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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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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 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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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 | 8T-0861 | Pressure Gauge
|
2 |
| B | 171-1879 | Fitting Adapter | 2 |
| C | 187-3547 | Fitting | 2 |
| D | 187-3546 | Quick Disconnect Coupler | 4 |
| E | 177-7863 | Hose As | 2 |
| F | 8T-0855 | Pressure Gauge
|
1 |
| 6V-4144 | Quick Connect Coupler | 1 | |
| G | 177-7860 | Hose As | 1 |
| 6V-4142 | Fitting | 1 | |
| 6V-4143 | Quick Connect Coupler | 1 | |
- Drive the machine to a smooth, horizontal surface.
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Illustration 1 g01391346 - Move propulsion lever (4) to the NEUTRAL position.
- Rotate speed dial (2) to the MINIMUM position.
- Move parking brake switch (1) to the ON position.
- Move travel mode switch (3) to the TRAVEL position.
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Illustration 2 g01358468 - Move screed lift switch (5) to the RAISE position. Completely lift the screed.
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Illustration 3 g01359192 - Engage screed lock mechanism (6) on both sides of the machine.
- Move screed lift switch (5) to the FLOAT position. Allow the tow arms to rest on screed locks (6a).
Note: The screed lift switch on the inactive operator station must also be in the FLOAT position in order to lower the screed.
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Illustration 4 g01359295 - Move hopper switch (7) to the RAISE position. Release the switch when the hopper cylinders are completely extended.
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Illustration 5 g01359296 - Engage hopper lock pin (8) on both sides of the machine.
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Illustration 6 g01359299 - Move throttle control switch (9) to the LOW IDLE position. Hold the switch in this position for less than 1 second.
- After the engine reaches low idle, move engine start switch (10) to the OFF position.
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Illustration 7 g01359301 - Lift center deck plate (11).
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Illustration 8 g01359302 - Install prop rod (12).
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Illustration 9 g01359304 - Loosen three screws (13). Remove cover plate (14).
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Illustration 10 g01359318 - Remove retaining nut (15) on the coil of parking brake solenoid (16). Remove the coil of the parking brake solenoid from the valve stem.
Note: The parking brake solenoid can be identified as having wire 374-PK(Pink) and 200-BK(Black) wires on the connector.
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Illustration 11 g01391497 - Open pump compartment (17), which is on the right side of the machine.
- Assemble two sets of Tool (A) through Tool (E).
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Illustration 12 g01391502 - Connect one high pressure gauge (Tool (A)) to port "M1" (18) on the left propulsion pump.
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Illustration 13 g01359329 - Connect the second high pressure gauge (Tool (A)) to port "M2" (19) on the left propulsion pump.
- Assemble Tool (F).
- Assemble Tool (G).
- Connect Tool (F) to Tool (G).
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Illustration 14 g01391505 - Remove the cap from charge pressure tap (20) on the right material feed pump. Connect Tool (G) to the charge pressure tap.
Note: The switch for the screed lift must be reset to the HOLD position before the machine will start.
- Move engine start switch (10) to the START position. Release the engine start switch when the engine starts.
- Operate the engine at low idle for a few minutes.
- Move throttle control switch (9) to the HIGH IDLE position. Hold the switch in this position for less than 1 second. The engine speed should increase to 2200 rpm.
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Illustration 15 g01359349 - Monitor the hydraulic oil temperature on the operator display. Operate the machine until the oil temperature reaches
43 ± 5.6 °C (110 ± 10 °F) .Show/hide tablePersonal 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.
Note: The travel mode switch must be in the TRAVEL position during this test. If the travel mode switch is in the PAVE position, the machine may drive through the parking brake.
Note: If the machine moves at any time during this test, immediately move the speed dial back to the MINIMUM position. Stop the machine and repair the parking brakes before this test is continued and/or before the machine resumes service.
- Move parking brake switch (1) to the OFF position.
Note: The parking brake switch on the inactive operator station must also be in the OFF position.
- Rotate speed dial (2) to 50 percent of the MAXIMUM position.
- Move propulsion lever (4) to the FULL FORWARD position.
- Record the pressure at port "M1" (18).
- Record pressure at charge pressure tap (20).
- Subtract the pressure that was recorded in Step 33 from the pressure that was recorded in Step 32. The pressure differential should be
41990 ± 1380 kPa (6090 ± 200 psi) . - Move propulsion lever (4) back to the NEUTRAL position.
- Move propulsion lever (4) to the full REVERSE position.
- Record the pressure at port "M2" (19).
- Subtract the pressure that was recorded in Step 33 from the pressure that was recorded in Step 37. The pressure differential should be
41990 ± 1380 kPa (6090 ± 200 psi) . - Move propulsion lever (4) to the NEUTRAL position.
- Rotate speed dial (2) back to the MINIMUM position.
- Move parking brake switch (1) to the ON position.
- Move throttle control switch (9) to the LOW IDLE position. Hold the switch in this position for less than 1 second.
- After the engine reaches low idle, move engine start switch (10) to the OFF position.
- If the forward pressure is outside the specified range, go to Step 45. If the forward pressure is inside the specified range, go to Step 47.
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Illustration 16 g01391508 - Loosen the locknut on forward multifunction valve (21). In order to increase pressure, rotate the adjustment screw of the multifunction valve clockwise. In order to decrease pressure, rotate the adjustment screw counterclockwise.
Note: One revolution of the adjustment screw changes the pressure by approximately
9300 kPa (1350 psi) . - Hold the adjustment screw, and tighten the locknut on forward multifunction valve (21) to
20 N·m (15 lb ft) . - If the reverse pressure is outside the specified range, go to Step 48. If the reverse pressure is inside the specified range, go to Step 50.
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Illustration 17 g01391509 - Loosen the locknut on reverse multifunction valve (22). In order to increase pressure, rotate the adjustment screw of the multifunction valve clockwise. In order to decrease pressure, rotate the adjustment screw counterclockwise.
Note: One revolution of the adjustment screw changes the pressure by approximately
9300 kPa (1350 psi) . - Hold the adjustment screw, and tighten the locknut on reverse multifunction valve (22) to
20 N·m (15 lb ft) . - If an adjustment was made, go to Step 25. If no adjustment was made, go to Step 51.
- Remove tooling. Close pump compartment (17).
- Reinstall the coil of parking brake solenoid (16). Tighten retaining nut (15) to a torque of
7 N·m (5 lb ft) . - Install cover plate (14), and install three screws (13).
- Close center deck plate (11).
