HPC-300 / TSC-300 — Universal Coolant Pump Head/Motor - Replacement

Applies to machines built from: 
January, 1989
AD0235 Rev D

HPC, TSC - 300 PSI - Coolant Pump Head/Motor - Introduction

This procedure tells you how to replace a 300 psi HPC, TSC pump head or HPC, TSC motor in each of these systems:
  • High-Pressure Coolant (HPC) - Lathe
  • Through-Spindle Coolant (TSC) - Mill

This illustration shows each coolant pump type that is in this procedure:

  • lid-mounted HPC, TSC pump assembly [1]
  • HPC, TSC pump with stand assembly [2]
  • HPC, TSC Auto-Clean pump with stand assembly [3]

Safety Notes
Caution: When you do maintenance or repair on CNC machines and their components, you must always follow basic safety precautions. This decreases the risk of injury and mechanical damage.

Do these steps before you do work in the machine or in the control cabinet:
  • Set the main circuit breaker to the OFF position.
  • Use an approved lock with an approved safety tag. Always follow lock-out procedures in accordance to local government rules.
  • After turning off the machine, wait at least 5 minutes before working in the control cabinet, to allow power to dissipate. Wait for the voltage indicator LED on the vector drive to go off completely.
  • Always turn off the main air supply when you work on any part of the pneumatic system.
  • Make sure to rest the spindle head on a block of wood when work is done on a vertical axis. This will prevent any unintended movement that could result in the axis falling.
  • Never alter any safety circuits on the machine.
You should not do machine repair or service procedures unless you are qualified and knowledgeable about the processes. Serious damage to the machine components can result in costly repairs. The service technicians at your Haas Factory Outlet (HFO) have the training and experience, and are certified to do these tasks safely and correctly. The repair and service work performed by your HFO is protected with a limited warranty.
danger: Some service procedures can be dangerous or life-threatening. DO NOT attempt a procedure that you do not fully understand. If you have any doubts about doing a procedure contact your Haas Factory Outlet (HFO) and schedule a service visit.

Parts Included

[A]
93-1525
QTY: 1 (OPTIONAL)
PUMP, HPC/TSC-300
[B]
93-2379
QTY: 1 (OPTIONAL)
MOTOR, HPC/TSC-300 1.5 HP 3-PH, TWIST LOCK CONNECTOR 4.75 FT
[C]
76-2214
QTY: 3 (WITH 93-2379)
CRIMP WIRE NUT 22-14 NYLON

Tools Required

Crimp Plier/Wire Stripper

HPC, TSC - 300 PSI - Coolant Pump Head/Motor - Replacement

Step 1

Disconnect the power cable for the motor. Remove the pump assembly from the coolant tank to let the coolant drain.

Do this step if you must replace the motor and the cable, or if the new cable is not compatible with the machine:

Remove the cable [1] from the old motor.

Remove the (2) screws [3] and cover [2] from the new HPC, TSC MOTOR [B].

Remove the cable from the new HPC, TSC MOTOR [B].

Install the cable [1] from the old motor to the new HPC, TSC MOTOR [B].

Connect the old cable to the motor. Use the (3) CRIMP WIRE NUTS [C]. Use crimp pliers and wire strippers to correctly connect the cable.

Step 2

Do this step to replace a pump head or motor that is lid-mounted.

Remove these parts:

  • (4) socket head cap screws [2] and the motor [1]
  • If you only need to replace the motor [1], replace it now. If no other parts need to be replaced, the procedure is complete.
  • coupler [3] and (4) socket head cap screws [4]
  • (2) compression fittings [5] and pump head assembly [6]
  • (2) steel tube assemblies [7]

Install the new HPC, TSC PUMP HEAD [A] and the new HPC, TSC MOTOR [B] in the opposite sequence that they were removed.

Step 3

Do this step to replace a pump head or motor that has a stand.

Remove these parts:

  • (4) socket head cap screws [2] and the motor [1]
  • If you only need to replace the motor [1], replace it now. If no other parts need to be replaced, the procedure is complete.
  • (4) button head cap screws [8] and the filter housing [9]
  • coupler [3] and (4) socket head cap screws [4]
  • (2) compression fittings [5] and pump head assembly [6]
  • (2) steel tube assemblies [7]

Install the new HPC, TSC PUMP HEAD [A] and the new HPC, TSC MOTOR [B] in the opposite sequence that they were removed.

Step 4

Do steps 4 and 5 to replace a pump head or motor on a system that has the auto-clean filter.

Remove these parts:

  • (2) button head cap screws [2] and (2) pump stand covers [1]
  • air cylinder [5] (Turn counterclockwise to remove.)
  • intake tube assembly [7], vacuum switch assembly [8], and brass fitting [9]
  • steel fitting [10], (4) button head cap screws [11], and intake filter assembly [12]
  • (4) socket head cap screws [4], coupler [3], and pump head assembly [6]

Step 5

Remove these parts:
  • (2) 90 degree tubes [3]
  • If you only need to replace the pump head, replace it now. If no other parts need to be replaced, install the parts in the opposite sequence that they were removed. The procedure is complete.
  • (4) socket head cap screws [2]
  • motor [1]

Install the new HPC, TSC MOTOR [B] in the opposite sequence that it was removed.

Install the coolant pump assembly. Test for leaks and correct pressure.

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.

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