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RUNGU Dualie User manual

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V1.0 Rungu Chainguard installation
Copyright 2022 Standard Bearer Machines, LLC Page 1 of 13
rungu® dualie chainguard
installation
The Rungu Dualie Chainguard installs on top of the 30T chainring on all Rungu Dualie double-wheel e-
bikes. The chainguard keeps your right pant cuff from being pulled in between the chain and chainring
on your Rungu Dualie.
Note: Do not use the Rungu Dualie Chainguard if your Rungu Dualie uses a larger chainring.
V1.0 Rungu Chainguard installation
Copyright 2022 Standard Bearer Machines, LLC Page 2 of 13
Contents
Tools required ............................................................................................................................................... 2
Removing the right crank arm ...................................................................................................................... 2
Installing the chainguard ............................................................................................................................... 6
Replacing the crank arm and chain ............................................................................................................. 10
Tools required
• 4 mm Hex Wrench
• 8 mm Hex Wrench
• Park Tool CCP-22 Crank Puller, or equivalent.
• Chain whip - suggested purchase
• Bike Chain master link pliers - suggested purchase
Removing the right crank arm
First, rotate the chain so that you find the master link on the return side (bottom) of the chain. Use the
master link pliers to compress the master link and disconnect the chain.
V1.0 Rungu Chainguard installation
Copyright 2022 Standard Bearer Machines, LLC Page 3 of 13
Drape the upper length of chain over the chainstay as shown below.
Use the 8mm hex wrench to unscrew and remove the crank arm bolt
V1.0 Rungu Chainguard installation
Copyright 2022 Standard Bearer Machines, LLC Page 4 of 13
Install the crank puller into the crank arm.
CAUTION: BE CAREFUL TO NOT CROSS THREAD THE CRANK PULLER MOUNTING NUT INTO THE CRANK
ARM. FAILURE TO DO SO MAY DAMAGE THE CRANK ARM. CROSS THREADING IS NOT COVERED BY
MANUFACTURER’S WARRANTY.
CAUTION: MAKE SURE CRANK PULLER MOUNTING NUT IS AT LEAST FIVE (5) THREADS DEEP INTO
CRANK BEFORE TAKING NEXT STEP.
V1.0 Rungu Chainguard installation
Copyright 2022 Standard Bearer Machines, LLC Page 5 of 13
Rotate the crank arm puller clockwise to remove the crank arm.
Unscrew and remove the crank arm puller from the crank arm.
V1.0 Rungu Chainguard installation
Copyright 2022 Standard Bearer Machines, LLC Page 6 of 13
Installing the chainguard
Use the chain whip to stabilize the chain wheel and use the 4mm hex wrench to loosen and remove
each of the five screws holding the chain wheel to the motor.
V1.0 Rungu Chainguard installation
Copyright 2022 Standard Bearer Machines, LLC Page 7 of 13
Place one of the M5x14 screws with a split washer through the chainguard and chainring.
Align both with a mounting hole on the motor, install and finger tighten the screw.
V1.0 Rungu Chainguard installation
Copyright 2022 Standard Bearer Machines, LLC Page 8 of 13
Install the next screw and split washer into a mounting hole on the opposite side of the spindle.
Finger-tighten the second screw, then install and finger tighten the remaining three screws and washers.
V1.0 Rungu Chainguard installation
Copyright 2022 Standard Bearer Machines, LLC Page 9 of 13
Use a 4 mm hex wrench to hand tighten each screw in a crossing pattern
Finally use the chain whip to secure the chainring and fully tighten each screw using the same crossing
pattern.
V1.0 Rungu Chainguard installation
Copyright 2022 Standard Bearer Machines, LLC Page 10 of 13
Replacing the crank arm and chain
While holding the left-side crank arm vertically, install the right crank arm 180 degrees opposite the left-
side onto the square shaft.
V1.0 Rungu Chainguard installation
Copyright 2022 Standard Bearer Machines, LLC Page 11 of 13
Insert the crank arm retention bolt and begin threading it into the drive axle.
Use the 8 mm hex wrench to fully tighten the crank arm retention bolt to the drive axle.
V1.0 Rungu Chainguard installation
Copyright 2022 Standard Bearer Machines, LLC Page 12 of 13
With the crank arm in place and fully tightened, drape the drive side (top) chain over the top of the
chainring.
Use the master links to reconnect the return side (bottom) of the chain.
V1.0 Rungu Chainguard installation
Copyright 2022 Standard Bearer Machines, LLC Page 13 of 13
Use the master link pliers to spread the master links and snap the master link in place
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