Service Repair Manual
Models
312D2 and 312D2 L Excavator
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Product: EXCAVATOR
Model: 312D2 L EXCAVATOR MGJ
Configuration: 312D2 & 312D2 L Excavators MGJ00001-UP (MACHINE) POWERED BY 3054C Engine
Disassembly and Assembly
3054C Engines for Caterpillar Built Machines
Media Number -SENR5069-18
Publication Date -01/05/2015
Date Updated -19/09/2018
i07030444
Flywheel - Install
SMCS - 1156-012
Installation Procedure
Table 1
Required Tools
Tool Part Number
Part Description
Qty
A
-
Guide Bolt
(1/2 inch - 20 NF by 4 inch)
2
B
138-7575
Link Bracket
1
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
1. Thoroughly clean the flywheel housing. Inspect the crankshaft rear seal for leaks. If there
are any oil leaks, refer to this Disassembly and Assembly Manual, "Crankshaft Rear Seal -
Remove" for the correct procedure.
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Illustration 1
g00909349
Always wear protective gloves when handling parts that have been
heated.
Note: If ring gear (3) has been removed from flywheel (2). Identify the orientation of ring
gear (3) on the flywheel for the correct positioning when the new ring gear is installed.
2. Heat the ring gear to 250 °C (480 °F) in an oven to install the ring gear onto the flywheel.
Ensure that the orientation of the ring gear is correct and quickly install the ring gear onto
the flywheel.
Note: Do not use a torch to heat the ring gear.
3. Clean flywheel (2) and ring gear (3) when the ring gear has cooled.
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312D2 & 312D2 L Excavators MGJ00001-UP (MACHINE) POWERED BY 3054C E...
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Illustration 2
g01148312
4. Install the Tooling (A) on the crankshaft. Install the Tooling (B) and a suitable lifting device
on flywheel (2) and position the flywheel in the fl