MANIFOLD-CENTER 4N1686 - Caterpillar

Table 1
Required Tools
Part Number Description Qty
9U-7400 Multitach Tool Group 1
Table 2
Cooling fan speeds
Maximum Speed Standard and Low Noise 1250 30 rpm
High Ambient 1360 30 rpm
Minimum Speed Standard and Low Noise 880 30 rpm
High Ambient 900 30 rpm
Position the machine on level ground.
Stop the engine.
Install 9U-7400 Multitach II Group on the cooling fan.
Start the engine.
Place the machine controls at the following settings: engine speed dial 10 and AEC switch OFF. Refer to Testing and Adjusting, "Engine Performance - Test (Engine Speed)" for engine rpm settings.
Illustration 1 g01321378
(A) Display
(B) Keypad
(C) Up key
(D) Left key
(E) Down key
(F) Right key
(G) Cancel key
(H) home key
(I) OK key
(J) Menu key
Start Service Mode and bring up "CALIBRATIONS" mode. Bring up "FAN SPEED" mode. "FAN SPEED" mode is within "CALIBRATIONS" mode.
Press menu key (J). Note: If more than 30 seconds pass between pushing the keys on the keypad, the menu mode will be cancelled 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 2 g01148206
After Ok key (I) is pressed, the screen in Illustration 2 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 "CALIBRATIONS" line on the display.
After the "CALIBRATIONS" line is highlighted, press OK key (I).
Once the "CALIBRATIONS" screen is displayed, press down key (E) in order to highlight the "FAN SPEED" line on the display.
After the "FAN SPEED" line is highlighted, press OK key (I). Note: When you press the "OK" key (I), the monitor will prompt you to set the tachometer. Press OK key (I) in order to proceed to validate the minimum and maximum cooling fan speeds.
A set of blue numbers will appear on monitor display (A). These numbers represent the minimum speed of the cooling fan in revolutions per minute (rpm). Observe the rpm reading of the tachometer. Refer to Table 2 for the proper rpm setting of the cooling fan at minimum speed.
The speed adjustment of the cooling fan is controlled by left key (D) and right key (F). Press left