Caterpillar Cat 325D Excavator (Prefix SCR) Service Repair Manual (SCR00001 and up).pdf

Service Repair Manual
Models
325D and 325D L Excavator

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Product: EXCAVATOR
Model: 325D L EXCAVATOR SCR
Configuration: 325D & 325D L Excavators SCR00001-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
i02303869
Rocker Shaft and Pushrod - Install
SMCS - 1102-012; 1208-012
Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 8T-2998 Lubricant 1
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
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325D & 325D L Excavators SCR00001-UP (MACHINE) POWERED BY C7 Engine(...
2020/6/3
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Illustration 1 g01153544
1. Apply Tooling (A) to both ends of pushrods (6) .
2. Lubricate pushrods (6) with clean engine oil. Install pushrods (6) and inlet valve bridges
(5) .
3. Position rocker shaft (3). Install bolts (1) and bolts (2). Finger tighten bolts (1) and bolts (2).
Tighten bolts (2) and bolts (1) to standard torque.
4. Apply Tooling (A) to each of the button faces of the rocker arms.
5. Adjust the valve lash of the rocker arm by turning rocker arm adjustment screws (4). Refer
to Testing and Adjusting, "Engine Valve Lash - Inspect/Adjust".
End By: Install the valve mechanism cover. Refer to Disassembly and Assembly, "Valve
Mechanism Cover - Remove and Install".
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
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Product: EXCAVATOR
C7
i02303932
Cylinder Head - Remove
SMCS - 1100-011
Removal Procedure
Start By:
A. Remove the valve mechanism cover base. Refer to Disassembly and Assembly, "Valve
Mechanism Cover Base - Remove and Install".
B. Remove the rocker shaft and pushrods. Refer to Disassembly and Assembly, "Rocker Shaft
And Pushrod - Remove".
C. Remove the unit injectors. Refer to Disassembly and Assembly, "Unit Injector - Remove".
D. Remove the fan drive mounting group. Refer to Disassembly and Assembly, "Fan Drive
Mounting Group - Remove and Install".
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.
1/4
2020/6/3

