
65
TEST PROCEDURE
ROTARY SERVO TEST
(continued
)
Plumb servo supply (5 gpm, 19 lpm minimum at 1500 psi, 103 bar maximum) to control port “X”.
Thread minimum displacement adjustment 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 servo differential adjustment screw in till solid, then seven turns out.
Start pump. Adjust rotary servo shaft till pump is at some displacement between zero and full. Adjust differential pres-
sure by adjusting the differential screw until the difference in pressure readings between port XG and
V1 is 250 +/-10 psi, 17,2 +/- 0,7 bar. Install cover over differential adjustment. Remove gages and
plug gage ports.
With rotary servo shaft rotated fully clockwise, adjust maximum volume adjustment on servo until out-
put flow is at the full displacement position. Lock in place.
Fully rotate servo shaft counter-clockwise. Pump flow should go towards zero displacement. Back out minimum vol-
ume stop until pump is at zero displacement. Lock in place.
Rotate shaft clockwise and counterclockwise at various outlet pressures. Pump displacement should follow shaft rota-
tion between full and zero displacement smoothly and proportionally. Full to zero or zero to full displacement should be
achieved in no more than .3 second.
Proceed to
COMPENSATOR TEST (pg. 66), TORQUE LIMITER TEST (pg. 70),
or
FINAL PUMP TEST (pg. 75),
as
applicable.
ROTARY SERVO CONTROL CAP
TEST CIRCUIT
ROTARY SERVO WITH
COMPENSATOR OVERRIDE
minimum displacement adjustment, under plug
servo input
shaft
differential
adjustment
under cover
set maximum
displacement
gage port “V1”
servo port “X”
gage port “XG”
set
maximum
stroke
cylinder gage port “C2”
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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 ...
Страница 54: ...PQ HIGH RESPONSE CONTROL 54 PQ CONTROL IN PROCESS OF DEVELOPMENT www comoso com ...
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Страница 56: ...PQ HIGH RESPONSE CONTROL 56 PQ CONTROL IN PROCESS OF DEVELOPMENT www comoso com ...
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 ...