This document provides disassembly instructions for the transmission of a 12M motor grader. It lists over 50 individual steps to disassemble the entire transmission along with required tools. Pictures and diagrams accompany each step to illustrate parts and their orientation. Safety notices are included to warn of heavy component weights and spring forces during disassembly.
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𝘼𝙣𝙩𝙞𝙦𝙪𝙚 𝙋𝙡𝙖𝙨𝙩𝙞𝙘 𝙏𝙧𝙖𝙙𝙚𝙧𝙨 𝙞𝙨 𝙫𝙚𝙧𝙮 𝙛𝙖𝙢𝙤𝙪𝙨 𝙛𝙤𝙧 𝙢𝙖𝙣𝙪𝙛𝙖𝙘𝙩𝙪𝙧𝙞𝙣𝙜 𝙩𝙝𝙚𝙞𝙧 𝙥𝙧𝙤𝙙𝙪𝙘𝙩𝙨. 𝙒𝙚 𝙝𝙖𝙫𝙚 𝙖𝙡𝙡 𝙩𝙝𝙚 𝙥𝙡𝙖𝙨𝙩𝙞𝙘 𝙜𝙧𝙖𝙣𝙪𝙡𝙚𝙨 𝙪𝙨𝙚𝙙 𝙞𝙣 𝙖𝙪𝙩𝙤𝙢𝙤𝙩𝙞𝙫𝙚 𝙖𝙣𝙙 𝙖𝙪𝙩𝙤 𝙥𝙖𝙧𝙩𝙨 𝙖𝙣𝙙 𝙖𝙡𝙡 𝙩𝙝𝙚 𝙛𝙖𝙢𝙤𝙪𝙨 𝙘𝙤𝙢𝙥𝙖𝙣𝙞𝙚𝙨 𝙗𝙪𝙮 𝙩𝙝𝙚 𝙜𝙧𝙖𝙣𝙪𝙡𝙚𝙨 𝙛𝙧𝙤𝙢 𝙪𝙨.
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2. Shutdown SIS
Previous Screen
Product: MOTOR GRADER
Model: 12M MOTOR GRADER R9B
Configuration: 12M Motor Grader R9B00001-UP (MACHINE) POWERED BY C6.6 Engine
Disassembly and Assembly
12M and 120M Motor Graders Power Train
Media Number -KENR6419-08 Publication Date -01/05/2017 Date Updated -15/05/2017
i07077362
Transmission - Disassemble
SMCS - 3030-015; 3159-015; 3176-015
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 439-3940 Link Bracket 3
B 422-8733 Jack Stand Gp 3
C 1U-9202 Lever Puller Hoist 1
D 1P-1863 Retaining Ring Pliers 1
E 308-3470 Jack Stand Gp 2
F 140-7742 Sleeve 1
G 154-6181 Forcing Bolt 2
H FT-2769 Table 1
J 4C-8156 Lifting Fixture 1
K
1U-6410 Three Jaw Puller 1
1P-0510 Driver Gp 1
L 9U-7480 Compressing Tube 1
5P-7970 Nut 1
8T-4224 Hard Washer 1
- 1
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3. Bolt
M8 - 1.25 by 460mm
M 8B-7548 Push-Puller Tool Gp 1
N 2P-8312 Retaining Ring Pliers 1
P
1P-2321 Combination Puller 1
1P-0510 Driver Gp 1
R
189-0408 Shackle As 1
3E-3882 Eyebolt 1
S
126-7175 Push-Puller Tool Gp 1
4C-5653 Threaded Adapter 1
1P-0510 Driver Gp 1
Start By:
a. Remove the transmission.
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, "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.
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
Note: Put identification marks on all harness assemblies for installation purposes.
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4. Illustration 1 g01386565
1. Attach Tooling (A) and a suitable lifting device to transmission (1). The weight of
transmission (1) is approximately 862 kg (1900 lb). Use Tooling (A) and the suitable lifting
device to position transmission (1) onto Tooling (B). Remove hose assembly (2).
