BRACKET-AIR CLEANER 6N5456 - Caterpillar

Note: A temporary setting of the main relief valve is required before travel crossover relief valves can be tested. Refer to Testing and Adjusting, "Relief Valve (Main) - Test and Adjust".
Position the machine on level ground.
Stop the engine.
Illustration 1 g01221037
Pump compartment (1) Pressure tap (delivery pressure for drive pump) (2) Pressure tap (delivery pressure for idler pump) (3) Pressure tap (power shift pressure)
Connect a 60000 kPa (8700 psi) pressure gauge to pressure tap (1) . Use this pressure gauge to monitor the crossover relief valve pressure setting of the right travel motor.
Connect a 60000 kPa (8700 psi) pressure gauge to pressure tap (2) . Use this pressure gauge to monitor the crossover relief valve pressure setting of the left travel motor.
Connect a 6000 kPa (870 psi) pressure gauge to pressure tap (3) .
Illustration 2 g01638824
Sprocket (left track) (4) Sprocket (5) FT-2547 Blocker Pin
Place blocker pin (5) in sprocket (4) in order to block forward left travel. Refer to Illustration 2.
Start the engine.
Increase the hydraulic oil temperature to 55° 5°C (131° 9°F).
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Monitor (A) Display (B) Keypad (C) Up key (D) Left key (E) Down key (F) Right key (G) Back key (H) Home key (I) OK key (J) Menu key
Start Service Mode and input a fixed power shift pressure of 3300 kPa (480 psi).
Press menu key (J) .Note: If more than 30 seconds pass between pushing the keys on the keypad, the menu mode will be canceled and the previous display will be restored to message display (A) .
Press right key (F) in order to highlight "SERVICE" menu option.
After the "SERVICE" option is highlighted, press OK key (I) .
Illustration 4 g01148206
After OK key (I) is pressed, the screen in Illustration 4 will be displayed. The password for the service menu is "FFF2". The keys for direction are used to input the password. Press left key (D) or right key (F) in order to change the position of the flashing character. Press OK key (I) in order to enter the highlighted character.
After entering the last letter of the password, the monitor will continue with the "SERVICE" screen.
Repeatedly press down key (E) in order to highlight the "DEVICE TEST" line on the display.
After the "DEVICE TEST" line is highlighted, press OK key (I) .
Once the "DEVICE TEST" screen is displayed, press down key (E) until "POWER SHIFT PRES" appears on the display.
When "POWER SHIFT PRES" is highlighted, press OK key (I) .
Place the machine controls at the following settings: engine speed dial 5 and AEC switch OFF. Refer to Testing and Adjusting, "Engine Performance - Test (Engine Speed)" for engine rpm settings.Note: Press OK key (I) within 5 seconds after completion of Step 9.j in order to ensure high idle.
The "POWER SHIFT PRES" will now be displayed. Line 4 of the display will now change to a numeric value. These characters represent the power shift pressure (kPa).
Press left key (D) or right key (F) in order to increase or decrease the numeric value that is displayed on line 4 of