C7 On-Highway Engine Caterpillar

Pistons and Connecting Rods - Assemble

Usage:

C7 C7S

Assembly Procedure

Show/hide table

Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	4C-3601	Piston Ring Expander	1
B	1P-1861	Retaining Ring Pliers	1
C	5P-8639	Hydraulic Press (CONNECTING ROD BEARING)	1
	8F-0024	Hose As	1
	1P-2375	Quick Connect Coupler	1
	1P-2376	Quick Connect Coupler	1
	4C-9751	Spacer	1
	4C-9749	Bushing Adapter	1
	4C-9750	Bushing Adapter	1
	9U-6600	Hand Hydraulic Pump	1

Note: Prior to removal from the engine, the pistons and connecting rod assemblies were marked. The components must be reassembled together. The components must be installed in the original location in the engine. Do not interchange any of the components.

Show/hide table

NOTICE

Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life.

Show/hide table




Illustration 1	g01126305

Show/hide table




Illustration 2	g01126306

Use Tooling (C) to remove the old bearing and install the new bearing (6) at the same time. The adapter of Tooling (C) should make full contact with the surfaces of connecting rod (3).
Note: Orient the bearing joint within 12 ± 5 degrees of either Location (X).
1. Raise the temperature of connecting rod (3) along Length (Y).
  (Y) Maximum Length for heating the connecting rod ... 75 ± 5 mm (3.0 ± 0.2 inch)
2. Allow the connecting rod and the bearing to cool to room temperature.
Show/hide table

Illustration 3 g01261975
Use the following procedure to install piston rings (4).
1. Position the spring for the oil control ring in the oil ring groove in the piston body assembly.
2. Position the oil control ring over the spring. Position the oil control ring so that the gap is 180 degrees from the joint in the spring. Use Tooling (A) to install the oil control ring on the piston.
3. Use Tooling (A) to install the intermediate piston ring with the side that has the identification “UP-2” toward the top of the piston.
4. Use Tooling (A) to install the top piston ring with the side that has the identification “UP-1” toward the top of the piston.
5. Position piston rings (4) so the gaps are 120 degrees from each other.
Check the clearance between the ends of piston rings (4). Refer to Specifications, "Piston And Rings".
Position piston (1) on connecting rod (3). Apply clean engine oil to piston pin (5) and install the piston pin. Use Tooling (B) to install retaining ring (2). Make sure that the retaining rings are fully seated in the grooves of the piston assembly.