446B Backhoe Loader Transmission (Autoshift) Transmission (Autoshift) Caterpillar


Transmission (Autoshift)
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Illustration 1g00821341

179-2833 Powershift Transmission Gp

(1) The thickness of six new discs and six new plates for the Forward High Clutch is 23.28 ± .8 mm (0.917 ± 0.03 inch).

Thickness of one new 6Y-7929 Friction Disc ... 2.05 ± 0.08 mm (0.081 ± 0.003 inch)
Thickness of one worn 6Y-7929 Friction Disc ... 2.05 ± .25 mm (0.081 ± 0.01 inch)
Thickness of one new 6T-9194 Clutch Plate ... 1.83 ± 0.05 mm (0.072 ± 0.002 inch)

(2) The thickness of five new discs and five new plates for the Forward Low Clutch is 19.25 ± .65 mm (0.758 ± 0.026 inch).

Thickness of one new 6Y-7929 Friction Disc ... 2.05 ± 0.08 mm (0.081 ± 0.003 inch)
Thickness of one worn 6Y-7929 Friction Disc ... 2.05 ± .25 mm (0.081 ± 0.01 inch)
Thickness of one new 6T-9194 Clutch Plate ... 1.83 ± 0.05 mm (0.072 ± 0.002 inch)

(3) Shim the shaft in order to obtain a maximum end play. ... 0.03 to 0.08 mm (.001 to .003 inch)

Note: Assemble the spacer against the bearing cup and the thin shims in the center of the pack.

121-7398 Spacer

Thickness ... 2.00 mm (0.079 inch)
Outside Diameter ... 79.5 mm (3.13 inch)

121-7399 Shim

Thickness ... 0.05 mm (0.002 inch)
Outside Diameter ... 79.5 mm (3.13 inch)

121-7400 Shim

Thickness ... 0.08 mm (0.002 inch)
Outside Diameter ... 79.5 mm (3.13 inch)

121-7401 Shim

Thickness ... 0.18 mm (0.007 inch)
Outside Diameter ... 79.5 mm (3.13 inch)

121-7402 Shim

Thickness ... 0.60 mm (0.024 inch)
Outside Diameter ... 79.5 mm (3.13 inch)

(4) The thickness of eight new discs and eight new plates for the First Speed Clutch is 31.04 ± 1.04 mm (0.758 ± 0.026 inch).

Thickness of one new 6Y-7929 Friction Disc ... 2.05 ± 0.08 mm (1.222 ± 0.041 inch)
Thickness of one worn 6Y-7929 Friction Disc ... 2.05 ± .25 mm (0.081 ± 0.01 inch)
Thickness of one new 6T-9194 Clutch Plate ... 1.83 ± 0.05 mm (0.072 ± 0.002 inch)

(5) Shim the first speed clutch in order to obtain a maximum end play. ... 0.03 to 0.08 mm (.001 to .003 inch)

Note: Assemble the spacer against the bearing cup and the thin shims in the center of the pack.

7T-2646 Spacer

Thickness ... 1.00 mm (0.039 inch)
Outside Diameter ... 79.5 mm (3.13 inch)

6T-9163 Shim

Thickness ... 0.60 mm (0.024 inch)
Outside Diameter ... 79.5 mm (3.13 inch)

6T-9164 Shim

Thickness ... 0.18 mm (0.007 inch)
Outside Diameter ... 79.5 mm (3.13 inch)

6T-9165 Shim

Thickness ... 0.08 mm (0.003 inch)
Outside Diameter ... 79.5 mm (3.13 inch)

6T-9166 Shim

Thickness ... 0.05 mm (0.002 inch)
Outside Diameter ... 79.5 mm (3.13 inch)

(6) Shim the second speed and the third speed clutch in order to obtain a maximum end play. ... 0.03 to 0.08 mm (.001 to .003 inch)

Note: Assemble the spacer against the bearing cup and the thin shims in the center of the pack.

7T-2646 Spacer

Thickness ... 1.00 mm (0.039 inch)
Outside Diameter ... 79.5 mm (3.13 inch)

6T-9163 Shim

Thickness ... 0.60 mm (0.024 inch)
Outside Diameter ... 79.5 mm (3.13 inch)

6T-9164 Shim

Thickness ... 0.18 mm (0.007 inch)
Outside Diameter ... 79.5 mm (3.13 inch)

6T-9165 Shim

Thickness ... 0.08 mm (0.003 inch)
Outside Diameter ... 79.5 mm (3.13 inch)

6T-9166 Shim

Thickness ... 0.05 mm (0.002 inch)
Outside Diameter ... 79.5 mm (3.13 inch)

(7) The thickness of eight new discs and eight new plates for the Second Speed Clutch is 31.04 ± 1.04 mm (1.222 ± 0.041 inch).