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.
1. Disconnect harness assemblies (1), (2), (3), (4), and (5) .
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2. Disconnect hose assembly (6) and tube assembly (7) .
3. Disconnect tube assembly (8) and tube assembly (10) from turbocharger (9) .
4. Attach a suitable lifting device to cylinder head (11). The weight of cylinder head (11) is
approximately 175 kg (385 lb).
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5. Remove bolts (12) and bolts (13). Remove cylinder head (11) and the gasket from the
cylinder block.
Wed Jun 3 15:42:26 UTC+0800 2020
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Product: EXCAVATOR
C7
i02304034
Cylinder Head - Install
SMCS - 1100-012
Table 1
Required Tools
A 6V-4876 Lubricant 1
B 4C-5590 Anti-Seize Compound 1
NOTICE
1. Install a new cylinder head gasket.
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Note: To avoid damage to the cylinder head gasket, use guide bolts of an appropriate size to
install the cylinder head.
2. Attach a suitable lifting device to cylinder head (11). The weight of cylinder head (11) is
approximately 175 kg (385 lb). Position cylinder head (11) onto the cylinder block.
3. Apply Tooling (A) to the threads and both sides of the washers of bolts (12). Apply Tooling
(B) to the threads and both sides of the washers of bolts (13). Install bolts (12) and bolts
(13) .
4. Tighten the cylinder head bolts according to the following procedure:
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a. Tighten Bolt (1) through Bolt (14) in a numerical sequence to a torque of 300 ± 15
N·m (221 ± 11 lb ft).
b. Loosen Bolt (1) through Bolt (14) until the washers are loose under the bolt heads.
c. Tighten Bolt (1) through Bolt (14) in a numerical sequence to a torque of 130 ± 15
N·m (95 ± 11 lb ft).
d. Tighten Bolt (1) through Bolt (14) again in a numerical sequence to a torque of 130 ±
15 N·m (95 ± 11 lb ft).
e. Turn Bolt (1) through Bolt (14) in a numerical sequence for an additional 90° (1/4
turn).
f. Tighten Bolt (15) through Bolt (20) in a numerical sequence to a torque of 55 ± 7
N·m (41 ± 5 lb ft).
5. Connect tube assembly (8) and tube assembly (10) to turbocharger (9) .
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6. Connect hose assembly (6) and tube assembly (7) .
7. Connect harness assemblies (1), (2), (3), (4), and (5) .
End By:
a. Install the fan drive mounting group. Refer to Disassembly and Assembly, "Fan Drive
Mounting Group - Remove and Install".
b. Install the unit injectors. Refer to Disassembly and Assembly, "Unit Injector - Install".
c. Install the rocker shaft and pushrods. Refer to Disassembly and Assembly, "Rocker Shaft
And Pushrod - Install".
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d. Install the valve mechanism cover base. Refer to Disassembly and Assembly, "Valve
Mechanism Cover Base - Remove and Install".
Wed Jun 3 15:43:22 UTC+0800 2020
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Product: EXCAVATOR
C7
i02304097
Lifter Group - Remove and Install
SMCS - 1209-010
Removal Procedure
Start By:
A. Remove the rocker arms and pushrods. Refer to Disassembly and Assembly, "Rocker Shaft
and Pushrod - Remove".
B. Remove the unit injector hydraulic pump. Refer to Disassembly and Assembly, "Unit
Injector Hydraulic Pump - Remove".
C. Remove the speed/timing sensors. Refer to Disassembly and Assembly, "Speed/Timing
Sensor - Remove and Install".
D. Remove the electronic control module (ECM). Refer to Disassembly and Assembly,
"Electronic Control Module - Remove and Install".
NOTICE
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1. Remove bolts (1) .
2. Remove side covers (2) .
3. Place identification marks on each lifter in order to identify the proper location on the side
cover for installation.
Note: Ensure that the sleeves of the side covers remain in the side covers.
4. Remove bolts (3) and the dowels that hold lifter arms (4) and lifter shaft (5) to each side
cover. Remove seal (6) .
2/4
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Table 1
Required Tools
A 9S-3263 Thread Lock Compound 1
NOTICE
1. Install seal (6) .
2. Install lifter arms (4) on lifter shaft (5) .
3. Position lifter shaft (5) over the dowels on the side cover. Ensure that the oil holes in the
lifter shaft are facing the side cover. Apply Tooling (A) on the threads of bolts (3) that hold
lifter shaft (5) to the side cover. Install bolts (3). Tighten bolts (3) to a torque of 13 ± 3 N·m
(10 ± 2 lb ft). Tighten the two center bolts. Then tighten the end bolts.
4. Lubricate the lifters with clean engine oil.
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5. Position the gaskets and side covers (2). Install bolts (1) .
End By:
a. Install the electronic control module (ECM). Refer to Disassembly and Assembly,
"Electronic Control Module - Remove and Install".
b. Install the speed/timing sensors. Refer to Disassembly and Assembly, "Speed/Timing
Sensor - Remove and Install".
c. Install the unit injector hydraulic pump. Refer to Disassembly and Assembly, "Unit Injector
Hydraulic Pump - Install".
d. Install the rocker arms and pushrods. Refer to Disassembly and Assembly, "Rocker Shaft
and Pushrod - Install".
Wed Jun 3 15:44:18 UTC+0800 2020
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2020/6/3

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Product: EXCAVATOR
C7
i02304162
Camshaft - Remove
SMCS - 1210-011
Removal Procedure
Table 1
Required Tools
A
136-4632 Timing Pin 1
139-7063 Timing Pin Adapter 1
B FT-2730 Puller 12
Start By:
A. Remove the vibration damper and the pulley. Refer to Disassembly and Assembly,
"Vibration Damper and Pulley - Remove and Install".
B. Remove the rocker arms and the pushrods. Refer to Disassembly and Assembly, "Rocker
Shaft and Pushrod - Remove".
C. Remove the front cover. Refer to Disassembly and Assembly, "Front Cover - Remove and
Install".
NOTICE
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1. Use Tooling (B) to reposition the valve lifters out of the way.
2. Ensure that the No. 1 cylinder is at the top center compression stroke. Refer to Testing and
Adjusting, "Finding Top Center Position for No. 1 Piston". Install Tooling (A) in the
flywheel.
3. Ensure that the timing marks on the following gears are aligned: the camshaft drive gear, the
idler gear and the crankshaft gear.
4. Rotate camshaft gear (1) in order to access bolts (2). Remove bolts (2) .
5. Remove thrust plate (3) .
6. Remove camshaft (4) from the cylinder block.
Wed Jun 3 15:45:13 UTC+0800 2020
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2020/6/3

