LINES GP-BRAKE OIL COOLER 3742247 - Caterpillar

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Fan Guard (3) Bolts (4) Grill
Remove eight bolts (3) and grill (4) .
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Fan Guard Assembly (5) Bolts (6) Finger guard assembly
To check the speed of the fan drive motor, use a 9U-7400 Multitach. The multitach can measure the speed of the fan drive motor by using reflective tape and a photo pickup.Reference: For additional information on the Multitach Group, refer to Special Instruction, NEHS0605, "9U-7400 Multitach II Group and 9U-7402 Multitach II Group".If a piece of reflective tape is already visible on one of the fan blades, proceed to Step 5. If no reflective tape is visible on one of the fan blades, use the following steps:Note: Only one piece of reflective tape should be applied to the fan.
Remove two bolts (5). Remove finger guard assembly (6) .
Clean a small area on the surface of one fan blade. Position the tape so that the tape is completely visible. Attach 50 mm (2 inch) of 1U-6605 Reflective Tape on the fan blade.
Install finger guard assembly (6). Install bolts (5) and tighten the bolts.
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9U-7400 Multitach (7) Magnetic base (8) Multitach (9) Photo pickup (10) Fan drive motor
Assemble photo pickup (9) into the clamp on magnetic base (7). Attach magnetic base (7) to the fan guard assembly.
Position the photo pickup (9) so the reflective tape is aligned with the photo pickup. The LED indicator (red light) turns on when the reflective tape and photo pickup are aligned. To check for correct alignment, use a long, narrow object to reach between the fan guards and manually rotate the fan.Note: The speed of the fan drive motor is more critical than the oil pressure.Note: When you start the engine, vibrations and air flow from the fan may cause the photo pickup to become misaligned. It may be necessary