Caterpillar Cat D6T TRACK-TYPE TRACTOR (Prefix NDY) Service Repair Manual (NDY00001 and up).pdf

Service Repair Manual
Models
D6T TRACK-TYPE TRACTOR

Shutdown SIS
Previous Screen
Product: TRACK-TYPE TRACTOR
Model: D6T TRACK-TYPE TRACTOR NDY
Configuration: D6T XL, XW, LGP Track-Type Tractor NDY00001-UP (MACHINE) POWERED BY C9.3 Engine
Disassembly and Assembly
D6T Track Type Tractor Power Train
Media Number -M0073303-04 Publication Date -01/09/2018 Date Updated -06/09/2018
i06746339
Transmission - Disassemble
SMCS - 3030-015
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-2420 Transmission Repair Stand 1
B 136-1452 Retaining Ring Pliers As 1
C 421-5663 Lifting Eye Assembly 3
D 477-3190 Eyebolt Assembly 3
E 316-0706 Pliers - Locking 1
F 156-7100 Slide Hammer Puller Gp 1
G 421-5662 Lifting Eye Assembly 3
For access to a video of this procedure, scan the QR code below with a QR enabled device, or copy
the link below.
1/30
D6T XL, XW, LGP Track-Type Tractor NDY00001-UP (MACHINE) POWERED B...
2021/5/12
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...

Illustration 1 g06247857
Table 2
Caterpillar Channel1
Media
Number:
CATU1334
Title: D6T Transmission Disassembly
Channel1
URL:
https://channel1.mediaspace.kaltura.com/media/D6T+Transmission+Repair/1_h6okgcnr
Start By:
a. Separate the transmission and bevel gears.
Note: The transmission modulating valves must be recalibrated if any of the following procedures are
performed:
• The transmission modulating valve and/or the solenoid is replaced.
• The transmission is serviced or the transmission is replaced.
• The electronic control module is replaced.
Reference: Refer to Testing and Adjusting, "Transmission Clutch Pressure - Test".
Note: The friction discs and the clutch plates from the individual clutches must be kept in the correct
order. The friction discs and the clutch plates must be kept with the original clutch housings. The
different clutches use different friction material. Do not mix the clutch plates and friction plates.
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Note: The weight of the transmission is approximately 458 kg (1010 lb). Mark the housings for
alignment during the assembly procedure.
1. Remove O-ring seals (1) and (4) from the transmission cover.
2. Remove bolts (3) (not shown), and the strips (not shown).
3. Remove tubes (2) and the O-ring seals.
4. Remove fittings (5) and the O-ring seals.
Remove locknut (6). Position the receptacle assembly into the case.
5. Completely disconnect harness assembly (7) from all locations.
6. Remove bolts (8) and sensor (9).
7. Remove bolts (10) (not shown) and sensor (11).
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8. Remove O-ring seal (12) from sensor (9). Repeat for the other sensor.
9. Remove bolts (13) and harness assembly (7).
10. Remove valve assemblies (14).
11. Remove fitting (15), bolts (16), and solenoid valve (17) from valve assembly (14).
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12. Remove O-ring seals (18) from solenoid valve (17).
13. Repeat Steps 11 and 12 for the remaining valve assemblies (14).
14. Remove valve assemblies (19) and the orifice plates.
15. Remove fitting (20), nut (21), and coil assembly (22) from valve assembly (19). Repeat for the
remaining valve assembly (19).
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16. Remove bolts (23) and valve assembly (24).
Personal injury can result from parts and/or covers under spring
pressure.
Spring force will be released when covers are removed.
Be prepared to hold spring loaded covers as the bolts are loosened.
17. Use a suitable prybar to raise hub clutch (28). Remove retaining ring (25).
18. Remove four bolts (29).
19. Remove bolts (26) and (30) in an alternating pattern until the spring force is relieved.
20. Remove manifold (27).
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21. Remove the retaining ring and bearing (31).
