33

Check coolant tank level

Visually inspect the coolant tank and verify level is above the minimum fill line. Check tank sight gauge if equipped.

Ensure machine is in EMERGENCY STOP before opening any coolant system components.

Refill coolant tank

Add appropriate coolant mixture to bring level to maximum fill line. Use manufacturer-recommended coolant concentration (typically 5-10%).

Always mix coolant concentrate with water before adding to tank to prevent concentration hot spots.

Prime coolant system

Press COOLANT button on control panel to activate pump and verify flow returns to normal. Monitor for proper flow at spindle nozzle.

Run coolant for 30 seconds to purge any air from the system after refilling.

Locate coolant filter assembly

Find the inline coolant filter, typically located between the tank and pump or after the pump in the coolant circuit.

Turn off coolant pump and relieve system pressure before removing filter components.

Remove and inspect filter element

Unscrew filter housing and remove filter cartridge. Check for debris, metal chips, or biological growth blocking the filter media.

Take a photo of the dirty filter to help determine contamination source and prevent recurrence.

Clean or replace filter

If cleanable type, rinse with clean water and compressed air. If disposable, install new filter element with proper orientation.

Keep spare filters in stock and establish regular replacement schedule based on usage.

Test system operation

Reassemble filter housing, activate coolant pump, and verify flow rate returns to normal. Clear Alarm 33 using RESET button.

Ensure filter housing O-rings are properly seated to prevent leaks.

Check pump motor operation

Activate coolant from control panel and listen for pump motor operation. Check for unusual noises, vibration, or lack of motor sound.

Compare current pump sound to normal operation - grinding or squealing indicates bearing or impeller problems.

Verify electrical connections

Check pump motor electrical connections in the electrical cabinet. Look for loose connections, burned contacts, or tripped overload relay.

Lock out main power and verify zero energy before working on electrical connections.

Test pump performance

Measure flow rate at spindle nozzle using flow meter or timed volume collection. Compare to specification in Haas manual.

Typical spindle coolant flow should be 2-5 GPM depending on machine model and spindle size.

Replace pump if necessary

If pump fails performance test, replace pump motor assembly or contact Haas service for pump rebuild kit.

Use only Haas-approved replacement pumps to ensure proper flow rate and system compatibility.

Inspect visible coolant lines

Check all visible coolant tubing for kinks, crushing, or obvious blockages. Pay attention to areas where tubing may contact moving machine components.

Use a flashlight to inspect tubing in dark areas of the machine enclosure.

Check spindle coolant nozzles

Remove spindle coolant nozzles and inspect for chips, debris, or thread sealant blocking the orifice.

Clean nozzles with compressed air only - do not use wire or drill bits that could enlarge the orifice.

Perform line backflush

Disconnect coolant line at spindle and use compressed air or reverse flow to clear any internal blockages.

Backflushing often reveals metal chips or debris that accumulated at line restrictions.