Specifications

GOLDCUP CONTROLS SERIES 900
See Figure 8A-1
See Figure 9A
2. Thread trimmer locknut (22) all the way onto trimmer screw (23). Slip back-up
washer (21), small dia. first, onto trimmer screw and against locknut. Using a 3/4-16
hex nut with a 1.030” (26.2mm) dia. x .030/.035” (0.76/0.89mm) deep c’bore, crimp the
washer onto the stop. Washer must be free to rotate slightly. Remove crimping nut.
3. Compress spring (4) solid in order to remove spring set. This may be safely
accomplished using a 1/4” (6.35 mm) dia. bolt, nut and washers.
4. Assemble retaining ring (2), guide (3), spring (4) and guide (3) onto spool (1).
5. Tighten nut (7) till it just starts to load the spring, then tighten 2-5/6 additional turns.
6. Install locknut (5) onto spool and lock against nut (7) without changing adjustment.
7. Insert spool assembly (11), spring end first, into trimmer screw (23). Compress
snap ring on the spool assembly until it snaps into internal groove inside trimmer
screw. See that it is securely seated.
8. Thread spring stop locknut (24) all the way onto adjusting spring stop (25). Slip
back-up washer (26), small diameter first, onto stop and against locknut. Using a 9/16-
18 hex nut with a .810/.815” (20.6/20.7mm) dia. x .030-.035” (0.76-0.89mm) dp. c’bore,
crimp washer onto stop. Washer must be free to rotate slightly. Remove the crimping
nut.
9. Install O-ring (35) on plug (34) and insert into spring stop (25). Install O-ring (27)
onto stop (25) and against washer (26).
10. Thread adjusting spring stop (25) into trimmer screw (23) until it just touches the
spool assembly. Be sure spool assembly is against snap ring.
11. Determine the correct position of the spool assembly in the valve body. For 9A
standard pump controls, and for 9A motor controls mounted on the “B” port side, the
spool assembly is installed in the side of the control cap containing the 1/8” pipe plug
(12). For controls used on P*R pumps, and motor controls mounted on the “A” port
side, the spool assembly is installed on the side opposite the 1/8” pipe plug (12).
12. Place O-ring (14) on trimmer screw (23) and thread assembly into the cover plate,
as noted above.
13. Install adjusting screw (15) in plug (13). Install O-ring (14) on plug. Thread adjust-
ing screw in until it protrudes approximately 1/2” from top of plug (13). For motor con-
trols, install two nuts (36) on the inner end.
14. Thread cover nut (16) with O-ring (31) onto adjusting screw.
15. Install plug (28) and O-ring (29) into cover nut (16).
16. Install this assembly in body on the opposite side from the spool assembly (11).
17. Install nut (36) on adjusting screw (6). Thread adjusting screw into stop (25).
18. Install roll pins (30) into drilled holes in surface of cover, being careful not to dam-
age surface.
19. Install 0-ring (7) in groove of shear seal (8).
20. Install shear seal with o-ring in 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.
21. Install thrust bearing (9) over servo shaft and seat against the servo link.
22. Slip washer (33) over the servo shaft and against the thrust bearing.
23. Using installation tool T-1, install O-ring (5) in the second groove from the end of
the shaft (1). Warm glyd ring (20) to make it pliable, and install over O-ring (5).
24. Install the servo shaft assembly in the cover plate (10). Pin must engage slot in
spool assembly (11).
25. Install retaining ring (4) into the groove of the servo shaft extending thru the cover
plate.
26. Apply loctite® 271 on threads of screw (43), and on threads of shaft assembly (1).
Assemble nut (44) on screw, insert screw into shaft assembly and turn in snugly. Hold
screw and arm. Torque nut to 14 lb.-ft. (19 Nm).
27. Place two spring washers (17), nested with the bent sections matching each other,
into the large hole in the servo link.
88
CONTROL SPOOL POS.
MODEL LOCATION REF. FIG. 9A
P*P, P*V, P*S “A” OR “B” OPPOSITE
P*R “A” OR “B” AS SHOWN
M*H, M*V “A” AS SHOWN
M*H, M*V “B” OPPOSITE
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 (8) must be installed to face against the cover
plate (10). This shear seal (8) differs from shear seal (18) in that the face surface is
machined with two .094” (2.4mm) radius scallops.