This document provides instructions for assembling and disassembling parts of a 320 GC Excavator model BR4, including the travel motor and final drive. It lists the required tools and parts and includes illustrations of the assembly and disassembly procedures. The travel motor assembly instructions involve positioning the excavator, installing nuts and bolts, and attaching lifting eyes and plugs. The final drive disassembly instructions specify removing the final drive and separating the sprocket after removing the travel motor.

1. Service Repair Manual
Models
320 GC Excavator

2. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 320 GC EXCAVATOR BR4
Configuration: 320 GC Excavator BR400001-UP (MACHINE) POWERED BY C4.4 Engine
Disassembly and Assembly
320GC, 320 and 323 Excavators Machine Systems
Media Number -M0080364-08 Publication Date -01/09/2018 Date Updated -12/09/2018
i07505833
Travel Motor - Assemble
SMCS - 4351-016
Assembly Procedure
Reference: Special Instruction, "Visual Service Procedures - Colors and Symbols" M0066576
Table 1
Required Tools
Tool Part Number Part Description Qty
A
1P-2420 Transmission Repair Stand 1
FT-0957 Positioning Gp 3
B
- M16x2 Threaded Rod 3
8T-1757 Nut 9
9X-8268 Washer 9
C 421-5662 Lifting Eye Assembly 1
D 421-5663 Lifting Eye Assembly 2
1/17(W)
w
2019/12/11
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

3. Illustration 1 g06345358
Illustration 2 g06345368
2/17(W)
w
2019/12/11
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

4. Illustration 3 g06345370
Illustration 4 g06345375
3/17(W)
w
2019/12/11
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

5. Illustration 5 g06345377
Illustration 6 g06345395
4/17(W)
w
2019/12/11
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

6. Illustration 7 g06345399
Illustration 8 g06345414
5/17(W)
w
2019/12/11
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

7. Illustration 9 g06345418
Illustration 10 g06345601
6/17(W)
w
2019/12/11
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

8. Illustration 11 g06345615
Illustration 12 g06345648
7/17(W)
w
2019/12/11
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

9. Illustration 13 g06345657
Illustration 14 g06345663
8/17(W)
w
2019/12/11
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

10. Illustration 15 g06345669
Illustration 16 g06346148
Invert the head group.
9/17(W)
w
2019/12/11
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

11. 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.
Illustration 17 g06345699
Install the nuts of Tooling (B).
10/17(W)
w
2019/12/11
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

12. Illustration 18 g06345702
Repeat for the opposite side.
Illustration 19 g06345713
Repeat for the opposite side.
Illustration 20 g06345718
11/17(W)
w
2019/12/11
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

13. 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.
Illustration 21 g06345732
Repeat for the opposite side.
12/17(W)
w
2019/12/11
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

14. Illustration 22 g06345742
Repeat for the opposite side.
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.
13/17(W)
w
2019/12/11
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

15. Illustration 23 g06345748
Illustration 24 g06345802
14/17(W)
w
2019/12/11
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

16. Illustration 25 g06345807
Illustration 26 g06345811
Install the plug and the O-ring seal. Repeat for the opposite side.
15/17(W)
w
2019/12/11
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

17. Illustration 27 g06345829
Install the plug and the O-ring seal. Repeat for the other side.
Illustration 28 g06345833
Install the plugs and the O-ring seals. Repeat for the other side.
End By:
a. Install the travel motor.
16/17(W)
w
2019/12/11
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

18. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 320 GC EXCAVATOR BR4
Configuration: 320 GC Excavator BR400001-UP (MACHINE) POWERED BY C4.4 Engine
Disassembly and Assembly
320GC, 320 and 323 Excavators Machine Systems
Media Number -M0080364-08 Publication Date -01/09/2018 Date Updated -12/09/2018
i06991648
Final Drive - Remove and Install
SMCS - 4050-010
Removal Procedure
Reference: Special Instruction, "Visual Service Procedures - Colors and Symbols" M0066576
Start By:
a. Separate the sprocket.
b. Remove the travel motor.
Illustration 1 g06191103
1/3(W)
w
2019/12/11
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

19. Illustration 2 g06191104
Note: Mark the orientation of the bolt holes for the travel motor for installation purposes.
Illustration 3 g06191106
Installation Procedure
2/3(W)
w
2019/12/11
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

20. 1. Install the final drive in the reverse order of removal.
Illustration 4 g06191109
Copyright 1993 - 2019 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Wed Dec 11 23:08:24 UTC+0800 2019
3/3(W)
w
2019/12/11
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

21. Suggest:
If the above button click is invalid.
Please download this document
first, and then click the above link
to download the complete manual.
Thank you so much for reading

22. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 320 GC EXCAVATOR BR4
Configuration: 320 GC Excavator BR400001-UP (MACHINE) POWERED BY C4.4 Engine
Disassembly and Assembly
320GC, 320 and 323 Excavators Machine Systems
Media Number -M0080364-08 Publication Date -01/09/2018 Date Updated -12/09/2018
i06999610
Final Drive - Disassemble
SMCS - 4050-015
Disassembly Procedure
Reference: Special Instruction, "Visual Service Procedures - Colors and Symbols" , M0066576
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-2420 Transmission Repair Stand 1
B 439-3938 Link Bracket 3
C 154-6181 Forcing Screw 2
D 138-7574 Link Bracket 2
E
5F-7366 Forcing Screw 1
1P-5546 Crossarm 1
1U-9889 Crossblock 1
1P-0520 Driver Group 1
6V-7888 Puller Leg 2
1H-3112 Bearing Cup Puller Gp 1
1P-5551 Adjustable Screw Assembly 1
Start By:
a. Remove the final drive.
1/14(W)
w
2019/12/11
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...