Repair Piston Cooling Jets C6.4 Engine 323D Excavators

Service Repair Manual
Models
323D LN and 323D S Excavator

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Product: EXCAVATOR
Model: 323D S EXCAVATOR SED
Configuration: 323D LN & 323D S Excavators SED00001-UP (MACHINE) POWERED BY C6.4 Engine
Disassembly and Assembly
C6.4 Engine for Caterpillar Built Machines
Media Number -KENR8106-09 Publication Date -01/10/2017 Date Updated -18/10/2017
i04458588
Piston Cooling Jets - Remove and Install
SMCS - 1331-010
Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 6V-9120 Socket (1)
1
( 1 )
Tooling (A) is a 46 mm socket.
Start By:
A. Remove the oil pan. Refer to Disassembly and Assembly, "Engine Oil Pan - Remove".
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
1/3323D LN & 323D S Excavators SED00001-UP (MACHINE) POWERED BY C6.4 En...
2020/10/4https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...

Illustration 1 g01377622
1. Remove piston cooling jet (1) .
2. Remove gaskets (3) and jet (4) from valve (2) .
3. Use Tooling (A) in order to rotate the engine. Rotating the engine will allow access to the
remaining piston cooling jets (1) .
Installation Procedure
Table 2
Required Tools
A 6V-9120 Socket (1)
1
( 1 )
Tooling (A) is a 46 mm socket.
NOTICE

1. Install gaskets (3) and jet (4) onto valve (2) .
2. Install piston cooling jet (1) and tighten valve (2) to 34 ± 5 N·m (25 ± 4 lb ft).
3. Use Tooling (A) in order to rotate the engine. Rotating the engine will allow access to the
remaining piston cooling jets (1) .
End By: Install the oil pan. Refer to Disassembly and Assembly, "Engine Oil Pan - Install".
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Sun Oct 4 10:12:19 UTC+0800 2020

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Product: EXCAVATOR
i01138571
Pistons and Connecting Rods - Remove
SMCS - 1225-011
Removal Procedure
Table 1
Required Tools
A 8S-2269 Ridge Reamer 1
B 6V-9120 Socket(1)
1
(1)
Tool (B) is a 46 mm socket.
Start By:
a. Remove the cylinder head. Refer to Disassembly and Assembly, "Cylinder Head -
Remove".
b. Remove the engine oil pan. Refer to Disassembly and Assembly, "Engine Oil Pan - Remove
and Install".
c. Remove the oil supply tube. Refer to Disassembly and Assembly, "Crankshaft - Remove".
NOTICE

1. Use tool (A) to remove the wear ridge from the inner surface of the cylinder bore.
2. Rotate the engine at 90 degrees.
3. Use Tool (B) to rotate the crankshaft until two of the pistons are at the bottom center.
Remove four connecting rod nuts (1) from the connecting rod. Remove two connecting rod
caps (2). Put identification marks on the connecting rod, the connecting rod cap and the
connecting rod bearings. The identification marks must be on the bearing tab side for
installation purposes.
Note: Use tape or rubber tubing on connecting rod bolts in order to protect the crankshaft
journals. The sharp edges of the connecting rod bolts could damage the surface of the
crankshaft journals.
4. Push the piston and connecting rod (4) away from the crankshaft until the piston rings are
out of the cylinder liners. Remove the piston from cylinder block (3).
5. Keep the connecting rods and connecting rod caps together. Put an identification mark on
each piston in order to locate the piston in the cylinder block.
6. Repeat Steps 1 through 5 for removing the remaining pistons and connecting rods.
Sun Oct 4 10:13:19 UTC+0800 2020

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Product: EXCAVATOR
i01480856
Pistons and Connecting Rods - Disassemble
SMCS - 1225-015
Disassembly Procedure
Table 1
Required Tools
A 1P-1857 Retaining Ring Pliers 1
B 1U-6683 Ring Expander 1
C 1P-0510 Driver Group 1
Start By:
a. Remove the pistons and connecting rods. Refer to Disassembly and Assembly, "Pistons and
Connecting Rods - Remove".
NOTICE

1. Use Tool (A) to remove two retaining rings (1) from piston (4).
2. Remove piston pin (2) and connecting rod (3) from piston (4).
Note: Check the condition of the following parts: retaining rings (1), piston pin (2) and
piston (4). If these items are worn or damaged, use new parts for replacement.

