OTC 6974 Fan Clutch Wrench for Ford 6.0L Diesel This is a required tool to tighten or loosen the fan clutch on the water pump Applications 2003-newer Ford F-550 and F-650 Super-Duty trucks with the 6.0L diesel engine Similar to Ford No. 303-774 Set consists of the spacer adapter and shoulder bolts only for use with your No. 518 or No. 6930 flange-type puller