TA22-4WD Agricultural Transmission Caterpillar

Transmission Control

Usage:

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Illustration 1	g01296206

The TA22 - M4WD Transmission has the following standard features:

16 forward gears
4 reverse gears

See Table 1 for information regarding the gear ratios.

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Table 1
Gear Type
Gear Ratios	High-Contact Ratio Gears
1F	8.442
2F	6.648
3F	5.253
4F	4.137
5F	3.474
6F	3.086
7F	2.736
8F	2.430
9F	2.162
10F	1.920
11F	1.702
12F	1.512
13F	1.270
14F	1.000
15F	0.790
16F	0.622
1R	10.553
2R	4.343
3R	3.857
4R	1.587

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Illustration 2	g01292954

The controls for the TA22 -M4WD Transmission and the operation of the TA22 - M4WD Transmission will be controlled within the operator's cab of the Original Equipment Manufacturer (OEM). The main harness assembly (1) will connect with the tranmission control harness from the operator cab.

Transmission System

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Illustration 3	g01295013

Oil that is supplied to the transmission hydraulic control system is delivered into the modulating valves and into the relief valve.

When the modulating valves are energized, oil flows to the transmission clutches. When the modulating valves are de-energized, oil flows from the valve to the common sump.

The main relief valve regulates the pressure in the transmission hydraulic control system to a maximum pressure of 2100 kPa (305 psi).

Excess oil flows from the main relief valve to the transmission oil cooler. The cooler bypass valve will open if the pressure reaches 520 kPa (75 psi) at the input side of the transmission oil cooler. Normally, the cooler bypass valve will remain closed unless there is a restriction in the transmission oil cooler or if the oil is very cold.

Oil from the transmission oil cooler flows to the transmission for lubrication of the clutches. The transmission lubrication relief valve regulates the oil pressure for lubrication to 275 kPa (40 psi).

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