Crank Removal and Installation: Campagnolo® Power Torque™

This article will review the service of the Park Tool CBP-8 Crank and Bearing Tool Set servicing the Power Torque™ crank system from Campagnolo.
NOTE
: before watching video, see ALTERNATIVE REMOVAL TECHNIQUE below.

1

Getting Started

What Tools do I need?

The Power Torque™ crank uses a spindle integrated into the drive side
crank. The left side crank is removed to get to the bearings or to remove the right crank.

The Park Tool CBP-8 Campagnolo® Crank and Bearing Tool Set
The Park Tool CBP-8 Bearing Tool Set
2

Alternative Removal Technique

IMPORTANT NOTE: The Power Torque™ lacks any factory designed removal
design or procedure. The Power Torque™ cranks are very difficult to grab and secure for a pulling operation. There will be inherit risk in servicing cranks of the Power Torque™ design.

For arm removal, consider the ALTERNATIVE REMOVAL TECHNIQUE described here.

1. Remove right side bearing clip from cup.

2. Remove crank bolt and washer. Select the 1198 Extension Plug. Plug is sized to only engage the spindle.

    Crank bolt and wash removed and spindle ready for 1198 Extension Plug
    Crank bolt and wash removed and spindle ready for 1198 Extension Plug

    3. Insert the plug into the spindle.

    1198 Extension Plug installed in arm
    1198 Extension Plug installed in arm

    4. Brace bottom bracket. Have someone assist by holding right side as necessary.
    5. Use a large mallet to squarely strike the 1198 Extension Plug.

    Strike plug with force using large mallet
    Strike plug with force using large mallet

    6. Spindle is driven right and out of left arm.

    Spindle partially removed from arm
    Spindle partially removed from arm
    7. Continue until arm is free of spindle. Expect right crank to fall as it is freed of left arm.
    Arm is free of spindle
    Arm is free of spindle

    This impact technique does not damage the cartridge bearings in the system. The force is on the spindle and does not pass through the bearings to free the left arm. If the spindle has not been properly lubricated, it can be difficult to remove.

    The pulling procedure is described below.

    3

    Aluminum Power Torque™ Crank Removal

    1. Remove the clip from the drive side bearing cup. The spindle cannot be removed with this clip in place.
    Remove clip from right side bearing cup

    Remove clip from right side bearing cup

    Remove crank bolt with a 14mm hex wrench such as the HR-14

    Remove crank bolt with a 14mm hex wrench such as the HR-14

    1. Remove crank bolt and washer using a 14mm hex wrench.
    2. Slide the plastic molded pad on to the crank. Install the extension plug into the spindle.
    Install mold over crank and install extension plug
    Install mold over crank and install extension plug
    1. Engage the puller from the CBP-3 set over the molded pad. Align puller and use knob to remove play from the puller fingers. Ends of puller fingers should engage the recess behind the mold. There should be no play between finger and puller body.
    Install puller over extension stud and remove play from fingers

    Install puller over extension stud and remove play from fingers

    Correctly positioned finger ends in pad recesses

    Correctly positioned finger ends in pad recesses

    1. Tighten handle of puller to pull arm from spindle.
    2. Remove puller, mold, and extension plug from from left arm.
    Left arm lifting free of spindle
    Left arm lifting free of spindle
    1. Pull crank to the drive side and remove it from the bike.
    4

    Carbon Arms

    On the left, the curved radius of the aluminum arm. On the right, the flatter backside of the carbon arm.
    On the left, the curved radius of the aluminum arm. On the right, the flatter backside of the carbon arm.

    The Power Torque carbon and aluminum left side arms are different in shape. Only the aluminum arm uses the molded pad. The back of the carbon arm is flat and provides good engagement with the fingers of the puller. Use only the fiberboard pads to prevent any cosmetic marking of the arm. If you run out of pads, use the pad card as a template and cut new pads from any card stock or thin cardboard.

    NOTE: Consider using the ALTERNATIVE REMOVAL TECHNIQUE described above.

    The pulling procedure to remove the carbon left arm:

    1. Remove crank bolt from left arm.
    2. Install one fiberboard pad, extension plug, and puller.
    Fiberboard installed behind carbon arm, extension plug installed in spindle, and puller being installed
    Fiberboard installed behind carbon arm, extension plug installed in spindle, and puller in the process of being installed
    1. Adjust puller knobs until play is removed from finger. Finger ends should engage crank on flat section.
    Adjust knobs on puller to remove excessive play at fingers
    Adjust knobs on puller to remove excessive play at fingers
    1. Turn handle to pull arm from spindle.
    Carbon lifted off spindle
    Carbon lifted off spindle
    5

    Bearing Removal and Installation

    The drive side bearing is pressed to the spindle. There is a C-clip that must be removed before pulling this bearing. The aluminum and carbon arms share the same service feature for bearing removal and replacement.

    The procedure for crank bearing removal and installation:

    1. Use a screwdriver or utility pick and work the clip up and off the spindle.
    Carefully work free the C-clip on the drive side crank
    Carefully work free the C-clip on the drive side crank
    1. Install the bearing remover adapter on the crank. Install adapter aligned with the arm of crank. Push adapter until fully engaged.
    Adapter installed below bearing
    Install adapter below bearing
    1. Install puller and engage fingers into arms of adapters. Adjust knobs of puller to remove play in puller.
    Adjust puller fingers onto bearing adapter
    Adjust puller fingers onto bearing adapter
    1. Tighten handle of puller to lift adapter and bearing from crank. Inspect the puller and adapter are lifting evenly and not twisting. Readjust as necessary.
    2. Install new seal and bearing on crank spindle. Place crank on smooth workbench, and place bearing installer over spindle. Use a hammer to drive bearing fully into place.
    Drive bearing fully onto spindle with repeated impacts
    Drive bearing fully onto spindle with repeated impacts
    1. Crank is ready to install.

    The left side bearing is pressed into the cup. It is Campagnolo’s intention that this entire cup with bearing should be replaced when bearing is worn out.

    6

    Crank Installation

    Both the aluminum and carbon cranks share the same installation procedure.

    1. Install crank through right side bearing.
    2. Install C-clip into pin holes of right side cup.
    3. Install pre-load spring and seal cover over left side bearing.
    4. Grease splines of crank. Grease threads of crank bolt.
    5. Align crank to point 180-degree opposite of drive side arm and install on spline of crank.
    6. Install crank bolt and secure to manufacturer’s recommended torque.