You need to find a gunsmith.
The Legacy / Puma 92 is one of them! http://www.gunblast.com/Paco_Legacy_454.htm
Rossi produces the Puma which is a .357/.38 lever action rifle . It is a copy of a Winchester 92 I think. Also marlin, and maybe even Henry have .357/.38 levers.
Best left to a gunsmith
Marlin, Henry, Puma
marauder.homestead.com
Best left to a trained gunsmith
You really should leave this to a trained gunsmith.
.38 Super MAY be fired in a .357 magnum firearm. Due to the semi-rimmed cartridge case, it may not extract, headspacing may be off. Not recommended.
IT Has 1 you can disassemble the cowl lever & wiper motor to get to it.
You will have to contact Rossi or find one of their catalogs
You can download a manual here - http://www.henryrepeating.com/freestuff.cfm
To disassemble a Browning Model 1886 lever action rifle for cleaning, first ensure the rifle is unloaded. Then, remove the barrel by loosening the magazine tube band and sliding the magazine tube forward. Next, remove the lever by pushing out the lever pivot pin and then taking out the bolt and carrier. Finally, clean all components thoroughly before reassembling the rifle in the reverse order.