Specifications

GOLDCUP CONTROLS SECONDARY CONTROLS
ASSEMBLY
See S23-12299
Cross center control S23-12299
One side center controls
See S23-12298, S23-12300
ALL CONTROLS
1. Apply loctite pipe sealant and install plugs (12) in body. Torque to 25 in.-lb. (2.8
Nm)
2. Press dowel pin (9) into the .125” (3.18mm) dia. hole directly over the centerline of
the 7/16” (11.1mm) diameter spool bore of the cover plate (10). Press to .125”
(3.18mm) below the surface, being careful not to mar the surface.
3. Press spring pin (11) into the stepped bore from the end of the body. The end of
the spring pin must be positioned 1.00” (25.4mm) below the spotface.
4. Install the two spools (18) into the 7/16” (11.1 mm) bore that has the spring pin
passing through it. The end of the spools having the drilled hole should extend
towards the outer edge of the cover plate. Install the two springs (19) into the installed
spools (18). Install the two O-rings (20) and the two plugs (21).
5. In the remaining bore, install one spacer (22) against the dowel pin (9). The
tetraseal groove and tapped hole should be facing towards the outer end of the bore.
Place the tetraseal (23) into the bore and slide it past the cross drilled hole and up
against the spacer (22). Drop the ring (24) down against the tetraseal (23). Using a
squared end rod slightly smaller than the bore, push the tetraseal onto the shoulder
groove of the spacer (22). Fill the bore with hydraulic fluid and install spool (25), dis-
placing the hydraulic fluid, to insure an air free cavity under the spool.
6. Press dowel pin (13) into body (27), using care not to damage the surface. Center
the pin in the body. If the pin protrudes, carefully grind flush to clear fitting (26).
7. Slip pin (14) into body (27).
8. Install O-rings (29) in fitting (26) and insert body (27). Thread into bore on top of
spool (25), with open port of fitting (26) toward center of control. Torque to 15 lbs-ft..
(20.3 Nm).
9. Repeat steps 5 thru 8 on other end of bore.
10. Install spool (18) and spring (19) on one side only per chart below.
11. Complete steps 5 thru 8 on one side only per chart below. Install spool (18) on
opposite side of this bore, then install plug (21) with O-ring (20).
*Note: Torque limiter is mounted on the opposite side from the input control.
12. Install strainer ass’y (28) piloted over the spring pin (11). Push the O-ring (30)
down against the assembled filter and install the retainer (31). The tapered end must
rest against the O-ring. Install the spring (32) into the tapered socket of the retainer
(31) and install the O-ring (33) and the plug (34).
13. Install the two #10-32 socket setscrews (35). Bottom these screws out lightly, then
back out approximately two turns. Install nuts (36), O-ring (37), plug (15) and O-rings
(16).
14. Install the 1/4-20 socket set screws (44). Bottom these screws out lightly, then
back out approximately 1-3/4 turns. Install nuts (38) with O-ring (30), plugs (15) and
O-ring (16).
15. Install O-ring in groove of shear seal (7). Install shear seal with O-ring in the large
hole on the servo link, on the servo shaft side. Be certain that the shear seal is sitting
with the flange flush against the servo link surface.
16. Install needle bearing (8) over servo shaft and seat against the servo link. Install
thrust washer (45) over needle bearing.
17. Install O-ring (4) in the second groove from the end of the shaft, using installation
tool T-1.
18. Install the servo shaft assembly in the cover plate. (10).
19. Install retaining ring (3) into the groove of the servo shaft extending through the
cover plate.
20. Place two spring washers (40), nested with the bent sections matching each other,
into the large hole in the servo link.
21. Place washer (43) against the spring washers.
22. Install O-ring into groove in the remaining shear seal (41). Note: This shear seal
does not contain the two tapered grooves in the face. Place on top of washer (43).
Position shear seal to match the lip on the servo link.
23. Place servo link against a solid object and press indicator (39) on the servo shaft
end. Align the pointer line on the indicator with the scribed line across the shaft.
102
Pump Rotation & Input Location of T. L. parts
Control mtg.*
CW-B, CCW-A See S23-12298
CW-A, CCW-B See S23-12300
Note: The shear seal will fit in one position only. Otherwise one side will be held up
by the lip of the servo link. Shear seal (7) must be installed to face against the cover
plate (10). This shear seal contains two variable width slots. The width and depth are
critical to accuracy of control.