Caterpillar Cat 325C EXCAVATOR (Prefix S2C) Service Repair Manual Instant Download.pdf

Service Repair Manual
Models
325C EXCAVATOR

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Product: EXCAVATOR
Model: 325C EXCAVATOR S2C
Configuration: 325C Material Handler S2C00001-UP (MACHINE) POWERED BY 3126 Engine
Disassembly and Assembly
3126B Engines for Caterpillar Built Machines
Media Number -SENR9581-06 Publication Date -01/08/2018 Date Updated -17/08/2018
i02374873
Inlet and Exhaust Valves - Remove and Install
SMCS - 1105-010
Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 5S-1330 Valve Spring Compressor 1
Start By:
a. Remove the cylinder head assembly. Refer to Disassembly and Assembly, "Cylinder Head -
Remove".
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
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325C Material Handler S2C00001-UP (MACHINE) POWERED BY 3126 Engine(SE...
2020/7/7
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisw...

Illustration 1 g00991548
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.
1. Use Tooling (A) to compress valve spring (4). Remove retainer lock (6).
2. Remove Tooling (A). Remove spring retainer (5), valve spring (4), and washer (3).
3. Remove valve seal (1) and valve (2).
4. Repeat Steps 1 through 3 in order to remove the remaining inlet valves and exhaust valves.
Installation Procedure
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Table 2
Required Tools
A 5S-1330 Valve Spring Compressor 1
NOTICE
The valve spring keepers can be thrown from the valve when the valve
spring compressor is released. Ensure that the valve spring keepers are
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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.
1. Lubricate valve (2) with clean engine oil. Install valve (2) in the cylinder head assembly.
Install new valve seal (1) onto the valve guide.
2. Place the following items on the valve stem: washer (3), valve spring (4) and spring retainer
(5).
Note: A small amount of grease can be used to hold the retainer locks in position during
installation.
3. Use Tooling (A) to compress valve spring (4). Install retainer lock (6).
4. Repeat Steps 1 through 3 in order to install the remaining inlet valves and exhaust valves.
End By:
a. Install the cylinder head assembly. Refer to Disassembly and Assembly, "Cylinder Head -
Install".
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Tue Jul 7 07:31:25 UTC+0800 2020
4/4
2020/7/7

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Product: EXCAVATOR
i01979506
Inlet and Exhaust Valve Guides - Remove and Install
SMCS - 1104-010
Removal Procedure
Table 1
Required Tools
A 1U-7793 Valve Guide Driver 1
B 9U-6895 Valve Guide Driver 1
Start By:
a. Remove the inlet and exhaust valves. Refer to Disassembly and Assembly, "Inlet and
Exhaust Valves - Remove and Install".
NOTICE
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1. Use Tooling (A) to remove inlet valve guides (2) from the cylinder head assembly. Use
Tooling (B) to remove exhaust valve guides (1) from the cylinder head assembly.
Table 2
Required Tools
A 1U-7793 Valve Guide Driver 1
B 9U-6895 Valve Guide Driver 1
C 1U-7792 Guide Collar 1
D 149-4008 Guide Collar 1
NOTICE
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1. Position inlet valve guide (2) and tap on the top of inlet valve guide (2).
2. Use Tooling (A) and Tooling (C) to install inlet valve guide (2). Install inlet valve guides
(2) until the protrusion is 23.0 ± 0.5 mm (0.90 ± 0.02 inch) above the cylinder head
assembly.
3. Use Tooling (B) and Tooling (D) to install exhaust valve guide (1). Install exhaust valve
guide (1) until the protrusion is 17.8 ± 0.5 mm (0.70 ± 0.02 inch) above the cylinder head
assembly.
End By:
a. Install the inlet and exhaust valves. Refer to Disassembly and Assembly, "Inlet and Exhaust
Valves - Remove and Install".
Tue Jul 7 07:32:20 UTC+0800 2020
3/3
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Product: EXCAVATOR
i02368759
Inlet and Exhaust Valve Seat Inserts - Remove and Install
SMCS - 1103-010
Removal Procedure
Table 1
Required Tools
A(1)
6V-4194 Valve Seat Extractor 1
B(1)
165-5647 Valve Seat Extractor 1
C(1)
6V-4804 Handle 1
D(1)
6V-4192 Shaft 1
E(1)
6V-4199 Lifting Bracket 1
(1)
Part of the 166-7441 Valve Seat Extractor Tool Group
Start By:
a. Remove the inlet and exhaust valves. Refer to Disassembly and Assembly, "Inlet and
Exhaust Valves - Remove and Install".
NOTICE
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Note: Replace Tooling (A) with Tooling (B) for the removal of the inlet valve seat insert.
1. Install Tooling (A) in the exhaust valve seat insert.
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2. Install Tooling (C) and Tooling (D) in Tooling (A). Hand tighten Tooling (D). Tooling (A)
will expand below the edge of valve seat insert (1).
3. Install Tooling (E) on the cylinder head under Tooling (C). Hold Tooling (D) while you turn
Tooling (C). Remove valve seat (1).
Table 2
Required Tools
F 149-6115 Installer 1
NOTICE
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Note: Do not machine the prefinished valve seat inserts in order to correct the valve stem
projection. An excessive valve stem projection indicates that the valve seat insert is not
seated or material was not cleaned from the bottom of the counterbore.
1. Turn Tooling (F) upside-down and use Tooling (F) and a press to install valve seat inserts
(1) in the cylinder head assembly.
End By:
a. Install the inlet and exhaust valves. Refer to Disassembly and Assembly, "Inlet and Exhaust
Valves - Remove and Install".
Tue Jul 7 07:33:16 UTC+0800 2020
4/4
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Product: EXCAVATOR
i02221389
Engine Oil Filter Base - Remove
SMCS - 1306-011
Removal Procedure
Table 1
Required Tools
A 185-3630 Strap Wrench Assembly 1
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.
Refer to Special Publication, NENG2500, "Dealer Service Tool
Catalog" for tools and supplies suitable to collect and contain fluids on
Cat products.
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Dispose of all fluids according to local regulations and mandates.
Note: Remove the turbocharger, if necessary. Refer to Disassembly and Assembly,
"Turbocharger - Remove".
1. Remove oil filter assembly (1) with Tooling (A).
2. Disconnect tube assembly (2) from the elbow assembly.
3. Remove engine oil filter base (3).
Tue Jul 7 07:34:12 UTC+0800 2020
2/2
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Product: EXCAVATOR
i02229026
Engine Oil Filter Base - Disassemble
SMCS - 1306-015
Disassembly Procedure
Start By:
a. Remove the engine oil filter base and the oil cooler. Refer to Disassembly and Assembly,
"Engine Oil Filter Base and Oil Cooler - Remove".
NOTICE
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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.
(1) Oil cooler bypass valve
(2) Oil filter bypass valve
Tue Jul 7 07:35:07 UTC+0800 2020
2/2
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Product: EXCAVATOR
i02229174
Engine Oil Filter Base - Assemble
SMCS - 1306-016
Assembly Procedure
NOTICE
1/2
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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.
(1) Oil cooler bypass valve
(2) Oil filter bypass valve
End By:
a. Install the engine oil filter base and the oil cooler. Refer to Disassembly and Assembly,
"Engine Oil Filter Base and Oil Cooler - Install".
Tue Jul 7 07:36:03 UTC+0800 2020
2/2
2020/7/7

