LINES GP-FUEL INJECTION 7N4016 - Caterpillar

Piston Cooling Tubes
Start By:a. remove oil pump1. Use Tool (A) to 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.
Do not remove the adapters for the No. 1 and No. 12 piston cooling tubes on engines with Serial Numbers 38S1 through 38S890. The engine cylinder blocks that use the adapters are identified by a 10-24 threaded screw hole next to the piston cooling tube mounting hole.
Install Piston Cooling Tube
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) 0.62 mm (.025 in) thick. If the clearance is less than 0.63 mm (.25 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