16
17
SERVICING INLET VALVE
Refer to Fig. 18 & 30
1
. Using a lightweight hammer, loosen then screw the suction nut (187-
084) off of the cylinder (187-095). See Fig. 21
2.
Remove the inlet seat (187-036), O-ring (106-008), inlet
ball (187-092) and inlet retainer (187-075) with O-ring (106-013).
See Fig. 18
3
. Clean all parts and inspect them for wear or damage,
replacing parts as needed. Old O-rings should be replaced
with new ones.
NOTE: Inlet seat (187-036) is reversible.
4
. Clean inside of cylinder (187-095).
5.
Reassemble the valve and screw it onto the fluid body if
no further service is needed.
SERVICING OUTLET VALVE
Refer to Fig. 19 & 30
1.
Complete all steps of the Fluid Pump Disconnect procedure on page
16.
2.
Screw the suction nut (187-084) off the pump and remove inlet valve
assembly.
3.
Using the rod collar tool, loosen the packing nut and push the piston
down and out of the fluid body.
4.
Place piston holder (187-248) in a vise. Slide the piston
into the holder and lock in place with a 1/4" pin (187-250).
5.
Clean all parts and inspect them carefully for wear or
damage. Inspect the outside of the piston rod for scoring or
wear. Replace these parts if needed. A worn piston rod will
cause premature wear of packings.
6
. Using a 3/8" allen wrench to unscrew the retainer (187-051) from the
piston extension (187-314).
7
. Remove the outlet seat (187-061), O-ring (106-021), outlet ball
(115-022) and outlet retainer (187-062).
8
. Inspect the outlet ball and seat for wear. Replace as required.
NOTE: Outlet seat (187-061) is reversible.
9.
Install parts back into piston rod as per Fig. 19. Place
two drops of loctite No. 242 (blue) on threads of the
retainer before assembling and torque to 20 ft-lbs.
SERVICING INLET & OUTLET VALVES
FIG. 18
FIG. 19
Part No. Table for Figures 18
thru 21 is located on page 20.
24
2
25
26
27
28
29
30
31
5
18
20
19
21
22
187-248
187-250
17
