2nd, will not utilize a unstable, chlorinated solvent or solvent-style flushing compound to clean out the gearbox. Any solvent trapped inside the voids on the reservoir will result in corrosion. In terms of gearbox lubrication, applied oil tests is your simplest Resource for monitoring vital indicators like use metal concentrations, https://jeffreygsydh.blogrelation.com/40382725/the-basic-principles-of-gearbox-oil-treatment