Milton CAT 320E L - Manual (Page 7)

Front Linkage
Made for high stress and long service life
Booms and Sticks
The 320E is offered with a range of booms and sticks (see list below). Each is built with internal baffle plates for added
durability, and each undergoes ultrasound inspection to ensure weld quality and reliability.
Large box-section structures with thick, multi-plate fabrications, castings, and forgings are used in high-stress areas such
as the boom nose, boom foot, boom cylinder, and stick foot to improve durability.
The boom nose pin retention method is a durable captured flag design. Boom durability is improved with a number of plate
thickness changes. Also, the front linkage pins’ inner bearing surfaces are welded, and a self-lubricated bearing is used to
extend service intervals and increase uptime.
Selections
There are three basic boom options: HD, ES, and SLR. Sticks match the boom descriptions and applications below:
• HD = Heavy Duty – This type of boom is designed to balance reach, digging force, and bucket capacity. It covers the vast
majority of applications such as digging, loading, trenching, and working with hydraulic tools.
• ES = Extreme Service – This type of boom is best used for demolition or extreme applications where stress loads on the
boom are increased. It should be used for demanding, harsh applications like 100% rock and extensive hammer use.
• SLR = Super Long Reach – This front offers reaches to over 51 feet. It is well suited for ditch cleaning applications.
7