Thickness of one new 6Y-7929 Friction Disc ... 2.05 ± 0.08 mm (0.081 ± 0.003 inch)
Thickness of one worn 6Y-7929 Friction Disc ... 2.05 ± .25 mm (0.081 ± 0.01 inch)
Thickness of one new 6T-9194 Clutch Plate ... 1.83 ± 0.05 mm (0.072 ± 0.002 inch)

(8) The thickness of five new discs and five new plates for the Third Speed Clutch is 19.25 ± .65 mm (0.758 ± 0.026 inch).

Thickness of one new 6Y-7929 Friction Disc ... 2.05 ± 0.08 mm (0.081 ± 0.003 inch)
Thickness of one worn 6Y-7929 Friction Disc ... 2.05 ± .25 mm (0.081 ± 0.01 inch)
Thickness of one new 6T-9194 Clutch Plate ... 1.83 ± 0.05 mm (0.072 ± 0.002 inch)

(9) The thickness of eight new discs and eight new plates for the All Wheel Drive Clutch is 31.04 ± 1.04 mm (1.222 ± 0.041 inch).

Thickness of one new 6Y-7929 Friction Disc ... 2.05 ± 0.08 mm (0.081 ± 0.003 inch)
Thickness of one worn 6Y-7929 Friction Disc ... 2.05 ± .25 mm (0.081 ± 0.01 inch)
Thickness of one new 6T-9194 Clutch Plate ... 1.83 ± 0.05 mm (0.072 ± 0.002 inch)

(10) Shim the output shaft for the front transfer drive in order to obtain a maximum end play. ... 0.03 to 0.08 mm (.001 to .003 inch)

Note: Assemble the spacer against the bearing cup and the thin shims in the center of the pack.

122-1879 Spacer

Thickness ... 2.00 mm (0.08 inch)
Outside Diameter ... 67.5 mm (2.66 inch)

104-3288 Shim

Thickness ... 0.05 mm (0.002 inch)
Outside Diameter ... 67.5 mm (2.66 inch)

121-2059 Shim

Thickness ... 0.08 mm (0.003 inch)
Outside Diameter ... 67.5 mm (2.66 inch)

121-2060 Shim

Thickness ... 0.18 mm (0.007 inch)
Outside Diameter ... 67.5 mm (2.66 inch)

121-2061 Shim

Thickness ... 0.6 mm (0.024 inch)
Outside Diameter ... 67.5 mm (2.66 inch)



Illustration 2g00746729

(11) The thickness of five new discs and five new plates for the Reverse Clutch is 19.25 ± 0.65 mm (0.758 ± 0.026 inch).

Thickness of one new 6Y-7929 Friction Disc ... 2.05 ± 0.08 mm (0.081 ± 0.003 inch)
Thickness of one worn 6Y-7929 Friction Disc ... 2.05 ± .25 mm (0.081 ± 0.01 inch)
Thickness of one new 6T-9194 Clutch Plate ... 1.83 ± 0.05 mm (0.072 ± 0.002 inch)

(12) Shim the reverse shaft in order to obtain a maximum end play. ... 0.03 to 0.08 mm (.001 to .003 inch)

Note: Assemble the spacer against the bearing cup and the thin shims in the center of the pack.

122-1879 Spacer

Thickness ... 2.00 mm (0.08 inch)
Outside Diameter ... 67.5 mm (2.66 inch)

104-3288 Shim

Thickness ... 0.05 mm (0.002 inch)
Outside Diameter ... 67.5 mm (2.66 inch)

121-2059 Shim

Thickness ... 0.08 mm (0.003 inch)
Outside Diameter ... 67.5 mm (2.66 inch)

121-2060 Shim

Thickness ... 0.18 mm (0.007 inch)
Outside Diameter ... 67.5 mm (2.66 inch)

121-2061 Shim

Thickness ... 0.60 mm (0.024 inch)
Outside Diameter ... 67.5 mm (2.66 inch)

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