Stellar 4500 Manual
8-1
Chapter 8 - Hydraulics - Electrical
Release system pressure before attempting to
make adjustments or repairs.
Hydraulic fluid expands when heated. This raises
the pressure in an unventilated tank. Release the
tank pressure before removing the cap
completely. Failure to do so may cause the oil to
shoot out of the tank very rapidly and cause
severe burns.
Warning! If hydraulic fluid escapes, the boom or
crane can fall immediately. Make sure the ground
or blocking is supporting the boom before
performing any maintenance or repair. Do not
rely on the hydraulic fluid to support the boom or
crane.
Contaminants in a hydraulic system affect
operation and will result in serious damage to the
system components. Dirty hydraulic systems are
a major cause of component failures.
If evidence of foreign particles is found in the
hydraulic system, flush the system.
Disassemble and assemble hydraulic
components on a clean surface.
Clean all metal parts in a nonflammable cleaning
fluid. Then lubricate all components to aid in
assembly.
When installing metal hydraulic tubes, tighten all
bolts finger tight. Then , in order, tighten the bolts
at the rigid end, the adjustable end, and the
mounting brackets. After tubes are mounted,
install the hoses. Connect both ends of the hose
with all bolts finger tight. Position the hose so it
does not rub the machine or another hose and
has a minimum of bending and twisting. Tighten
bolts in both couplings.
Due to manufacturing methods, there is a natural
curvature to a hydraulic hose. The hose should
be installed so any bend is with this curvature.
Please Read the Following Carefully! This
portion of the manual contains information
regarding the Hydraulic/Electrical system of all
Stellar manufactured articulating cranes. Some
items contained within this chapter may not
apply to your specific equipment.
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