What causes Haas alarm 95?

Empty or critically low lubricant reservoir preventing pump from generating pressure, often combined with lack of regular visual inspection by operator. Clogged progressive divider block or individual metering valves due to congealed lubricant or contamination, blocking flow to one or more lubrication points. Faulty lubrication pump motor or worn pump elements unable to generate sufficient pressure to cycle the progressive divider and trigger the pressure switch. Broken or kinked lubrication lines between pump and distribution block, or between dividers and machine slideways, preventing lubricant delivery. Defective lubrication cycle pressure switch or proximity sensor that fails to signal MOCON when lubrication cycle completes, even though system is functioning mechanically.

How do I fix Haas alarm 95?

1. Step 1: Check lubricant reservoir level and fill with Mobil Vactra 2 or recommended equivalent if low, then cycle lubrication pump manually using Parameter 53 (LUB CYCLE) to attempt normal operation 2. Step 2: Observe progressive divider block during manual lubrication cycle for sequential movement of indicator pins; each pin should extend in order indicating proper flow through that section of divider 3. Step 3: In Diagnostics mode, monitor lubrication pressure switch or cycle complete input while manually triggering pump; if pump runs full cycle without switch closure, replace pressure switch 4. Step 4: Disconnect lubrication lines at each divider output and manually cycle pump to verify lubricant flow from each port; lack of flow indicates clogged divider requiring cleaning or replacement 5. Step 5: Check lubrication pump motor operation by listening for motor hum and feeling pump body for vibration; if motor runs but no pressure builds, replace worn pump cartridge or complete pump assembly 6. Step 6: If all mechanical components function but alarm persists, verify MOCON input wiring from pressure switch and check Parameter 53 timing settings; adjust timing or repair wiring as needed before replacing MOCON

Haas codes

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Haas Controller

Lubrication · Intermediate · 45-90 minutes

Alarm 95

HAAS Alarm 95 - Lubrication System Failure

Alarm 95 fires when the Haas NGC control detects insufficient lubrication system pressure or flow through the automatic lube pump circuit. The control monitors lubrication system status through pressure switches and flow sensors that trigger this alarm when proper oil delivery to critical machine components cannot be verified.

HaasLubricationIntermediate45-90 minutes

95

HAAS Alarm 95 - Lubrication System Failure

Lubrication System Failure

The automatic lubrication system has failed to complete its lubrication cycle or has detected a fault condition that prevents proper delivery of lubricant to machine ways and ballscrews. The MOCON board monitors lubrication pump cycle completion via pressure switch or cycle timer, and this alarm fires when the system does not confirm successful lubrication within the programmed interval. Continued operation without proper lubrication will cause accelerated wear and potential damage to linear guides and ballscrew assemblies.

Root Cause Summary

Safety

Verify spindle is completely stopped before accessing lubrication components
Used lubrication fluid may be hot and contaminated, handle with care
Do not operate machine extended periods without functional lubrication system

Causes and Fixes

1
Check Oil Level Indicator
Navigate to CURRENT COMMANDS > AUX FUNCTIONS and observe the lubrication system status display. Check the physical oil sight gauge on the lubrication tank.
Machine must be powered on to check electronic oil level sensors
2
Inspect for Oil Leaks
Examine all lubrication lines, fittings, and metering valves for external leakage. Check under the machine base and around axis slide ways for oil accumulation.
Use a flashlight to check hidden areas behind the spindle head and under the table
3
Refill Lubrication System
Add Haas-approved way oil (typically ISO 68) to the lubrication tank. Fill to the maximum level mark and cycle the lube pump manually using M08 command.
Use only Haas-specified lubricants to prevent system damage
4
Reset Alarm and Test
Press RESET to clear Alarm 95, then execute M08 to manually activate lubrication. Monitor pressure gauge and verify oil flow to all metering points.

DIY Feasiblehigh confidence

Call a technician if:

·Pump motor replacement required
·Electrical cabinet modifications needed
·Multiple system components failing simultaneously

Prevention

Check oil level weekly during operation
Replace lubrication oil annually or per Haas schedule
Clean metering valves during preventive maintenance
Monitor for external oil leaks during daily inspection

Common Mistakes

Using incorrect oil viscosity grade
Overfilling lubrication tank causing pressure issues
Adjusting metering valves without proper flow measurement
Ignoring small oil leaks that lead to system failure

Related Alarms

94 96 97

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