Service Repair Manual
320D2 GC Excavator
Model: 320D2 GC EXCAVATOR ZBH
Configuration: 320D2 GC Excavator ZBH00001-UP (MACHINE) POWERED BY C4.4 Engine
Disassembly and Assembly
C4.4 Engines for Caterpillar Built Machines
Media Number -UENR4525-09
Publication Date -01/06/2015
Date Updated -22/05/2018
Idler Gear - Remove
SMCS - 1206-011
Removal Procedure (Standard Idler Gear)
Tool Part Number
Timing Pin (Camshaft)
Timing Pin (Crankshaft)
a. If the engine is equipped with an air compressor, remove the air compressor. Refer to
Disassembly and Assembly, "Air Compressor - Remove and Install".
b. If the engine is equipped with a vacuum pump, remove the vacuum pump. Refer to
Disassembly and Assembly, "Vacuum Pump - Remove and Install".
c. If the engine is equipped with an accessory drive, remove the accessory drive. Refer to
Disassembly and Assembly, "Accessory Drive - Remove and Install".
d. Remove the fuel injection pump gear. Refer to Disassembly and Assembly, "Fuel Pump
Gear - Remove".
e. Remove the valve mechanism cover. Refer to Disassembly and Assembly, "Valve
Mechanism Cover - Remove and Install".
Note: Care must be taken in order to ensure that the fuel injection pump timing is not lost
during the removal of the fuel pump gear. Carefully follow the procedure in order to remove
the fuel pump gear.
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
Alignment of timing marks
1. Ensure that Tooling (A) is installed into hole (X) in the camshaft gear. Use Tooling (A) in
order to lock the camshaft in the correct position.
Note: Ensure that the gears are marked in order to show alignment. Refer to Illustration 1.
2. Ensure that Tooling (B) is installed in ho