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Product: EXCAVATOR
C7
i02304177
Camshaft - Install
SMCS - 1210-012
NOTICE
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1. Carefully install camshaft (4) in the cylinder block.
2. Install thrust plate (3) .
3. If necessary, rotate camshaft gear (1) in order to access thrust plate (3). Install bolts (2) .
4. Ensure that the No. 1 cylinder is at the top center compression stroke. Refer to Testing and
Adjusting, "Finding Top Center Position for No. 1 Piston".
5. Ensure that the timing marks on the following gears are aligned: the camshaft drive gear, the
idler gear and the crankshaft gear.
End By:
a. Install the front cover. Refer to Disassembly and Assembly, "Front Cover - Remove and
Install".
b. Install the rocker arms and the pushrods. Refer to Disassembly and Assembly, "Rocker
Shaft and Pushrod - Install".
c. Install the vibration damper and the pulley. Refer to Disassembly and Assembly, "Vibration
Damper and Pulley - Remove and Install".
Wed Jun 3 15:46:09 UTC+0800 2020
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2020/6/3

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Product: EXCAVATOR
C7
i06290358
Camshaft Gear - Remove and Install
SMCS - 1210-010-GE
Removal Procedure
Start By:
A. Remove the camshaft. Refer to Disassembly and Assembly, "Camshaft - Remove".
1. Wrap the camshaft with a protective covering in order to prevent damage to the camshaft.
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NOTICE
Do not allow the camshaft to fall to the floor when pressing it from the
drive gear. Also make sure that the camshaft lobes do not catch on the
press plates.
2. Place the camshaft assembly in a suitable press. Press camshaft (2) from camshaft gear (1) .
3. If necessary, remove key (3) from the camshaft.
1. Raise the temperature of the camshaft gear from 200° C (392° F) to 250° C (482° F).
Note: Do not use a torch to heat the camshaft gear.
2. Align key (3) in the camshaft with the groove (keyway) in the camshaft gear.
3. Install camshaft gear (1) on the end of camshaft (2) .
End By: Install the camshaft. Refer to Disassembly and Assembly, "Camshaft - Install".
Wed Jun 3 15:47:05 UTC+0800 2020
2/2
2020/6/3

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Product: EXCAVATOR
C7
i02232381
Camshaft Bearings - Remove and Install
SMCS - 1211-010
Removal Procedure
Table 1
Required Tools
A 8S-2241 Camshaft Bearing Tool Group 1
Start By:
a. Remove the camshaft. Refer to Disassembly and Assembly, "Camshaft - Remove".
NOTICE
Note: Note the oil hole orientation in each camshaft bearing prior to removal for assembly
purposes.
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1. Use Tooling (A) to remove camshaft bearing (1) from the front of the cylinder block.
Remove the remaining camshaft bearings (2) from the cylinder block.
Table 2
Required Tools
A 8S-2241 Camshaft Bearing Tool Group 1
NOTICE
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1. Use Tooling (A) to install all of the camshaft bearings (2) except for the front camshaft
bearing. Locate the oil hole in each bearing so that oil hole (3) is located at the top of the
bore. Refer to Specifications for more information.
2. Use Tooling (A) to install front camshaft bearing (1). Align oil hole (5) in the front
camshaft bearing with the oil hole in the cylinder block. Locate joint (4) in the front
camshaft bearing in the proper position. Refer to Specifications for more information.
End By:
a. Install the camshaft. Refer to Disassembly and Assembly, "Camshaft - Install".
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Product: EXCAVATOR
C7
i05954439
Engine Oil Pan - Remove and Install
SMCS - 1302-010
Removal Procedure
Start By:
A. Remove the engine.
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.
Dispose of all fluids according to local regulations and mandates.
1/3
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1. Drain the engine oil into a suitable container for storage or disposal. Refer to Operation and
Maintenance Manual, "Engine Oil and Filter - Change" for the correct draining and filling
procedures.
Note: Do not pry or gouge the sealing surface of the engine oil pan. Use a rubber mallet to
tap lightly on the engine oil pan, if necessary.
2. Remove bolts (2) . Remove engine oil pan (1) and the gasket.
Table 1
Tool Part number Part Description Qty
A - Loctite 598 1
NOTICE
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Caterpillar Cat 325D Excavator (Prefix SCR) Service Repair Manual (SCR00001 and up).pdf

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