ENGINE AR 2797865 - Caterpillar

Piston Cooling Tubes
Start By:a. remove oil pump 1. Turn the crankshaft until pistons are clear of the cooling tube to be removed.2. Remove screw (1) that holds the piston cooling tube. Remove the piston cooling tube.Install Piston Cooling Tubes
If the piston cooling jets are to be reused, check the alignment of the piston cooling jet tube with tooling (A). See Special Instructions, Form No. SMHS7267, for instructions on the use of the piston cooling jet alignment tool group.1. Put the cooling tube in position on the cylinder block and install the screw that holds the cooling tube to the block.2. Tighten the screw to a torque of 24 7 N m (18 5 lb ft).3. With the piston at the bottom of the bore, check the clearance between piston and cooling tube with a piece of wire (1) 0.63 mm (.025 in) thick. If the clearance is less than 0.63 mm (.025 in), make a replacement of the tube. The cooling tubes must fit evenly against the cylinder block. If they do not, it will cause an oil loss in the engine oil system.End By:a. install oil pump