Service Repair Manual
320D and 320D L Excavator
Model: 320D EXCAVATOR JGZ
Configuration: 320D & 320D L Excavators JGZ00001-UP (MACHINE) POWERED BY 3066 Engine
Disassembly and Assembly
320D Excavator Machine Systems
Media Number -RENR8614-14
Publication Date -01/05/2013
Date Updated -19/07/2017
Boom Cylinder - Remove and Install
SMCS - 5456-010
Tool Part Number Part Description Qty
Pin Driver Cap
Cylinders equipped with lock valves can remain pressurized for very
long periods of time, even with the hoses removed.
Failure to relieve pressure before removing a lock valve or
disassembling a cylinder can result in personal injury or death.
Ensure all pressure is relieved before removing a lock valve or
disassembling a cylinder.
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
Refer to Special Publication, NENG2500, "Dealer Service Tool
Catalog" for tools and supplies suitable to collect and contain fluids on
Dispose of all fluids according to local regulations and mandates.
1. Fully extend the bucket cylinder. Fully extend the stick cylinder. Lower the boom until the
stick assembly is in contact with the ground.
2. Release the pressure in the hydraulic system. Refer to Disassembly and Assembly, "Hydraulic
System Pressure - Release".
3. Loosen nut (1). Turn bolt (2) counterclockwise to release the pressure in the cylinder.