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Pump tube
13 Remove lower rod assembly from
bottom of lower tube (23).
14 Unscrew nut (29) from lower rod.
15 Remove valve plate (28), spacer (27)
from lower rod.
16 Remove lower valve seat (26),
support ring (25), and u-cup seal (9)
from lower rod.
17 Remove u-cup seal (9) and support
ring (25) from lower valve seat (26).
18 Remove guide (24) from lower rod.
19 Unscrew upper tube (17)
from lower tube (23).
20 Remove o-ring (16) from upper tube.
21 Remove valve stop (18) from lower tube.
22 Remove check valve (20) with u-cup
seal (19) from lower tube.
23 Remove u-cup seal (19) from
check valve (20).
24 Remove upper valve seat (22) and
o-ring (21) from lower tube.
Clean and inspect
NOTE
Use appropriate repair kit for
replacement parts. Make sure all
components are included in kit before
discarding used parts.
1 Clean all metal parts in a modified
petroleum-based solvent.
Solvent should be environmentally safe.
2 Inspect all parts for wear and/or
damage, such as nicks and/or cracks.
Replace as necessary to ensure
proper seal.
3 Inspect lower rod (15) closely.
Use magnifying glass to detect any score
marks. Replace as necessary.
4 Closely inspect mating surfaces of both
check valve components for any
imperfections to ensure smooth and
clean contact is obtained when
assembled.
5 Inspect lower portion of guide (24)
for grooves. Replace as necessary.
6 Inspect valve stop (18) for signs of
breakage. Ensure valve stop seats
properly in counterbore of
upper tube (17).
11
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