Caterpillar Cat 325D L MOBILE HYD POWER UNIT (Prefix H3N) Service Repair Manual (H3N00001 and up).pdf

Service Repair Manual
Models
325D L MOBILE HYD
POWER UNIT

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Product: MOBILE HYD POWER UNIT
Model: 325D L MOBILE HYD POWER UNIT H3N
Configuration: 325D L Mobile Hydraulic Power Unit H3N00001-UP (MACHINE) POWERED BY C7 Engine
Disassembly and Assembly
C7
Engines for Caterpillar Built Machines
Media Number -RENR9218-13 Publication Date -01/06/2014 Date Updated -04/06/2014
i02228289
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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325D L Mobile Hydraulic Power Unit H3N00001-UP (MACHINE) POWERED BY C...
2020/6/6
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Illustration 1 g01127720
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.
Note: The following components of the exhaust valves are different from the components of
the inlet valves: spring retainer (5), valve spring (4) and valve (2).
1. Use Tooling (A) to compress valve spring (4). Remove retainer locks (6).
2. Remove Tooling (A). Remove spring retainer (5), valve spring (4), and washer (3).
3. Remove valve seal (1) and valve (2).
Installation Procedure
Table 2
Required Tools
A 5S-1330 Valve Spring Compressor 1
NOTICE
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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. Lubricate valve (2) with clean engine oil. Install valve (2) in the cylinder head assembly.
Install new valve seal (1) against 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 locks (6).
End By:
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a. Install the cylinder head assembly. Refer to Disassembly and Assembly, "Cylinder Head -
Install".
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All Rights Reserved.
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Sat Jun 6 15:13:43 UTC+0800 2020
4/4
2020/6/6

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C7
i06201017
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 the inlet valve guides from the cylinder head assembly. Use
Tooling (B) to remove the exhaust valve guides 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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Note: Position the valve guides and tap on the top of the valve guides in order to start the
valve guides into the cylinder head assembly.
1. Use Tooling (A) and Tooling (C) to install inlet valve guides (1) . Install inlet valve guides
(1) until the protrusion is 23.0 ± 0.50 mm (0.90 ± 0.020 inch) above the cylinder head
assembly.
2. Use Tooling (B) and Tooling (D) to install the exhaust valve guides. Install the exhaust
valve guides until the protrusion is 24.05 ± 0.5 mm (1.0 ± 0.02 inch) above the cylinder
head assembly.
End By: Install the inlet and exhaust valves. Refer to Disassembly and Assembly, "Inlet and
Sat Jun 6 15:14:39 UTC+0800 2020
3/3
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C7
i02954230
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(2)
1
165-5647 Valve Seat Extractor(3)
1
6V-4804 Handle 1
6V-4192 Shaft 1
6V-4199 Lifting Bracket 1
(1)
Part of the 166-7441 Valve Seat Extractor Tool Group
(2)
Use for removal of the exhaust valve seats
(3)
Use for removal of the inlet valve seats
Start By:
a. Remove the inlet and exhaust valves. Refer to Disassembly and Assembly, "Inlet and
NOTICE
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1. Use Tooling (A) to remove valve seat inserts (1).
Table 2
Required Tools
B
149-6115 Installer 1
133-9306 Valve Guide 1
NOTICE
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1. Lower the temperature of new valve seat inserts (1).
2. Use Tooling (B) and a suitable press to install the new valve seat inserts in the cylinder
head.
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.
End By:
a. Install the inlet valves and exhaust valves. Refer to Disassembly and Assembly, "Inlet and
Sat Jun 6 15:15:35 UTC+0800 2020
3/3
2020/6/6

