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Conveyor chain replacement .......................................5
BI016907-02-EN
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Gathering head raise
Check the directional control valve for proper operation.
Check to see that piping has not been crossed, especially if the problem occurs after maintenance or repair work.
Check pressure at the LH pressure gauge on scrubber.
Check to see that there is no mechanical bind.
Check cylinders for bypassing.
Check accumulator for 500 psi pre-charge, and that the bladder is functioning properly, depending on system installed.
Check needle valve on pilot circuit to verify that it is not open or leaking off.
Check in-line counterbalance valve for proper operation or blockage.
Gathering head float
Check the control valve for proper operation.
Check to see that hosing has not been crossed, especially if the problem occurs after maintenance or repair work.
Check to see that there is no mechanical bind.
Check accumulator for 500 psi pre-charge, and that the bladder is functioning properly, depending on system installed.
Check cylinders for bypassing (they will leak out the top).
Check needle valve on pilot circuit to verify that it is not open or leaking off.
Check counterbalance valve for proper operation (See the schematic in the parts book supplied with your machine for the proper setting).
Conveyor raise
Check the directional control valve for proper operation.
Check to see that hosing has not been crossed, especially if the problem occurs after maintenance or repair work.
Be sure that the built-in atmospheric-vented reliefs on the cylinders are not dumping oil.
Check to see that there is no mechanical bind.
Verify that cylinders are not bypassing.
