Service High Pressure Flood Coolant (HPFC) - Troubleshooting Guide - NGC
Last updated: 12/09/2020

High Pressure Flood Coolant (HPFC) - Troubleshooting Guide - NGC

Introduction

The HPFC is an option that replaces the standard coolant. The HPFC can be paired with TSC and TSC ready machines, but cannot be paired with a VFD. 

Symptoms Table

Symptom Possible Cause Corrective Action
The O-ring in the filter casting is pushed out causing coolant to leak or spray out of the top cover The filter cover was not replaced when installing/upgrading to HPFC Replace the filter cover follow the Filter Cover Replacement section
Excessive noise from the HPFC coolant pump. The coolant nozzles valves are closed. Makes sure all the coolant nozzle valves are open.
Low coolant flow, the pump cavitates (cavitation sounds like heavy grit in the pump head, or a suction sound) or is otherwise noisy.
 The pick-up hose can kink when the pump is running.  Replace the pick-up hose with the new version with a spring.
Pressure loss is observed The pressure relief set screw may have fallen out Reinstall the set screw adding blue Loctite on it as well. See Pressure relief adjustment section on how to properly replace the set screw.

Filter Cover Replacement

If the O-ring [1] was pushed out of position replace the original filter cover [2] with the new thick filter cover [3]. IF the O-ring is damaged replace the O-ring.

Kinked Pick-up hose

The pick-up hose can kink when the pump is running. Replace the pick-up hose with the new version with a spring.

Pressure Relief Adjustment

1. Installl the fittings in the configuration shown they should go in between the pump to the filter
 
2. With the pump running close the valve on the hose assembly and observe the pressure on the valve
 
3. Remove the pump from the tank and adjust the set screw to adjust the pressure, the pressure range is from 125-175 PSI
 

NOTE: Tightening the screw will increase pressure, loosening will decrease pressure.

IMPORTANT: Make sure to add blue Loctite to the set screw

Parts List:

58-1829 GAUGE 0-600PSI/BAR X NPT-1/4-M BACK (x1)

58-3084 FITG NPT3/8F NPT3/8F NPT1/4F TEE BRASS (x1)

58-3644 NIPPLE 3/8 NPT X 2 1/2 BRASS (x2)

58-3625 FITG REDUCER NPT1/2M NPT3/8F BRASS (x1)

58-1837 BALL VALVE BRASS NPT-1/2F X NPT-1/2M (x1)

58-0296 COUPLING STR 1/2F - 1/2F MCMASTER #4464K (x1)

58-36680 FITG GARDEN 3/4 M X 1/2 MNPT BR STR (x1)

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