LEG-PUSH 1H3108 - Caterpillar

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Release the pressure from the hydraulic system. For additional information on the hydraulic system pressure release, refer to Testing and Adjusting, SENR1390, "System Pressure - Release".
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Fan Pump (1) Pressure tap (2) Fan drive pump
Fan drive pump (2) is located on the right side of the machine. Connect an 8T-0859 Pressure Gauge or a pressure gauge that is rated at 0 to 24130 kPa (0 to 3500 psi) to pressure tap (1) .
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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 to adjust the position of magnetic base (7) in order to align photo pickup (9) .Note: The hydraulic oil must be at normal operating temperature in order to obtain accurate results.
Start the engine. Run the engine at high idle. Operate the lift cylinders and the tilt cylinders in order to warm the hydraulic oil. Bring the hydraulic oil