Dating lionel zw transformers
You don't need the press, but you do need to be experienced and comfortable working on 120V appliances.
I agree with Jim re the noise and operation of the ZWs.
The Model R 275W has the riveted lamination and is dead silent, although even the earlier ZWs produce a very low hum at best. As for roller replacement, I've done three ZWs with nothing more than pliers and diagonal cutters or small nippers.my dad recently found a ZW 275 transformer for my layout and I was told I need to add a 5 amp fuse or a circuit breaker somewhere to protect modern locomotives, can anyone shed some more light on this?