Removal of the External Transfer Box

Removal of the External Transfer Box

Shift the Rohloff SPEEDHUB 500/14 into gear number 14 before disconnecting the cable box. Next, remove the wheel from the bicycle taking note of the information in section Wheel Removal.

Position the SPEEDHUB wheel on a workbench with the non-drive side facing upward.

Axleplate position
Note the position of the axleplate with a marker pen or scribe prior to removing it.  
 
Tip: Take a photograph of the position for future reference

Axleplate removal 
Uncrew the 5 TX20 axleplate screws (Torx TX20 T-Wrench) to remove the axleplate. Discard these screws as they are single-use only!

Remove shift cog 
Use a set of tweezers to lift the shift cog up and off of the shifting shaft.

Lift the entire External Transfer Box up, and off of the Rohloff SPEEDHUB 500/14 axle.

Attention:
Ensure the open end of the Rohloff SPEEDHUB 500/14 faces upward at all times to avoid the risks of: oil loss / freewheel spring loss

Remove the two old, green paper gaskets from SPEEDHUB 500/14 or External Transfer Box (may have stuck to either component due to oil).  Do not reuse these gaskets!

Mounting the Rohloff External Transfer Box

If the Rohloff SPEEDHUB 500/14 was not shifted into gear number 14 prior to removal of the External Transfer Box, then you will need to follow the process outlined directly below.

Shift the Rohloff SPEEDHUB 500/14 per hand, into gear number 14 by rotating the shifting shaft manually using an 8mm wrench. Gear 14 will require the shifting shaft to be rotated in a counter-clockwise direction as shown in the illustration to the left.

Fit new paper gaskets to the back of the External Transfer Box as illustrated in the photo to the left.
 
Ensure the holes of the gasket are orientated directly over the screwholes of the External transfer box. 

Freewheel Springs
Check that both freewheel springs are present and correctly installed.

Attaching the  External Transfer Box back onto the SPEEDHUB 500/14 axle
 
Attention:
Refer to Rohloff SPEEDHUB 500/14 Owners Manual – Appendix “Grub Screw of the External Gear Mech”
 
Orientate the blind hole of the Rohloff External Transfer Box, so that this is located directly over the grub-screw (as illustrated in photos above).

Orientate the two guide pins of the External Transfer Box, so these are located directly over the two freewheel springs (as illustrated in photos to the left).

Place a cable pulley over the hexagonal peg of the External Transfer Box, and rotate this so the two grub screws create a parallel libne through the center of the hexagonal peg of the SPEEDHUB shifting shaft. This ensures the teeth of the internal cogs are aligned correctly, ready to accept the small cog in the next step. Hold the cable pulley in this position to prevent it from rotating until the small cog is fitted.

Ensure the teeth of the shift cog are facing upward, away from the gear-unit, with the rounded side facing down. Reinstall the shift cog onto the shifting shaft. The hexagonal fitment creates 6 possible positions to reinstall this small cog - only one will be correct, whereby the cog will slip easily into position without force.
 
Attention: Refer to Rohloff SPEEDHUB 500/14 Owners Manual – “Changing the Gear Mech”

Attention:
The shift cog will only slip easily onto the hexagonal shifting shaft, in one of the six possible orientations.

If a brake rotor needs to be mounted, then make sure this is done now, prior to refitting the axleplate, as the axleplate orientation may prevent the rotor being slipped into position.

Place the axleplate back on top of the External Transfer Box, in the correct orientation as prior to removal. Secure in place using 5x new TX20 axleplate screws.  (Torx TX20 T-Wrench, 3Nm / 25”lbs).