
68
TEST PROCEDURE
HYDRAULIC STROKER TEST
Before testing hydraulic stroker, disable the compensator or torque limiter override, if applicable, by turning the com-
pensator differential adjustment fully in. (See compensator or torque limiter test).
CAUTION:
System must contain a
relief valve to limit outlet pressure. Outlet relief valve should be set to minimum pressure.
Plumb servo supply (5 gpm, 19 lpm minimum at 1500 psi, 103 bar maximum) to control port “X”. Plumb adjustable
hydraulic pressure (50 to 350 psi, 3,45 to 24 bar) to control port “H”.
Thread minimum displacement adjustment screw so that pump is on stroke.
Install gages on servo pressure gage port XG and on gage port V1, capable of measuring pressure difference to 10
psi, 0,69 bar. Gages must be adequate for servo pressure.
Turn hydraulic stroker differential adjustment screw in till solid, then out 7 turns.
Start pump. Apply hydraulic control signal to port “H” till pump is at some displacement between zero and full. Adjust
differential pressure by adjusting the differential screw until the difference in pressure readings between port XG and
V1 is 250 psi, 17,2 bar. Install cover over differential adjustment.
Set signal pressure to 50 psi, 3,45 bar. Back out zero volume stop and set zero flow adjustment until pump is at zero
displacement. Lock both adjustments in place.
Slowly increase and decrease signal pressure between 0 and 275 psi, 19,0 bar several times at minimum and maxi-
mum operating outlet pressure. Pump displacement should follow control pressure smoothly and proportionally.
Rapidly adjust signal pressure between 0 and 275 psi, 19,0 bar. Full to zero or zero to full displacement should be
achieved in no more than 0,3 second.
Proceed to
COMPENSATOR TEST (pg. 66), TORQUE LIMITER TEST (pg. 70),
or
FINAL PUMP TEST (pg. 75),
as
applicable.
HYDRAULIC STROKER
TEST CIRCUIT
HYDRAULIC STROKER
COMPENSATOR OVERRIDE
servo pressure
gage port “XG”
differential
adjustment
under cover
“V1”
control port “H”
P07
zero flow adjustment
cylinder gage port “C2”
minimum displacement adjustment, under plug
HYDRAULIC STROKER CAP
HYDRAULIC STROKER,
TORQUE LIMITER OVERRIDE
control port “H”
P110
servo pressure
port “X”
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Содержание P07 C-mod
Страница 12: ...PUMP PARTS LISTS 12 Ref Figure 1 Exploded view of pump with pressure compensator control www comoso com ...
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Страница 57: ...PQ HIGH RESPONSE CONTROL 57 PQ CONTROL IN PROCESS OF DEVELOPMENT www comoso com ...
Страница 74: ...74 TEST PROCEDURE PQ CONTROL IN PROCESS OF DEVELOPMENT www comoso com ...