Flow Test Procedure - Stanley HSX Series 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
their specific type of equipment.
If an adequate flow meter is not available, contact your
STANLEY 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 ______ 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.
12 ► HSX User Manual

FLOW TEST PROCEDURE

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 _____ psi.
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.
Heat Load Test
With the installation kit properly installed and adjusted,
per the above procedure, conduct the head load test as
follows.
1. Connect the flow meter between the tool inlet and
outlet hoses.
2. With the carrier set in the attachment mode, restrict
the flow meter until a pressure of 1000 psi is achieved.
This pressure must be maintained throughout the
heat test.
Note: Closing of the restrictor may be required as the
temperature increases.
Monitor the oil temperature from the flow meter until
no change is noted. Record the time required for oil to
stabilize. Record the surrounding temperature (ambient
temperature). Record the time required to stabilize ______
minutes.
Record the stabilized oil temperature ______F.
Record the ambient temperature ______ F.
The "heat rise" is calculated as the stabilized temperature
minus the ambient temperature.
2700 psi
450 psi
3150 psi