Caterpillar Cat 320 GC Excavator (Prefix KTN) Service Repair Manual (KTN00001 and up).pdf

Service Repair Manual
Models
320 GC Excavator

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Product: EXCAVATOR
Model: 320 GC EXCAVATOR KTN
Configuration: 320 GC Excavator KTN00001-UP (MACHINE) POWERED BY C4.4 Engine
Disassembly and Assembly
C4.4 Engines for Caterpillar Built Machines
Media Number -UENR4516-11 Publication Date -01/06/2015 Date Updated -29/10/2018
i05820278
Flywheel - Install
SMCS - 1156-012
Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A - Guide Studs 1/2 inch - UNF by 4 inch 2
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
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Illustration 1 g01336671
Typical example
Always wear protective gloves when handling parts that have been
heated.
1. If the flywheel ring gear was removed, follow Step 1.a through Step 1.c in order to install
ring gear (5) to flywheel (1).
a. Identify the orientation of teeth (6) on new ring gear (5).
Note: The chamfered side of ring gear teeth (6) must face toward the starting motor
when the flywheel is installed. The chamfered on ring gear teeth will ensure the
correct engagement of the starting motor.
b. Heat flywheel ring gear (5) 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 (5) is correct and quickly install the ring gear
onto flywheel (1).
2. Inspect the crankshaft rear seal for leaks. If there are any oil leaks, replace the crankshaft
rear seal. Refer to Disassembly and Assembly, "Crankshaft Rear Seal - Remove" for the
correct procedure.
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Typical example
3. Install a suitable lifting device on flywheel (1). The flywheel can weigh 71 kg (156 lb).
4. Install Tooling (A) in Position (X) on the crankshaft.
5. Use the lifting device to position flywheel (1) onto Tooling (A).
6. If necessary, install pilot bearing (3) and bolts (2) to flywheel (1).
7. Install bolts (4) to flywheel (1).
8. Remove Tooling (A) and install remaining bolts (4) to flywheel (1).
9. Use a suitable tool to prevent the flywheel from rotating. Tighten bolts (2) and (4) to a
torque of 140 N·m (103 lb ft).
10. Remove the lifting device from flywheel (1).
11. Check the run out of the flywheel. Refer to Specifications, "Flywheel" for further
information.
End By:
a. Install the electric starting motor. Refer to Disassembly and Assembly, "Electric Starting
Motor - Remove and Install" for the correct procedure.
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Product: EXCAVATOR
i05820279
Crankshaft Rear Seal - Remove
SMCS - 1161-011
Removal Procedure
Table 1
Required Tools
A 227-4390 E12 Torx Socket 1
Start By:
a. Remove the flywheel. Refer to Disassembly and Assembly, "Flywheel - Remove" for the
correct procedure.
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.
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Dispose of all fluids according to local regulations and mandates.
Note: The crankshaft rear seal and the housing are manufactured as a one-piece assembly. The
assembly is not serviceable. If the crankshaft rear seal is removed, the assembly must be replaced.
1. Use Tooling (A) in order to remove torx screws (1) from crankshaft rear seal (2).
2. Remove crankshaft rear seal (2) from the cylinder block. Discard the crankshaft rear seal.
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Sat Dec 14 16:05:34 UTC+0800 2019
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Product: EXCAVATOR
i05820280
Crankshaft Rear Seal - Install
SMCS - 1161-012
Installation Procedure
Table 1
Required Tools
A 227-4390 E12 Torx Socket 1
B FT-2806 Alignment Tool 1
Note: The crankshaft rear seal and the housing are manufactured as a one-piece assembly.
NOTICE
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1. Ensure that crankshaft flange (1) is clean, dry, and free from damage.
2. Ensure that the face of the cylinder block and the bridge piece are clean and dry.
3. A new crankshaft rear seal is supplied with a plastic sleeve (3). Ensure that the plastic
sleeve is squarely installed within crankshaft rear seal (2).
Note: The plastic sleeve is included in order to protect the lip of the seal as the seal is
pushed over the crankshaft flange.
Note: Do not lubricate the crankshaft rear seal or the crankshaft flange. The
crankshaft rear seal must be installed dry.
4. Align plastic sleeve (3) with crankshaft flange (1). Ensure that the plastic sleeve is engaged
onto the crankshaft flange. Push new crankshaft rear seal (2) squarely onto the crankshaft
flange.
During this process, the plastic sleeve will be forced out of the crankshaft rear seal. Discard
the plastic sleeve.
5. Align the two molded locators on crankshaft rear seal (2) with the holes in the cylinder
block. Ensure that the crankshaft rear seal is seated against the cylinder block.
