Caterpillar Cat 323D L Excavator (Prefix NZF) Service Repair Manual (NZF00001 and up).pdf

Service Repair Manual
Models
323D L Excavator

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Product: EXCAVATOR
Model: 323D L EXCAVATOR NZF
Configuration: 323D L Excavator NZF00001-UP (MACHINE) POWERED BY C6.6 Engine
Disassembly and Assembly
C6.6 Engines for Caterpillar Built Machines
Media Number -KENR6081-15 Publication Date -01/03/2014 Date Updated -04/03/2014
i06960581
Inlet and Exhaust Valve Springs - Remove and Install
SMCS - 1108-010
Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-1860 Retaining Ring Pliers 1
B
9U-6193 Valve Spring Compressor 1
416-0288 Adapter 1
416-0292 Head 1
C(1)
9U-6198 Crankshaft Turning Tool 1
C(2)
9U-7336 Housing 1
5P-7305 Engine Turning Tool 1
(1)
The Crankshaft Turning Tool is used on the front pulley.
(2)
This Tool is used in the aperture for the electric starting motor.
Start By:
a. Remove the rocker shaft assembly. Refer to Disassembly and Assembly, "Rocker Shaft and
Pushrod - Remove" for the correct procedure.
Note: Either Tooling (C) can be used. Use the Tooling that is most suitable.
NOTICE
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Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
Note: The following procedure should be adopted to remove the valve springs when the cylinder
head is installed to the engine. Refer to Disassembly and Assembly, "Inlet and Exhaust Valves -
Remove and Install" for the procedure to remove the valve springs from a cylinder head that has
been removed from the engine.
Note: Ensure that the appropriate piston is at top dead center before the valve spring is removed.
Failure to ensure that the piston is at top dead center may allow the valve to drop into the cylinder
bore.
Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
NOTICE
Plug the apertures for the push rods in the cylinder head to prevent the
entry of loose parts into the engine.
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Illustration 1 g01335929
1. Follow Steps 1.a through 1.h to remove the harness assemblies for the electronic unit
injectors.
a. Place a temporary identification mark on connections (1) for harness assembly (4) for
electronic unit injectors (2).
b. Use a deep socket to remove connections (1) from electronic unit injectors (2).
c. Cut the cable straps (3).
d. Disconnect plug (7) from harness assembly (4).
e. Use Tooling (A) to remove circlip (5).
f. From the outside of valve mechanism cover base (8), push harness assembly (4)
inward. Withdraw the harness assembly from the valve mechanism cover base.
g. Remove O-ring seal (6) from harness assembly (4).
h. Repeat Steps 1.a through 1.g to remove the remaining harness assemblies.
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NOTICE
Ensure that the valve spring is compressed squarely or damage to the
valve stem may occur.
2. Follow Steps 2.a through 2.d to position the appropriate piston at top dead center.
a. Install Tooling (B) in position on the cylinder head to compress a valve spring (11)
for the appropriate piston.
b. Use Tooling (B) to compress valve spring (11) and open the valve slightly.
Note: Do not compress the spring so that the valve spring retainer (10) touches the
valve stem seal.
c. Use Tooling (C) to rotate the crankshaft carefully, until the piston touches the valve.
Note: Not use excessive force to turn the crankshaft. The use of force can result in
bent valve stems.
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d. Continue to rotate the crankshaft and gradually release the pressure on Tooling (B)
until the piston is at the top dead center position. The valve is now held in a position
that allows the valve spring to be safely removed.
Note: Valve springs must be replaced in pairs for the inlet valve or the exhaust valve of
each cylinder. If all valve springs require replacement the procedure can be carried out on
two cylinders at the same time. The procedure can be carried out on the following pairs of
cylinders. 1 with 6, 2 with 5 and 3 with 4. Ensure that all the valve springs are installed
before changing from one pair of cylinders to another pair of cylinders.
NOTICE
Do not turn the crankshaft while the valve springs are removed.
