Bosch Powerpak frame mount

[Chuckmobile]

Hi, I'm new to the forum and have owned a 2014 Haibike FS for a few months now. I rode the South Downs Way on it last weekend, and over the 100 miles or so of fast rutted chalky tracks the lower end of the mount (with the electrics) loosened off and is now very wobbly. I had to ride a fairly long way with a cork jamming the mount from the frame blow, and with a couple of cable ties. There is no obvious way of getting through to the point where the mount is connected to the frame other than by removing a couple of star drive screws (why do these exist? - they are no better than an allen bolt and require you to carry more kit) which are on a top plate near the contacts. The thing is I don't want to do so only for the unit to fall apart, and seeing there appears to be no manuals or fitting instructions on the web I was wondering whether anyone has had the same problem and how easy is it to fix?

Thanks

 

[Martin@e-bikeshop]

Hi,

The mounts have a small amount of movement in them, you can use this to remove some of the play of the battery once seated.

You are correct, to access the frame bolts you need to remove the small Torx head bolts. Of course a quick trip or call to your dealer can resolve this.

Also worth mentioning that with once of my battery covers fitted it tightens the gap between the battery and the frame, causing less play. It also keeps the battery protected and give a little more range in the winter. Its a win win.

You can find the battery covers here - http://www.e-bikeshop.co.uk/eBike-Spare-Parts/fahrer-bosch-battery-cover-ebike-2013-2014

Regards
Martin

 

[Chuckmobile]

Thanks v much for the advice - it sounds like a fairly straightforward to fix.

 

[Aushiker]

There is no obvious way of getting through to the point where the mount is connected to the frame other than by removing a couple of star drive screws (why do these exist? - they are no better than an allen bolt and require you to carry more kit) which are on a top plate near the contacts.

From Wikipedia ...

The Torx design allows for a higher torque to be exerted than a similarly sized conventional hex socket head without damaging the head and/or the tool. The diagram on the right depicts the interaction between the male and female components of a conventional hex drive and a Torx drive. The clearance between the components is exaggerated for clarity. The diagram does not show a true Torx profile, but illustrates the general shape and geometry.

Andrew

 

[Chuckmobile]

Maybe, but somewhat over engineered to hold a lightweight plastic plate in place???

 

[Martin@e-bikeshop]

Maybe, but somewhat over engineered to hold a lightweight plastic plate in place???

Thats the Germans for ya!
They are also used in areas where they dont like people to 'fiddle' with too much as not everyone has Torx bits.

Regards
Martin

 

[Aushiker]

Maybe, but somewhat over engineered to hold a lightweight plastic plate in place???

Not the fault of the Torx screw but or the designers of same.

Andrew

 

[shemozzle999]

Maybe, but somewhat over engineered to hold a lightweight plastic plate in place???

Actually I think it is under engineered to support the weight of the battery pack while being used off-road, probably needs at least one more fixing lug.

Sometimes it is difficult to see where the "ebike" specific design features are on these relatively standard conventional looking bikes.