2005 Kawasaki KAF620 Mule 3010 Trans 4x4 Service Manual, Page 97Get this manual
COOLING SYSTEM 4-15 Radiator Cap
The radiator cap at the reservoir tank has the pressure relief valve, and must be inspectedThe cap at the radiator has no valve
CAUTION
Do not change the positions of the radiator cap at the reservoir tank and the cap at the radiator
Radiator Cap Inspection