COVER AS 1127368 - Caterpillar

Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Sudden movement or accidental starting of the machine can cause personal injury or death to persons on or near the machine.To prevent personal injury or death, perform the following:Park the machine on a smooth, level surface.Lower the work tool to the ground and engage the parking brake.Stop the engine and remove the key.Block the wheels and install the steering frame lock.
Machine Preparation
Table 1
Required Tools    
Part Number     Description     Qty    
9U-7400     Multitach Tool Group     1    Note: In order to check the speed of the fan drive motor, use a 9U-7400 Multitach Tool Group. The multitach can measure the speed of the fan drive motor by using reflective tape and a photo pickup. Follow the procedure that follows in order to install the Multitach Tool Group.
Illustration 1 g00760034
Grill Assembly (1) Bolts. (2) Grill.
Remove eight bolts (1) and grill (2) .
If a piece of reflective tape is already visible on one of the fan blades, proceed to Step 4. If a piece of reflective tape is not visible on one of the fan blades, clean a small area on the surface of one fan blade. Then attach 50 mm (2.0 inch) of 1U-6605 Reflective Tape to the fan blade. Position the reflective tape so that the tape is completely visible.
Illustration 2 g00760035
Finger Guard Assembly (3) Bolts. (4) Finger guard.
Remove two bolts (3). Remove finger guard (3) in order to access the fan blades.
Illustration 3 g00760036
Placement of 9U-7400 Multitach Tool Group (5) Magnetic base. (6) Multitach. (7) Photo pickup. (8) Fan drive motor.
Install finger guard (4). Install bolts (3) and tighten the bolts. Place photo pickup (7) into the holder on magnetic base (5) and tighten the screw. Attach magnetic base (5) to the fan guard assembly.
When the reflective tape is aligned with photo pickup (7), the LED indicator (red light) should turn on. Position photo pickup (7) accordingly. To check for correct alignment, use a long, narrow object to reach between the fan guards and manually rotate the fan.Reference: For additional information on the Multitach Tool Group, refer to Special Instruction, NEHS0605, "9U-7400 Multitach II Group and 9U-7402 Multitach II Group".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 to adjust the position of magnetic base (5) in order to align photo pickup (7) .Testing and Adjusting Fan Speed
Illustration 4 g00760055
Right Side View of Machine (9) Thermostatic valve. (10) Location of fan drive pump.