VMC - Gearbox - Oil Pump - July 1995 to Present - Replacement

Applies to machines built from: 
July, 1995
AD0297 Rev B

VMC - Gearbox - Oil Pump - Replacement - Introduction

This procedure tells you how to replace the oil pump in a gearbox. Although this procedure provides instructions for multiple kits, you only need (1) kit to complete the task.

 

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.

Prerequisites

Remove the two oil port covers [1]. Use an oiler to add (2) drops of oil to each of the ports.

Put the oil port covers [1] back on the oil pump.

Use a pen or thin rod [2] to turn the fan [3] 2 full revolutions.

note: For machines that have a pressure switch connected to the oil pump with spade connectors, use the adapter cable (P/N: 93-1353). The cable is included in the kit 93-30-11626.

Machine Compatibility

Do this procedure on a vertical mill that has a gearbox.

Parts Included

KIT PN: 93-30-11626, OIL PUMP, CALM MACHINE GEARBOX. QTY: 1
KIT PN: 93-30-11656, OIL PUMP, PRE-CALM MACHINE GEARBOX. QTY: 1
[A]
30-11626
QTY: 1
GEARBOX OIL PUMP ASSY, WITH INLET SCREEN

VMC - Gearbox - Oil Pump - Replacement

Step 1

Push POWER OFF.

Set the main circuit breaker to the OFF position.

Lock the main circuit breaker. Use an approved lock with an approved safety tag.

Step 2

Remove the spindle head covers.

Remove the oil supply [1] and oil return [2] hoses. Put a plug in each hose.

note: If the hose has a threaded connection, use an open-end wrench to support the fitting on the pump. Use a second wrench to remove the hose.

Disconnect the oil pressure cable [3] and the power cable [4] from the spindle connector panel.

Step 3

Remove the pump assembly from the motor housing.

Attach the GEARBOX OIL PUMP ASSY, WITH INLET SCREEN [A] to the motor housing.

Step 4

Attach the oil supply hose [1] and the oil return hose [2].

note: If the hoses have threaded connections, do these steps to connect each fitting:
  • Tighten the fitting with your hand.
  • Put a wrench on the fitting on the pump.
  • Put a second wrench on the fitting on the hose. Turn it clockwise 1/8 to 1/4 turn.

Connect the cable [3] for the pressure sensor to the spindle connector-panel that has the label "OIL PRESSURE."

note: The illustration shows a CALM machine. For pre-CALM machines, the cable [3] for the pressure sensor has a different type of connector.

Connect the power cable [4] to the location on the spindle connector panel that has the label "OIL PUMP."

Install the spindle head covers.

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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