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C7
i02301129
Engine Oil Filter Base and Oil Cooler - Remove
SMCS - 1306-011; 1378-012
Removal Procedure
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, "Caterpillar Tools and Shop
Products Guide" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.
Dispose of all fluids according to local regulations and mandates.
NOTICE
Remote Mounted Engine Oil Filter Base
1/3
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Table 1
Required Tools
A 185-3630 Strap Wrench As 1
1. Use Tooling (A) to remove engine oil filter (1) .
2. Remove bolts (2) and engine oil filter base (3) .
Engine Mounted Engine Oil Filter Base
1. Drain the coolant from the cooling system into a suitable container for storage or disposal.
Refer to Operation and Maintenance Manual, "Cooling System Coolant - Change".
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2. Disconnect hose assemblies (4) .
3. Disconnect hose assembly (5) .
4. Remove bolts (6) and engine oil filter base (7) .
5. Remove oil cooler (8) and the gasket from the engine.
Sat Jun 6 15:16:30 UTC+0800 2020
3/3
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C7
i02301168
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
1/3
2020/6/6

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. Remove oil filter bypass valve (2) from engine oil filter base (1) .
2/3
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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. Remove adapter (3) and the O-ring seals from engine oil filter base (4) .
2. Remove oil filter bypass valve (5) and oil filter bypass valve (6) .
Sat Jun 6 15:17:26 UTC+0800 2020
3/3
2020/6/6

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C7
i02301184
Engine Oil Filter Base - Assemble
SMCS - 1306-016
Assembly Procedure
NOTICE
Table 1
Required Tools
A 155-0695 Thread Lock Compound 1
1/3
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injury.
1. Install oil filter bypass valve (6) and oil filter bypass valve (5) in engine oil filter base (4) .
2. Apply Tooling (A) to the threads of adapter (3). Install the O-ring seals and adapter (3).
Tighten adapter (3) to a torque of 150 ± 20 N·m (110 ± 15 lb ft).
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injury.
1. Install oil filter bypass valve (2) in engine oil filter base (1) .
End By: Install the engine oil filter base and the oil cooler. Refer to Disassembly and Assembly,
"Engine Oil Filter Base and Oil Cooler - Install".
Sat Jun 6 15:18:22 UTC+0800 2020
3/3
2020/6/6

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C7
i02301151
Engine Oil Filter Base and Oil Cooler - Install
SMCS - 1306-012; 1378-012
NOTICE
1/3
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1. Position the gasket and oil cooler (8) on the engine.
2. Install engine oil filter base (7) and bolts (6) .
3. Connect hose assembly (5) .
4. Connect hose assemblies (4) .
5. Fill the cooling system. Refer to Operation and Maintenance Manual, "Cooling System
Coolant - Change".
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1. Position engine oil filter base (3) and install bolts (2) .
2. Install engine oil filter (1) .
Sat Jun 6 15:19:18 UTC+0800 2020
3/3
2020/6/6

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C7
i02301238
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
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1. Remove bracket (5) .
2. Remove pickup tube (4) and the gasket from engine oil pump (1) .
3. Remove outlet elbow (3) and the O-ring seals from engine oil pump (1) .
4. Remove bolts (2) and engine oil pump (1) .
Sat Jun 6 15:20:14 UTC+0800 2020
2/2
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C7
i02301249
Engine Oil Pump - Disassemble
SMCS - 1304-015
Disassembly Procedure
Table 1
Required Tools
A 8B-7554 Bearing Cup Puller Gp 1
B 1P-0510 Driver Gp 1
Start By:
A. Remove the engine oil pump. Refer to Disassembly and Assembly, "Engine Oil Pump -
Remove".
NOTICE
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1. Remove bolt (1) .
2. Remove idler gear (3) from shaft (4) .
3. Use Tooling (B) and remove bearing (2) from idler gear (3) .
4. Use Tooling (A) to remove drive gear (5) from engine oil pump (6) .
Sat Jun 6 15:21:09 UTC+0800 2020
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Caterpillar Cat 325D L MOBILE HYD POWER UNIT (Prefix H3N) Service Repair Manual (H3N00001 and up).pdf

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