D5N Track-Type Tractor Power Train Caterpillar

The priority valve is located beneath the floorplate in the operator compartment.

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Illustration 1	g00887540
D5N and D6N with FTC CBF1-299 CCG1-399 ALH1-734 CBJ1-399 ALR1-634 AGG1-1334 AKD1-1134 CFH1-0299 CKT1-0399

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Illustration 2	g01248831
D5N with FTC AKD1135-Up AGG1335-Up CFH0300-Up CKT0400-Up

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Illustration 3	g01167618
D6N with FTC CBF300-Up CCG400-Up ALH735-Up CBJ400-Up ALR635-Up

1. Attach the gauge to pressure tap (PV) .

2. Warm the transmission oil to operating temperature.

3. Move the parking brake switch to the Off position.

4. Run the engine at LOW IDLE. Note the pressure on the gauge. The pressure should be 2925 ± 125 kPa (424 ± 18 psi).

5. If the pressure that is observed is not 2925 ± 125 kPa (424 ± 18 psi), perform the following steps:

   1. Move the parking brake switch to the On position. Shut off the engine.
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   Illustration 4	g00937223
   Priority valve

   2. Loosen locknut (2) .

   3. Turn adjustment screw (1) clockwise in order to increase the pressure setting. Turn adjustment screw (1) counterclockwise in order to decrease the pressure setting.

      Note: Turn adjustment screw (1) counterclockwise past the desired pressure setting. Then, turn adjustment screw (1) clockwise to the correct pressure setting. This method of adjustment eliminates any movement in the threads.

   4. Tighten locknut (2) to a torque of 25 ± 4 N·m (18 ± 3 lb ft).

   5. Repeat Steps 3 through 5.