Caterpillar Cat 308E2 Mini Hydraulic Excavator (Prefix F8C) Service Repair Manual (F8C00001 and up).pdf

Service Repair Manual
Models
308E2 Mini Hydraulic Excavator

NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
Illustration 1 g02794543
1. Remove two bolts (2) from flywheel (1).
2. Install Tooling (A) into the crankshaft.
3. Install Tooling (B) and a suitable lifting device on flywheel (1). The weight of flywheel (1)
is approximately 30 kg (66 lb).
4. Remove remaining bolts (2).
5. Remove flywheel (1) from the cylinder block.
3/6
308E2 Mini Hydraulic Excavator F8C00001-UP (MACHINE) POWERED BY C3.3B ...
2020/1/11
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6. Inspect flywheel (1) and the ring gear (3) for wear and damage. Replace any worn
components or damaged components.
7. If necessary, remove the flywheel ring gear (3), follow Step 7.a through Step 7.b.
a. Place the flywheel assembly on a suitable support.
b. Use a hammer and a punch in order to remove ring gear (3) from flywheel (1). If
necessary, a torch may be needed to heat ring gear (3).
Note: Identify the orientation of the teeth on the flywheel ring gear (3).
Installation Procedure
Table 2
Required Tools
Tool Part Number Part Description Qty
A -
Guide Stud
M12 - 1.25 by 100 mm
2
B 138-7573 Link Bracket 1
NOTICE
4/6
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Always wear protective gloves when handling parts that have been
heated.
1. If flywheel ring gear (3) was removed, follow Step 1.a through Step 1.c in order to install
ring gear (3) to flywheel (1).
a. Identify the orientation of teeth on new ring gear (3).
Note: The chamfered side of ring gear teeth must face toward the starting motor when
the flywheel is installed. This position will ensure the correct engagement of the
starting motor.
b. Raise heat of flywheel ring gear (3) in an oven to a maximum temperature of 250 °C
(482 °F) prior to installation.
Note: Do not use a torch to heat the ring gear.
c. Ensure that the orientation of ring gear (3) is correct and quickly install the ring gear
onto flywheel (1).
5/6
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2. Install Tooling (B) and a suitable lifting device on flywheel (1). The weight of flywheel (1)
3. Install Tooling (A) into the crankshaft.
4. Use the lifting device to position flywheel (1) onto Tooling (A).
5. Install bolts (2) to flywheel (1).
6. Remove Tooling (A).
7. Install remaining bolts (2) to flywheel (1). Apply engine oil to bolts. Tighten bolts (2) to a
torque of 98 to 107 N·m (72 to 80 lb ft).
8. Check the run out of the flywheel. Refer to Specifications, "Flywheel" for further
information.
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All Rights Reserved.
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Sat Jan 11 16:08:07 UTC+0800 2020
6/6
2020/1/11

Shutdown SIS
Previous Screen
Product: MINI HYD EXCAVATOR
Model: 308E2 MINI HYD EXCAVATOR F8C
Configuration: 308E2 Mini Hydraulic Excavator F8C00001-UP (MACHINE) POWERED BY C3.3B Engine
Disassembly and Assembly
C2.6 and C3.3B Engines for Caterpillar Built Machines
Media Number -UENR0137-11 Publication Date -01/08/2015 Date Updated -12/07/2018
i05242534
Flywheel - Remove and Install - C2.6
SMCS - 1156-010
S/N - CE21-UP
S/N - F8C1-UP
S/N - FHL1-UP
S/N - H1Y1-UP
Removal Procedure
Table 1
Required Tools
A 138-7573 Link Bracket 1
Note: Refer to Specification UENR0995 "Engine Design" for non-specified engine Torque
Values.
1/4
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1. Install Tooling (A) on to flywheel (1).
2. The weight of flywheel (1) is approximately 30 kg (66 lb). Attach a suitable lifting device to
Tooling (A). Remove bolts (2) and remove flywheel (1).
3. Inspect flywheel (1) and the ring gear (3) for wear and damage. Replace any worn
components or damaged components.
4. If necessary, remove the flywheel ring gear (3), follow Step 4.a through Step 4.b.
a. Place the flywheel assembly on a suitable support.
b. Use a hammer and a punch in order to remove ring gear (3) from flywheel (1). If
necessary, a torch may be needed to heat ring gear (3).
Note: Identify the orientation of the teeth on the flywheel ring gear (3).
Table 2
Required Tools
2/4
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A 138-7573 Link Bracket 1
Always wear protective gloves when handling parts that have been
heated.
1. If flywheel ring gear (3) was removed, follow Step 1.a through Step 1.c in order to install
ring gear (3) to flywheel (1).
a. Identify the orientation of teeth on new ring gear (3).
Note: The chamfered side of ring gear teeth must face toward the starting motor when
the flywheel is installed. This position will ensure the correct engagement of the
starting motor.
b. Raise the temperature of flywheel ring gear (3) in an oven to a maximum temperature
of 250 °C (482 °F) prior to installation.
Note: Do not use a torch to raise the temperature of ring gear.
c. Ensure that the orientation of ring gear (3) is correct and quickly install the ring gear
onto flywheel (1).
3/4
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2. Install Tooling (A) and a suitable lifting device on flywheel (1). The weight of flywheel (1)
3. Use the lifting device to position flywheel (1) onto crankshaft.
4. Apply clean engine oil to the threads of bolts (2). Install bolts (2) to flywheel (1). Tighten
bolts (2) to a torque of 98 to 107 N·m (72 to 80 lb ft).
5. Remove Tooling (A).
6. Check the run out of the flywheel. Refer to Specifications, "Flywheel" for further
information.
Sat Jan 11 16:09:03 UTC+0800 2020
4/4
2020/1/11