3. Apply sufficient pressure to Tooling (B) to allow removal of valve keepers (8).
Note: Do not compress the spring so that valve spring retainer (9) touches the valve stem
seal.
Remove valve keepers (9).
4. Slowly release pressure on Tooling (B).
5. Remove valve spring retainer (10) and remove valve spring (11).
6. If necessary, remove the valve stem seals.
7. Repeat Steps 3 through 6 to remove the remaining valve springs from the appropriate
cylinder.
8. Remove Tooling (B).
Installation Procedure
Table 2
Required Tools
A 1P-1860 Retaining Ring Pliers 1
B
416-0288 Adapter 1
416-0292 Head 1
C(1)
9U-6198 Crankshaft Turning Tool 1
C(2)
9U-7336 Housing 1
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5P-7305 Engine Turning Tool 1
D 1U-6396 O-Ring Assembly Compound 1
E 247-5377 Torque Wrench 1
(1)
The Crankshaft Turning Tool is used on the front pulley.
(2)
This Tool is used in the aperture for the electric starting motor.
Note: Either Tooling (C) can be used. Use the Tooling that is most suitable.
NOTICE
NOTICE
Do not turn the crankshaft while the valve springs are removed.
NOTICE
Plug the apertures for the push rods in the cylinder head to prevent the
entry of loose parts into the engine.
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1. Inspect valve springs (11) for damage and for the correct length. Refer to Specifications,
"Cylinder Head Valves" for the correct procedure.
2. If necessary, install a new valve stem seal onto the valve guide.
Note: The outer face of the valve guide must be clean and dry before installing the valve
stem seal.
3. Install valve spring (11) onto the cylinder head. Position valve spring retainer (10) on valve
spring (11).
Improper assembly of parts that are spring loaded can cause bodily
injury.
To prevent possible injury, follow the established assembly procedure
and wear protective equipment.
NOTICE
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4. Install Tooling (B) in the appropriate position on the cylinder head to compress valve spring
(11).
5. Apply sufficient pressure to Tooling (B) to install valve keepers (9).
Note: Do not compress the spring so that valve spring retainer (10) touches the valve stem
seal.
Install the valve spring keepers.
6. Carefully release the pressure on Tooling (B).
7. Repeat steps 2 to 6 for the remaining valves.
The valve spring keepers can be thrown from the valve when the valve
spring compressor is released. Ensure that the valve spring keepers are
properly installed on the valve stem. To help prevent personal injury,
keep away from the front of the valve spring keepers and valve springs
during the installation of the valves.
8. Remove Tooling (B).
9. Use Tooling (C) to rotate the crankshaft through approximately 45 degrees. Rotate the
crankshaft through approximately 45 degrees will ensure that the appropriate valve is clear
of the piston. Lightly strike the top of the valve with a soft hammer to ensure that valve
keepers (9) are properly installed.
Note: If all valve springs require replacement the procedure can be carried out on two
cylinders at the same time. The procedure can be carried out on the following cylinders. 1
and 6, 2 and 5 and 3 and 4. Remember that the crankshaft must not be turned while the
valve springs are removed. Ensure that all the valve springs are installed before changing
from one pair of cylinders to the other pair of cylinders. If all valve springs do not require
replacement, the springs must be replaced in pairs.
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10. Follow Steps 10.a through 10.g to install the harness assemblies for the electronic unit
injectors.
a. Ensure that harness assembly (4) for the electronic unit injectors and the bore in valve
mechanism cover base (8) are clean and free from damage. Replace any damaged
components.
b. Use Tooling (D) to lubricate a new O-ring seal. Install new O-ring seal (6) onto
harness assembly (4) for the electronic unit injectors.
c. Install harness assembly (4) into valve mechanism cover base (8) from inside the
valve mechanism cover base.
d. Use Tooling (A) to install circlip (5).
e. Connect plug (7) to harness assembly (4) for the electronic unit injectors.
f. Use a deep socket to install connections (1) to electronic unit injectors (2). Use
Tooling (E) to tighten the connections to a torque of 2.4 N·m (21 lb in).
g. Install a new cable strap (3).
