PulseJet - Troubleshooting Guide

Introduction

The Haas PulseJet System is a programmable tap/drill oiling system that provides precise, controllable lubrication directly to the cutting tools that require targeted lubrication. This system pressurizes the oil tank that delivers the pressurized oil to the nozzle which is then pressurized and delivered to the cutting tool.

Symptom Table

Symptom	Possible Cause	Corrective Action
Large amount of air leaking from the cap when the PulseJet is cycling.	The tank cap seal is dislodged and the tank no longer holds pressure.	Reinstall the cap and verify the PulseJet works correctly. See the cap seal section below.
The PulseJet stream does not have good oil volume or pressure.
The tank does not seem to pressurize/depressurize when the PulseJet is cycling.
Alarm 9140 PULSEJET OIL LEVEL LOW	The oil level in the PulseJet tank is low.	Refill the PulseJet tank to the Full Line on the tank. Run the PulseJet purge cycle if the PulseJet tank was run dry.
The control gives the message FUNCTION LOCKED when you press [COOLANT], or the control gives Alarm 363 COOLANT LOCKED OFF when a program commands the coolant pump on or off.	Setting 32 Coolant Override is set to OFF.	See the Setting 32 page for additional details and Alarm 363 video instructions.
The PulseJet does not turn on for a defined number of pulses.	Setting 370 has not been configured.	See the Setting 370 page for detailed instructions on how to set the PulseJet squirt count.

Reinstall Cap Seal

1

Remove the tank cap and check to see if the seal is in place. If it is out of position[1] or not visible[2], it will need to be reinstalled. Seal in the correct position[3].

2

Remove the tank cap and check to see if the seal is in place. If it is out of position or not visible, it will need to be reinstalled.

Use a flathead screwdriver to separate the cap assembly. There are four clips that hold it together.

Remove the ratchet plate and the cap seal and thoroughly clean all the components.

Reinstall the ratchet plate. It can only be installed one way. Reinstall the cap seal.

Press both pieces together until the clips snap into place.

Reinstall the cap and verify the PulseJet works correctly.

Prime the Oil Line

Make sure there is oil in the PulseJet reservoir and that the lid is tightly installed. Make sure the reservoir air and oil lines are connected.

Disconnect the oil line [1] from the PulseJet nozzle and let it drape over a container placed on the mill table.

Press [DIAGNOSTIC] and navigate to the Maintanance then to the PulseJet tab [2].

Press [F4] to begin a priming cycle. Each cycle lasts 10 minutes. The reservoir will be pressurized during the cycle.

Note: Small machines may take only 1 cycle to fully prime the line. Larger machines may take 3 or 4 cycles. Heavier oils may take longer to prime. Continue running priming cycles until oil [4] begins to drip out of the oil line into the container.

Note: While the machine is in the prime cycle the user can start a program. However the user will not be able to start the prime cycle again while the program is running.

Reconnect the oil line to the PulseJet nozzle.

In MDI run:

M162 P10;
G04 P10.;
M30;

Test the PulseJet until a strong stream develops.

Tips and Troubleshooting

1. PulseJet will produce a consistent, fast, and tight oil pulse if the line is well primed, the dispenser needle is not clogged, and a recommended oil is being used.

2. To always keep the line well primed:

Place the reservoir assembly near or above the spindle elevation
never let the tank run completely dry

3. If you suspect that the dispenser needle is clogged, replace it. To do this, unscrew the knurled nozzle cap from the nozzle and gently twist and pull the yellow base of the needle off of the nozzle.

Note: This will expose the small check valve spring, do not lose it. Firmly press the replacement needle onto the nozzle taper. Re-install the nozzle cap finger tight.

4. Use recommended oil: light viscosity oils and tapping or cutting fluids work the best. Heavy viscosity oils such as motor oil, gear oil, or heavy tapping oils may not produce a high-quality stream.

5. If the oil line does get air bubbles inside, the pump inside the PulseJet nozzle will pass them through the system. While bubbles are moving through the nozzle, the stream will appear weak, aerated, and inconsistent. After the bubbles pass through, the stream will return to its proper form.

6. Always make sure the reservoir cap is installed and tightened when running PulseJet to maintain the proper tank pressure.

PulseJet Lubrication

Refer to Lubricant Grease, and Sealant Table to see our recommended oil list.