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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 or death can result from improperly checking for a leak. Always use a board or cardboard when checking for a leak. Escaping air or fluid under pressure, even a pin-hole size leak, can penetrate body tissue causing serious injury, and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury. |
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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, and the 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. |
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| NOTICE |
|---|
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 | 148-8392 | Elbow As | 1 |
| D | 7X-0873 | Tee | 1 |
| E | 6V-9746 | O-Ring Seal | 1 |
| F | 6V-3965 | Fitting As | 1 |
| G | 3J-1907 | O-Ring Seal | 1 |
| H | 4C-6500 | Digital Thermometer | 1 |
| J (2) | 198-4234 | Pressure Gauge Tool Gp | 1 |
| K (2) | 198-4236 | Adapter Cable As | 2 |
| L | 198-4238 | Pressure Sensor Gp | 1 |
| ( 1 ) | Tool (A) and Tool (B) are part of the 1U-6602 Photo-Tachometer . |
| ( 2 ) | Tool (J) and Tool (K) are part of the 198-4240 Digital Pressure Indicator . |
- Drive the machine to a smooth, horizontal surface.
- Move propulsion lever (3) to the NEUTRAL position.
 | |
| Illustration 1 | g01225936 |
- Move parking brake switch (2) to the ON position.
- Make sure that rotor switch (4) is in the OFF position.
- Make sure that conveyor switch (1) is in the OFF position.
- Make sure that water spray switch (9) is in the OFF position.
 | |
| Illustration 2 | g01225941 |
- If necessary, use conveyor joystick (7) in order to lower the conveyor.
| NOTICE |
|---|
Make sure that the conveyor will not contact any obstacles when the machine is raised. |
- Move elevation control switch (8) (all legs) to the RAISE position. Release the switch when the machine is completely raised.
- Move throttle switch (10) to the LOW IDLE position.
- Move engine hood switch (6) to the RAISE position. Hold the switch until the hood is completely open.
- Install hood prop rod (11) .
 | |
| Illustration 3 | g01225945 |
- Move engine hood switch (6) to the LOWER position. Release the switch when the hood prop rod is seated.
- Move key switch (5) to the OFF position.
- Install leg lock (12) on each of the four legs.
 | |
| Illustration 4 | g01225946 |
- Assemble the fittings (Tools (C), (D), (E), (F), and (G) ).
- Disconnect fan supply hose (14) from the fan valve.
 | |
| Illustration 5 | g01226279 |
- Connect elbow (13) (Tool (C) ) to the fan valve. Connect supply hose (14) to Tool (D) .
- Install Tool (L) on Tool (F). Use Tool (K) in order to connect Tool (L) to Tool (J) .
- Unplug fan solenoid connector (15) .
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| Illustration 6 | g01226282 |
- Open the rear access door.
- Install a strip of reflective tape (Tool (B) ) on cooling fan (16) .
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| Illustration 7 | g01226283 |
- Move key switch (5) to the START position. Release the key switch when the engine starts.
- Operate the engine for a few minutes at low idle. Move throttle switch (10) to the HIGH IDLE position. The engine speed should increase to 2250 rpm.
- Monitor the hydraulic oil temperature with Tool (H). Operate the machine until the oil temperature reaches a minimum of 40 °C (104 °F).
- Use Tool (A) to measure fan speed. Fan speed should be 1100 ± 50 rpm.
- If the fan speed is within the specified range, go to Step 30. If the fan speed is outside the specified range, go to Step 27.
- Stop the engine.
- Loosen locknut (17). In order to increase fan speed, rotate adjustment screw (18) clockwise. In order to decrease fan speed, rotate the adjustment screw counterclockwise.
Note: When the pressure is increased, fan speed increases. When the pressure is decreased, fan speed decreases.
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| Illustration 8 | g01226284 |
- Hold adjustment screw (18) in place, and tighten locknut (17). Go back to Step 22 in order to recheck the fan speed.
- Read the pressure on Tool (J) .
Note: The maximum allowable fan pressure is 15000 kPa (2175 psi).
- Stop the engine. If the pressure or fan speed are outside the specified range, go to Step 32. If the pressure and fan speed are within the specified range, go to Step 33.
- Troubleshoot the fan pump and motor for inefficiencies. Repair any problems. Recheck fan speed.
- Remove the tooling. Reconnect fan supply hose (14) to the fan valve.
- Reconnect connector (15) for the fan solenoid.
- Close the machine access covers.