Note: Ensure that cable straps meet Original Equipment Manufacturer (OEM)
specification are used.
h. Repeat Steps 10.a through 10.g for the remaining harness assemblies.
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End By:
a. Install the rocker shaft assembly. Refer to Disassembly and Assembly, "Rocker Shaft and
Pushrod - Install" for the correct procedure.
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Fri Aug 28 09:25:39 UTC+0800 2020
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323D L Excavator NZF00001-UP (MACHINE) POWERED BY C6.6 Engine(SEBP...
2020/8/28

Shutdown SIS
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Product: EXCAVATOR
i06907987
Inlet and Exhaust Valves - Remove and Install
SMCS - 1105-010
Removal Procedure
Table 1
Required Tools
A
416-0292 Adapter 1
416-0288 Head 1
Start By:
a. Remove the cylinder head. Refer to Disassembly and Assembly, "Cylinder Head - Remove"
for the correct procedure.
NOTICE
1. Clean the bottom mating surface of the cylinder head. Check the depth of the valves below
the face of the cylinder head before the valve springs are removed. Refer to Specifications,
"Cylinder Head Valves" for the correct dimensions.
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2. Place a temporary identification mark on the heads of the valves to identify the correct
position.
Note: Inlet valves have a recess in the center of the head.
3. Use a suitable lifting device to position the cylinder head with the valve springs upward.
The weight of the cylinder head is approximately 65 kg (143 lb).
Note: Ensure that the cylinder head is kept on a clean, soft surface to prevent damage to the
machined face.
Typical example
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4. Install Tooling (A) in position on the cylinder head to compress appropriate valve spring
(3).
NOTICE
5. Apply sufficient pressure to Tooling (A) to remove valve keepers (1).
Note: Do not compress the spring so that valve spring retainer (2) touches valve stem seal
(4).
6. Slowly release pressure on Tooling (A).
7. Remove valve spring retainer (2). Remove valve spring (3).
9. Remove Tooling (A).
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10. Remove valve stem seals (4).
11. Use a suitable lifting device to carefully turn over the cylinder head.
12. Remove valves (5).
Table 2
Required Tools
A
416-0292 Adapter 1
416-0288 Head 1
NOTICE
1. Clean all components of the cylinder head assembly. Ensure that all ports, all coolant
passages, and all lubrication passages in the cylinder head are free from debris. Follow
Steps 1.a through 1.d to inspect the components of the cylinder head assembly. Replace any
components that are worn or damaged.
a. Inspect the cylinder head for wear and for damage. Refer to System Operation,
Testing and Adjusting, "Cylinder Head Inspect".
b. Inspect the valve seats for wear and for damage. Refer to Specifications, "Cylinder
Head Valves" for further information.
c. Inspect the valve guides for wear and for damage. Refer to Specifications, "Cylinder
Head Valves" and System Operation, Testing and Adjusting, "Valve Guide - Inspect"
for further information.
d. Inspect the valves for wear and for damage. Refer to Specifications, "Cylinder Head
Valves" for the correct procedure.
e. Inspect valve springs (3) for damage and for the correct length. Refer to
Specifications, "Cylinder Head Valves" for the correct procedure.
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2. Lubricate the stems of valves (5) with clean engine oil. Install valves (5) in the appropriate
positions in the cylinder head. Check the depth of the valves below the face of the cylinder
head. Refer to System Operation, Testing and Adjusting, "Valve Depth - Inspect" for more
information.
3. Use a suitable lifting device to carefully turn over the cylinder head. The weight of the
cylinder head is approximately 65 kg (143 lb).
Note: Ensure that all the valves remain in place.
4. Install new valve stem seals (4) onto each of the valve guides.
Note: The outer face of the valve guides must be clean and dry before installing valve stem
seals (4).
