SPRAY AR-WATER 1191043 - Caterpillar

Inlet Valves And Seats
If inlet valve seats show sign of slight nicks or scratches, they can be redressed with a fine piece of emery cloth or by lapping with a lapping stone, grinding compound and grinding tool. If the seats are excessively damaged to the extent that they cannot be reclaimed, they should be replaced. The dimension from the top of the cylinder block to the inlet valve seat should not exceed .113 in. (2.870 mm) not be less than .101 in. (2.565 mm).Slightly worn or scratched inlet valves can be reclaimed by lapping them on a piece of fine crocus cloth on a flat surface, but it is suggested that new inlet valves be installed.Assembly
Installing Cylinder Block
Position cylinder block gasket and block on crankcase according to markings made prior to disassembly. Using cap screws with lockwashers, secure cylinder block to crankcase at 220 to 250 inch pounds.Installing Crankshaft
If the crankshaft is fitted with oil seal rings, install rings. Position ball bearings and crankshaft in crankcase making sure the drive end of the crankshaft is positioned as marked before disassembly.If one end of the crankcase is counterbored for holding a bearing, be sure the crankshaft is installed through the correct end of the crankcase.Carefully press crankshaft and bearings into crankcase using arbor press.Position a rear end cover gasket, when used, over the rear end of the crankcase, making sure the oil hole in the gasket lines up with the oil hole in the crankcase. Position the end cover oil seal ring, if used, in the groove in the end cover boss. The end cover should be positioned correctly in relation to the oil holes in the gasket and crankcase. As the end cover is positioned, the oil seal ring must be compressed as it is positioned in the crankshaft. Secure end cover to crankcase with cap screws and lock washers.If the opposite end cover requires an oil seal which was removed on disassembly, a new seal should be pressed into end cover. Position new end cover gasket and carefully install end cover over crankshaft and to crankcase avoiding damage to the seal. Secure end cover with cap screw and lock washers (220-250 inch pounds).Installing Pistons And Connecting Rods
If new wrist pin bushings are to be used, they should be pressed into the connecting rods so that the oil hole in the bushing lines up with the one in the rod. The new bushings should then be reamed or honed to provide between .0002 in. (.005 mm) and .0007 in. (.018 mm) clearance on the wrist pin. Position connecting rod in piston and press in wrist pin so that lockwire hole in the pin aligns with that of the piston. Install new lockwire through piston and wrist pin and lock same by snapping short end into lockwire hole at the bottom of the piston (Fig. 3). Teflon plugs in wrist pin ends may be used instead of the lockwires (Fig. 3).Install piston rings in correct location with ring pip