Shutdown SIS
Previous Screen
i05242540
Crankshaft Rear Seal and Wear Sleeve - Remove - Includes
Crankshaft Gear
SMCS - 1161-011; 7558-011
Removal Procedure
Start By:
a. Remove the flywheel.
NOTICE
1. Place the engine at top dead center.
1/2
2020/1/11

2. Use a screw driver to remove rear seal (1).
3. Check the alignment of crankshaft gear (2) and camshaft gear (3). Remove crankshaft gear
(2) and ring seal.
4. Place crankshaft gear (2) with wear sleeve (4) in a suitable vice. Remove wear sleeve (4)
with a suitable chisel.
Sat Jan 11 16:10:00 UTC+0800 2020
2/2
2020/1/11

Shutdown SIS
Previous Screen
i05242547
Crankshaft Rear Seal and Wear Sleeve - Install - Includes
Crankshaft Gear
SMCS - 1161-012; 7558-012
Table 1
Required Tools
A
390-1146 Crankshaft Rear Seal and Wear Sleeve Driver(1)
1
423-9665 Crank shaft Rear Seal and Wear Sleeve Driver(2)
1
(1)
Used for the C3.3B
(2)
Used for the C2.6
Values.
1/2
2020/1/11

1. Place wear sleeve (4) on crankshaft gear (2). Position Tooling (A). Use a suitable press and
install wear sleeve (4).
2. Align crankshaft gear (2) with camshaft gear (3). Install crankshaft gear (2) into the
flywheel housing.
3. Apply clean engine oil on the lip of crankshaft rear seal (1). Use Tooling (A) in order to
install crankshaft rear seal (1).
End By:
a. Install the flywheel.
Sat Jan 11 16:10:57 UTC+0800 2020
2/2
2020/1/11

Shutdown SIS
Previous Screen
i05242551
Flywheel Housing - Remove and Install
SMCS - 1157-010
Removal Procedure
Table 1
Required Tools
A -
Guide Stud
M12 x 1.25 by 100 mm
2
B 138-7575 Link Brackets 2
Start By:
a. Remove the flywheel.
b. Remove the rear crankshaft seal.
Values.
NOTICE
1/3
2020/1/11

1. Remove two bolts (3) from flywheel housing (1).
2. Install Tooling (A) into flywheel housing (1).
3. Install Tooling (B). Install a suitable lifting device to flywheel housing (1). The weight of
flywheel housing (1) is approximately 25 kg (55 lb).
4. Remove remaining six bolts (3) and 8 bolts (2) from flywheel housing (1).
5. Remove flywheel housing (1) from the cylinder block.
6. Remove bearing (4).
7. Remove the gasket (5).
8. If necessary, remove the dowels from the cylinder block.
1. Install flywheel housing (1) in the reverse order of removal.
2/3
2020/1/11

a. Install liquid gasket to the seam between the lower crankcase section (7) and the
upper crankcase section (6).
b. For the C3.3B tighten 8 bolts (3) and 8 bolts (2) to a torque of 103 to 117 N·m
(76 to 87 lb ft).
c. For the C2.6 tighten 8 bolts (3) and 8 bolts (2) to a torque of 78 to 90 N·m
(58 to 66 lb ft).
Sat Jan 11 16:11:54 UTC+0800 2020
3/3
2020/1/11

Shutdown SIS
Previous Screen
i05242553
Crankshaft Pulley - Remove and Install
SMCS - 1205-010
Removal Procedure
Start By:
a. Remove the v-belt.
Values.
NOTICE
1/2
2020/1/11

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1. Use a suitable tool in order to prevent the crankshaft from rotating. Remove bolt (2) in order
to remove crankshaft pulley (1).
1. Install crankshaft pulley (1) in the reverse order of removal.
a. Apply clean engine oil to the threads of bolt (2). Tighten bolt (2) to a torque of
255 to 274 N·m (188 to 202 lb ft).
Sat Jan 11 16:12:50 UTC+0800 2020
2/2
2020/1/11

Shutdown SIS
Previous Screen
i05242559
Crankshaft Front Seal - Remove and Install
SMCS - 1160-010
Removal Procedure
Start By:
a. Remove the crankshaft pulley.
Values.
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.
1/3
2020/1/11

1. Use a suitable pry bar to remove crankshaft front seal (1).
Table 1
Required Tools
A 390-1140 Driver 1
B 6V-6640 Sealant 1
Note: The crankshaft front seal should be installed dry. Lubricate the inner rubber portion of the
crankshaft front seal.
2/3
2020/1/11

1. Lubricate the inner rubber portion of crankshaft front seal (1). Apply Tooling (B) on
crankshaft front seal (1). Position crankshaft front seal (1) on Tooling (A). Install crankshaft
front seal (1) on the crankshaft.
End By:
a. Install the crankshaft pulley.
Sat Jan 11 16:13:47 UTC+0800 2020
3/3
2020/1/11

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