Caterpillar cat 323 e l excavator (prefix rap) service repair manual (rap00001 and up)

Service Repair Manual
Models
323E L, 323E LN, 323E SA
Excavator

1. Install final drive (4) in the reverse order of removal.
a. Before assembly, remove compound, oil, and dust from female threads, then apply
Tooling (B) to the threads of bolts (6).
b. Tighten bolts (6) in an alternating sequence to a torque of 150 ± 25 N·m (111 ± 18 lb ft).
Turn an additional angle of 55 ± 5 degrees. Refer to Service Magazine , M0083843 , "An
Improved Bolt Tightening Procedure for the Critical Joints Is Now Used on all
Excavators" for more detailed information.
c. Tighten bolts (3) to a torque of 80 ± 8 N·m (59 ± 6 lb ft).
Disassembly Procedure
Table 3
Required Tools
Tool Part Number Part Description Qty
A 1P-2420 Transmission Repair Stand 1
B 439-3938 Link Bracket 2
C 154-6181 Forcing Bolt 1
D 439-3939 Link Bracket As 2
E
5F-7366 Forcing Bolt 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
F 1U-8846 Gasket Sealant 1
Start By:
a. Remove the final drive.
1. Put an alignment mark across the sections of the final drive for assembly purposes. The parts
must be reinstalled in the original locations.
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Illustration 6 g00708089
2. Fasten the final drive to Tooling (A), as shown. The combined weight of the final drive and
final drive sprocket is approximately 312 kg (688 lb).
3. Remove bolts (1) and the washers that hold the cover in position.
4. Remove the setscrews from the cover. Fasten Tooling (B) and a suitable lifting device to cover
(2), as shown. The weight of cover (2) is approximately 32 kg (70 lb). Remove cover (2).
5. Remove thrust plate (3) from cover (2).
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6. Remove plugs (4) from cover (2).
7. Remove O-ring seals (5) from both plugs (4) that were in the cover.
8. Remove spacer (6) from carrier assembly (7).
9. Remove sun gear (8) from carrier assembly (7).
10. Remove carrier assembly (7) by lifting the carrier assembly straight up. The weight of carrier
assembly (7) is approximately 14 kg (30 lb).
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11. Disassemble carrier assembly (7), as follows.
a. Drive spring pin (10) into planetary shaft (9) with a hammer and a punch.
b. Remove planetary shaft (9) with spring pin (10) from the carrier assembly.
c. Remove spring pin (10) from planetary shaft (9) with a hammer and a punch.
d. Remove thrust washers (11) and planetary gear (13) from the carrier assembly.
e. Remove bearing (12) from planetary gear (13).
12. Repeat Steps 11.a through 11.e to remove the remaining planetary gears from the carrier
assembly.
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13. Remove sun gear (14) from carrier assembly (15).
14. Remove spacer (16).
Note: It will be necessary to pry ring gears (17) away from main housing (18) to install the
lifting slings.
15. Fasten a suitable lifting device to ring gears (17), as shown. Remove the ring gears from main
housing (18). The weight of ring gears (17) is approximately 45 kg (100 lb).
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16. Use a screwdriver or a chisel to separate the two ring gears (17).
Note: The two ring gears are held together with Tooling (F). It may be necessary to heat the
ring gears to soften the sealant. Do not heat over 135 °C (275 °F) for more than thirty minutes.
17. Position a 12.7 mm (0.50 inch) shackle under carrier assembly (15).
18. Fasten a suitable lifting device to the shackle.
19. Slowly lift carrier assembly (15) from the final drive. The weight of carrier assembly (15) is
approximately 39 kg (85 lb).
20. Disassemble carrier assembly (15), as follows.
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a. Drive spring pin (20) into planetary shaft (19) with a hammer and a punch.
b. Remove planetary shaft (19) with spring pin (20) from the carrier assembly.
c. Remove spring pin (20) from planetary shaft (19) with a hammer and a punch.
d. Remove thrust washers (21) and planetary gear (23) from the carrier assembly.
e. Remove bearings (22) from planetary gear (23).
