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. |
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. |
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. |
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. |
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. |
Machine Test Parameters | ||
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Date | Product or Component SN | |
Measurement Location | Measurement | Actual |
Minimum hydraulic oil temperature for test | |
Test Specifications | ||
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Date | Product or Component SN | |
Test | Measurements | Actual |
Pressure reducing valve setting | |
The hopper and auger lift hydraulic circuits are protected by a single relief valve. This procedure tests and adjusts the relief valve. Perform this procedure if the hopper and/or auger lift functions are not operating within acceptable parameters.
Illustration 1 | g02571852 |
Required Tools | ||||
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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 GpZero to |
|
A3 | 1 | 198-4236 | Adapter Cable As |
- Connect Tool (A2) to Tool (A3).
- Connect Tool (A3) to Tool (A1).
- Drive the machine to a smooth, horizontal surface.
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Illustration 2 g03890163 - Move propel lever (4) to the NEUTRAL position.
- Press parking brake switch (5) to change the status of the parking brake to "engaged". When the parking brake status is "engaged", an LED next to the parking brake switch will be illuminated.
- Use travel mode switch (2) to select the pave mode. When the travel mode is set to pave, an LED next to pave symbol (1) will be illuminated.
Note: The machine must be in pave mode to operate the screed lift system, hopper system, tow point system, and auger lift system.
- If necessary, press the screed raise switch (1) to lift the screed off the screed service locks.
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Illustration 3 g03890192 - If necessary, retract screed lock lever (6) on each side of the machine.
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Illustration 4 g03890194 - 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 rpm decrease switch (8) once to operate the engine in low idle.
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Illustration 5 g03890197 - Examine the display. If "Regen Conditions Not Met" warning (9) is shown and the banner is yellow, allow the engine to operate until the regeneration cycle is complete. The cycle may require up to 1 hour to complete. If the warning banner is red, use Cat® ET to complete a regeneration cycle as soon as possible. If no engine regeneration warning is shown, go to the next step.
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Illustration 6 g06037468 - Press and hold push to start switch (10). Release the switch when the engine stops.
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Illustration 7 g03890226 - Move machine power switch (11) to the OFF position.
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Illustration 8 g06004829 - Open pump compartment door (12).
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Illustration 9 g06004836 - Remove cap from pressure tap (13).
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Illustration 10 g06004843 - Connect Tool (A2) to pressure tap (14).
- Move machine power switch (11) into the ON position. After the home screen is shown on display (15) press and hold push to start switch (10). Release the switch when the engine starts.
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Illustration 12 g06004862 - Actuate screen unlock switch (16) to enable the touch screen on the display.
Note: When the display is enabled, an LED next to the screen unlock switch is illuminated.
Show/hide tableIllustration 13 g06004897 - Tap status icon (17) to enter the status screen.
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Illustration 14 g06004912 - Operate the engine at low idle for a few minutes. Press rpm increase switch (18) once to operate the engine in high idle.
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Illustration 15 g06004916 - Monitor hydraulic oil temperature (19) on display (15). Operate the machine until the oil temperature reaches a minimum of
45 ± 10 °C (113 ± 18 °F) .Show/hide tableIllustration 16 g06004918 - Press and hold auger lift switch (20). Read maximum pressure on Tool (A1). Release the switch. The pressure should be
21 000 ± 500 kPa (3050 ± 73 psi) . - Press rpm decrease switch (8) once to operate the engine in low idle.
Note: If necessary. perform a regeneration cycle before the engine is stopped.
- Press and hold push to start switch (10). Release the switch when the engine stops.
- Move machine power switch (11) to the OFF position.
- If the pressure is inside the specified range, go to the next step. If the pressure is outside the specified range, go to "Adjustment Procedure".
- Disconnect Tool (A2) from pressure tap (14).
- Replace cap (13) in pressure tap (14).
- Close pump compartment door (12).
Illustration 11 | g06004854 |
- Unlock the latches and open left rear compartment door (21).
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Illustration 18 g06004976 - Loosen locknut (23). Turn adjustment screw (22) clockwise to increase pressure. Turn the adjustment screw counterclockwise to decrease pressure.
- Hold adjustment screw (22). Tighten locknut (23).
- Close left rear compartment door (21), and secure the door with the latches.
- Perform the test procedure.
Illustration 17 | g06004938 |