2005 Kawasaki KAF400 Mule 600 and Mule 610 4x4 Service Manual, Page 28Get this manual
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PERIODIC MAINTENANCE 2-9 Specifications
API "GL-5" Hypoid gear oil SAE90: above 5C (41F) or SAE80: below 5C (41F) 2.4 (2.5 US qt), (B) 2.2 (2.3 US qt) Between and level lines (A, C) 24 9.00 10 D