5. Install valve spring (3) onto the cylinder head. Position valve spring retainer (2) on valve
spring (3).
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6. Install Tooling (A) in the appropriate position on the cylinder head to compress valve spring
(3).
NOTICE
7. Apply sufficient pressure to Tooling (A) to install valve keepers (1).
Note: Do not compress the spring so that valve spring retainer (2) touches valve stem seal
(4).
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The valve spring keepers can be thrown from the valve when the valve
spring compressor is released. Ensure that the valve spring keepers are
properly installed on the valve stem. To help prevent personal injury,
keep away from the front of the valve spring keepers and valve springs
during the installation of the valves.
8. Carefully release the pressure on Tooling (A).
10. Remove Tooling (A) from the cylinder head.
11. Use a suitable lifting device to position the cylinder head on a support. Ensure that the heads
of the valves are not obstructed. Gently strike the top of the valves with a soft hammer to
ensure that valve keepers (1) are properly installed.
End By:
a. Install the cylinder head. Refer to Disassembly and Assembly, "Cylinder Head - Install" for
the correct procedure.
Fri Aug 28 09:26:38 UTC+0800 2020
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Shutdown SIS
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Product: EXCAVATOR
i02786717
Engine Oil Filter Base - Remove and Install
SMCS - 1306-010
Removal Procedure
Table 1
Required Tools
A - Strap Wrench 1
Note: The oil filter can be installed vertically or the oil filter can be installed horizontally.
NOTICE
NOTICE
Care must be taken to ensure that fluids are contained during
performance of inspection, maintenance, testing, adjusting and repair
of the product. Be prepared to collect the fluid with suitable containers
before opening any compartment or disassembling any component
containing fluids.
Dispose of all fluids according to local regulations and mandates.
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1. Place a suitable container below engine oil filter base (3) in order to catch any oil that might
be spilled.
Typical example
2. If the engine oil filter base has a horizontal engine oil filter, follow Steps 2.a to 2.b in order
to drain the engine oil filter.
a. Remove drain plug (6) from engine oil filter base (2).
b. Remove O-ring seal (5) from drain plug (6).
3. Use Tooling (A) to remove engine oil filter (3). Refer to Operation and Maintenance
Manual, "Engine Oil and Filter - Change".
4. Remove bolts (4). If bolts of different lengths are installed, identify the correct position of
the bolts.
Note: If necessary, remove the spacers and slide the bracket for the wiring loom to one side.
5. Remove engine oil filter base (2).
6. Remove joint (1).
7. If necessary, remove plug (8) from engine oil filter base (2). Remove O-ring seal (7) from
plug (8).
NOTICE
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Typical example
1. Clean engine oil filter base (2). Clean the mating surfaces of the cylinder block or the
engine oil cooler.
2. If necessary, install new O-ring seals (5) and (7) to plugs (6) and (8). Install plugs (6) and
(8) to engine oil filter base (2). Tighten the plugs to a torque of 12 N·m (106 lb in).
Note: Drain plug (6) is only installed to engines with a horizontal engine oil filter.
3. Install bolts (4) to engine oil filter base (2). Ensure that bolts of different lengths are
installed in the correct positions.
Note: If necessary, install the spacers and the bracket for the wiring loom.
4. Install a new joint (1) onto bolts (4). Install the assembly of the engine oil filter base to the
cylinder block or the engine oil cooler.
5. Tighten bolts (4) to a torque of 22 N·m (16 lb ft).
6. Install a new engine oil filter (3) and check the level of the engine lubricating oil. Refer to
Operation and Maintenance Manual, "Engine Oil Level - Check" for the correct procedure.
Fri Aug 28 09:27:37 UTC+0800 2020
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Shutdown SIS
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Product: EXCAVATOR
i02786723
Engine Oil Cooler - Remove - Engine Oil Cooler with a High
Mounted Filter Base
SMCS - 1378-011
Removal Procedure
Start By:
a. Remove the bracket for the Electronic Control Module. Refer to Disassembly and
Assembly, "ECM Mounting Bracket - Remove and Install".
