Alpha HW615/Ambassador C14 Bandsaws: How to Reset the Upper Flywheel

Created by Hung Nguyen, Modified on Thu, 21 May at 9:46 AM by Gabriel Izzo

Alpha HW615 / Ambassador C14 Band Saws · Troubleshooting

How to Reset the Upper Flywheel

Applicable Models

Alpha HW615

Alpha HW615 Pro

Ambassador C14

Ambassador C14 Pro

If you're experiencing issues with the upper flywheel — such as rubbing against the chassis, refusing to tilt, failing to track the blade correctly, or binding during tensioning — this guide will walk you through how to reset it to its default working position. Both the Ambassador C14 and Alpha HW615 share a similar upper wheel and tilt system.

Symptoms That May Indicate This Issue

Upper wheel does not spin freely

Loud grinding or rubbing sounds during operation

Unable to tension or track the blade properly

Wheel appears misaligned or tilted inward toward the frame

⚠ Safety — Read Before Beginning

Always unplug the machine from power before performing any service or adjustment. Do not attempt this procedure while the band saw is plugged in or powered on.

The upper wheel, blade, and tracking components can move unexpectedly when the machine is energized, posing a serious risk of injury.

Wear cut-resistant gloves when handling the blade. Ensure the machine has come to a complete stop before touching any internal components.

Wear safety glasses at all times during this procedure.

Tools Required

Hex / Allen Wrench Set Adjustable Pliers / Wrench

Reset Procedure

Remove the Blade and Upper Guard

Remove the blade entirely. Also remove the upper blade guard to gain full access to the wheel area.

Back Out the Tracking Knob Fully

Loosen the jam nut (the aluminum disc/ring).

Back out / unscrew the tracking knob until fully disengaged — or remove it entirely if needed.

This relieves tracking pressure and prepares the flywheel to be manually repositioned.

Reset the Tilt Position

If the flywheel is tilted and rubbing the chassis, reset its angle using the pivot axis:

If the bottom half of the wheel is tilted inward — pull it outward to re-center it.

If the top half is tilted inward — push the bottom inward to restore alignment.

The assembly pivots on a central axis. If it feels stuck, proceed to Step 4 before forcing it.

Loosen the Pivot Bolts (If Stuck)

Locate the two nylon lock nuts that secure the flywheel's pivot block to the frame on both sides of the upper assembly. Loosen them very slightly — just enough to relieve pressure and allow the flywheel block to shift or pivot freely.

Do not over-loosen these nuts. Doing so can introduce play (slop) in the flywheel alignment and affect long-term cutting performance.

Step 4 — Pivot Block Nylon Lock Nuts Location

Pivot block nylon lock nut locations on upper flywheel assembly

Confirm Free Movement

Once reset, the wheel should rotate freely and be able to move up and down on its vertical guide rods (without a blade installed). Gently lift and rotate the wheel by hand to confirm it is no longer contacting the chassis frame.

Tensioning Needle Caution

Be cautious with the tensioning indicator needle — moving the wheel too high or too low can cause the needle to fall off the tensioner block assembly inside the upper housing. If that happens:

Raise the wheel fully

Manually hook the needle back onto the tension plate inside the block

Lower the wheel carefully to re-engage the mechanism

Contact support and ask for the "Tensioning Needle Reset" video if needed.

Reattach and Tension the Blade

Re-install the blade, then re-tension it before proceeding to tracking adjustment.

✓

Reinstall and Adjust Tracking

Reinstall the tracking knob.

Make small, gradual adjustments while manually spinning the upper wheel by hand.

Watch how the blade responds and adjust until the blade centers properly on the flywheel.

Additional Tips

Stuck Tensioning Knob

If the tensioning knob becomes stuck, it may be due to a jammed nut or disc. Try using a pair of adjustable pliers — use a towel to protect the nut from being marred.

Avoid Forcing Components

If anything feels bound, stop and check alignment, screws, or contact our support team before proceeding.

Success Checklist

✓

Flywheel spins freely with no resistance

✓

No rubbing or grinding sounds

✓

Blade is centered and tracks smoothly on the wheel

✓

Tensioning system is responsive and stable

Reference Video