Pedal Assist Sensor (PAS) Guide

While a throttle lets you control the motor power with your hands, a Pedal Assist Sensor (PAS) allows the ebike motor to be controlled from your pedaling. The cadence PAS send signals to the ebike motor whenever you are spinning the pedals.

The KG4 provide different speeds for each PAS level:

• PAS 1 = 5 KM/h
• PAS 2 = 10 KM/h
• PAS 3 = 15 KM/h
• PAS 4 = 20 KM/h
• PAS 5 = 25 KM/h

Maintenance Guide

Cleaning the sensor. Use warm water to slightly dampen a clean towel and gently wipe the sensor clean, and then pat dry. If the sensor is damaged, it may need to be replaced.

Sensor Replacement Guide

The pedal assist sensor is designed to be replaced in the unlikely event it is damaged or determined to be non-functional.

Tools needed:

• Flat side cutters
• 8 mm Allen wrench
• Crank puller for a square taper bottom bracket spindle
• Torque wrench capable of 35 Nm with an 8 mm Allen bit
• One replacement zip tie
• The replacement PAS sensor from Keego.

Remove the Crank

1. Prepare the ebike for maintenance. Press and release the power button and use the battery key to turn the battery key barrel to the “off, unlocked” position. Remove the key, then remove the battery. Press and release the power button to discharge residual power.
2. Disconnect the PAS sensor connector. Trace the cable coming out of the PAS (between the right crank and bottom bracket) to the connector below the battery mounting tray. Use flat side cutters to snip zip ties holding the cables if needed. Pull the connector directly apart to unplug without twisting.
3. Remove the crank on the right side of the bike
4. Use an 8 mm Allen wrench on the crank bolt head and turn counterclockwise to loosen and remove the crank bolt.
5. Clean the crank arm threads. Inspect the threads of the crank arm bolt hole and use a clean paper towel to remove any grit, which can damage the threads.
6. Prepare the crank puller tool. Ensure the inner bolt (the press-portion) is at least flush with, or slightly below, the edge of the outer (threaded) portion of the tool. This will ensure the tool threads can fully engage the threads on the crank (without being prevented from threading fully by the inner bolt).
7. Carefully thread the outer portion of the crank puller tool into the crank arm bolt hole by hand (about five full turns). Use caution to not cross or damage the threads. The outer portion of the crank puller tool will thread easily when properly aligned.
8. Secure the crank puller tool’s outer portion fully before engaging the inner bolt. This will ensure the crank and tool threads have as much gripping power as possible and avoid causing irreversible damage to the crank.
9. Press the crank off the bottom bracket spindle with the inner bolt of the crank puller tool. Turn and then leverage the handle of the tool so the inner bolt pushes against the bottom bracket to unseat the crank. Carefully remove the crank puller tool from the crank.
10. Complete

Install the New PAS

1. Remove the PAS. Note the orientation of the PAS and pull it directly off the bottom bracket spindle.
2. Slide the new PAS onto the bottom bracket spindle. Align the splines so the PAS sits flush with the edge of the bottom bracket.
3. Connect the PAS. Plug in the PAS by aligning the internal notch and pins (and external arrows) on the connector and press directly together without twisting to seat the connection.
4. Push the connector between the controller and the chainstay.
5. Secure the PAS cable with a zip tie so it is away from any moving parts. Use flat side cutters to snip the excess off the zip tie and ensure the cut is flush so there are no points that could damage the cable housing.
6. Complete

Reinstall the Crank

1. Reinstall the crank on the right side of the bike
2. Align the crank so the two cranks form a line, with the pedals on either end.
3. Align the crank so the two cranks form a line, with the pedals on either end.
4. Reinstall the left crank bolt using an 8 mm Allen wrench, tightening clockwise.
5. Torque the bolt to 35 Nm using a torque wrench with an 8 mm Allen bit.
6. Reinstall the battery, test the bike fully.
7. Complete