NOTICE
Ensure that all adjustments and repairs that are carried out to the fuel
system are performed by authorised personnel that have the correct
training.
Before begining ANY work on the fuel system, refer to Operation and
Maintenance Manual, "General Hazard Information and High
Pressure Fuel Lines" for safety information.
Refer to System Operation, Testing and Adjusting, "Cleanliness of
Fuel System Components" for detailed information on the standards of
cleanliness that must be observed during ALL work on the fuel system.
NOTICE
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NOTICE
containing fluids.
1. Drain the coolant from the cooling system into a suitable container. Refer to Operation and
Maintenance Manual, "Cooling System Coolant - Change" for the correct procedure.
Typical example
2. If the engine has a left hand side oil filter, remove the oil filter base. Refer to Disassembly
and Assembly, "Oil Filter Base - Remove and Install".
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3. Make temporary identification marks on plastic tube assemblies (2) in order to show the
correct position of the tube assemblies.
4. Remove plastic tube assemblies (2). Plug all plastic tube assemblies with new plugs. Cap all
open ports with new caps.
5. Follow Steps 5.a through 5.d in order to disconnect the engine wiring harness (3).
a. Disconnect engine wiring harness (3) from position sensor (1) for the fuel injection
pump.
b. Disconnect engine wiring harness (3) from the solenoid for the fuel injection pump.
c. Disconnect engine wiring harness (3) from oil pressure sensor (8).
d. Cut the cable straps that secure engine wiring harness (3) to the assembly of oil cooler
(4). Position the harness away from the assembly of the oil cooler.
6. Remove tube assembly (6) for the fuel return from the cylinder head and from transfer
pump (5). Plug the tube assembly with new plugs. Cap all open ports with new caps.
Typical example
7. If necessary, loosen bolts (7). Remove bolts (7) and remove brackets for the tube
assemblies. Remove the assembly of oil cooler (4) from the cylinder block.
Note: The bolts are different lengths. Note the position of the different bolts. Note the
location and the orientation of the brackets for the tube assemblies.
8. Remove joint (8). Refer to Illustration 3.
Disassembly Procedure (Engine Oil Cooler with a High
Mounted Filter Base)
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1. Remove nuts (12) from the assembly of oil cooler (6).
2. Remove cooler matrix (9) from housing (11).
3. Remove joints (10).
Fri Aug 28 09:28:37 UTC+0800 2020
4/4
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Shutdown SIS
Previous Screen
Product: EXCAVATOR
i02786720
Engine Oil Cooler - Remove - Engine Oil Cooler with a Low
Mounted Filter Base
SMCS - 1378-011
Removal Procedure
Start By:
a. Remove the bracket for the Electronic Control Module. Refer to Disassembly and
Assembly, "ECM Mounting Bracket - Remove and Install".
NOTICE
Ensure that all adjustments and repairs that are carried out to the fuel
system are performed by authorised personnel that have the correct
training.
Before begining ANY work on the fuel system, refer to Operation and
Maintenance Manual, "General Hazard Information and High
Pressure Fuel Lines" for safety information.
Refer to System Operation, Testing and Adjusting, "Cleanliness of
Fuel System Components" for detailed information on the standards of
cleanliness that must be observed during ALL work on the fuel system.
NOTICE
1/4
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NOTICE
containing fluids.
1. Drain the coolant from the cooling system into a suitable container. Refer to Operation and
Maintenance Manual, "Cooling System Coolant - Drain" for the correct procedure.
Typical example of an engine oil cooler with a blanking plate
2. If the engine has a left hand side oil filter, remove the oil filter base. Refer to Disassembly
and Assembly, "Oil Filter Base - Remove and Install".
2/4
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Caterpillar Cat 323D L Excavator (Prefix NZF) Service Repair Manual (NZF00001 and up).pdf

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