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Product: EXCAVATOR
i02473092
Engine Oil Filter Base - Install
SMCS - 1306-012
Table 1
Required Tools
A 185-3630 Strap Wrench Assembly 1
NOTICE
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1. Position the gasket and engine oil filter base (3) over the engine oil cooler.
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2. Install the bolts that hold engine oil filter base (3) to the cylinder block. Tighten the bolts in
sequence according to the following procedure:
a. Tighten Bolt (1) through Bolt (15) in a numerical sequence to a torque of 15 N·m (11
lb ft).
b. Tighten Bolt (1) through Bolt (15) in a numerical sequence to a torque of 28 N·m (21
lb ft).
3. Connect tube assembly (2) to engine oil filter base (3) .
4. Install oil filter assembly (1) with Tooling (A) . Follow the instructions with the oil filter
assembly for the correct installation.
Note: Install the turbocharger, if necessary. Refer to Disassembly and Assembly,
"Turbocharger - Install".
Tue Jul 7 07:36:59 UTC+0800 2020
3/3
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Product: EXCAVATOR
i02958037
Engine Oil Cooler - Remove
SMCS - 1378-011
Removal Procedure
Start By:
a. Remove the engine oil filter base. Refer to Disassembly and Assembly, "Engine Oil Filter
Base - Remove".
Personal injury can result from hot coolant, steam and alkali.
At operating temperature, engine coolant is hot and under pressure. The
radiator and all lines to heaters or the engine contain hot coolant or
steam. Any contact can cause severe burns.
Remove cooling system pressure cap slowly to relieve pressure only
when engine is stopped and cooling system pressure cap is cool enough
to touch with your bare hand.
Do not attempt to tighten hose connections when the coolant is hot, the
hose can come off causing burns.
Cooling System Coolant Additive contains alkali. Avoid contact with
skin and eyes.
NOTICE
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NOTICE
containing fluids.
Cat products.
2/3
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1. Remove engine oil cooler (1) and the gasket from the cylinder block.
2. Remove O-ring seals (2) from the cylinder block.
Tue Jul 7 07:37:55 UTC+0800 2020
3/3
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Product: EXCAVATOR
i01979965
Engine Oil Cooler - Install
SMCS - 1378-012
NOTICE
1/2
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Suggest:
If the above button click is invalid.
Please download this document
first, and then click the above link
to download the complete manual.
Thank you so much for reading

1. Install O-ring seals (2) in the cylinder block.
2. Put the gasket and engine oil cooler (1) in the cylinder block.
End By:
a. Install the engine oil filter base. Refer to Disassembly and Assembly, "Engine Oil Filter
Base - Install".
Tue Jul 7 07:38:50 UTC+0800 2020
2/2
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Product: EXCAVATOR
i01980628
Engine Oil Pump - Remove
SMCS - 1304-011
Removal Procedure
Start By:
a. Remove the engine oil pan. Refer to Disassembly and Assembly, "Engine Oil Pan - Remove
and Install".
NOTICE
NOTICE
containing fluids.
Cat products.
1/2
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Caterpillar Cat 325C EXCAVATOR (Prefix S2C) Service Repair Manual Instant Download.pdf

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