Service Repair Manual
320 GC 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
Flywheel - Install
SMCS - 1156-012
Tool Part Number
Guide Studs 1/2 inch - UNF by 4 inch
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
Always wear protective gloves when handling parts that have been
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
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