JETStream 3000 series, Operation Manual, Page: 49 / 84

Bareshaft Pump
41
6. Slowly swing the manifold downward to the
manifold support rest. The weight of the mani-
fold is approximately:
• 3600/4200 Series: 165 lb. (75 kg)
• 3000 Series: 90 lb. (41 kg)
7. Use two small pry bars (Jetstream p/n 70179)
to pry the valve out of the manifold as shown
(Figure 66).
8. Remove the remaining valves. Refer to the
topics on valve service later in this chapter for
disassembly and maintenance instructions.
40K Face Seal Replacement
Because the valves on 40K manifolds do not have
exterior O-rings that seal the manifold to the pump
frame, the stuffing boxes contain a face seal to seal
the two surfaces. Perform the following to replace.
1. Press slightly behind the face seal using your
finger and gently pull the seal out (Figure 67).
2. Wipe the seal retaining area and inspect.
3. Apply O-ring lubricant to the entire area of the
new seal.
4. With the sealing lip facing away from the stuff-
ing box, press the new seal into place by hand
until seated.
5. Ensure the seal stays in place until the mani-
fold is in place and tightened.
!
CAUTION
Jetstream uni-valves must be lapped regular -
ly to minimize damage to the seating surfaces
and maximize valve life. Service intervals de
-
pend on many variables including water quality,
filter maintenance, and hourly usage. Refer to
“Valve Lapping” on page 50 for instructions.
!
CAUTION
Do not use hard metal tools such as screw-
drivers or picks to remove the face seal. Doing
so may cause damage to the stuffing box and
sealing surface to the point where the box must
be discarded.
STUFFING
BOX
FACE SEAL
Figure 66: Valve Removal.
Valves
Figure 67: Face Seal Removal.