Illustration 2 g01386568
2. Remove bolts (3) to remove control module (4) and spacers (5).
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5. Illustration 3 g01386574
3. Remove yoke assembly (6).
Illustration 4 g01386575
4. Remove retaining ring (7).
5. Remove cup (8). Remove O-ring seal (9).
Illustration 5 g01386579
6. Attach Tooling (A), Tooling (C), and a suitable lifting device to transmission (1). Use
Tooling (A), Tooling (C), and the suitable lifting device to position transmission (1) onto
Tooling (B) and suitable cribbing. Position transmission (1) with the output shaft upward.
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6. Illustration 6 g01386585
Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
7. Remove bolts (10) to remove plate assembly (11).
Illustration 7 g01386589
8. Remove lip seal (12).
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7. Illustration 8 g01386599
9. Use Tooling (D) to remove retaining ring (13). Remove coned disc springs (14).
Note: Note the orientation of coned disc springs (14) for assembly purposes.
Illustration 9 g01386610
10. Remove O-ring seal (15) and piston (16).
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8. Illustration 10 g01386621
11. Remove piston seal (17). Remove piston seal (18).
Illustration 11 g01386624
12. Disconnect harness assembly (19) and harness assembly (21). Remove guard (20).
Illustration 12 g01386632
13. Remove bolts (22). Use two people to remove housing (23). The weight of housing (23) is
approximately 20 kg (45 lb).
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9. Illustration 13 g01386646
14. Remove pressure sensor (24) and the O-ring seal. Remove solenoid (25).
Illustration 14 g01386658
15. Remove O-ring seal (26), O-ring seal (27), O-ring seal (28), O-ring seal (29), and O-ring
seal (30).
Illustration 15 g01386662
16. Remove seal (31).
Illustration 16 g01386663
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10. 17. Remove friction discs (32) and clutch plates (33).
Note: Note the quantity and the order of friction discs (32) and clutch plates (33) for
assembly purposes.
18. Remove O-ring seals (34) and dowels (35).
Illustration 17 g01386675
19. Remove retaining ring (36). Remove hub (37).
Illustration 18 g01386684
20. Attach Tooling (A), Tooling (C), Tooling F, and a suitable lifting device to transmission (1).
Use Tooling (A), Tooling (C), Tooling (F), and the suitable lifting device to position
transmission (1) onto Tooling (B) and Tooling (E) with the output shaft downward. The
weight of transmission (1) is approximately 862 kg (1900 lb).
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11. Illustration 19 g01386730
21. Remove bolt (38) to remove speed sensor (39) and guard (40).
Illustration 20 g01386747
22. Remove bolts (41) to remove speed sensor (42) and speed sensor (43).
Illustration 21 g01386749
23. Remove cover (44).
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12. Illustration 22 g01386757
24. Remove bolts (45) to remove speed sensor (46) and speed sensor (47).
Illustration 23 g01386764
25. Attach Tooling (A), Tooling (C), and a suitable lifting device to housing (49). The weight of
housing (49) is approximately 136 kg (300 lb). Remove bolts (48).
26. Use Tooling (A), Tooling (C), and the suitable lifting device to remove housing (49).
Note: If necessary, use Tooling (G) to assist in removal of housing (49).
Illustration 24 g01386792
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13. 27. Remove O-ring seal (50). Remove bolts (51) and the locks. Remove tube assembly (52) and
the O-ring seal.
Illustration 25 g01386795
28. Remove bolts (53) to remove seal carrier (54). Remove bolts (55) to remove seal carrier
(56).
Illustration 26 g01386797
29. Remove seal rings (57). Remove O-ring seals (58). Repeat this step for the remaining seal
carrier.
Illustration 27 g01386811
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14. Illustration 28 g01386815
30. Use Tooling (J) and a suitable lifting device to remove clutch assembly (59) and clutch
assembly (60). The combined weight of clutch assembly (59) and clutch assembly (60) is
approximately 163 kg (360 lb).
