Pre-Project Equipment Testing: Essential Steps for Microtunneling Success

By: Robin Lorenzen, Sales Manager, Akkerman Inc.

If you own a microtunneling system that has been sitting idle in your equipment yard for a while, and you now have a new project lined up, it’s crucial to prepare before arriving on-site. Downtime and mistakes in the field can be costly—so let’s get everything ready in advance.

We understand that in colder climates, a full-blown slurry test before mobilization might not be practical. However, there are essential pre-checks you can and should perform ahead of time to minimize potential issues on the jobsite.

Start with the Basics

Akkerman and I strongly recommend referring to your equipment manuals for detailed instructions on system readiness. You can access these manuals by creating a login at Akkerman’s website.

Below is a condensed version of key preparation steps, along with some practical shortcuts I’ve learned over my years at Akkerman.

Power Up and Test Hydraulics

Connect the MCC to the machine and power it up.
Test all hydraulic functions, including:
- Steering
- Slurry valves
- Torque wings
Verify calibrations to ensure no changes have occurred.
Use an air compressor with a regulator to test low-pressure transducers on the slurry and cooling circuits.
Check the inclinometers with a digital level for accuracy.
Test the target and laser system using a red laser to ensure proper function.

Preparing the VFDs

Variable Frequency Drives (VFDs) require extra attention, especially if the system has been idle for an extended period.

Follow the manual’s specific procedure for firing up VFDs after a long shutdown.
Test the cutter head for correct rotation direction and no-load torque.
For pump VFDs, uncouple the motor from the pump before testing function and rotation direction.
Do not run the pump without fluid.

Preparing the VFDs

Check all system fluid levels and top them off if necessary.
Grease all points as specified in the manual.
Inspect hoses for wear and replace any that look questionable.

Jacking System Readiness

Test the jacking system to ensure proper function.
Flow meters for the jacking system are available—reach out to aftermarket support if needed.
As a microtunneling contractor, you need the right tools to perform at your best. Help us help you by making sure your equipment is ready.

Final On-Site Checks

Once on the jobsite, conduct a final check of all functions and set up the separation plant. Before pushing the machine into the seal:

Visually confirm slurry flow through the machine.
Verify alignment and target readings to ensure accuracy.

A day or two spent now on preparation can save weeks of frustration later.

Proactive Problem-Solving

We all know that challenges arise in microtunneling projects. The key is to resolve issues as they come up, rather than allowing them to stack up. The sooner you address a problem, the less impact it will have on the project.

Now, let’s get to work—confident that you’ve done everything possible to avoid unnecessary issues to complete your drive.