Example Cartridge Seals

	New cartridge seal.
	Cartridge seal with an acceptable bubble - this seal is okay to use.
	Nearly empty cartridge seal - this seal should have been replaced when the oil level reached 1/2 of the original volume. Cartridge seals like this should not be used.
	Cartridge seal with contamination - this seal should be replaced. Cartridge seals like this should not be used.