3. Remove piston rings (5) from pistons (4) with tool (B).
Note: Check the condition of the piston rings. If the piston rings are worn or damaged, use
new parts for replacement.
4. Remove connecting rod bearing (6) and two bolts (7) from connecting rod (3).
Note: Check the condition of the following items: connecting rod bearing (6), connecting
rod bolt (7), piston pin bushing (8) and connecting rod (3). If the items are worn or
damaged, use new parts for replacement.

5. Use Tool (C) and a suitable press to remove piston pin bushing (8) from connecting rod (3).
Piston and Connecting Rod Assembly
(1) Retaining rings
(2) Piston pin
(3) Connecting rod
(4) Piston
(5) Piston rings
(6) Connecting rod bearing
(7) Connecting rod bolts
(8) Piston pin bushing
Sun Oct 4 10:14:18 UTC+0800 2020

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Product: EXCAVATOR
i02744439
Pistons and Connecting Rods - Assemble
SMCS - 1225-016
Assembly Procedure
Table 1
Required Tools
A 1P-1857 Retaining Ring Pliers 1
B 1U-6683 Ring Expander 1
C 1P-0510 Driver Group 1
NOTICE

Piston and Connecting Rod Assembly
1. If necessary, use Tooling (C) and a suitable press in order to install piston pin bearing (8)
into connecting rod (3).
Note: Align the oil holes in piston pin bearing (8) and connecting rod (3) when piston pin
bearing (8) is installed.
Note: If the clearance between piston pin (2) and piston pin bearing (8) is over 0.080 mm
(0.0031 inch), replace piston pin (2) or piston pin bearing (8) with a new part.

2. Install connecting rod (3) into piston (4). Ensure that the identification marks on connecting
rod (3) are on the same side as the marks on the top of the piston.
3. Lubricate piston pin (2) with clean engine oil and install piston pin (2) through piston (4)
and connecting rod (3). Use Tooling (A) in order to install retaining rings (1) on the end of
piston pin (2). Locate the ends of retaining rings (1) toward the bottom of piston (4).
Note: Ensure that piston pin (2) turns freely in piston pin bearing (8).

4. Install the oil control piston ring on the piston with tooling (B).
Note: The ends of spring (9) of the oil control piston ring should be assembled 180 degrees
from the oil ring end gap.
(X) Ends of spring for the oil control piston ring
(Y) Oil ring end gap
Note: Each piston ring (5) should be installed with the side Marked "R or T" (11) toward
the top of piston (4).
5. Use Tooling (B) in order to install the intermediate piston ring onto piston (4).

6. Use Tooling (B) in order to install the top piston ring onto piston (4).
Note: The gaps in the intermediate piston ring and the top piston ring should be separated
by 120 degrees.
Note: Check the clearance of the piston ring end gap for all the rings. Refer to
Specifications, "Piston and Rings".
End By:
a. Install the pistons and connecting rods. Refer to Disassembly and Assembly, "Pistons and
Connecting Rods - Install".
Sun Oct 4 10:15:17 UTC+0800 2020

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Product: EXCAVATOR
i02510046
Pistons and Connecting Rods - Install
SMCS - 1225-012
Table 1
Required Tools
A 1U-6684 Piston Ring Compressor 1
B 6V-9120 Socket(1)
1
(1)
Tool (B) is a 46 mm socket.
NOTICE
Note: Refer to Disassembly and Assembly, "Connecting Rod Bearings - Install" for the inspection
procedure of the connecting rod bearings and the crankshaft connecting rod journals.
1. Put clean engine oil on the crankshaft journals and on the inside of the cylinder bores. Put
clean engine oil on the piston rings and the connecting rod bearings.
2. Use Tooling (B) to rotate the crankshaft until the bearing journals are at the bottom center.
The bearing journals that are at the bottom center are for the piston installation.

