RETAINER-GEAR 4449617 - Caterpillar

Installation Of New Steel Core Flywheel Housing Gaskets
Before installing the gasket, existing sealant must be removed from the mating surfaces of the flywheel housing and cylinder block with 4C-4188 Paint Remover. Do not use a steel brush or rotary "Scotch Brite" pad to clean the surfaces. These may damage the contact surfaces. The previous gasket extended below the pan mounting surface and filled the entire block to flywheel housing joint. The 109-4318 and 113-1474 Flywheel Housing Gaskets with the steel core cannot be trimmed after assembly and is flush to recessed at the "Tee" joint between the block, flywheel housing, and oil pan. Seal the area not occupied with gasket material with 8T-9022 RTV Sealant (BLUE). This sealant is compatible with the gasket material. (For more complete instructions, see the Reference Article.)
Using the new 109-4318 or 113-1474 Flywheel Housing Gaskets on a flywheel housing originally designed for use with sealant may require elongation of the bolt holes in the pan, oil pan gasket, and stiffener plate (if equipped). The gasket is approximately 0.76 mm (.030 in) thick. Before engine operation, check the clearance between the flywheel housing and rear gear train and flywheel. Push the crankshaft towards the front of the engine when checking the flywheel to flywheel housing clearance. Flywheel housings designed for gaskets have a 16.76 mm (.660 in) dimension from the flywheel housing to the centerline of the oil pan mounting bolts. Flywheel housings designed for sealant have a 17.46 mm (0.688 in) dimension from the flywheel housing mounting face to the centerline of the oil pan mounting bolts. These housings are usually marked with the note "CAUTION: USE ONLY LIQUID GASKET ON BLOCK JOINT" on the inside of the housing.
Bolt Tightening Procedure For "20 Bolt" Flywheel Housings
Bolt identification for "20 Bolt" flywheel housings.1. Tighten bolts 1 through 20 in numerical sequence to a torque of 40 10 N m (30 7 lb ft).2. Tighten bolts 1 through 8 in numerical sequence to a torque of 135 20 N m (100 15 lb ft).3. Tighten bolts 9 through 20 in numerical sequence to a torque of 55 10 N m (40 7 lb ft).