700 McKinley St. NW | Anoka, MN 55303 |763.433.0303 or 866.857.7078|www. pumptec.com
DISASSEMBLY/REASSEMBLY 113C
Maintenance
DISASSEMBLY AND REASSEMBLY
INSTRUCTIONS (Refer to Schema c)
1. Remove pump from motor using a
3/16” hex wrench. Remove bolts from
pump. Turn pump over so manifold is
facing upward. Place manifold to side as
a reference for reassembly.
Figure 1 shows pump separate from mo-
tor. Manifold facing upward and set to
side.
Figure 1
2. When disassembling the pump note
the order and orienta on of the parts.
Holding each head, pull them apart to
remove plunger. Remove retaining plate
from pump head. Remove internal seal
parts with nger. Discard parts, but
keep head and retaining plate. Figure 2
shows pump heads pulled apart showing
plunger, retaining plate and internal seal.
Figure 2
3. Clean the head with a rag or towel.
Inspect for damage or excess corrosion. If
the head is damaged, do not rebuild.
Figure 3 shows repair parts in order and
in correct orienta on.
Figure 3
4. Assemble Cartridge. A) Slip/slide black
rubber O-ring (the top ring) onto brown
cartridge and into the groove in the
middle of cartridge un l O-ring is seated
all the way around cartridge.
B) Place black polybak (item below
brown cartridge) into end of cartridge
un l it is fl ush with cartridge. C) The
cartridge should now appear like the one
on the right.
Figure 4
5. Place the assembled cartridge into the
bore of pump head, pressing into the
bore un l it will not go any further.
Figure 5
6. Taking the 2 retainer plates, slide one
on each side of cartridge, groove side up
as shown in Figure 6 .
Figure 6 Figure 7
7. Slide both plates from each side of
head, push ght against the brown
cartridge as shown in Figure 7.
8. Lightly grease the plunger with the
clear grease provided in small grey tube.
Slide plunger into one head assembly and
then slide the other head onto plunger.
Place head and plunger assembly on
work surface with valves facing upward.
Figure 8 shows plunger in one head as-
sembly with other head in posi on above
plunger.
Figure 8
8. Adjust plunger slot posi on towards
center and have slot facing work surface.
Replace all valves, O-rings, and ½” ID
white washers. Refer to image and
manifold label to understand proper
orienta on. Figure 9 shows proper
orienta on with valves, O-rings and ½” ID
white washers in place.
Figure 9
9. Place manifold on top of plunger and
head assembly. It may be necessary to
move heads on plunger to have valves
align with valve pockets on manifold. Be
careful not to lose the O-rings and valves
or the white gaskets in the manifold
during reassembly. Figure 10 shows
moving heads on plunger to align with
valve pockets. You may hear a click when
everything is aligned.
10. Turn assembly over and place shorter
bolts and washer assembly into heads
and ghten nger ght. DO NOT ghten
completely at this me.
Figure 10
11. Apply black grease from supplied
packet into corners and center of plunger
slot.
12. Mount pump back onto motor and
ghten moun ng bolts to 14 in/lbs. of
torque. Tighten head bolts to 14 in/lbs.
of torque.