(A) End gap for No. 1 ring (top compression ring)
(B) End gap for No. 2 ring (intermediate compression ring)
(C) End gap for oil control ring
(X) Camshaft side of engine block
(Y) Side of engine with combustion chamber
3. Move the piston rings on the pistons until the ring openings are separated by approximately
120 degrees.
4. Put the piston in the cylinder liner. Align the identification marks on the top of the piston to
the camshaft side of the cylinder block. Put Tooling (A) in position on the cylinder block
and compress the piston rings.
5. Align the piston and connecting rod with the crankshaft. Use a soft faced hammer to tap the
piston into the cylinder bore until Tool (A) comes off the piston.
Note: Ensure that Tooling (A) is installed correctly in order to allow the piston and the
connecting rod to easily slip into the cylinder block.

Note: Use tape or rubber tubing on connecting rod bolts to protect the crankshaft journals.
The sharp edges of the connecting rod bolts could damage the surface of the connecting rod
journal.
6. Before the connecting rod contacts the crankshaft, install the rod bearing upper half in the
respective connecting rod. Make sure that the bearing tab properly engages with the slot in
the connecting rod.
7. Place clean engine oil on the surface of the upper half of the connecting rod bearing. Guide
the connecting rod into position on the crankshaft.
8. Install the lower half of the connecting rod bearing in the correspondingly marked
connecting rod cap. Put clean engine oil on the surface of the lower half of the connecting
rod bearing and on the connecting rod bolts.
9. Install connecting rod cap (2) and connecting rod nuts (1). Tighten both of the nuts to a
torque of 103 ± 5 N·m (76 ± 4 lb ft).
10. Repeat Steps 1 through 9 for the remainder of the piston and connecting rods.
End By:
a. Install the oil supply tube. Refer to Disassembly and Assembly, "Crankshaft - Install".
b. Install the engine oil pan. Refer to Disassembly and Assembly, "Engine Oil Pan - Remove
and Install".
c. Install the cylinder head. Refer to Disassembly and Assembly, "Cylinder Head - Install".
Sun Oct 4 10:16:16 UTC+0800 2020

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Product: EXCAVATOR
i01650751
Connecting Rod Bearings - Remove
SMCS - 1219-011
Removal Procedure
Table 1
Required Tools
A 6V-9120 Socket(1)
1
(1)
Tool (A) is a 46 mm socket.
Start By:
a. Remove the engine oil pan. Refer to Disassembly and Assembly, "Engine Oil Pan - Remove
and Install".
b. Remove the oil supply tube. Refer to Disassembly and Assembly, "Crankshaft - Remove".
NOTICE

1. Use Tool (A) to rotate the crankshaft until two of the pistons are at the bottom center.
Remove connecting rod nuts (1) from the connecting rod. Remove connecting rod cap (2)
for one connecting rod.
2. Remove the lower half of the connecting rod bearing from connecting rod cap (2).
3. Remove the upper half of the connecting rod bearing from the connecting rod. Push the
connecting rod away from the crankshaft, if necessary.
Note: Use tape or rubber tubing on connecting rod bolts to protect the crankshaft journals.
The sharp edges of the connecting rod bolts could damage the crankshaft journals.
Note: Ensure that identification marks are on the connecting rod, the connecting rod cap
and the connecting rod bearing. The identification marks must be on the bearing tab side for
installation purposes.
4. Repeat Steps 1 through 3 for the remaining connecting rod bearings.
Sun Oct 4 10:17:16 UTC+0800 2020

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Product: EXCAVATOR
i01576846
Connecting Rod Bearings - Install
SMCS - 1219-012
Table 1
Required Tools
A 6V-9120 Socket(1)
1
(1)
Tool (A) is a 46 mm socket.
NOTICE
NOTICE
When the connecting rod caps are installed, ensure that the
identification marks are aligned.
Note: Refer to Specifications, "Connecting Rod Bearing Journal" for information on bearing
clearance checks.

