Service Repair Manual
Model: 330B EXCAVATOR 9HN
Configuration: ISJ HEX COMMONALITY CHART 9HN00001-UP (MACHINE)
Disassembly and Assembly
330B, 330B L & 330B LN EXCAVATORS MACHINE SYSTEMS
Media Number -SENR8973-02
Publication Date -01/10/2004
Date Updated -27/07/2016
SMCS - 4050-010; 4050-017
Remove & Install Final Drives
a. separate track assemblies
Fluid Spillage Containment
Care must be taken to ensure that the fluids are contained during performance of the inspection,
the maintenance, the testing, the adjusting and the repair of the machine. Be prepared to collect the
fluid with suitable containers before opening any compartment or disassembling any component
containing fluids. Refer to the "Tools And Shop Products Guide", NENG2500 for the tools and the
supplies suitable to collect and contain any of the fluids in Caterpillar machines. Dispose of the
fluids according to local regulations and mandates.
At operating temperature, the hydraulic oil is hot and under pressure.
Hot oil can cause burns. To prevent possible personal injury, release the
pressure in the implement hydraulic circuits (the boom, the stick and
the bucket) before any of the hydraulic lines or any of the components
are disconnected or removed.
1. Release the pressure in the hydraulic system as follows:
a. Fully retract the stick cylinder rod.
b. Adjust the position of the bucket so that it will be flat on the ground when the boom is lowered.
c. Lower the boom until the bucket is flat on the ground.
d. Shut off the engine and place key in the "ON" position. Put the hydraulic activation control
lever in the "UNLOCK" position.
e. Move the control levers for the boom, the stick and the swing to all full stroke positions. This
will release any pressure that might be present in the pilot system.
f. Return the key to "