Posted on August 23, 2022

D9T Track-Type Tractor Hydraulic System – Transmission

Illustration 1	g02723446
Front view

Illustration 2	g02723447
Section B-B

Table 1

Specification for 331-4034 Transmission Planetary Gp
Item	Qty	Part	Specification description
1	24	7G-0897 Thrust Disc	Thickness of one new thrust disc is 1.98 ± 0.10 mm (0.078 ± 0.004 inch).
2	8	8E-8304 Thrust Disc	Thickness of one new thrust disc is 1.91 ± 0.10 mm (0.075 ± 0.004 inch).
3	Reverse clutch – Thickness of four new friction discs and three new plates are 42.55 ± 0.56 mm (1.675 ± 0.022 inch).
	4	8E-2729 Friction Disc	Thickness of one new friction disc is 5.59 ± 0.08 mm (0.220 ± 0.003 inch).
	3	3P-7447 Plate	Thickness of one new plate is 6.73 ± 0.08 mm (0.265 ± 0.003 inch).
4	Forward clutch – Thickness of five new friction discs and four new plates are 54.87 ± 0.72 mm (2.160 ± 0.028 inch).
	5	9W-9856 Friction Disc	Thickness of one new friction disc is 5.59 ± 0.08 mm (0.220 ± 0.003 inch).
	4	3P-7447 Plate	Thickness of one new plate is 6.73 ± 0.08 mm (0.265 ± 0.003 inch).
5	Third speed clutch – Thickness of three new friction discs and two new plates are 30.29 ± 0.40 mm (1.193 ± 0.016 inch).
	3	233-9748 Friction Disc	Thickness of one new friction disc is 5.61 ± 0.08 mm (0.221 ± 0.003 inch).
	2	370-8590 Plate	Thickness of one new plate is 6.73 ± 0.08 mm (0.265 ± 0.003 inch).
6	Second speed clutch – Thickness of two new friction discs and one new plates are 17.95 ± 0.24 mm (0.707 ± 0.009 inch).
	2	233-9748 Friction Disc	Thickness of one new friction disc is 5.61 ± 0.08 mm (0.221 ± 0.003 inch).
	1	370-8590 Plate	Thickness of one new plate is 6.73 ± 0.08 mm (0.265 ± 0.003 inch).
7	First speed clutch – Thickness of five new friction discs and four new plates are 37.62 ± 0.82 mm (1.481 ± 0.032 inch).
	5	234-6707 Friction Disc	Thickness of one new friction disc is 4.98 ± 0.10 mm (0.196 ± 0.004 inch).
	4	370-8592 Plate	Thickness of one new plate is 3.18 ± 0.08 mm (0.125 ± 0.003 inch).
8	1	8M-5661 O-Ring Seal	Lubricate each groove and the o-ring seal with oil immediately before the assembly of each bearing.
9	1	7T-5617 Seal As	Lubricate the sealing lip lightly with the lubricant that is being sealed.
10	2	8M-4390 O-Ring Seal	Lubricate each groove and the o-ring seal with oil immediately before the assembly of each bearing.

Illustration 3	g02723476
Rear view

Table 2

Specification for 331-4034 Transmission Planetary Gp
Item	Qty	Part	Specification description
11	12	7H-7658 Spring	Length under test force is 105.56 mm (4.156 inch).
			Test force is 186.83 ± 14.46 N (42.00 ± 3.25 lb).
			Free length after test is 140.49 mm (5.531 inch).
12	24	9H-5537 Spring	Length under test force is 46.832 mm (1.8438 inch).
			Test force is 127.89 ± 10.23 N (28.75 ± 2.30 lb).
			Free length after test is 62.708 mm (2.4688 inch).
13	2	8S-6212 Bolt	Torque to 115 ± 7 N·m (85 ± 5 lb ft).
14	16	5M-7900 Bolt	Torque to 115 ± 7 N·m (85 ± 5 lb ft).
15	1	2S-8926 Bolt	Torque to 115 ± 7 N·m (85 ± 5 lb ft).
16	6	9W-8297 Dowel	Length is 202.00 ± 0.25 mm (7.953 ± 0.010 inch).
			Diameter is 12.637 ± 0.013 mm (0.4975 ± 0.0005 inch).
17	6	9W-8298 Dowel	Length is 159.00 ± 0.25 mm (6.260 ± 0.010 inch).
			Diameter is 12.637 ± 0.013 mm (0.4975 ± 0.0005 inch).