Flow Test Procedures - Stanley MB656 User Manual

The correct performance of this procedure will verify if
the auxiliary circuit of the carrier is adequate to properly
operate a Stanley attachment.
This procedure is generic in form. It is the end users
responsibility to ensure that this procedure will work with
his specific type of equipment.
If an adequate flow meter is not available contact your
Stanley Hydraulic Distributor for assistance.
TEST PROCEDURE
1. With the auxiliary circuit (or kit) completely installed
connect the flow meter between the tool inlet and
outlet hoses.
NOTE:
Always use the hoses that are supplied for the
attachment and make sure the machine hydraulic
oil is between 90 to 120 °F. This will assure correct
readings and adjustments.
2. With the machine setting at the mode that's going to
be used to operate the attachment record the GPM
_____.
Locate the correct flow for the attachment in the
manual under the specification section. Adjust the
machine to the correct GPM.
NOTE:
If possible, always set the machine to the highest
GPM output mode. This will prevent the operator
from over flowing the attachments.
3. Once the correct GPM flow is achieved fully open
the restrictor on the flow meter.
4. With the machine in the attachment mode set
in step 2, record the back pressure. At this point,
the pressure reading on the pressure gauge is the
back pressure in the circuit. This pressure must not
exceed 200 psi/13.5 bar.
Excessive back pressure will slow the attachments
operation and lead to premature seal failures and
over heating.
Record the back-pressure
24 ► MB656 User Manual

FLOW TEST PROCEDURES

psi.
5. Close the restrictor valve on the flow meter until
the attachment relief starts to crack or open. The
relief valve opens when the flow rate (GPM),
indicated on the flow meter begins to decline rapidly.
Locate the tools operating system relief pressure
in the specification section in the manual. Adjust
attachment relief to specification.
NOTE:
The relief valve pressure must be greater than the
operating pressure of the attachment and three
times the back pressure. Never use the relief valve
to control the flow rate in the circuit. Cracking
pressure means the loss of 4 or more GPM.
Record the relief cracking pressure
Example:
Operation pressure of a breaker is 2700 psi. Back
pressure is 150 psi. A good rule to follow when setting
the relief is to multiply the back pressure by 3, then add
this number to the operation pressure of the attachment.
Operating Pressure
Back-pressure
Operating pressure of the tool
The relief valve setting must be greater than the
estimated operating pressure of the tool. If the setting
is lower, damage to the circuit may occur. Excess heat
will be generated in the circuit which will damage the
attachment and carrier.
psi.
2700 psi
450 psi
3150 psi