SERVICE PROGRAM

SERVICE PROGRAMSP 2-201-001NOVEMBER 2007STEP 6: Remove the serpentine fan belt●●●To facilitate the correct re-installation ofthe serpentine belt, note the routing of theserpentine belt on the engine.Using a 1/2” drive ratchet, loosen thetension on the serpentine belt. Insert theratchet drive in the belt tensioner and pullthe tensioner toward the right side of thetruck.Remove the serpentine belt from the truck.STEP 7: OBJECTIVE:Adjust the fan ring so that it isconcentrically (center to center) alignedwith the fan (if necessary)TOLERANCE:Minimum of 1/8” space between the end ofall fan blades and the inside of the fan ringMETHODOLOGY:● Rotate the fan, checking for at least 1/8”of clearance between the ends of the fanblades and the inside of the fan ring (asmeasured at the 3, 6, 9, and 12 o’clockpositions).● If tolerance is less than 1/8” at the 3, 6, 9,and 12 o’clock positions (or not equal at allfour positions), loosen the (4) fan bracketto engine / fan clutch fasteners using anappropriately sized box wrench (Figure 4).NOTE:See Table 1 for a list of wrench sizes andtheir respective fan ring bracket to engine /fan clutch fasteners.Figure 4(2) additional fastenerslocated at bottom of engine●Move the fan ring / bracket assembly(vertically and/or horizontally, as required) toachieve a minimum of 1/8” space betweenthe end of all blades and the inside of thefan ring.Table 1EngineWrench size for UPPERhex head cap screwsWrench size for LOWERhex head cap screwsISM 13mm 16mmISL 16mm 15mmISC 16mm 15mmNOTE:A pry bar may be used to provide additionalleverage to move the fan ring / bracketassembly.● Rotate the fan, checking for at least 1/8”of clearance between the ends of the fanblades and the inside of the fan ring (asmeasured at the 3, 6, 9, and 12 o’clockpositions).● Apply thread locking compound to the fanbracket fasteners. Using an appropriatelysized box wrench, tighten the (4) fan ringbracket to engine / fan clutch fasteners.14 of 22AC-SP-263-0711-P28Questions? Visit the Autocar website atwww.autocartruck.com and click the Web Link Directicon to request emergency service assistance.