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21. Repeat Steps 20.a through 20.e to remove the remaining planetary gears from the carrier.
22. Remove O-ring seal (24) from main housing (18).
23. Remove bolts (25) from gear (26).
24. Use Tooling (C) to remove gear (26) from main housing (18).
Note: The motor housing will separate from the main housing (18) once gear (26) is removed.
Make sure that the motor housing is supported.
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25. Remove shims (27) from the main housing.
26. Fasten Tooling (D) and a suitable lifting device to main housing (18), as shown.
27. Use a hammer and a punch to separate main housing (18) and the final drive sprocket from the
motor housing (28). The combined weight of main housing (18) and the final drive sprocket is
28. Remove Duo-Cone seal (29) from motor housing (28).
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29. Remove alignment pins (30).
30. Remove Duo-Cone seal (31) from main housing (18).
31. Use Tooling (E) to remove bearings (32) and (33) from the main housing.
32. If necessary, remove the final drive sprocket from the main housing.
33. Refer to Disassembly and Assembly, "Final Drive Sprocket - Remove and Install".
Assembly Procedure
Table 4
Required Tools
Tool Part Number Part Description Qty
A 1P-2420 Transmission Repair Stand 1
B 439-3938 Link Bracket 2
D 439-3939 Link Bracket As 2
G 126-3994 Duo-Cone Seal Installer 1
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H 5P-3931 Anti-Seize Compound
F 1U-8846 Gasket Sealant
Note: Apply a light film of hydraulic oil to all components before assembly.
1. Install the final drive sprocket if the sprocket was removed from the main housing.
2. Remove the final drive sprocket.
3. Apply Tooling (H) to the outer diameter of the bearings.
4. Install bearings (32) and (33) in main housing (18) with a suitable press.
5. Make sure that bearing (32) and bearing (33) contact the counterbore in the main housing.
6. Use the following procedure to preload the bearings and determine the correct thickness of
shims.
a. Fasten Tooling (D) and a suitable lifting device to main housing (18). Install the main
housing on the motor housing.
b. Put the main housing and the motor housing in a suitable press.
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(a) Bearing surface
(b) Housing surface
c. Use a suitable press and a spacer to apply a load of 4000 kg (8819 lb) on the bearings.
Rotate the housing to seat the bearings.
d. Reduce the load on the bearings to 1000 ± 100 kg (2205 ± 221 lb).
e. Use a depth micrometer to measure the step length between the bearing surface and the
housing surface. Take measurements at several different locations around the housing.
Compute the average of the measured dimensions and record the number. Call this
Dimension (Y).
f. Use a depth micrometer to measure the step length of the coupling gear (26). Take
measurements at several different locations around the gear. Compute the average of the
measured dimensions and record the number. Call this Dimension (X).
g. The thickness of the shims is equal to (X − Y) ± 0.05 mm (0.002 inch).
Note: Use no more than two shims. If two shims are required, install the thinner shim
next to the gear.
h. Remove the main housing from the motor housing.
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7. Use Tooling (G) to install Duo-Cone seal (31) in main housing (18). Refer to Disassembly and
Assembly, "Duo-Cone Conventional Seals - Install".
Note: The rubber seals and all surfaces that contact the seals must be clean and dry. After
installation of the seals, put clean SAE 30 oil on the contact surfaces of the metal seals.
8. Use Tooling (G) to install Duo-Cone seal (29) in motor housing (28).
9. Apply Tooling (H) to the surfaces that contact pins (30).
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10. Install alignment pins (30).
Note: Do not damage the Duo-Cone seals in the main housing or in the motor housing during
the assembly of the two components. After installation of the main housing on the motor
housing, there will be a small gap between the components. The gap is caused by the Duo-
Cone seals. This gap will be eliminated during installation of gear (26).
