
CONTROLS
26
PORT SIZES
......................DESCRIPTION ........................................................................................P07 C MOD . . . . .P110 C MOD
PORT C1 ......OFF-STROKE CYLINDER GAGE................................................................SAE-4 . . . . . . . . .1/4 BSPP
PORT C2 ......ON-STROKE CYLINDER GAGE..................................................................SAE-4 . . . . . . . . .1/4 BSPP
PORT D ........CASE DRAIN ..............................................................................................SAE-20 . . . . . . . .1-1/4 BSPP
PORT D1 ......CASE DRAIN ..............................................................................................SAE-20 . . . . . . . .1-1/4 BSPP
PORT DG......DRAIN GAGE, AIR BLEED PORT ..............................................................SAE-4 . . . . . . . . .3/8 BSPP
PORT AG......INLET GAGE ................................................................................................SAE-4 . . . . . . . . .1/4 BSPP
PORT BG......SYSTEM GAGE ............................................................................................SAE-4 . . . . . . . . .1/4 BSPP
PORT BG1....ALTERNATE SYSTEM GAGE......................................................................SAE-6 . . . . . . . . .1/4 BSPP
PORT E ........ELECTROHYDRAULIC STROKER SERVO SUPPLY ................................SAE-4 . . . . . . . . .1/4 BSPP
PORT H ........HYDRAULIC STROKER SIGNAL................................................................SAE-4 . . . . . . . . .1/4 BSPP
PORT LS ....LOAD SENSING LINE..................................................................................SAE-4 . . . . . . . . .1/4 BSPP
PORT V ........COMPENSATOR, TORQUE LIMITER, LOAD SENSING VENT ................SAE-8 . . . . . . . . .3/8 BSPP
PORT V1 ......SERVO VENT ..............................................................................................SAE-4 . . . . . . . . .1/4 BSPP
PORT X ........SERVO SUPPLY ..........................................................................................SAE-6 . . . . . . . . .3/8 BSPP
PORT XG ......SERVO GAGE ............................................................................................SAE-10 . . . . . . . .1/2 BSPP
HYDRAULIC STROKER
In the hydraulic stroker, a spring loaded piston is attached to the pin. A control pressure of 50 psi, 3,45 bar causes the
piston to commence to move against the spring, to position the pin in proportion to the control pressure, and thus
cause the pump to stroke in proportion to control pressure. Full displacement is achieved at 225 psi, 15,5 bar.
ELECTRIC STROKER
By mounting an electrically modulated pressure control valve on the hydraulic stroker to establish the control pressure,
pump displacement is controlled by an electrical signal. For a 24 volt coil, the pump commences to stroke at approxi-
mately 175 mA electrical signal, and will be at full displacement at approximately 275 mA.
PRESSURE COMPENSATOR AND TORQUE LIMITER OVERRIDE
An override pressure compensator or a torque limiter control mounts on the smaller diameter of the control piston,
opposite the servo, hydraulic or electric stroker. In the normal position, the spool in the override control connects this
piston to the control valve on the opposite side, allowing control by the stroker. When system pressure or torque
exceed the override setting, this spool connects system pressure to the smaller diameter control piston, to override the
rotary servo, hydraulic or electric stroker command and reduce displacement according to the compensator or torque
limiter setting. Override pressure must be sufficient to overcome servo pressure acting on the larger diameter piston.
TIGHTENING TORQUE FOR HYDRAULIC PLUGS
PORT SIZE
ft-lbs
Nm
SAE-4
11
15
SAE-6
18
24
SAE-8
46
62
SAE-10
75
102
SAE-14
130
175
SAE-16
135
183
1/4 BSPP
18
24
3/8 BSPP
18
24
1/2 BSPP
93
126
1” BSPP
146
198
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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 ...
Страница 55: ...PQ HIGH RESPONSE CONTROL 55 PQ CONTROL IN PROCESS OF DEVELOPMENT www comoso com ...
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 ...