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2. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 345C EXCAVATOR PJW
Configuration: 345C L Hydraulic Excavator PJW00001-UP (MACHINE) POWERED BY C13 Engine
Disassembly and Assembly
345C Excavator and 345C MHPU
Mobile Hydraulic Power Unit Machine Systems
Media Number -RENR8612-06 Publication Date -01/02/2013 Date Updated -21/02/2013
i05970668
Final Drive - Assemble
SMCS - 4050-016
Assembly 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-1860 Retaining Ring Pliers 1
D 4C-8359 Eyebolt 3
E 4C-8359 Eyebolt 2
F 138-7574 Link Bracket 2
G 8T-0531 Duo-Cone Seal Installer As 1
H 4C-5599 Anti-Seize Compound 1
J 9S-3263 Thread Lock Compound 1
K 1U-8846 Gasket Sealant 1
L 6V-7059 Micrometer 1
M 1U-9895 Crossblock 1
1. Make sure that all parts of the final drive are thoroughly clean and free of dirt and debris
prior to assembly. Check the condition of all O-ring seals that are used in the final drive. If
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3. any of the seals are damaged, use new parts for replacement. Reassemble the final drive on
Tooling (A) .
Illustration 1 g01208879
2. Apply Tooling (H) to the surfaces inside sprocket housing (35) that makes contact with the
bearing cups. Install a bearing cup that is in each side of the sprocket housing with a press.
Make sure that the bearing cups are properly seated.
3. Apply Tooling (H) to the surfaces inside the motor housing that makes contact with bearing
cones (42) .
4. Install inner bearing cone (42) on the motor housing.
Illustration 2 g01208625
5. Apply Tooling (F) and a suitable lifting device to sprocket housing (35) , as shown. The
weight of sprocket housing (35) is approximately 127 kg (280 lb). Install sprocket housing
(35) on the motor housing. Carefully install outer bearing cone (42) on the sprocket housing.
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4. Illustration 3 g01208578
6. Adjust the bearing preload of the final drive. Determine the correct number of shims (40)
that are required for the proper bearing preload, as follows:
Illustration 4 g01208987
a. Use a depth micrometer in order to measure the step height of coupling gear (38) at
several locations around the gear. Find the average for the measured dimensions
around the gear and record the dimension. Call this Dimension (X) .
b. Apply a load of 10000 kg (22000 lb)to bearing cones (42) .
c. Rotate sprocket housing (35) several times in order to seat the bearing cones.
d. Reduce the load to 3500 ± 350 kg (7700 ± 770 lb).
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5. Illustration 5 g00631001
Illustration 6 g03742848
e. While the load is still on the bearing cones, measure the distance between the top face
of the motor housing and the top face of bearing cone (42) . Take measurements in
several locations around the motor housing. Find the average of the measured
dimensions, and record the dimensions. Call this Dimension (Y) .
f. Determine the correct thickness of shims (40) which are used between bearing cone
(42) and coupling gear (38) . Use the following equation in order to determine the
shim pack thickness.
Shim pack thickness ... (X) − (Y) ± 0.05 mm (0.002 inch)
Note: If shims (40) are required, install the thinnest shim next to coupling gear (38)
during final assembly.
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6. Illustration 7 g01208625
7. Apply Tooling (F) and a suitable lifting device to sprocket housing (35) , as shown.
Separate sprocket housing (35) from the motor housing.
ReferenceRefer to Disassembly and Assembly, "Duo-Cone Conventional Seals - Install".
Note: The rubber seals and all surfaces that makes contact with 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.
Illustration 8 g00631006
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7. Illustration 9 g01208999
8. Install Duo-Cone seal kit (43) in the sprocket housing with Tooling (G) .
Illustration 10 g00631014
Illustration 11 g01208626
Illustration 12 g01208625
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8. 9. Install Duo-Cone seal kit (41) in the motor housing with Tooling (G) .
10. ApplyTooling (H) in the bores for the locating pins that are in the motor housing. Reinstall
the locating pins in the motor housing.
11. Make sure that inner bearing cone (42) is seated properly on the motor housing.
Note: Do not scratch Duo-Cone seal gp (41) or damage the Duo-Cone seal gp in the main
housing, or the motor housing during 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 between the components is caused by the Duo-Cone seal kit. This will be
eliminated during the installation of the coupling gear.
