I haven't changed the bearings on a van, but I expect they little different to those in a car except perhaps a little more heavy duty.
To get the cap off you just need to get a straight blade screwdriver and insert at the joint with the drum and tap it with a hammer. You should then see the cap start to move, its just tap fit so should come out fairly easily.
However, each whell has two taper roller bearings fitted in opposing directions, so one takes the load on right hand corners, the other on left.
The fact that it doesn't happens when you turn left does not necessarily mean it the near side wheel. It could be either nearside inner bearing or offside outer bearing.
Best kack up each wheel in turn and spin it, you should be able to hear a difference between the two to tell you whether its near or offside.
You should always change both complete bearings in the wheel, the outer track of both is a press fit in the drum, but you can easily knock it out. Just changing the inner part of the bearing will not improve things if the outer track is worn.
There are quite a few other things you need to know if you plan doing this!
Monday, 28 May 2007