One New Aftermarket Replacement Heat Start Switch Group Fits Caterpillar (Fits CAT) ExcavatorsThis 6-terminal ignition starter switch (Switch Gp-Heat Start) is the key switch assembly used to start and stop the engine on Fits Caterpillar (Fits CAT) mini hydraulic and full-size excavators. Rated at 24 volts, it includes two keys (key part number 5P8500) and is a direct replacement Fits Caterpillar OEM part number 7Y3918.Specifications Type: Heat Start Switch Group (Ignition Starter Switch) Terminals: 6 Voltage: 24 Volt Includes: 2 Keys (5P8500) Compatible ModelsFits Caterpillar Mini Hydraulic Excavators: 307, 307B, 307C, 308CFits Caterpillar Excavators: 307, 307-A, 311, 311C, 312, 312B, 312B L, 313B, 314C, 315, 315B L, 317, 317B LN, 318B, 320, 320-A, 320 L, 320N, 321C, 325CReplaces Part Number(s):7Y3918, 7Y-3918Aftermarket Interchange NumbersCA7Y-3918, 1411-52, 141152, ELT20-0033New aftermarket replacement part - not remanufactured, not used.