JLG 4017 Service Manual - Manual (Page 26)

Boom
3.2 4017
3.1 BOOM SYSTEM COMPONENT
TERMINOLOGY
To understand the safety, operation and maintenance
information presented in this section, it is necessary that
the operator/mechanic be familiar with the name and
location of the major assemblies of the boom system. The
following illustration identifies the components that are
referred to throughout this section.
MZ0800
MZ0810
MZ0830
Extend/Retract
Cylinder
First Boom
Section
Auxiliary
Quick
Connects
Tilt Cylinder
Second Boom
Section
Third Boom
Section
Fourth Boom
Section
Hose Carrier
Extend Chains
(two pair)
Bottom View
Quick Switch Assembly
Rear View
Retract Chains
(three)