Fron Isolastic

I'm renewing the front isolastic mount for overhaul and possible replacement. How hard should it be to get the main bolt out. I have the head off anyway so have the bike on it's side stand and the weight of the engine taken on a jack. I've managed to get the bolt about an inch into the mount but it's not moving very fast. I'm having to resort to hitting it with a lug hammer which is moving about 5mm for every 5 hits.

Should it be this hard? There's quite a bit of play in the bolt so I' think I've got the support with the jack right. Is it normal for it to be this stiff or should I wait until I have the head back on?

Many thanks,

Spray lots of penetrant and keep whacking. They tend to rust in the bore.

That bolt goes through three steel spacers; maybe rust inside the spacers is keeping the bolt from sliding out?
It happens to automobile suspension components here in Detroit where the roads are salted all winter. Jim P.

grandpaul said:

Spray lots of penetrant and keep whacking. They tend to rust in the bore.

Click to expand...

I have learned that when removing parts from old Commandos, sometimes you have to really beat things like they owe you money.