31. Position clutch assembly (59) and clutch assembly (60) onto Tooling (H). If necessary,
support clutch assembly (60) with suitable cribbing.
32. Remove Tooling (J) to separate clutch assembly (59) from clutch assembly (60).
Illustration 29 g01386827
33. Use Tooling (K) to remove bearing (61) and rotor (62) from clutch assembly (59).
Note: Be sure to attach Tooling (K) to gear assembly (63) to prevent damage to rotor (62).
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15. Illustration 30 g01386841
34. Remove thrust washer (64) and gear assembly (63).
Note: Note the orientation of thrust washer (64) for assembly purposes.
Illustration 31 g01386992
35. Remove bearing sleeves (65) from gear assembly (63).
Illustration 32 g01386993
36. Remove thrust washer (66).
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16. Note: Note the orientation of thrust washer (66) for assembly purposes.
Illustration 33 g01386997
Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
37. Use Tooling (L) to compress hub assembly (67). Remove lock rings (68) and two half rings
(69) (not shown).
Note: Note the orientation of lock rings (68) and two ring halves (69) for assembly
purposes.
Illustration 34 g01387088
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17. 38. Remove hub assembly (67), friction discs (70), and clutch plates (71).
Note: Note the order of friction discs (70) and clutch plates (71) for assembly purposes.
Illustration 35 g01387093
39. Remove wave spring (72) and piston (73).
Illustration 36 g01387119
40. Remove seal rings (74) and (75) from piston (73).
Illustration 37 g01387137
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18. 41. Use a suitable lifting device to turn over clutch assembly (59). The weight of clutch
assembly (59) is approximately 59 kg (130 lb).
Illustration 38 g01387150
Illustration 39 g01387221
Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
42. Use Tooling (M) to remove bearing (76). Remove thrust washer (77), thrust disc (78), and
gear assembly (79).
Note: Note the orientation of thrust disc (78) for assembly purposes.
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19. Illustration 40 g01387228
43. Remove thrust disc (80), washer (81), half rings (82), and lock rings (83).
Note: Note the orientation of thrust disc (80) for assembly purposes.
Illustration 41 g01387232
44. Remove hub assembly (84). Remove friction discs (85) and clutch plates (86).
Note: Note the orientation of friction discs (85) and clutch plates (86) for assembly
purposes.
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20. Illustration 42 g01387235
45. Use Tooling (N) to remove retaining ring (87).
46. Remove balance piston (88). Remove seal ring (89) from balance piston (88).
47. Remove springs (90).
48. Remove piston (91). Remove seal rings (92) and (93) from piston (91).
Illustration 43 g01387511
49. Use Tooling (K) to remove inner bearing (94) from clutch assembly (60). Remove thrust
disc (95) and gear (96).
Note: Note the orientation of thrust disc (95) for assembly purposes.
Illustration 44 g01387520
50. Remove thrust disc (97) and gear assembly (98) from clutch assembly (60).
Note: Note the orientation of thrust disc (97) for assembly purposes.
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21. Illustration 45 g01387526
51. Remove sleeve bearing (99) from gear assembly (98).
Illustration 46 g01387528
52. Remove thrust disc (100) and washer (101) from clutch assembly (60).
Note: Note the orientation of thrust disc (100) for assembly purposes.
Illustration 47 g01387541
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22. Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
53. Use Tooling (L) to compress hub assembly (102). Remove lock rings (103) and two half
rings (104) (not shown).
Note: Note the orientation of lock rings (103) and two ring halves (104) for assembly
purposes.
Illustration 48 g01387556
54. Remove hub assembly (102), friction discs (105), and clutch plates (106) from clutch
assembly (60).
Note: Note the orientation of friction discs (105) and clutch plates (106) for assembly
purposes.
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23. Illustration 49 g01387573
55. Remove wave spring (107) and piston (108) from clutch assembly (60).
Illustration 50 g01387580
56. Remove seal rings (109) and (110) from piston (108).
Illustration 51 g01387592
57. Use a suitable lifting device to turn over clutch assembly (60) onto Tooling (H). The weight
of clutch assembly (60) is approximately 54 kg (120 lb).