12. Attach Tooling (F) and a suitable lifting device to sprocket housing (35) , as shown.
Carefully install the sprocket housing on the motor housing.
13. Install outer bearing cone (42) on the sprocket housing. Make sure that the outer bearing
cone is properly seated.
Illustration 13 g01208578
14. Install shims (40) that were determined in Steps 6.a through 6.f on the end of the sprocket
housing, as shown. If shims were required, make sure that the thinnest shim is installed on
top.
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9. Illustration 14 g01208553
15. Put coupling gear (38) in the original position on the motor housing.
16. Apply Tooling (J) on the threads of bolts (37) that hold coupling gear (38) in position.
Tighten bolts (37) evenly and tighten the bolts in diagonally opposite pairs.
Illustration 15 g01208542
17. Install O-ring seal (36) in sprocket housing (35) .
Illustration 16 g01208300
18. Thoroughly clean the mating surface of sprocket housing (35) that will make contact with
ring gear (34) .
19. Apply a bead of Tooling (K) on the mating surface of ring gear (34) .
20. Attach Tooling (E) and a suitable lifting device to ring gear (34) . Put ring gear (34) in
position on the sprocket housing. The weight of ring gear (34) is approximately 82 kg (180
lb). Make sure that the alignment mark up on the sprocket housing and the ring gear line
with each other.
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10. Illustration 17 g01208280
Illustration 18 g01208265
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11. Illustration 19 g00513451
21. Assemble carrier assembly (28) , as follows:
Note: If planetary gear (32) is stamped with an "N", make sure that the planetary gear
identification grooves are facing in the correct direction, which was noted during the
disassembly of the carrier assembly (28) .
a. Assemble carrier assembly (28) .
b. Put clean SAE 30 oil on bearings (33) .
c. Install bearings (33) in planetary gear (32) .
d. Install a thrust washer (31) on each side of the planetary gear.
e. Install the planetary gear and thrust washers in carrier (28) .
f. Install planetary shaft (30) in carrier (28) and through planetary gear (32) . Make sure
that the spring pin hole in the planetary shaft is in alignment with the spring pin hole
in the carrier.
g. Install spring pin (29) in the carrier and into the planetary shaft. Install the spring pin
until the spring pin is even with the outside surface of the carrier. Orient the split in
the spring pin horizontally to the carrier. Align the split in the spring pin to the left or
to the right. Refer to Illustration 19.
h. Make a stake mark on each side of the spring pin hole in the carrier. This will prevent
the spring pin from falling out of the spring pin hole. Each stake mark should be
approximately 1.5 to 3.00 mm (.59 to .118 inch) from the spring pin hole.
i. Repeat Steps 21.a through 21.h in order to install the remaining three planetary gears
in carrier (30) .
Illustration 20 g01208256
22. Attach Tooling (E) and a suitable lifting device to carrier assembly (28) . The weight of
carrier assembly (28) is approximately 64 kg (140 lb). Put carrier assembly (28) in position
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12. in the ring gear. It will be necessary to rotate carrier assembly (28) back and forth during
installation in order to engage all the gears properly.
Illustration 21 g01208253
23. Install spacer (20) on carrier assembly (28) .
24. Assemble carrier assembly (19) , as follows:
Illustration 22 g01208245
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13. Illustration 23 g01208189
Illustration 24 g01208169
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14. Illustration 25 g00513451
Note: If planetary gear (24) is stamped with an "M", make sure that the planetary
gear's identification grooves are facing in the correct direction, which was noted
during the disassembly of carrier assembly (19) .
a. Install sun gear (27) in carrier assembly (19) . Refer to Illustration 22.
b. Use a screwdriver to install retaining ring (26) that holds sun gear (27) in the carrier.
c. Put clean SAE 30 oil on bearing (25) . Install bearing (25) in planetary gear (24) .
d. Install a thrust washer (23) on each side of the planetary gear.
e. Install the thrust washers and the planetary gear in carrier (19) .
f. Install planetary shaft (22) in carrier (19) and through planetary gear (24) . Make sure
that the spring pin hole in the carrier is in alignment with the spring pin hole in the
planetary shaft.
g. Install spring pin (21) in the carrier and into the planetary shaft. Install the spring pin
until the spring pin is even with the outside surface of the carrier. Orient the split in
the spring pin horizontally to the carrier. Align the split in the spring pin to the left or
to the right. Refer to Illustration 25.
h. Make a stake mark on each side of the spring pin hole in the carrier.Staking will
prevent the spring pin from falling out of the spring pin hole. Each stake mark should
be approximately 1.5 to 3.00 mm (.59 to .118 inch) from the spring pin hole.
i. Repeat Steps 24.a through 24.h in order to install the other two planetary gears in
carrier (19) .
