HPC-300 / TSC-300 - Pump Filter - Maintenance

Applies to machines built from: 
November, 2013

HPC, TSC - 300 PSI - Pump Filter - Maintenance

Excessive debris in the High-Pressure Coolant (HPC) or Through-Spindle Coolant (TSC) pump filter is a likely cause of low coolant flow through the cutting tool. This document tells you how to clean the filter on the standard HPC/TSC pump, and the auto-clean HPC/TSC pump.

For machines made before March, 2015, use the left column. For machines made after March, 2015, use the right column.

Push EMERGENCY STOP when you work on the machine.
Disconnect the HPC/TSC pump power cable from the electrical cabinet. Remove the HPC/TSC pump assembly from the coolant tank.


Remove the filter retaining ring [2] and filter screen [3] from the bottom of the HPC/TSC pump assembly [1]. Clean the filter screen [3] with warm soapy water and a soft brush. Auto-clean HPC/TSC pumps have a plunger [4] that activates to remove debris from the filter [7]. When the auto-clean pump cannot remove all of the debris, an icon [5] ("HPC Filter" for lathes) appears on the control pendant display to indicate that the filter needs maintenance.

Remove the filter tray from the bottom of the HPC/TSC assembly. Remove the tray lid [6] from the filter [7]. Use a brush to clean the filter [7].


Clean the coolant tank after you clean the HPC/TSC pump filter. It is likely that contamination in the coolant caused this filter clog.

Install the parts in the opposite order they were removed.

Be aware: Many service and repair procedures should be done only by authorized personnel. The service technicians at your Haas Factory Outlet (HFO) have the training, experience, and are certified to do these tasks safely and correctly. You should not do machine repair or service procedures unless you are qualified and knowledgeable about the processes.

Danger: Some service procedures can be dangerous or life-threatening. DO NOT attempt a procedure that you do not completely understand. Contact your Haas Factory Outlet (HFO) and schedule a service technician visit if you have any doubts about doing a procedure.