Spindle Minimum Lubrication System - Troubleshooting Guide

Introduction

Spindle Troubleshooting Video

The following service video shows how to troubleshoot the spindle lubrication system.

NOTE: This service video is for reference only and does not replace the written procedure.

Symptom Table

Symptom	Possible Cause	Corrective Action
Low Lube Icon	The Low Spindle Lube Oil Level sensor input was 1 more that 75% of the time when the Spindle Lube pump was On.	Make sure the reservoir has enough oil. Inspect the Oil level sensor on the tank. Go to DIAGNOSTIC>I/O tab. Search for Input 49 LOW_SPINDLE _LUBE_OIL_LEVEL, make sure the bit toggles when the oil level sensor is tripped.
Alarm 805 LOW SPINDLE LUBRICATION.	The reservoir oil level is low.	Refill the reservoir.
Alarm 805 LOW SPINDLE LUBRICATION.	The oil level sensor is faulty.	Test the oil level sensor.
Hot, Noisy, or Failed Spindle	The reservoir is filled with the incorrect oil type.	Refill the reservoir.
	There are leaks in the fittings.	Inspect the fittings for leaks.
	The lubrication tube is damaged.	Inspect the lubrication tube for damage.
	A solenoid is not functioning.	Test the air and lubrication solenoids.
	Incorrect oil flow.	Perform an oil collection test.
When testing the spindle lubrication, there are inconsistent drops or no drops.	There is a leak in the oil pump fittings.	Inspect all the fittings for leaks. Refer to the leaks section below.
	The pump has not been primed.	Ensure that the lubrication pump has been fully primed. There should not be any air on the line that feeds the sightglass with oil.

Oil Level

Corrective Action:

Refill the oil reservoir with Mobil SHC 625. If Mobil SHC 625 is not available, use Mobil 1 5W-20 or Mobil 1 10W-30.

Refer to the lubricant tables.

Sensor

Corrective Action:

Make sure the oil float [1] moves freely.

Go to Proximity Sensor - Troubleshooting Guide to troubleshoot the proximity sensor [2].

Leaks

Corrective Action:

Examine the fittings [1,2] on top of the oil pump tank. The oil collects on top of the oil pump tank [3] either behind or in front of the sight glass bracket, underneath the leaking fitting. Fully seat the hose(s) into the fitting(s). Check the end of the hoses to make sure they are cleanly cut. Tighten or replace any leaking fittings.

Note: Do not disconnect the oil filled hoses unless there are still leaks after re-seating the hoses into the fittings as this can introduce air in hoses which will need to be purged before checking for correct pump operation.

Lubrication Tube

Corrective Action:

Examine the lubrication tube between the lube panel and the spindle for kinks, splits, or pinches.

Make sure you can see oil droplets in the tube.

Replace the tube if it is damaged.

Voltage

Corrective Action:

Use a multimeter or voltage detector to measure voltage at the solenoid connector while you do the Spindle Lubrication Test:

Next Generation Control: Press [DIAGNOSTIC]. Cursor to the Maintenance and Lube tabs.
Classic Haas Control: Press [PARAM DGNOS] (2) times and cursor to the LUBE tab.
Press [F3] to start the 30 second Spindle Lubrication Test.

If the multimeter or voltage detector does not show 120 VAC during the test, refer to:

Oil Collection Test

Corrective Action:

Perform an oil collection test [1]. Refer to Mill - Spindle - Lubrication Oil - Collection Test.

If the oil supply is insufficient, and all other functions have been checked, replace the flow meter [2] in the oil pump.

Note: Make sure to assemble the flow meter with the arrow pointing toward the hose as shown.