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15. Illustration 26 g01208136
25. Attach Tooling (D) and a suitable lifting device to carrier assembly (19) . The weight of
carrier (19) is approximately 45 kg (100 lb). Put the carrier assembly in position in ring gear
(34) . It may be necessary to rotate the carrier assembly back and forth during installation in
order to engage the gears properly.
26. Assemble carrier assembly (11) , as follows:
Illustration 27 g01208035
Illustration 28 g01207897
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16. Illustration 29 g01207865
Illustration 30 g01209086
Note: If planetary gear (13) is stamped with an "L", make sure that the planetary gear
identification marks are facing in the direction, which was noted during the
disassembly of carrier (11) .
a. Install sun gear (18) in carrier (11) . Refer to Illustration 27.
b. Use a screwdriver in order to install retaining ring (17) that holds the sun gear (18) in
carrier (11) .
c. Put clean SAE 30 oil on bearing (16) , and install bearing (16) in planetary gear (15) .
d. Install a thrust washer (14) on each side of the planetary gear.
e. Install the planetary gear and thrust washers on the shaft of carrier (11) .
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17. f. Use Tooling (C) in order to install retaining ring (13) that holds the planetary gear in
position. Make sure that the retaining ring is installed correctly. Refer to Illustration
30.
g. Repeat Steps 26.a through 26.f in order to install the remaining two planetary gears on
carrier assembly (11) .
Illustration 31 g01209158
27. Install a spacer (12) on each side of sun gear (18) in carrier (11) .
28. Install carrier (11) in carrier assembly (19) .
Illustration 32 g01209163
29. Install sun gear (10) in carrier (11) .
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18. Illustration 33 g00631068
30. Use a 25.4 mm (1.00 inch) thick straight edge and a depth micrometer in order to measure
Dimension (P) . Dimension (P) is between the upper surface of sun gear (10) and the
machined surface of ring gear (34) . Call this Dimension (P) .
Illustration 34 g00631074
31. Use a 25.4 mm (1.00 inch) thick straight edge and a depth micrometer in order to measure
Dimension (Q) . Dimension (Q) is from the machined surface of cover (5) to the bottom of
the insertion hole for shim (7) . Call this Dimension (Q) .
32. Use Tooling (L) to measure the thickness of spacer (6) . Record this measurement as
Dimension (R) .
33. Determine the correct thickness of shims (7) . Shims (7) control the amount of end play of
sun gear (10) . The clearance should be between 1.00 to 2.60 mm (0.04 inch to 0.102 inch).
Use the following equation in order to determine the amount of required shims.
Shim pack thickness ... (Q) − (P) − (R)
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19. Illustration 35 g01207845
34. Put ring gear (9) in position in cover (5) . Make sure that all of the mounting bolt holes in
both components are in alignment with each other. Apply Tooling (J) on the threads of
socket head bolts (8) that hold ring gear (9) in place. Install the bolts, and tighten the bolts
evenly.
35. Install the correct thickness of shims (7) that were determined in Steps 30 through 33 into
cover (5) .
Illustration 36 g01207835
36. Install spacer (6) in cover (5) . It may be necessary to use a soft faced hammer to seat the
spacer.
37. Make sure that the machined surface of ring gear (34) is thoroughly clean and dry and that
the machined surface is free of dirt and debris.
38. ApplyTooling (K) around the machined surface of the ring gear.
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20. Illustration 37 g01207801
39. Attach Tooling (B) and a suitable lifting device to cover (5) . The weight of cover (5) is
approximately 52 kg (115 lb). Put the cover in the original position on the ring gear. It will
be necessary to rotate the cover back and forth in order to engage the planetary gears of
carrier assembly (11) with the ring gear in the cover (5) .
40. Remove the suitable lifting device and Tooling (B) from the cover.
Illustration 38 g01207796
41. Apply Tooling (J) on the threads of socket head screws (3) .
42. Reinstall socket head screws (3) in cover (5) .
43. Apply Tooling (J) on the threads of bolts (4) that hold cover (5) in position. Install the
washers and bolts (4) . Tighten the bolts evenly.
