Pumptec ELECTRIC SPRAYER 12V - Manual (Page 11)

11 Version 110112
Pumptec Operating Instructions and Parts Manual 12V ELECTRIC SPRAYER
through the lengths of hose. For example, a 3 gPM system will
require (lose) 50 PSI per 50 ft. of 3/8” ID hose. A pump with only
60-70 PSI may not provide the desired performance at the end of
the hose. See reference charts to assist in system design.
MAINteNANce
DISASSEMBlY AnD REASSEMBlY
InSTRUCTIOnS (Refer to Schematic)
1. Remove pump from motor using a 3/16” hex wrench for
Model 348U, and use 5/16” hex wrench for Model 20C832.
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.
Figure 2
3. Clean the head with a rag or towel inspect for damage or ex-
cess 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.
Figure 3
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.
Figure 4
6. grease edge of retaining plate and slide into place. If large re-
tainer O-ring dislodges, do not slide plate, but push O-ring back
into place before sliding into place completely.
Figure 5
7. Repeat the previous steps 3-5 with the other head.
8. lightly grease the plunger with provided grease in small clear