The 4G15, 63, 64, and 6G72 engines are used in various models of forklift trucks, including GP15-35, GP15K-35K, GP40, GPL40, GC15-30, GC15K-30K, and GC30K-70K. To ensure proper maintenance and repair, a comprehensive service manual is available from Caterpillar Cat under the part number 99719-34130.
