42. Piston and Connecting Rod Assemble
Piston and Connecting Rod Assemble- Tools Required
- J24086-C Piston Pin Remover and Installer Set
Important: Assemble the piston for the specific cylinder with the connecting rod for the corresponding crankshaft journal.
1. Install the fork insert J24086-310 into fixture J24086-10.
2. Lubricate the piston pin with clean engine oil.
Important: Ensure that the marks on the piston and connecting rod are aligned the same as when removed. If installing a new piston, ensure that the arrow on top faces towards the front of the engine. If no identification marks were made during disassembly, ensure that the flat area on the bottom of the piston pin skirt is aligned with the small dimple above the connecting rod crankshaft bearing bore.
3. Assemble the piston, connecting rod and adapter J24086-6A and install onto fixture J24086-10.
4. Adjust installation pin J24086-9 to M-0.
Notice: After the installer hub bottoms on the support assembly, do not exceed 35 000 kPa (5,000 psi) pressure, this could cause damage to the tool.
5. Insert pin J24086-9 through fixture J24086-10 and to the piston pin.
6. Press pin J24086-9 until the install bottoms on fixture J24086-10.
Important: When installing the piston rings onto the piston, use a ring expander plier type tool. Do not roll the piston rings into the grooves of the piston. Use caution and care to expand the piston rings only slightly larger than the Outside Diameter (OD) of the piston.
7. Using piston ring pliers, install the piston rings onto the piston.
7.1. Install the oil control ring spacer in the groove.
7.2. Install the lower oil control ring. The oil control rings do not have a dimple or orientation mark and may be installed in either direction.
7.3. Install the upper oil control ring.
7.4. Stagger the three oil control ring end gaps a minimum of 90 degrees.
7.5. Using piston ring pliers, install the lower compression ring.
The lower compression ring is chamfered and is 1.5 mm (0.06 inch) thick. The chamfer (the thickest side of the compression ring) faces towards the bottom of the piston.
7.6. Using piston ring pliers, install the upper compression ring. The upper compression ring is chrome and is 1.2 mm (0.05 inch) thick.