Sharp WQ-700H Specifications Page 27
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GOLDCUP CONTROLS SERIES 500
CODE 5A - ELECTRIC
STROKER
S23-12413 - 5A* 00 (with deadband)
S23-12415 - 5A* 01 (no deadband)
S23-12419 - 5A* - A Mtg., Motor
S23-12418 - 5A* - B Mtg., Motor
DESCRIPTION
NULL ADJUSTMENT:
PROCEDURE FOR CLEANING
FILTER
See Figure 5A
This control is used on both pumps and motors. The rotary servo input shaft is actuat-
ed by a hydraulic spool. A jet pipe is directed to two receiver orifices connecting to
opposite ends of the hydraulic spool. The jet pipe is mechanically centered by a null
adjust spring opposed by a feedback spring linked to spool position. A “voice coil”
attached to the jet pipe creates an unbalance force in proportion to electrical current
magnitude and direction. This causes the jet pipe to offset, increasing pressure on the
one receiver and lowering pressure on the other receiver. The hydraulic spool re-
sponds causing the feedback spring to oppose the force, until the jet pipe is again cen-
tered at a new position of the servo.
When servo pressure to the jet pipe is blocked, the rotary servo spring centers and
may be manually positioned.
Motor controls are configured to be offset to full stroke with zero signal, and 1/3 stroke
with full signal. A spring in the rotary servo body biases the control to this position.
Cross center pump controls come in two versions. One version (feature 00) requires a
small signal (deadband) prior to commencing stroke in either direction. The feature 01
control has no deadband.
If control functions over its full range, but pump remains on stroke when there is no
electrical signal, adjustment of null position is indicated.
1. Load pump. Set compensator to 1000 psi (69 bar). Shut off external servo supply
to control.
2. If system contains a shuttle valve, disable the shuttle valve as follows:. If shuttle is
on the pump, turn the shuttle relief adjustment two turns in. If it is a Denison shuttle
mounted on the motor, remove shuttle and plug the two threaded ports with 3/8-24
setscrews. Re-install the valve.
3. Adjust and lock the trimmer for minimum system pressure on both ports. Connect a
handle to the .375” (9.52 mm) dia. shaft extension on the stroker. Stroke the pump
both sides of center. Do not exceed 100 lbs-in. (11.3 Nm) torque. Observe pressures
on system ports when handle is released. Continue adjustment till pressure on either
side is less than 150 psi (10.3 bar) difference.
4. To set jet pipe null adjustment, disconnect electrical signal and open servo oil supply
to stroker. (200 psi min., 1000 psi max.) (14 bar min., 69 bar max.). For pump con-
trols with deadband, rotate the jet pipe null adjustment CCW and CW to develop 700
psi (48 bar) on each system port. Caution: always begin adjustment by backing
out (CCW) on the jet pipe null adjustment and observing control reaction.
Overadjusting clockwise direction can damage the jet pipe or the trimmer
spring. Set and lock the screw midway between these two limits. Torque to 10 lbs-in.
(1.1 Nm) max. Install O-ring and cover nut.
5. For pump controls with no deadband, set and lock the jet pipe null adjustment at
the point of minimum system pressure on both ports with pump at operating tempera-
ture.
6. For motor controls, set and lock the jet pipe null adjustment to just before the con-
trol commences to destroke.
7. Connect electrical signal and zero the electrical driver “zero adjustment”.
8. Restore shuttle valve and system pressure settings to original operating conditions.
A screen in the servo inlet line to the stroker prevents particles from getting into the jet
pipe which might plug the jet pipe. In older models, this screen is behind the plug,
(13). Field service is not recommended, as contaminants are on the outside, and
could become dislodged in the servo body upon removal. In later models the screen is
behind the fitting supplying servo oil to the stroker, and contaminants are lodged
inside. With caution, it is possible to clean this filter as follows:
1. Disconnect servo tube line. Remove control from pump.
2. Remove plug (13).
3. Blow filtered air into the opening under the plug. Note if air escapes from the servo
connection.
4. Force filtered oil or a compatable solvent through the opening to flush contaminants
from the screen and out the servo inlet connection.
27
Note: This control is precision manufactured and requires training to properly
assemble or disassemble. Unless repair parts and factory trained personnel
are available, service should be limited to null adjustment.
