Vermeer McLaughlin V25, Operator And Maintenance Manual

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50-12 Operating the Vacuum Excavator V25/VX30G/VSK25/VSK30G Vacuum Excavators
Reverse Flow (Option)
Reverse flow is used to unclog hoses or remove debris from the spoil tank.
Step 1: When vacuuming, set Reverse Flow Control (1) to Vacuum position.
Step 2: If a clog occurs, close Upper Gate/Inlet valve.
Step 3: Move Reverse Flow Control to Pressure position.
Step 4: Allow system pressure to build to 5 psi (34 kPa). Pressure Relief valve will not
allow system pressure greater than 5 psi (34 kPa).
Step 5: Ensure hose is positioned in safe direction.
Step 6: Open Upper Gate/Tank Inlet valve.
Step 7: Once obstruction is relieved and air flow is reestablished, return Reverse Flow
Control to Vacuum position.
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