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6. Install torx screws (4) finger tight.
Tightening sequence for the crankshaft rear seal
Note: Do not install torx screws to Positions (X) at this stage.
7. Install Tooling (B) to crankshaft rear seal (2) and to crankshaft flange (1).
8. Use Tooling (A) in order to tighten torx screws (4) to a torque of 22 N·m (16 lb ft). Tighten
torx screws (4) in the sequence that is shown in Illustration 3.
9. Remove Tooling (B).
10. Install remaining torx screws (4) to Positions (X). Use Tooling (A) in order to tighten the
torx screws to a torque of 22 N·m (16 lb ft). Refer to Illustration 3.
End By:
a. Install the flywheel. Refer to Disassembly and Assembly, "Flywheel - Install" for the correct
procedure.
Sat Dec 14 16:06:30 UTC+0800 2019
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Product: EXCAVATOR
i05820282
Flywheel Housing - Remove and Install - Wet Back End
Housing
SMCS - 1157-010
Removal Procedure
Table 1
Required Tools
A -
Guide Stud
M10 by 100 mm 2
Start By:
correct procedure.
NOTICE
Note: The wet back end flywheel housing may be installed on standard engines. When the wet
back-end flywheel housing is installed, to a standard engine a seal will not be installed to the
flywheel housing.
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Typical example
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1. Remove the bolts from Position (X) from flywheel housing (1).
2. Install Tooling (A) into Position (X) on flywheel housing (1).
3. Install a suitable lifting device to the flywheel housing in order to support the flywheel
housing. The flywheel housing can weigh 40 kg (88 lb).
4. Remove bolts (2) and remaining bolts (3) from flywheel housing (1).
5. Use the lifting device in order to remove flywheel housing (1) from the cylinder block.
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Typical example
6. Remove dust seal (5).
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Typical example
7. Remove gasket (6).
8. If necessary, remove dowels (4) from the cylinder block.
9. Remove oil seal (7) from flywheel housing (1).
Installation Procedure (Wet Back End Housing)
Table 2
Required Tools
A -
Guide Studs
M10 by 100 mm
2
NOTICE
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1. Ensure that the flywheel housing is clean and free from damage. If necessary, replace the
flywheel housing.
Typical example
2. Install a new oil seal (7) to flywheel housing (1).
Note: Press the oil seal into the flywheel housing from the rear. Ensure that the front edge
of the oil seal is flush with the gasket surface of the flywheel housing .
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Typical example
3. Inspect crankshaft rear seal (8) for leaks. If there are any oil leaks, replace the crankshaft
rear seal. Refer to Disassembly and Assembly, "Crankshaft Rear Seal - Remove" and refer
to Disassembly and Assembly, "Crankshaft Rear Seal - Install" for the correct procedure.
4. Clean the rear face of the cylinder block. If necessary, install dowels (4) to the cylinder
block.
5. Install Tooling (A) to the cylinder block.
6. Align a new gasket (6) with Tooling (A). Install the gasket to the cylinder block.
7. Install dust seal (5).
8. Install a suitable lifting device to the flywheel housing. The flywheel housing can weigh
40 kg (88 lb).
9. Use the lifting device to align flywheel housing (1) with Tooling (A). Install the flywheel
housing to the cylinder block.
10. Install bolts (2) and bolts (3).
11. Remove Tooling (A). Install remaining bolts (3).
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Identification of the bolt Grade.
12. When 8.8 Graded bolts are installed, follow Step 12.a through Step 12.b.
a. Tighten bolts (3) to a torque of 63 N·m (46 lb ft).
b. Tighten bolts (2) to a torque of 78 N·m (58 lb ft).
13. When 10.9 Graded bolts are installed, follow Step 13.a through Step 13.b.
a. Tighten bolts (3) to a torque of 115 N·m (85 lb ft).
b. Tighten bolts (2) to a torque of 190 N·m (140 lb ft).
14. Check the alignment of flywheel housing (1) with the crankshaft. Refer to System
Operation, Testing and Adjusting, "Flywheel Housing - Inspect" for further information.
End By:
a. Install the flywheel. Refer to Disassembly and Assembly, "Flywheel - Install" for the correct
procedure.
Sat Dec 14 16:07:26 UTC+0800 2019
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Product: EXCAVATOR
i06987814
Flywheel Housing - Remove and Install - Standard Housing
SMCS - 1157-010
Removal Procedure
Table 1
Required Tools
A -
Guide Studs
M10 by 100 mm
2
Start By:
correct procedure.
NOTICE
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Typical example
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Caterpillar Cat 320 GC Excavator (Prefix KTN) Service Repair Manual (KTN00001 and up).pdf

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