Ignition Switch w/ Key Fits Caterpillar 140 141 143 153 163 4 4A 4P 4SOne New Aftermarket Replacement Ignition Switch w Key Fits Caterpillar Track Type Loader Models: 140, 141, 143, 153, 163, 4, 4A, 4P, 4S, 5, 54, 55, 56, 56H, 57, 57H, 5A, 5P, 5S, 6, 6A, 6S, 6SU, 7, 7A, 7S, 7S, LGP, 7SU, 7U, 8, 8A, 8SU, 8U, D1, D10, D2, D3, D3C, III, D3G, D3K, LGP, D3K, XL, D3K2, LGP, D3K2, XL, D4C, III, D4D, D4E, D4E, SR, D4G, D4H, D4H, III, D4H, XL, D4K, LGP, D4K, XL, D4K2, LGP, D4K2, XL, D5, D5B, D5C, III, D5E, D5G, D5H, D5H, XL,