket housing or the inner bearing cone may stay on the motor housing.
31. Fasten Tooling (F) and a suitable lifting device to sprocket housing (35). Separate the
sprocket housing from the motor housing. The weight of sprocket housing (35) is
approximately 109 kg (240 lb).
Illustration 27 g01208626
32. Remove the locating pins from the motor housing.
33. Remove Duo-Cone seal (41) from the motor housing.
34. If inner bearing cone (42) remained on the motor housing, then remove the inner bearing
cone.
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26. Illustration 28 g01208633
35. Remove Duo-Cone seal (43) from the sprocket housing.
36. If inner bearing cone (42) remained on the sprocket housing, then remove the inner bearing
cone.
37. Remove the bearing cups from the sprocket housing.
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