- DENISON HYDRAULICS 1
- GOLDCUP CONTROLS CONTENTS 3
- See Figure 1 7
- GOLDCUP CONTROLS SERIES 100 9
- FIGURE 1 9
- See Figure 2A 10
- GOLDCUP CONTROLS SERIES 200 11
- PARTS LIST 12
- FIGURE 2A 13
- CYLINDER CONTROL 13
- S23-12329 13
- See Figure 2H 14
- S23-12358 16
- FIGURE 2H 17
- 3 POSITION CYLINDER 17
- ADJ. MAX. VOLUME STOPS 17
- See Figure 4A 18
- GOLDCUP CONTROLS SERIES 400 19
- For Figure 4A - Rotary servo 20
- FIGURE 4A 21
- ROTARY SERVO 21
- See Figure 4C 22
- ASSEMBLY 23
- S23-12343 - 4B* Fixed stops 25
- See Figure 5A 27
- GOLDCUP CONTROLS SERIES 500 28
- TEST, PUMP CONTROL 28
- TEST, MOTOR CONTROL 28
- S23-12346 32
- FIGURE 5A-1 33
- SPRING CENTERED WITH TRIMMER 33
- S23-12540 - 5A* A Mtg 34
- 23-12539 - 5A* B Mtg 34
- S23-12540 35
- See Figure 5C 36
- See Figure 5C-1 37
- See Figure 5-C 38
- DRAWING PAGE 41
- FIGURE 5C 41
- S23-12347 42
- FIGURE 5C-1 43
- BRAKE AND BYPASS VALVE 43
- See Figure 60 44
- See Figure 60-1 44
- GOLDCUP CONTROLS SERIES 600 46
- FIGURE 60 47
- HYDRAULIC STROKER 47
- For Figure 60-1 - Servo for 48
- See Figure 6A 49
- See Figure 6A-1 49
- PUMP CONTROL PRESSURE 51
- MOTOR CONTROL PRESSURE 51
- For figure 6A hydraulic 52
- See Figure 6B 54
- See Figure 6B-1 54
- FIGURE 6B 57
- WITH BRAKE AND BYPASS VALVE 57
- For Figure 6B-1 - Brake and 59
- FIGURE 6B-1 60
- See Figure 6C 61
- FIGURE 6C 64
- ADJUSTABLE STOPS 64
- See Figure 7 66
- GOLDCUP CONTROLS SERIES 700 67
- FINAL ADJUSTMENT AND TEST 67
- INSTALLATION OF ANTI-BACK 68
- LASH SPRING 68
- SK-15045 68
- FIGURE 7 70
- FEEDBACK FOR 700 SERIES HI IQ 70
- SERVO VALVE CONTROL 70
- See Figure 8A 71
- See Figure 8A-1 72
- GOLDCUP CONTROLS SERIES 800 74
- MOTOR CONTROL SPRING 74
- ADJUSTMENT 74
- See Figure 8C 78
- See Figure 8C-1 79
- See Figure 8C-2 79
- PUMP CONTROL SPRING 80
- S23-12820 82
- Feature 00 82
- FIGURE 8C 84
- See Figure 9A 87
- 9A CONTROL TEST SETUP 89
- 9A PUMP TEST 89
- 9A MOTOR TEST 89
- Figure 9A Electric stroker 91
- FIGURE 9A 93
- ELECTRIC STROKER 93
- See Figure 9C 94
- S23-12925 (Feature 00) 98
- GOLDCUP CONTROLS SERIES 900 100
- FIGURE 9C 100
- BYPASS VALVE 100
- See S23-12299 101
- One side center controls 102
- See S23-12298, S23-12300 102
- (1 SIDE OF CENTER) 105
- CW-B CCW-A 105
- S23-12298 105
- CONTROL TORQUE LIMITER 105
- (BOTH SIDES OF CENTER) 106
- S23-12299 106
- CW-A, CCW-B 107
- S23-12300 107
- For stroke indicator 109
- GOLDCUP CONTROLS SEAL KITS 110
- DEFINITION & UNIT 111
- FLUID POWER FORMULAS 111
- SALES AND SERVICE WORLDWIDE 116
- Printed in U.S.A 116
- OPI 2M 10203 116
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