C3.4B Engines For Caterpillar Built Machines Caterpillar

Illustration 1	g02490436
Typical example

(1) Tighten the bolt to the following torque. ... 18 N·m (13 lb ft)

Piston Cooling Jet Alignment

Illustration 2	g01352578
(2) Piston cooling jet (3) Rod (4) Cylinder block

Use the following procedure in order to check the alignment of the piston cooling jet.

1. Insert rod (3) into the end of the piston cooling jet (2). Rod (3) has a diameter of 1.70 mm (0.067 inch). Rod (3) must protrude out of the top of the cylinder block.

2. Dimension (A) is 50.75 mm (1.9980 inch) and dimension (B) is 9.35 mm (0.3681 inch). Dimension (A) and dimension (B) are tangential to the cylinder bore (4).

3. The position of the rod (3) must be within dimension (C). Dimension (C) is 14 mm (0.5512 inch).

Note: Ensure that the rod (3) cannot damage the piston cooling jet when the alignment is checked. The piston cooling jets cannot be adjusted. If a piston cooling jet is not in alignment, the piston cooling jet must be replaced.