Deutz 914 Spécifications télécharger pdf (Page 12)

Hydraulic System Functioning

The diesel engine drives the single stage pump at a setting of 1800 rpm. The

pump draws hydraulic fluid from the tank and delivers hydraulic fluid up to

2500 psi on the pressure line, adjustable at the relief valve. The pump

delivers 47 gpm at 1800 rpm, and 66 gpm at the engine's maximum speed of

2500 rpm.

The engine is controlled by the hydro-throttle, which opens the throttle as

the load increases.

When the bypass valve is opened, the relief valve is vented directly back to

tank - output pressure is not available.

The 2500 psi setting is the maximum recommended output pressure for the

standard pump. Theoretically the unit could produce more at full engine

rated output, but pump life will be shortened, possibly dramatically.

The unit is slightly overpowered for long service life. Exceeding the factory

set pressures is not recommended.

Cooling is provided on the return line with an oversized air to oil cooler. The

cooler is capable of removing nearly half the entire horsepower rating in

heat, so keeping hydraulic temperatures low for safety and for system

longevity is easily achieved with a reasonable flow of cooling air.

Controlling the temperature is done by manually adjusting the flow rate of

oil to the fan motor while observing the thermometer in the sight gage

mounted on the tank.

Full filtration is provided on the return line. The filter is mounted on the top

of the tank, and has a filter condition indicator mounted on the side of the

filter housing. The condition indicator shows when the filter is operating

properly, is bypassing (dirty filter), or is missing. Keeping the filter in good

condition is strongly recommended, as dirt in the system will increase wear

in the pump, valving and connected tongs or other hydraulic tools.

Hoses and fittings have JIC swivel connections, SAE flange connections, or

NPT connections. There is a shutoff valve on the tank so it can be drained

and serviced.

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Deutz 914 Spécifications Page 12