22. Remove dowels (35), springs (33), and rods (34) (not shown).
23. Remove friction disc (32), clutch plate (36), and friction disc (37) (not shown).
24. Remove seal rings (40) and O-ring seal (39).
25. Use Tooling (B) and two people to compress retaining ring (38). With retaining ring (38)
compressed remove rotating housing (41) and retaining ring (38).
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Do not remove the retaining ring until the spring force has been
released. Failure to do so could result in personal injury or death. In
order to prevent this, use a suitable press to hold the spring force while
the retaining ring is removed. Slowly release the spring tension with the
press after the retaining ring has been removed.
Note: Be sure not to overcompress bevel springs (44). Ensure that adequate space is between
the tooling and retaining ring (41).
26. Position rotating housing (41) into a suitable press.
27. Use suitable tooling to apply pressure to ring (42).
28. Depress bevel springs (44) enough to remove retaining ring (43).
29. Remove ring (42).
30. Remove springs (44) and note the orientation of springs (44) for assembly purposes.
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31. Remove piston (45) from rotating housing (41).
32. Remove seal rings (46).
33. Remove retaining ring (49).
34. Remove hub clutch (47), clutch discs (48), and the plates.
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35. Remove retaining ring (50) and hub clutch (51).
Note: Rotate output shaft (54) as needed to gain access to all bolts (53).
36. Remove retaining rings (52) and bolts (53).
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D6T XL, XW, LGP Track-Type Tractor NDY00001-UP (MACHINE) POWERED ...
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pressure.
37. Remove piston (59).
38. Remove nine bolts (55).
39. Equally loosen bolts (56) and (57) in an alternating pattern until the spring force is relieved.
40. Use two people to remove clutch housing (58). The weight of clutch housing (58) is
approximately 35 kg (77 lb).
41. Remove seal rings (60) from piston (59).
42. Remove retaining ring (61) and hub assembly (62) from clutch housing (58).
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43. Remove seal rings (64) and bearing (63).
44. Remove O-ring seal (65).
45. Remove springs (66), rods (67) (not shown), and dowels (68).
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46. Remove ring gear (69).
47. Remove clutch discs (70) and plate (71).
NOTICE
To avoid damage, use two bolts (55) as guides. Do not engage the
threads.
48. Attach Tooling (C) and a suitable lifting device to clutch housing (72). The weight of clutch
housing (72) is approximately 60 kg (132 lb).
49. Remove clutch housing (72).
50. Position clutch housing (72) on suitable cribbing.
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pressure.
51. Remove piston (73).
52. Remove retaining rings (75), retainers (74), the springs, and the poppets.
53. Remove plug (76) and the O-ring seal.
54. Remove seals (77) from piston (73).
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55. Attach Tooling (D) and a suitable lifting device to clutch hub (79). The weight of clutch hub
(79) is approximately 45 kg (100 lb).
56. Use Tooling (E) and suitable cribbing to compress retaining ring (78) (not shown), and remove
clutch hub (79).
57. Remove retaining ring (78) (not shown).
58. Position shaft assembly (81) onto suitable cribbing.
59. Remove retaining ring (80) and sun gear (82).
Note: Note the orientation of shafts (83) for assembly purposes.
60. Use tooling (F) to remove shafts (83)
61. Remove thrust discs (84), gears (85), and the bearings.
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62. Remove clutch hub (79).
63. Reposition shaft assembly (81) by 180 degrees.
65. Remove ring gear (86) and the O-ring seal.
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66. Position shaft assembly (81) as shown in Illustration 36.
67. Position retaining ring (88) to Location (X) as shown in Illustration 37.
68. Use a suitable mallet to position gear (90) to Location (X) as show in Illustration 38.
70. Remove gear (90) and the bearing.
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71. Remove ring (91) and remove retaining ring (88) (not shown).