44. Attach a suitable lifting device to the final drive, and invert the final drive over 180 degrees.
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21. Illustration 39 g01207795
45. Install spacer (1) to final drive (2) .
End By: Install the final drive and the travel motor. Refer to Disassembly and Assembly, "Final
Drive and Travel Motor - Install".
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
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22. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 345C EXCAVATOR PJW
Configuration: 345C L Hydraulic Excavator PJW00001-UP (MACHINE) POWERED BY C13 Engine
Disassembly and Assembly
345C Excavator and 345C MHPU
Mobile Hydraulic Power Unit Machine Systems
Media Number -RENR8612-06 Publication Date -01/02/2013 Date Updated -21/02/2013
i07186056
Final Drive and Travel Motor - Install
SMCS - 4050-012; 4351-012
Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A - Block 1
B
1U-6221 Hydraulic Torque Wrench Assembly 1
132-8154 3/4 inch Square Drive Link 1
132-8223 Power Pack 1
C 439–3940 Bracket As 2
D - Loctite 243 -
Note: The procedure to install the right hand final drive and the procedure to install the left hand
final drive is identical. The procedure that follows is for one of the final drives.
Note: The mounting surface for the final drive and the track roller frame must be clean prior to
assembly.
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23. Illustration 1 g01214021
1. Attach a suitable lifting device to the final drive (2), as shown. The combined weight of the
final drive and the travel motor is 725 kg (1600 lb). It may be necessary to adjust the lifting
slings for correct balance of the final drive. Position the final drive and the travel motor on
the track roller frame, as shown.
Illustration 2 g01214023
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24. Illustration 3 g01214049
2. Before assembly, remove compound, oil, and dust from female threads, then apply Tooling
(D) to the threads of bolts (5).
3. Use Tooling (B) to tighten bolts (5) in an alternating sequence to a torque of 250 ± 25 N·m
(184 ± 18 lb ft). Turn an additional angle of 45 ± 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.
4. Install fittings (4) and hose assemblies (3).
5. Fill the final drive. Refer to Operation and Maintenance Manual, "Final Drive - Change".
6. Connect the track. Refer to Disassembly and Assembly, "Track - Connect".
7. Install the counterbalance valve. Refer to Disassembly and Assembly, "Counterbalance
valve - Change".
Illustration 4 g01214117
NOTICE
To avoid system damage, make sure that the hydraulic motor is
properly filled with hydraulic oil before start-up.
8. Start the machine and reposition in order to remove Tooling (A).
9. Adjust the track tension. Refer to Operation and Maintenance Manual, "Track Adjustment -
Adjust".
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25. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 345C EXCAVATOR PJW
Configuration: 345C L Hydraulic Excavator PJW00001-UP (MACHINE) POWERED BY C13 Engine
Disassembly and Assembly
345C Excavator and 345C MHPU
Mobile Hydraulic Power Unit Machine Systems
Media Number -RENR8612-06 Publication Date -01/02/2013 Date Updated -21/02/2013
i02430596
Swivel - Remove
SMCS - 5060-011
Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A FT-2674 Vacuum Cap 1
B 1U-7505 Hydraulic Jack 1
C 138-7575 Link Bracket 2
Start By:
A. Release the hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic
System Pressure - Release".
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
before opening any compartment or disassembling any component
containing fluids.
Refer to Special Publication, NENG2500, "Caterpillar Dealer Service
Tool Catalog" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.
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26. Suggest:
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Please download this document
first, and then click the above link
to download the complete manual.
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27. Dispose of all fluids according to local regulations and mandates.
Note: Cleanliness is an important factor. Before the removal procedure, the exterior of the
component should be thoroughly cleaned. This will help to prevent dirt from entering the internal
mechanism.
Note: Put identification marks on all lines, on all hoses, on all wires, and on all tubes for
installation purposes. Plug all lines, hoses, and tubes. This helps to prevent fluid loss and this
helps to keep contaminants from entering the system.
1. Install Tooling (A) onto the hydraulic tank. Attach an air supply hose onto Tooling (A).
Apply 276 to 414 kPa (40 to 60 psi) of air. This procedure will pull vacuum on the
hydraulic system.
Illustration 1 g01216634
2. Position Tooling (B) under guards (1). Remove bolts (2). Remove guards (1). The weight of
each of guards (1) are approximately 25 kg (55 lb).
Note: The weight of guards (1) can increase due to debris on the top of guards (1) .
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