It is important to dimension an optimum hydraulic system,
and to specify the correct pump size to provide sufficient
oil flow and prevent overloading of the power take-off.
Note: The body builder should enclose an information
binder, delivered with the truck, including hydraulic
system data (system dimensioning description and di-
mensioning criteria).
Service, function and safety descriptions should also be
enclosed.
Pipes, lines and hoses
Connected to the hydraulic pump are a high-pressure
hose, suction and drain lines.
When dimensioning the hydraulic system, it is important
that:
• Hoses and lines must be connected to the pump with
unions. Sealing rings must be used between pump and
union.
• Teflon tape or similar must not be used since pieces
can break off and get into the hydraulic system and
eventually cause damage.
• If steel piping is used, it must be installed so that move-
ments and vibrations do not cause leakage. Normally
hoses should be used nearest the pump.
• Oxide scale must be removed from pipes which have
been heat-bent or welded. Flush or blow the pipes
clean before installing them.
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