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BOOM AS-BRG & 3157248 - Caterpillar



3157248 BOOM AS-BRG & Caterpillar parts BOOM
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Alternative (cross code) number:
CA3157248
315-7248
3157248
Caterpillar 3157248 BOOM AS-BRG &

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Counterbalance Adjustment
The screed counterbalance system applies hydraulic pressure to the rod end of the screed lift cylinders. The screed counterbalance system does the following tasks:
While the machine is paving, the screed counterbalance system reduces the mark that is created when the operator stops the machine.
The screed counterbalance system transfers the weight of the screed to the paver in order to reduce the settling of the screed.
The screed counterbalance is used for certain mixes in order to help the screed float over the mat and maintain material thickness.
In some cases, the screed counterbalance system reduces the wear of the screed wear plates.The pressure gauge and pressure adjustment for the counterbalance system can be viewed through the monitoring system. In order to change the pressure for the counterbalance system, perform the following steps in the monitoring system.Note: The counterbalance controls that are for the AS4252C screed are only accessible through the monitoring system on the screed. Refer to Operation and Maintenance Manual, KEBU7047 for more information.
Select the control menu.
Select the configuration menu.
Illustration 1 g02103166
Use the navigation keys (1) and (2) in order to scroll to the counterbalance setting.
Press key (3) in order to select the counterbalance setting.
Use key (1) and key (2) in order to increase or decrease the pressure.In order to view the counterbalance system pressure navigate to the performance screen, then use keys (1) and (2) in order to scroll to the counterbalance value.Increase the pressure in 172 kPa (25 psi) increments in order to correct problems with the mat that are caused by the setting of the screed. Check the mat in order to determine that the desired results are being achieved after adjusting pressure of the screed counterbalance system.Note: The counterbalance setting in the configuration menu may be a few psi different than the actual reading in the performance menu.Note: If the pressure of the screed counterbalance system is increased above 1035 kPa (150 psi), the mat density may be affected. The mat density will have an open texture and the mat may require additional compaction from the compactor.Note: If the pressure of the screed counterbalance system is increased above 1035 kPa (150 psi), the automatic grade and slope controls may be affected. The higher pressure can cause the screed to not float due to the material and the higher pressure will affect the ability of the grade control to maintain the proper elevation. An indication of a high-pressure setting is a grade that does not match the joint properly. A wavy mat can also result from the pressure that has been set improperly.Counterbalance Pressure Standby
Select the control menu.
Select the configuration menu.
Illustration 2 g02103166
Use the navigation keys (1) and (2) in order to scroll to "Ct Bal Pres Stdby CMD".
Press key (3) in order to select "Ct Bal Pres Stdby CMD".
Use key (1) and key (2) in order to increase or decrease the pressure.The "Ct Bal Pres Stdby CMD" setting allows for pressure on the lift cylinders when the machine is in neutral and counterbalance system switch is


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