11. Fasten Tooling (D) and a suitable lifting device to main housing (18). Install the main housing
on the motor housing.
12. Install shims (27) that were determined in Step 6.g in the main housing.
Note: If two shims are required, install the thinner shim next to the gear.
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13. Install gear (26).
14. Install bolts (25) in gear (26). Install the bolts in an even pattern until the gear is seated against
the bearing. Tighten bolts (25) in a crisscross pattern.
15. Install O-ring seal (24) to main housing (18).
16. Assemble carrier assembly (15), as follows.
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a. Install bearings (22) in planetary gear (23).
b. Install thrust washers (21) and planetary gear (23) in the carrier assembly.
c. Use a deburring tool to remove the metal burr from the openings in the carrier. Install
planetary shaft (19) in the carrier assembly.
d. Drive spring pin (20) into planetary shaft (19) with a hammer and a punch.
e. Orient the split in spring pin (20) vertically to the carrier. Align the split in the spring pin
to the top or to the bottom. Make a stake mark on each side of the spring pin hole in the
carrier. Each stake mark should be approximately 1.50 mm (0.059 inch) from the outside
diameter of the spring pin hole.
17. Repeat Steps 16.a through 16.e to install the remaining planetary gears in the carrier assembly.
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18. Install a lifting sling through the middle of carrier assembly (15). Fasten a 12.7 mm (0.50 inch)
shackle to the suitable lifting device.
19. Install carrier assembly (15) on the final drive. The weight of carrier assembly (15) is
20. Remove the shackle and the suitable lifting device.
21. Apply Tooling (F) to the mating surface of ring gear (17b).
22. Install ring gear (17a) on ring gear (17b).
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23. Fasten a suitable lifting device to ring gears (17), as shown. Install the ring gears to main
housing (18). The weight of ring gears (17) is approximately 45 kg (100 lb).
24. Install spacer (16) in the carrier assembly.
25. Install sun gear (14) in carrier assembly (15).
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26. Assemble carrier assembly (7), as follows.
a. Install bearing (12) in planetary gear (13).
b. Install thrust washers (11) and planetary gear (13) in the carrier assembly.
c. Install planetary shaft (9) in the carrier assembly.
d. Drive spring pin (10) into planetary shaft (9) with a hammer and a punch.
e. Orient the split in spring pin (10) vertically to the carrier. Align the split in the spring pin
to the top or to the bottom. Make a stake mark on each side of the spring pin hole in the
carrier. Each stake mark should be approximately 1.50 mm (0.059 inch) from the outside
diameter of the spring pin hole.
27. Repeat Steps 26.a through 26.e to install the remaining planetary gears in the carrier assembly.
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28. Install carrier assembly (7) in the ring gear. The weight of carrier assembly (7) is
29. Install sun gear (8) in carrier assembly (7).
30. Install spacer (6) in carrier assembly (7).
31. Install new O-ring seals (5) on plugs (4) that were in the cover.
32. Install plugs (4) in cover (2). Tighten plugs (4) to a torque of 80 ± 10 N·m (59 ± 7 lb ft).
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33. Install thrust plate (3) in cover (2).
34. Apply Tooling (F) to the mating surface of the ring gear.
35. Fasten Tooling (B) and a suitable lifting device to cover (2), as shown. The weight of cover (2)
is approximately 32 kg (70 lb). Install cover (2).
36. Remove Tooling (B). Install the setscrews in cover (2).
37. Install bolts (1) and the washers that hold the cover in position. Tighten bolts (1) in a crisscross
pattern.
38. Remove the final drive from Tooling (A). The combined weight of the final drive and final
drive sprocket is approximately 310 kg (683 lb).
End By:
a. Install the final drive.
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All Rights Reserved.
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Caterpillar cat 323 e l excavator (prefix rap) service repair manual (rap00001 and up)

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