72. Remove bushings (92).
73. Position clutch hub (79) by 180 as shown in Illustration 40.
74. Remove retaining ring (93) and reaction plate (94).
76. Remove clutch discs (96) and plates (97) from clutch hub (79).
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77. Position clutch hub (79), as shown in Illustration 42, and remove three bolts (98).
78. Remove planetary carrier assembly (99) and the O-ring seals at location (Y) as shown in
Illustration 42.
Typical Example
Do not remove the retaining ring until the spring force has been
released. Failure to do so could result in personal injury or death. In
order to prevent this, use a suitable press to hold the spring force while
the retaining ring is removed. Slowly release the spring tension with the
press after the retaining ring has been removed.
Note: Be sure not to overcompress bevel springs (103). Ensure that adequate space is between
the tooling and retaining ring (102).
79. Position gear ring (100) into a suitable press. Use suitable tooling to apply pressure to ring
(101).
80. Depress bevel springs (103) enough to remove retaining ring (102).
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Typical Example
82. Remove bevel springs (103) and note the orientation of bevel springs (103) for assembly
purposes.
Typical Example
83. Remove piston (104) from gear ring (100).
Typical Example
84. Remove seals (105).
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85. Remove carrier assembly (107) and ring gear (106).
86. Remove retaining ring (108) (not shown), gear (109), and the bearing.
87. Remove carrier assembly (110).
88. Remove the bearings from output shaft (54).
89. Drive spring pin (111) into shaft (112) and remove shaft (112).
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90. Remove gear (113), thrust washers (114) (not shown), and the bearing.
91. Use a suitable punch to remove spring pin (111) (not shown) from shaft (112).
92. Repeat steps 89 and 91 for the remaining shafts.
94. Remove three bolts (116) and sensor rotor (117).
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pressure.
95. Remove bolts (122) and (119).
96. Equally loosen bolts (118) and (120) in an alternating pattern until the spring force is relieved.
97. Remove clutch housing (121).
98. Position clutch housing (121) on the other side to gain access to the piston.
99. Remove the piston from clutch housing (121).
100. Remove the seals from the piston.
101. Remove clutch plate (123), dowels (124), springs (125), and rods (126) (not shown).
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102. Remove clutch discs (127) and plates (129).
103. Use two people to remove carrier assembly (128). The weight of carrier assembly (128) is
approximately 30 kg (66 lb).
105. Remove ring gear (133) and seal (134).
106. Remove gear (137) and gear assembly (136).
107. Remove O-ring seal (135) (not shown).
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108. Remove retaining ring (138) and bearing (139).
110. Remove gears (142), thrust washers (141), and bearings (144).
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111. Use a suitable punch to remove spring pin (140) (not shown ) from shaft (143).
112. Repeat Steps 109 and 111 for remaining the shafts.
113. Remove bolts (145) and center plate (146).
114. Remove friction discs (147) and clutch plates (148).
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115. Remove carrier assembly (149).
116. Remove seal (150).
117. Remove retaining ring (151) and remove bearing (152).
118. Compress retaining ring (153) and remove gear (154).
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120. Remove gear (158), washers (156), and bearing (159).
121. Use a suitable punch to remove spring pin (155) (not shown) from shaft (157).
122. Repeat steps 119 through 121 for remaining shafts (157).
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123. Remove seal (160).
124. Attach tooling (G) and a suitable lifting device to clutch housing assembly (161). The weight
of clutch housing assembly (161) is approximately 51 kg (112 lb).
125. Remove clutch housing assembly (161).
126. Position clutch housing assembly (161) to gain access to retaining ring (162).
128. Remove shaft assembly (163).
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129. Remove O-ring seals (164) and seal (165).
130. Remove retaining ring (166) and bearing (167).
131. Position clutch housing assembly (161) as shown in Illustration 73and remove piston (168).
132. Remove the seals from piston (168).
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All Rights Reserved.
