14 Mart 2015 Cumartesi

Dimensioning of hydraulic system and hydraulic pumps

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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