Direct Fit Bolt-On Engine Cooling Fan Blade 11 Blades 1-13660345-0 8-97161599-0 Isuzu 4BG1 Excavator Fleet Maintenance Part Describe: This Direct Fit Bolt-On 11-Blade Engine Cooling Fan is designed for fast, hassle-free fleet maintenance on excavators powered by the Isuzu 4BG1 and 4BG1T engines. With an exact OEM-matching 4-hole flange pattern and 550mm outer diameter, installation is a straightforward bolt-on procedure requiring no modifications, spacers, or adapters — most