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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 can result from rotating and moving parts. Stay clear of all rotating and moving parts. Never attempt adjustments while the machine is moving or the engine is running unless otherwise specified. The machine must be parked on a level surface and the engine stopped. Attach a "Do Not Operate" or similar warning tag to the start switch and controls before servicing, repairing, or making adjustments to the machine. |
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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. |
| Machine Test Parameters | ||
|---|---|---|
| Date | Product or Component SN | |
| Measurement Location | Measurement | Actual |
| Engine High Idle Test Speed | 2200 rpm | |
| Hydraulic oil temperature for test | |
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| Illustration 1 | g03428127 |
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| Illustration 2 | g03428245 |
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View of front of pump. | |
| Test Specifications | ||
|---|---|---|
| Date | Product or Component SN | |
| Location | Specification | Actual |
| Hydraulic pressure at port "G" (12) on right grade and slope valve (13). | |
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| Torque for set screw (17) on "PC" adjustment screw (18) in pump control valve (16). | |
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This procedure will test the performance of the control valve for the auxiliary pump. If the control valve is out of specification, this procedure will outline the steps to adjust the control valve hydraulic pressure.
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| Illustration 3 | g02571852 |
| Required Tools | ||||
|---|---|---|---|---|
| Tool | Item | Qty | Part No | Description |
| A | 198-4240 | Digital Pressure Indicator Gp | ||
| A1 | 1 | 198-4234 | Digital Indicator | |
| A2 | 1 | 198-4238 | Pressure Sensor Gp
(0 to 35000 kPa (0 to 5000 psi)) |
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| A3 | 1 | 198-4236 | Adapter Cable As | |
- Connect Tool (A2) to Tool (A3).
- Connect Tool (A3) to Tool (A1).
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Table 4 Optional Tools(1) Tool Item Qty Part No Description B B1 1 8T-0860 Pressure Gauge B2 1 6V-4144 Quick Connect Coupler C C1 1 177-7860 Hose As C2 1 6V-4142 Fitting C3 1 6V-4143 Quick Connect Coupler Show/hide table(1) The optional tools can be used to replace the digital pressure gauges in the required tool list. - Connect one Tool (B2) to each Tool (B1).
- Connect each Tool (C3) to each Tool (C1). Connect each Tool (C2) to each Tool (C1).
- Connect each Tool (C3) to each Tool (B2).
- Drive the machine to a smooth, horizontal surface.
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Illustration 4 g03667723 - Move propel lever (4) to the NEUTRAL position.
- Press parking brake switch (5) in order to change the status of the parking brake to "engaged". When the parking brake status is "engaged", LED (2) next to the parking brake switch will be illuminated.
- Use travel mode switch (3) to select the PAVE mode. When the travel mode switch is set to PAVE mode, an LED next to PAVE symbol (1) will be illuminated.
Note: The machine must be in PAVE mode in order to operate the screed lift system, hopper system, apron system and auger lift system.
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Illustration 5 g03667821 - Use screed float switch (7) to place the screed in the FLOAT position. When the screed is in the FLOAT position, an LED next to the screed float switch will illuminate. Allow the screed to lower to the ground.
- Press the down arrow on throttle control switch (8) once in order to operate the engine in low idle.
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Illustration 6 g03654811 - Shut off the engine. Either place machine power switch (9) in the OFF position or press and hold push to start switch (6) for 3 seconds. An LED next to the push to start switch will flash when the engine is in shutdown mode.
Note: The engine may run for several minutes when placed in the shutdown mode.
- If the engine was shut down using the push to start switch (6), move machine power switch (9) to the OFF position.
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Illustration 7 g03661979 - Unhook latch (10) and open access panel (11) on the right side of the machine.
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Illustration 8 g03428127 - Remove cap from port "G" tap (12) on right grade and slope valve (13). Install Tool (A2) on tap (12).
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Illustration 9 g03428171 - Use screed halt switch (14) to place the screed in the LOCK position.
Note: If the machine is configured with 10 m package, lower the auxiliary pressure to
- Move machine power switch (9) to the ON position.
- Press push to start switch (6) for 2 seconds in order to start the engine. An LED next to the push to start switch will flash when the engine is in start mode. When the engine has started, the LED will remain illuminated.
Note: Only one attempt to start the engine is allowed per key cycle. A new key cycle will need to be done in order to restart the process.
- Operate the engine at low idle for a few minutes.
- Press the up arrow on throttle control switch (8) in order to place the engine in high idle. The engine speed should increase to 2200 rpm.
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Illustration 10 g03668529 - Monitor the hydraulic oil temperature on operator display (15). Operate the machine until the oil temperature reaches
43 ± 5.6 °C (110 ± 10 °F) . - Read pressure on Tool (A). The pressure at port "G" should be
14000 ± 175 kPa (2030 ± 25 psi) . - Press the down arrow on throttle control switch (8) in order to place the engine in low idle.
- Shut off the engine. Either place machine power switch (9) in the OFF position or press and hold push to start switch (6) for 3 seconds. An LED next to the push to start switch will flash when the engine is in shutdown mode.
Note: The engine may run for several minutes when placed in the shutdown mode.
- If the engine was shut down using the push to start switch (6), move machine power switch (9) to the OFF position.
- If the pressure is within the specified range, go to Step 11. If the pressure is outside the specified range, go to "Adjustment Procedure".
- Remove the tooling. Close access door (11) and secure latch (10).
- Use a 4 mm hex wrench in order to loosen set screw (17) for "PC" adjustment screw (18) in pump control valve (16).
- Use a 6 mm hex wrench in order to manipulate the "PC" adjustment screw (18). Rotate the adjustment screw clockwise in order to increase the pressure. Rotate the adjustment screw counterclockwise in order to decrease the pressure. The pressure should be
14000 ± 175 kPa (2030 ± 25 psi) .Note: One revolution of adjustment screw (18) changes the pressure by approximately
4200 ± 350 kPa (610 ± 50 psi) . - Hold adjustment screw (18) in place. Tighten set screw (17) to a torque
9.15 ± 1.65 N·m (6.75 ± 1.2 lb ft) . Go back to "Test Procedure" Step 1.
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| Illustration 11 | g03428195 |
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View of rear of pump. | |
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| Illustration 12 | g03428245 |
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View of front of pump. | |