Loose front calliper

[GlasgowFinn]

The front calliper on my road bike is loose. It can easily be moved from side to side.

I'm not sure how to go about tightening it. There is an Allen bolt through the front of it and what looks like a nut with two tiny Allen bolts behind it.

Can anyone advise or would I be as well to take a trip to the LBS. I'm touring on the bike next weekend and my technical know how is poor but I'm keen to learn!

Thanks

 

[Chutzpah]

I stand to be corrected, but I believe that's a centre-pivot side pull brake - if so is there a 5mm hex bolt on the other side of the fork? Give that a tighten whilst holding the brake centred

 

[accountantpete]

The front nut and those two little nuts are to adjust how tightly the two arms knit together - so best left alone.

The caliper is held tight by a hidden hex nut at the back of the forks - you should see the hole very easily. Just tighten up on that until the calipers are tight and central.

 

[GlasgowFinn]

Sorry gents, I forgot I hadn't replied. Thanks both for your help - that hidden hex bolt was indeed the source of the problem.