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Personal injury or death can result from sudden machine movement. Sudden movement of the machine can cause injury to persons on or near the machine. To prevent injury or death, make sure that the area around the machine is clear of personnel and obstructions before operating the machine. |
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Injury to personnel can result if they are not in the operator's view. Allow only essential personnel near the machine, and make sure the personnel are in the operator's view when testing, to prevent injury. Make sure checks are done in an open area. |
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Personal injury can result from rotating and moving parts. Moving fan blades and moving parts will throw or cut any object or tool that falls or is pushed into them. Make sure no one is working on, underneath or close to an engine that is running. Make sure the area is free of personnel. |
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| NOTICE |
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Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. 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 in Caterpillar machines. Dispose of all fluids according to local regulations and mandates. |
| Required Tools | |||
|---|---|---|---|
| Tool | Part Number |
Description | Qty |
| A (1) | 1U-7771 | Tachometer | 1 |
| B (1) | 1U-6605 | Reflective Tape | 1 |
| C | 8T-4834 | Swivel Orifice Tee | 1 |
| D | 5K-9090 | O-Ring Seal | 1 |
| E | 6V-3965 | Fitting As | 1 |
| F | 3J-1907 | O-Ring Seal | 1 |
| G | 4C-6500 | Digital Thermometer | 1 |
| H (2) | 198-4234 | Pressure Gauge Tool Gp | 1 |
| J (1) | 198-4236 | Adapter Cable As | 2 |
| K | 198-4238 | Pressure Sensor Gp | 1 |
| ( 1 ) | Tool (A) and Tool (B) are part of the 1U-6602 Photo-Tachometer . |
| ( 2 ) | Tool (H) and Tool (J) are part of the 198-4240 Digital Pressure Indicator . |
- Drive the machine to a smooth, horizontal surface.
- Move propulsion lever (2) to the NEUTRAL position.
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| Illustration 1 | g01162713 |
- Rotate speed dial (3) to the MINIMUM position.
- Move parking brake switch (4) to the ON position.
- Move screed lower switch (6) to the DOWN position. Lower the screed to the ground.
- Move throttle control switch (5) to the LOW IDLE position. Hold the switch in this position for less than 1 second.
- Move engine start switch (1) to the OFF position after the engine reaches low idle.
- Move key switch (7) to the OFF position.
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| Illustration 2 | g01162718 |
- Assemble the tooling. Install Tool (E) on Tool (C). Use the appropriate O-ring seals that are Tool (D) and Tool (F) .
- Open the left front deck cover. Remove the plug from the hose in the left front pump compartment.
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| Illustration 3 | g01162719 |
- Install Tool (C) in the end of the hose. Use the plug which was removed from the hose in order to plug the open port on Tool (C) .
- Install Tool (K) on Tool (E). Use Tool (J) in order to connect Tool (K) to Tool (H) .
- Open the right engine compartment cover.
- Unplug connector (9) to the fan solenoid.
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| Illustration 4 | g01162720 |
- Open the access door on the front, right side of the machine.
- Install a strip of reflective tape Tool (B) on hub (10) of the cooling fan.
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| Illustration 5 | g01162721 |
- Move key switch (7) to the ON position. Move engine start switch (1) to the START position. Release the engine start switch after the engine starts.
Note: Alternatively, the reflective tape may be installed on a fan blade, close to the hub.
- Move throttle control switch (5) to the HIGH IDLE position. Hold the switch in this position for less than 1 second. The engine speed should increase to 2310 rpm.
- Monitor the hydraulic oil temperature with Tool (G). Operate the machine until the oil temperature reaches 43 ± 5.6°C (110 ± 10°F).
- Use Tool (A) to measure fan speed. Fan speed should be 1950 ± 50 RPM.
- If the fan speed is within the specified range, go to Step 25. If the fan speed is outside the specified range, go to Step 22.
- Stop the engine.
- Loosen locknut (11). In order to increase pressure, rotate adjustment screw (12) clockwise. In order to decrease pressure, rotate the adjustment screw counterclockwise.
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| Illustration 6 | g01162725 |
- Hold adjustment screw (12) in place. Tighten locknut (11). Go back to Step 17 in order to recheck the fan speed.
Note: When the pressure is increased, fan speed increases. When the pressure is decreased, fan speed decreases.
- Read the pressure on Tool (H). The pressure should be approximately 13300 kPa (1930 psi).
- Stop the engine. If the pressure is outside the specified range, go to Step 27. If the pressure is within the specified range, go to Step 28.
Note: The maximum allowable fan pressure is 15500 kPa (2250 psi).
- Troubleshoot the fan pump and/or the motor if any of the measurements are not within specifications. Repair any problems. Go back to Step 17 in order to recheck fan speed.
- Remove the tooling.
- Reconnect connector (9) to the fan solenoid.
- Close the engine compartment cover. Close the access door.