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24. Illustration 52 g01387595
58. Use Tooling (P) to remove inner bearing (111), thrust disc (112), and gear (113) from clutch
assembly (60).
Note: Note the orientation of thrust disc (112) for assembly purposes.
Illustration 53 g01387755
59. Remove thrust disc (114) and gear assembly (115).
Note: Note the orientation of thrust disc (114) for assembly purposes.
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25. Illustration 54 g01387765
60. Remove bearing (116) from gear assembly (115).
Illustration 55 g01387820
61. Remove thrust disc (117) and washer (118).
Note: Note the orientation of thrust disc (117) for assembly purposes.
Illustration 56 g01387824
Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
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26. 62. Use Tooling (L) to compress hub assembly (119). Remove lock rings (120) and two half
rings (121) (not shown).
Note: Note the orientation of lock rings (120) and two ring halves (121) for assembly
purposes.
Illustration 57 g01387846
63. Remove hub assembly (119), friction discs (122), and clutch plates (123).
Note: Note the orientation of friction discs (122) and clutch plates (123) for assembly
purposes.
Illustration 58 g01387852
64. Remove wave spring (124) and piston (125).
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27. Illustration 59 g01387858
65. Remove seal rings (126) and (127) from piston (125).
Illustration 60 g01387876
66. Use Tooling (P) to remove inner bearing (128) and gear (129) from input shaft assembly
(130). This is necessary at this time so that you can remove the remaining two clutch
assemblies.
Illustration 61 g01387884
67. Remove bolts (131) to remove seal carrier (132).
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28. Illustration 62 g01387892
68. Remove seal rings (133). Remove O-ring seals (134).
Illustration 63 g01387895
69. Attach Tooling (R) and a suitable lifting device to clutch assembly (135). The weight of
clutch assembly (135) is approximately 61 kg (135 lb). Use Tooling (R) and the suitable
lifting device to remove clutch assembly (135). Position clutch assembly (135) onto Tooling
(H).
Illustration 64 g01387898
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29. 70. Use Tooling (P) to remove inner bearing (136), spacer (137), and gear (138) from clutch
assembly (135).
Illustration 65 g01388168
71. Remove spacer (139) and thrust disc (140) from clutch assembly (135).
Note: Note the orientation of thrust disc (140) for assembly purposes.
72. Remove gear assembly (141), thrust disc (142), and washer (143).
Note: Note the orientation of thrust disc (142) for assembly purposes.
Illustration 66 g01388185
73. Remove bearing (144) from gear assembly (141).
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30. Illustration 67 g01388208
Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
74. Use Tooling (L) to compress hub assembly (145). Remove lock rings (146) and two half
rings (147) (not shown).
Note: Note the orientation of lock rings (146) and two ring halves (147) for assembly
purposes.
Illustration 68 g01388240
75. Remove hub assembly (145), friction discs (148), and clutch plates (149).
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12M Motor Grader R9B00001-UP (MACHINE) POWERED BY C6.6 Engine(SEB...
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31. Note: Note the orientation of friction discs (148) and clutch plates (149) for assembly
purposes.
Illustration 69 g01388243
76. Remove wave spring (150) and piston (151).
Illustration 70 g01388246
77. Remove seal rings (152) and (153) from piston (151).
Illustration 71 g01388263
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33. Illustration 72 g01388277
78. Use a suitable lifting device to turn over clutch assembly (135) onto Tooling (H). The
weight of clutch assembly (135) is approximately 41 kg (90 lb).
79. Attach Tooling (S) to clutch assembly (135) to remove inner bearing (154). Remove thrust
race (155), thrust disc (156), thrust disc (157), and gear assembly (158).
Note: Note the orientation of thrust discs (156) and (157) for assembly purposes.
Illustration 73 g01388296
80. Remove roller bearing assembly (159) and thrust disc (160) from clutch assembly (135).
Note: Note the orientation of thrust disc (160) for assembly purposes.
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2021/1/8
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