SEQUENCE VALVE TEST (CONT)
(Sheet 3 of 4)
Needle valve (2)
Slowly open until the pressure read on gage (5)
is 200 psi (14.1 Kg/cm2). Gage (3) must read
0 psi, (0 Kg/cm2) (0 kPa).
Continue to open slowly to increase the pres-
sure read on gage (5), at a rate of 10 psi (0.7
Kg/cm2) at a time.
Sequence valve (7)
Will move against the force of its spring (open)
when the pressure gage (5) is 265 to 275 psi
(18.1 to 19.3 Kg/cm2). This will allow
oil to flow through a passage in valve body
to gage (3). At this time, gage (3) will indicate
the pressure read on gage (5).
If the needles of the pressure gages move back
SCHEMATIC OF TEST PROCEDURE
and forth (flutter) while the test is performed, 1.
loosen the fitting on gage (3) so there is a small
amount of leakage.
Body of sequence and
pressure control valve
7. Sequence valve
Go on to Sheet 4