REPAIR KIT
DESCRIPTION
KIT A, 348U, 350U, 357U
348U | 350U | 357U
PART NO. QTY
10013
DESCRIPTION
KIT B
PART NO. QTY
10004
Plunger
1
White Washer, 1/2” ID
8
O-Ring, 1-117
2
Valve Assembly
4
Seal Ring, 1-124
2
O-Ring, 1-116
4
Plunger Guide
2
Retainer Plate
*
2
Support Ring, 1-116
4
Pump Head
*
2
U-Cup
2
Pump Manifold
*
1
O-Ring, 1-024
4
( ) Sold only as part of a kit. | (*) Not part of a kit, for identification only.
A DOWNLOADABLE VERSION OF THE PARTS LIST AND DISSASEMBLY/REASSEMBLY
INSTRUCTIONS IS AVAILABLE UNDER THE DOWNLOADABLE DOCUMENTS TAB.
700 McKinley St. NW | Anoka, MN 55303 |763.433.0303 or 866.857.7078|www. pumptec.com
DISASSEMBLY/REASSEMBLY
1. Remove pump from motor using a
3/16” hex wrench for Model 348U, and
use 5/16” hex wrench for Models 350U
and 357U. Remove bolts at each end of
pump. Turn pump over so manifold is
facing upward. Place manifold to side as a
reference for reassembly.
Figure 1
2. Holding each head, pull them apart to
remove plunger. Remove retaining plate
from pump head. Remove internal seal
parts with finger. Discard parts, keeping
the head and retainer plate.
5. Place vacuum seal O-ring around vacuum seal. Lightly grease O-ring and press
into recess in retaining plate. Be careful to
apply even pressure and eliminate bulges
in O-ring.
348U | 350U | 357U
10. 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 to not lose the white washers in
the manifold during reassembly.
Figure 4
Figure 7
6. Grease edge of retaining plate and slide
into place. If large retainer O-ring dislodges, do not slide plate, but push O-ring
back into place before sliding into place
completely.
11. Turn assembly over and place shorter
bolt and washer assembly into heads and
tighten finger tight. DO NOT tighten completely at this time.
Figure 8
12. Install black grease from included
packet into corners and center of plunger
slot as shown.
Figure 5
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. Note
the order and orientation of repair parts
prior to installation.
4. Place one O-ring support, u-cup and
u-cup support ring into bore. Verify that
u-cup support ring is flush with top of
u-cup. Place guide O-ring around guide
and lightly grease. Press guide with O-ring
installed into bore. Place retainer O-ring
into recessed area around top of bore.
7. Repeat the previous steps 3-5 with the
other head.
8. Lightly grease the plunger with provided grease in small clear 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.
9. Adjust plunger slot position towards
center and have slot facing work surface.
Replace all valves, O-rings and white
washers. Refer to image and manifold
label to understand proper orientation.
Figure 9
13. Mount pump back onto motor and
tighten mounting bolts to 14 in/lbs. of
torque. Tighten head bolts to 14 in/lbs. of
torque.
Figure 6
Figure 3
700 McKinley St. NW | Anoka, MN 55303 |763.433.0303 or 866.857.7078|www. pumptec.com