JETStream X Series - Page 67

59
X-Series Waterblast Unit
6. Slowly swing the manifold downward to
the manifold support rest. The weight of
the manifold 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 in (Figure 104).
8. Remove the remaining valves. Refer to the
topics on valve service later in this chap-
ter 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 stufng boxes contain a
face seal to seal the two surfaces. Perform the
following to replace.
1. Press slightly behind the face seal using
your nger and gently pull the seal out
(Figure 105).
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
stufng box, press the new seal into place
by hand until seated.
5. Ensure the seal stays in place until the
manifold is in place and tightened.
!!
CAUTION
Jetstream uni-valves must be lapped regularly
to minimize damage to the seating surfaces and
maximize valve life. Service intervals depend
on many variables including water quality,
lter maintenance, and hourly usage. Refer to
“Valve Lapping” on page 68 for instructions.
!!
CAUTION
Do not use hard metal tools such as screwdrivers
or picks to remove the face seal. Doing so may
cause damage to the stufng box and sealing
surface to the point where the box must be
discarded.
STUFFING
BOX
FACE SEAL
Figure 104: Valve Removal.
Valves
Figure 105: Face Seal Removed.