Most
Victor and HMV No.4 Reproducers in original condition require replacement of
this gasket because most of them are as hard as a rock, cracked or loose. Old original
isolators are actually very easy to replace and do not require any
special tools. Careful use of a simple heat gun set to low or a common household hairdryer
is all you need to warm, soften and then remove the old isolator in. We
have safely removed thousands of isolators this way. NEVER use a torch
as a heat source. The flame tip of a torch is much too hot and may
severely damage your casting.