Stanley MB556, User Manual

MB556 

User

 Manual ◄ 25

DEFINITIONS

Tool:

The hydraulic attachment which the auxiliary circuit is intended to power. These 

may include hydraulic breakers, compactors, shears, etc.

Operating Pressure:

That pressure at which the tool will naturally operate without influence of outside 

pressure relief mechanisms. This pressure is an operating characteristic of the tool 

and cannot be altered by the end user without changing the tool design.

Relief Pressure:

The relief pressure is that pressure at which the circuit will dump fluid in order to 

protect itself from damage.

Back Pressure:

The pressure at the tool’s connection to the return circuit of the carrier.

Flow Meter:

Instrument for testing the operating characteristics of a hydraulic circuit. The data 

usually available from this device are pressure (psi/bar), flow (GPM/LPM) and 

temperature (°F/°C).

Restrictor Valve:

A valve on the flow meter which allows the user to simulate an operating tool by 

adding a pressure load (through restriction) to the circuit. This feature is used to 

evaluate relief settings and flow ratings at pressure.

V60/V65/V100 Valves:

A priority flow control valve manufactured by STANLEY. Allows for optimum opera

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tion of any attachment by providing the proper amount of flow for operation of 

the tool the “priority” aspect allows the attachment to function properly if another 

control function is activated.

Inlet Flow:

The hydraulic oil supplied to the “IN” port of the tool or valve.

Regulated Flow:

The flow of oil supplied to the tool by the V60/V100 valve.

By-Pass Flow:

The oil flow that is supplied by the carriers pump, but not used in the operation of 

the attachment. By-pass flow equals inlet flow (to the valve) minus the regulated 

flow.

Pressure Line:

The hydraulic line(s) which supply pressurized oil from the pump to the valve or 

tool.

Return Line:

The hydraulic line which connects the “OUT” port of the tool to the tank circuit of 

the carrier.

Cracking Pressure:

The pressure at which the relief valve starts to open. Can be seen by a drop in the 

flow rate as shown by the flow meter.

Full Open Pressure:

The pressure at which the relief valve is completely open dumping all system flow 

to the tank.

Ambient Air Temperature:

The temperature of the outside air.

Stabilized Temperature:

The temperature at which the carrier hydraulic system temperature will stop rising 

during testing or operation.