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Shutdown SIS
Previous Screen
Product: TRACK-TYPE TRACTOR
Model: D6T TRACK-TYPE TRACTOR NDY
Configuration: D6T XL, XW, LGP Track-Type Tractor NDY00001-UP (MACHINE) POWERED BY C9.3 Engine
Disassembly and Assembly
D6T Track Type Tractor Power Train
Media Number -M0073303-04 Publication Date -01/09/2018 Date Updated -06/09/2018
i06746625
Transmission - Assemble
SMCS - 3030-016
Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-2420 Transmission Repair Stand 1
B 136-1452 Retaining Ring Pliers As 1
C 421-5663 Lifting Eye Assembly 3
D 477-3190 Eyebolt Assembly 3
E 316-0706 Pliers 1
G 421-5662 Lifting Eye Assembly 3
For access to a video of this procedure, scan the QR code below with a QR enabled device, or copy the
link below.
1/28
2021/5/12

Table 2
Caterpillar Channel1
Media
Number:
CATU1452
Title: D6T Transmission Assembly
Channel1
URL:
https://channel1.mediaspace.kaltura.com/media/D6T+Transmission+Assembly/0_uu4hp2vz
NOTICE
New seal rings must be preloaded before they are installed to prevent
them from being damaged or broken. There is a correct method to
preload new seal rings prior to installation. Place your hands on each
end of the seal ring, and pull (wind) the ends several inches past each
other or until they almost make contact. Use care to keep the ring
shaped like a circle. This will make an even bend (or ring "set") all
around the ring. When the seal ring is in the groove of the hub, the
ends must butt together lightly. Do not bend the seal ring. This does
not make an even bend all the way around the ring.
Do not attempt to use this method to preload a used seal ring. Also, do
not use this procedure for cast iron seal rings. This will cause used or
cast iron seal rings to break.
Note: The friction discs and the clutch plates from the individual clutches must be kept in the correct
order. The friction discs and the clutch plates must be kept with the original clutch housings. The different
clutches use different friction material. The friction discs and the clutch plates cannot be swapped.
Note: Lubricate the seals with the lubricant that is being sealed prior to installation.
1. Install the seals onto piston (168).
2. Install piston (168) into clutch housing (161).
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3. Install bearing (167) and retaining ring (166).
4. Install seal (165) and O-ring seals (164).
5. Install shaft assembly (163).
6. Reposition clutch housing assembly (161) and install retaining ring (162).
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7. Attach tooling (F) and a suitable lifting device to clutch housing assembly (161). The weight of
clutch housing assembly (61) is approximately 51 kg (112 lb).
8. Install clutch housing assembly (161).
9. Install seal (160).
10. Install bearing (159) into gear (158).
11. Install washers (156) and gear (158).
12. Install shaft (157) and spring pin (155).
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13. Repeat Step 10 through 12 for remaining shafts (157).
14. Install gear (154) and retaining ring (153).
16. Install seal (150).
17. Install carrier assembly (149).
5/28
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18. Install clutch plates (148) and friction discs (147).
19. Install center plate (146) and bolts (145).
6/28
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20. Install bearings (144) into gears (142).
21. Install washers (141) and gears (142).
22. Install shaft (143) and spring pin (140).
23. Repeat Step 20 through 22 for the remaining shafts.
25. Install O-ring seal (135) (not shown). Install gear assembly (136) and gear (137).
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26. Install seal (134) and ring gear (133).
27. Install retaining ring (132).
28. Use two people to install carrier assembly (128). Weight of carrier assembly (128) is approximately
30 kg (66 lb).
29. Install plates (129) and clutch discs (127).
30. Install rods (126) (not shown), springs (125), dowels (124), and clutch plate (123).
8/28
2021/5/12

Caterpillar Cat D6T TRACK-TYPE TRACTOR (Prefix NDY) Service Repair Manual (NDY00001 and up).pdf

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Caterpillar Cat D6T TRACK-TYPE TRACTOR (Prefix NDY) Service Repair Manual (NDY00001 and up).pdf