Product Manual

Plunger Pumps
Operating Instructions and Parts Manual RMW Series Pumps
Figure 15
Service Pumps (Continued)
7. Put a thin coat of oil
on the plungers and
packings. (See fi gure
15)
8. Carefully install the
manifold and torque
the bolt to the proper
specifi cations. (See fi gure
16) (See Table C or parts
breakdown)
Valve life is dependant
on many variables. Hard
water, cavitation, corrosion,
chemicals and equipment
care. The valves are a wear item
and need periodic replacement.
Worn O-rings or damaged valves will
cause pressure loss and pulsations.
Servicing the Packings/Seals
Packings:
Disassembly:
To access the water seals for inspection or
replacement, you will fi rst need to remove
the head of the pump.
NOTE: It is important to make note of
the order in which the components of the
packing stack are arranged and facing
during disassembly.
1. Remove the head bolts.
2. Insert small pry bars between the
head and body at opposite corners
and apply pressure down on one pry
bar and up on the
other pry bar. (See
fi gure 17)
3. Lift the head up and
away from the body.
NOTE: The packing
stacks will not always
stay in the head of the pump
when it is removed. Sometimes
one or more components of the
packing stack will come out of the
head and stay on the plunger.
4. To remove any
components that
stay on the plungers
simply twist back and
forth while pulling up.
(See fi gure 18)
5. Remove low pressure
seals insert screwdriver
under seal lip and lift
up. (See Figure 19)
6. Remove the piston guides
from the head by using a reverse
plier (preferably rubber coated)
inserted into the center of the
piston guide.
7. Use a back and forth twisting
motion while pulling up
(clockwise and counterclockwise).
8. Another method is to use a two-
prong slide hammer puller. Insert
the prongs into the piston guide
allowing the prongs to grab under
the support ring then use the
Figure 17
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
Figure 19
.
Figure 18
Figure 16
Plunger Pumps
Operating Instructions and Parts Manual RMW Series Pumps
Service Pumps (Continued)
slide hammer to pull
the packing stack up
and out of the head.
(See Figure 20)
NOTE: Damage to
the piston guides and
or the seals may occur during
removal. Inspect carefully before
reusing any components of the
packing stack.
9. Remove the high-
pressure packing by
pulling straight out
with your fi nger.
(See Figure 21)
Assembly:
1. Install the high-pressure seal into
the head.
NOTE: It should fi t snugly. The
packing support is part of the
valve cage.
2. Place the high-
pressure seal at an
angle and work it
into the cylinder.
(See Figure 22)
NOTE: The point of the
“V” or fl at side of the packing is
pointed at you.
3. Lubricate the packing retainer
O-ring with a light fi lm of oil and
install it into the
cylinder. Push it
completely into
place. (See Figure
23)
NOTE: The O-ring
will seat just inside the
manifold and you will
hear a slight pop.
4. Insert the low-
pressure seal by
placing it into the
cylinder in at an
angle and pushing it into
place.
(See Figure 24)
5. Put a thin coat of oil
on the plungers and
packings.
(See Figure 25)
6. Carefully install the
manifold and
torque the bolt
to the proper
specifi cations.
(See Figure 26)
Valve life is dependant
on many variables. Hard
water, cavitation, corrosion,
chemicals and equipment care. The
valves are a wear item and need
periodic replacement. Worn O-rings
or damaged valves will cause pressure
loss and pulsations.
NOTE: Water seals are wear items.
Life of the seals is dependent on
Figure 22
.
Figure 20
Figure 26
it
i
nt
o
Figure 24
Figure 21
Figure 25
g
Figure 23