ZE186 - Grease Fitting Cleaner is an accessory designed for dependable use with Goat Pumps fluid-transfer equipment and compatible setups. About this Item:. Grease Fitting Cleaner clears clogged grease fittings and loosens hardened greasing joints. Designed to be tapped with a hammer, it efficiently forces light viscosity oil through the tool into the coupler and grease joint, effectively eliminating dirt and debris.