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Diesel engine exhaust contains products of combustion which may cause personal injury. 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 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 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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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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To prevent injury or death, never work under a machine while a test is being performed. |
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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 | |||
|---|---|---|---|
| Tool | Part Number | Description | Qty |
| A | 8C-6874 | Connector | 2 |
| 6V-9746 | O-Ring Seal | 2 | |
| B | 4C-8689 | Flow Meter Gp 1.9-18.9 L/min (0.5-5.0 US gpm) |
1 |
| C | 6V-8941 | Reducer | 2 |
| 6V-8397 | O-Ring Seal | 2 | |
| D | 6v-8556 | Nut | 2 |
| E | 124-2114 | Coupling | 4 |
| 6V-8397 | O-Ring Seal | 4 | |
| F | 122-6889 | Hydraulic Hose | 2 |
| G | 5P-3413 | Pipe Sealant | 1 |
| H | 148-8336 | Connector As | 1 |
| J | 8T-6663 | Port Adapter | 1 |
| 6V-8397 | O-Ring Seal | 1 | |
| K | 348-5430 | Multi-Tool Gp | 1 |
| L | 6V-9828 | Cap As | 4 |
| M | .6V-9507 | Plug | 4 |
| 4J-5477 | O-Ring Seal | 4 | |
Note: In order to perform this test and adjust, the brakes must be disconnected or the machine must be placed on jack stands.
Note: The machine is equipped with two propel motors. The propel motors are similar. The following procedure illustrates the test on the rear propel motor. The same procedure can be used to test the front propel motor.
- Drive the machine to a smooth, horizontal surface.
- Move propel lever (1) to the NEUTRAL position.
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| Illustration 1 | g03257316 |
- Move parking brake switch (2) to the ON position.
- Use throttle control switch (3) in order 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.
- Apply Tool (G) on the NPT side of each Tool (A). Install one Tool (A) in each side of Tool (B) .
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| Illustration 2 | g03257318 |
- Assemble Tool (C) and Tool (D). Connect one Tool (D) to each Tool (A) on Tool (B) .
- Assemble Tool (E) and Tool (F). Make two sets of this tool assembly. Connect Tool (E) from one of tool assemblies to Tool (C) on each side of the flowmeter.
- Disconnect brake supply hose assembly (5) at the two propel motors. Use Tool (L) to cap the brake inlet port in the propel motors. Use Tool (M) to plug the brake supply hose assembly.
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| Illustration 3 | g03257336 |
- Loosen clamp (7). Remove hose (6) from adapter (8). Remove adapter (8) from adapter (9). Leave adapter (9) in the propel motor.
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| Illustration 4 | g03257338 |
- Reconnect hose (6) to adapter (8). Tighten clamp (7) on the hose and the adapter.
- Install Tool (H) in adapter (9) .
- Install Tool (E) from inlet side of Tool (B) onto Tool (H) .
- Install Tool (J) onto adapter (8) .
- Install Tool (E) from outlet side of Tool (B) onto Tool (J) .
- 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. Depress throttle control switch (3) and hold the switch for approximately 2 seconds in order to operate the engine at high idle.
Note: When the engine is at high idle, "High Idle" will appear on display, and all three LEDs next to throttle control switch (3) will be illuminated.
- Monitor the hydraulic oil temperature with Tool (K). Operate the machine until the oil temperature reaches 43 ± 5.6 °C (110 ± 10 °F).
- Move parking brake switch (2) to the OFF position.
- Use speed control switches (10) in order to set the propel speed to 50 percent.
Note: Two things indicate when the propel speed is set to 50 percent. First, "Speed Control % 50" will appear on the display. Second, four LEDs next to speed control switches (10) will be illuminated.
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| Illustration 5 | g03257340 |
- Modulate propel lever (1) forward until flow is registered. (approximately one half of the total travel). Read flow on Tool (B). The flow should be 3.5–10.0 L/min (0.9–2.6 US gpm).
Note: Motor case drain flow cannot be adjusted. If the case drain flow is greater than 10.0 L/min (2.6 US gpm), determine the source of excess leakage and repair. If the flow is less than 3.5 L/min (0.9 US gpm), inspect the flushing valve and orifices.
- Modulate propel lever (1) in reverse until flow is registered. (approximately one half of the total travel). Read flow on Tool (B). The flow should be 3.0–9.0 L/min (0.8–2.4 US gpm).
Note: Motor case drain flow cannot be adjusted. If the case drain flow is greater than 9.0 L/min (2.4 US gpm), determine the source of excess leakage and repair. If the flow is less than 3.0 L/min (0.8 US gpm), inspect the flushing valve and orifices.
- Move propel lever (1) to the NEUTRAL position.
- Move parking brake switch (2) to the ON position.
- Use throttle control switch (3) in order 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.
- Perform Step 10 through Step 15 in reverse order to remove the tooling, and reconnect the case drain line to the propel motor.
- If necessary, repeat this test for the other propel motor.
- Remove Tool (M) from brake supply hose assembly (5) at both drum propel motors. Remove Tool (L) from the brake inlet port in both drum propel motors. Connect brake supply hose (5) to the brake inlet ports on the propel motors.