Specifications

GOLDCUP CONTROLS SERIES 800
See Figure 8A-1
SPRING SETTING
See Figure 8A
3. Compress spring (4) solid in order to remove spring set. This may be safely
accomplished by using a 1/4" (6.35 mm) dia. bolt through the center of the spring.
4. Assemble retaining ring (2), guide (3), spring (4) and guide (6) onto spool (1).
5. Tighten nut (7) till it just starts to load the spring, then tighten the required number
of turns to obtain desired preload, as indicated.
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 8A
standard pump controls, and for 8A 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), as
shown in Fig. 8A.
12. Place O-ring (14) on trimmer screw (23) and thread assembly into the cover plate,
as noted above.
13. Install 0-ring (7) in groove of shear seal (8).
14. 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.
15 Install thrust bearing (9) over servo shaft and seat against the servo link.
16. Slip washer (33) over the servo shaft and against the thrust bearing.
17. 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).
18. Install the servo shaft assembly in the cover plate (10). Pin must engage slot in
spool assembly (11).
19. Install retaining ring (4) into the groove of the servo shaft extending thru the cover
plate.
20. 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 other end.
21. Thread cover nut (16) with O-ring (31) onto adjusting screw.
22. Install plug (28) and O-ring (29) into cover nut (16).
23. Install this assembly in body on the opposite side from the spool assembly (11).
24. Install nut (36) on adjusting screw (6). Thread adjusting screw into stop (25).
25. Install roll pins (30) into drilled holes in surface of cover. Caution! do not damage
72
Control Feature Turns Past Contact
00 (PUMP) 2
01 (PUMP) 1-1/2
02 (PUMP) 2-1/2
03 (PUMP) 3-2/3
04 (PUMP) 2-5/6
0* (MOTOR) 2
1* (MOTOR) 6-1/6
Pump or Motor Control Spool Position
Model Location Ref. Fig. 8A
P*P, P*V, P*S "A" or "B" Opposite shown
P6R, P7R, P8R "A" or "B" As shown
M*H, M*V "A" As shown
M*H, M*V "B" Opposite shown
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.