Specifications

GOLDCUP CONTROLS SECONDARY CONTROLS
TEST
When the pointer is towards the letter “O”, the link should be centered over the 1/8”
(3.18mm) dowel pin. Install screw (17).
24. To mount on pump, set the gap between the spacers which drive the servo arm to
.010” (0.254 mm) clearance with the arm. Slip servo arm between the two spacers
and align control with housing dowels. Install control on pump with screws (2), new
Nyltite washers (5), and gasket (42). Torque screws to 30 ft.-lb. (40.8 Nm). Install fit-
tings and tube lines to torque limiter control.
1. Use formula below to calculate (a) the flow with the pump at the maximum pres-
sure, and (b) the pressure with the pump at maximum stroke, for the desired power
setting at the test stand R.P.M.
HP = PxQ/(Eff.x1714)
Where P = Pressure in PSI
Q = flow in GPM
Example: 50=5000xQ/(.85 x 1714) (a) Q=14.6 GPM
50=Px46.8/(.85 x 1714) (b) P=1557 PSI
for 50 HP with maximum pressure 5000 PSI, maximum flow 46.8 GPM (Series 6 at
1800 RPM) and efficiency of 85% at these conditions.
or KW = PxQ/(Eff.x600)
where P = pressure in Bar
Q = flow in l/min.
Example: 50=345xQ/(.85 x 600) (a) Q=73.9 l/min.
50=Px177/(.85 x 600) (b) P=144 bar
for 50 KW with maximum pressure 345 bar, maximum flow 177 l/min. (Series 6 at 1800
RPM) and 85% efficiency at these conditions.
2. Set the test stand at the maximum pressure for the system. Set the pump compen-
sator above this value. Place the pump on stroke. If the pump does not meet the cal-
culated flow (a) for this pressure, back the torque adjusting screw out, till the pump
provides this flow. If the pump exceeds this flow, turn the torque adjusting screw in, till
the control limits at this flow.
3. Reduce the test stand pressure setting to the calculated value (b) for the pump at
full flow. Set the pump control to full stroke. If the pump fails to reach full flow, turn the
linearity screw in till the pump hits full flow. If the pump reaches full flow, back the lin-
earity screw out till the pump just commences to reduce stroke.
4. If linearity adjustment was required, repeat steps.
Chart for location of torque adjustment screws
(See S23-12298, S23-12299, S23-12300)
*Note: Torque limiter indicator rotation is opposite to servo rotation.
103
Note: Electric motor current may be used instead of the calculated values of pres-
sure and flow. In step 2, adjust the torque adjusting screw to obtain the motor
amperes at maximum pressure. In step 3, adjust the linearity screw to obtain the
same motor amperes at full flow.
*Servo Rot. Torque & Linearity Adj.
CW “E”
CCW “F”