HOSE AS-GUARD 5207429 - Caterpillar

Illustration 1: Location of drain plugs in block and regulator housing.
Illustration 2: Location of drain plugs in oil cooler and block.... There is one plug to drain coolant from the oil cooler. See Illustration 2.... On all 3208 Engines (225 Excavators and 613 Tractors also use these engines), there is one plug in the temperature regulator housing. See Illustration 1.... On all 1100 and 3100 Series Engines (225 Excavators and 613 Tractors also use 3100 engines), there is one plug in the front cover on the right side behind the cover for temperature regulators. See Illustration 3.
Illustration 3: Location of drain plugs in front cover on 1100 and 3100 Series Engines.After all the coolant is drained, install all the drain plugs in their holes.