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Engine exhaust contains products of combustion which may be harmful to your health. Always start and operate the engine in a well ventilated area and, if in an enclosed area, vent the exhaust to the outside. |
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Personal injury can result from rotating and moving parts. Stay clear of all rotating and moving parts. Never attempt adjustments while the engine is running unless otherwise specified. |
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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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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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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 | |||
|---|---|---|---|
| Tools | Part No | Description | Qty |
| A(1) | 198-4234 | Digital Indicator | 1 |
| B(1) | 198-4236 | Adapter Cable As | 2 |
| C(1) | 198-4239 | Pressure Sensor Gp (0-41 340 kPa) (0-6000 psi) | 2 |
| D | 6V-9828 | Cap As | 1 |
| E | 6V-9507 | Plug | 1 |
| 4J-5477 | O-Ring Seal | 1 | |
| F | 251-0030 | Infrared Thermometer | 1 |
| (1) | Tool (A) , Tool (B), and Tool (C) are part of the 198-4240 Digital Pressure Indicator Gp. |
- Drive the machine to a test area with a smooth, horizontal surface. The test area should have a hard or firm surface.
Note: A firm surface is important for accurate test results on a pad foot drum machine. The test surface should not allow pad penetration.
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Illustration 1 g06108868 - Move propel lever (1) to the NEUTRAL position.
- Move parking brake switch (2) to the ON position.
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Illustration 2 g06108976 - Use throttle control switch (3) to operate the engine in ECO mode or in low idle.
Note: Two things indicate when the engine is in ECO mode. First, "ECO" will appear on the display. Second, the second LED next to throttle control switch (3) will be illuminated. Two things indicate when the engine is at low idle. First, "Low Idle" will appear on the display. Second, the first LED next to the throttle control switch will be illuminated.
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Illustration 3 g06108978 - Move engine start switch (4) to the OFF position.
- Assemble the tooling. Connect Tool (C) to Tool (B). Connect Tool (B) to Tool (A).
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Illustration 4 g06113456 - Place one Tool (C) to forward pressure tap (6) in port "DF" of the test block. Place one Tool (C) to forward pressure tap (5) in port "AF" of the test block.
- Move engine start switch (4) to the START position. Release the switch when the engine starts.
- Operate the engine at low idle for a few minutes. Use throttle control switch (2) to operate the engine in high idle.
Note: Two things indicate when the engine is at high idle. First, "High Idle" will appear on the display. Second, the third LED next to throttle control switch (3) will be illuminated.
- Monitor the hydraulic oil temperature with Tool (F). Operate the machine until the oil temperature reaches
49 ± 6 °C (120 ± 10 °F) .Show/hide table
Illustration 5 g06113357 - Use propel mode switch (7) to shift the propel motors into the LOW SPEED position.
Note: Two things indicate when the propel motors are in the LOW SPEED position. First, "Propel Mode Low" will appear on the display. Second, one LED next to propel mode switch (7) will be illuminated.
- Use speed switches (8) to set the propel speed to 100 percent.
Note: Two things indicate when the propel speed is set to 100 percent. First, "Speed Control % 100" will appear on the display. Second, seven LEDs next to increase speed switches (8) will be illuminated.
- Move parking brake switch (2) to the OFF position.
- Move propel lever (1) to the FULL FORWARD position.
- Record pressure on Tool (A).
- Move propel lever (1) to the NEUTRAL position.
- Move parking brake switch (2) to the ON position.
- Use propel mode switch (7) to shift the propel motors into the HIGH SPEED position.
Note: Two things indicate when the propel motors are in the HIGH SPEED position. First, "Propel Mode High" will appear on the display. Second, two LEDs next to propel mode switch (7) will be illuminated.
- Move parking brake switch (2) to the OFF position.
- Move propel control lever (1) to the FULL FORWARD position.
- Use Tool (A) to record the pressure differential between port "AF" and port "DF".
- Move propel control lever (1) to the NEUTRAL position.
- Use throttle control switch (3) to operate the engine in ECO mode or in low idle.
Note: Two things indicate when the engine is in ECO mode. First, "ECO" will appear on the display. Second, the second LED next to throttle control switch (3) will be illuminated. Two things indicate when the engine is at low idle. First, "Low Idle" will appear on the display. Second, the first LED next to the throttle control switch will be illuminated.
- Move parking brake switch (2) to the ON position.
- Move engine start switch (4) to the OFF position.
- Remove one Tool (C) from forward pressure tap (6) in port "DF" of the test block. Remove one Tool (C) from forward pressure tap (5) in port "AF" of the test block.
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Illustration 6 g06113462 - Place one Tool (C) to reverse pressure tap (9) in port "DR" of the test block. Place one Tool (C) to reverse pressure tap (10) in port "AR" of the test block.
- Move engine start switch (4) to the START position. Release the switch when the engine starts.
- Operate the engine at low idle for a few minutes. Use throttle control switch (3) to operate the engine in high idle.
Note: Two things indicate when the engine is at high idle. First, "High Idle" will appear on display. Second, the third LED next to throttle control switch (3) will be illuminated.
- Monitor the hydraulic oil temperature with Tool (F). Operate the machine until the oil temperature reaches
49 ± 6 °C (120 ± 10 °F) . - Use propel mode switch (7) to shift the propel motors into the LOW SPEED position.
Note: Two things indicate when the propel motors are in the LOW SPEED position. First, "Propel Mode Low" will appear on the display. Second, one LED next to propel mode switch (7) will be illuminated.
- Move parking brake switch (2) to the OFF position.
- Move propel control lever (1) to the FULL REVERSE position.
- Use Tool (A) to record the pressure differential between port "AR" and port "DR".
- Move propel lever (1) to the NEUTRAL position.
- Move parking brake switch (2) to the ON position.
- Use propel mode switch (7) to shift the propel motors into the HIGH SPEED position.
Note: Two things indicate when the propel motors are in the HIGH SPEED position. First, "Propel Mode High" will appear on display. Second, two LEDs next to propel mode switch (7) will be illuminated.
- Move parking brake switch (2) to the OFF position.
- Move propel lever (1) to the FULL REVERSE position.
- Use Tool (A) to record the differential pressure between port "AR" and port "DR".
- Move propel lever (1) to the NEUTRAL position.
- Move parking brake switch (2) to the ON position.
- Use throttle control switch (3) to operate the engine in ECO mode or in low idle.
Note: Two things indicate when the engine is in ECO mode. First, "ECO" will appear on the display. Second, the second LED next to throttle control switch (3) will be illuminated. Two things indicate when the engine is at low idle. First, "Low Idle" will appear on the display. Second, the first LED next to the throttle control switch will be illuminated.
- Move engine start switch (4) to the OFF position.
- Remove the tooling from forward pressure tap (9) in port "DR" and forward pressure tap (10) in port "AR" of the test block.
- Compare the recorded differences in hydraulic pressure between the axle and the drum in the previous tests.
- If, the pressure differential between the drum and axle in any of the previous tests is greater than
2070 kPa (300 psi) , calibrate propel current. Refer to Systems Operation Testing and Adjusting, Propel Current - Calibrate.Note: If the current calibration procedure does not resolve the pump synchronization problem, adjust the pump neutral settings. Refer to Systems Operation Testing and Adjusting, Piston Pump Neutral - Test and Adjust.
