Specifications

GOLDCUP CONTROLS SERIES 600
See Figure 60
TEST
PUMP CONTROL PRESSURE
7. Install O-ring (1-8) into groove in the remaining shear seal (1-7). Note: This shear
seal does not contain the two .094 radius scallops in the face. Place on top of washer,
(1-10). Position shear seal to match the lip on the servo link (1-3).
8. Install spool (13) in stroker body. Press dowel (9) into clamp (8) to .500” (12.7mm)
dimension shown. Install screw (4) in clamp. Slip clamp into body to engage groove in
spool (13). Slip servo shaft assembly through the body and through the clamp.
9. Tighten the clamp only enough to hold the clamp snugly against the bushing, while
permitting the shaft to turn in the clamp with light force.
10. Holding a flat plate against the ends of the spool bore, rotate the shaft clockwise
and counterclockwise, causing spool (13) to travel from flush one side to flush the
other side. Observe the position of the shear seal relative to the two 3/16 dowel holes
in the cover. Position such that the overlap is equal on each side. Eliminate end play
and torque screw (4) to 72 lbs-in. (8 Nm), locking the clamp to the shaft
11. Place washers (17) into end connection (2) Place spring (16) on washer. Insert
screw (21) into spring guide (14) and thread into end connection. Thread screw until
spring guide (14) extends .308” (7.82 mm). beyond mating surface of end conn. (2).
Thread nut (18) hand tight.
12. Place washer (15) and O-ring (22) in position as shown.
13. Using screws (26) bolt end connection (2) onto body (25). Torque to 14 lbs-ft. (19
Nm).
14. Install O-ring (19) on plug (20) and insert into end connection.
15. Repeat steps 11 thru 14 on other end.
16. Install cover (23) with cover screws (24) and O-ring (27). Torque screws to 14 lbs-
ft. (19 Nm).
17. If control is to be tested on pump, install on pump control pad with gasket (7), ref
Fig. 60-1, Nyltite washers (12), and screws (10). Torque to 30 lb. ft. (40.8 Nm).
Connect servo source, adjustable to 450 psi (31 bar), to control ports on hydraulic stro-
ker through a 4-way valve. Center position must dump both ports to tank at min. pres-
sure.
1. To set pump centering, remove plugs from ends of centering groups. Alternately
adjust screws by backing out on one slightly and turning in on the opposite screw the
same amount, (till it just contacts the spool), observing pump flow and pressure till
minimum flow and pressure are obtained and there is no backlash. Stroke pump to full
and release, on both sides of center. Pump shall return to zero stroke within 200 psi
(13.8 bar) max.
2. Apply servo pressure to one port of stroker. Adjust pressure from minimum to max-
imum. Note the pressure at which pump just starts to stroke, and the pressure at
which the pump reaches full stroke These pressures must be within the following val-
ues:
If pressures are incorrect, control may be disassembled and washers added or deleted
in the spring box on the opposite end. Each washer (17) added (or removed) increas-
es (or decreases) control pressure approximately 10 psi for 00 and 02 control features,
and 12 psi for the 01 control feature.
3. With minimum signal, pump shall return to zero stroke within 200 psi (13.8 bar)
max.
4. Repeat test on opposite side of center.
5. Increase and decrease control pressure between 0 and 450 psi (31 bar) several
times . Pump stroke should follow control pressure smoothly and proportionally. Full
to zero or zero to full stroke should be achieved in no more than two seconds. Adjust
control pressure up to 50% stroke from zero stroke, then adjust down from full stroke
to the same value. The control pressure at the two settings shall not vary more than
50 psi (3.4 bar) from each other.
45
Control Pressure Pressure
Feature Start Full
00 75± 15 psi 335± 25 psi
(5.2± 1 bar) (23.1±1.7 bar)
01 75± 15 psi 435± 25 psi
(5.2± 1 bar) (30± 1.7 bar)
02 100± 15 psi 375± 25 psi
(6.9± 1 bar)
(25.9± 1.7 bar)