1. Clean the bearing surface of connecting rod (5) and connecting rod cap (2). Ensure that the
number on connecting rod cap (2) matches the number on connecting rod (5).
2. Clean upper connecting rod bearing (4) and lubricate the bearing face with clean engine oil.
3. Clean lower connecting rod bearing (3) and lubricate the bearing face with clean engine oil.
Note: Align the tabs on the back of the connecting rod bearings with the tab grooves in the
connecting rod.
4. Use Tool (A) to rotate the crankshaft until two of the connecting rod journals are at the
bottom center. Install upper connecting rod bearing (4) in connecting rod (5).
5. Pull connecting rod (5) into position against the crankshaft.
6. Install lower connecting rod bearing (3) in connecting rod cap (2).
7. Put clean engine oil on the connecting rod bolts.

8. Install two nuts (1) on connecting rod cap (2). Tighten the connecting rod nuts to a torque of
103 ± 5 N·m (76 ± 4 lb ft).
9. Repeat Steps 1 through 8 for the installation of the remaining connecting rod bearings.
End By:
a. Install the oil supply tube. Refer to Disassembly and Assembly, "Crankshaft - Install".
b. Install the engine oil pan. Refer to Disassembly and Assembly, "Engine Oil Pan - Remove
and Install".
Sun Oct 4 10:18:15 UTC+0800 2020

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Product: EXCAVATOR
i03706683
Crankshaft Main Bearings - Remove
SMCS - 1203-011
Removal Procedure
Start By:
a. Remove the crankshaft. Refer to Disassembly and Assembly, "Crankshaft - Remove".
NOTICE

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1. Remove the main bearings (1) (upper shell) from the main bearing housing of the engine
cylinder block. The 3066 Engine has seven main bearings while the 3064 Engine has five
main bearings.
2. Remove thrust washers (2) from the cylinder block and from the rear main cap.
3. Remove the lower halves of the crankshaft main bearings (4) from the main bearing cap (3).
Note: Be careful not to damage the bearings. Mark each main bearing in order to ensure
installation in the original location.
Note: Check the condition of the crankshaft main bearings. Refer to the Guideline For
Reusable Parts, SEBF8009, "Main and Connecting Rod Bearings" or refer to the Guideline
For Reusable Parts, SEBV0544, "Engine Bearings and Crankshafts".
Note: Refer to the Specifications Module, "Main Bearing Journal" for more information on
crankshaft main bearings and the main bearing journals.
Sun Oct 4 10:19:14 UTC+0800 2020

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Product: EXCAVATOR
i01135299
Crankshaft Main Bearings - Install
SMCS - 1203-012
NOTICE
1. Install the upper halves of the crankshaft main bearings (1) in the main bearing housing of
the cylinder block.

Note: Ensure that the main bearing tab fits in the tab groove of the bearing housing of the
cylinder block.
2. Install thrust washers (2) into the cylinder block and the rear main cap.
Note: Install the thrust washers with the oil grooves toward the outside.
3. Install the lower halves of the crankshaft main bearings (4) into the crankshaft main bearing
caps (3).
Note: Ensure that the main bearing tab fits in the tab groove of the crankshaft main bearing
cap.
End By:
a. Install the crankshaft. Refer to Disassembly and Assembly, "Crankshaft - Install".
Sun Oct 4 10:20:14 UTC+0800 2020

Repair Piston Cooling Jets C6.4 Engine 323D Excavators

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