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NOTE
Inspect chamber of rod for damage.
Chamber should be smooth and not
rough. If rough and not smooth, rod (19)
must be replaced.
Failure to inspect may result in
damage to seals.
Clean and inspect
1 Clean all metal parts in cleaning solvent.
Solvent should be environmentally safe.
2 Inspect all parts for wear and/or damage.
2.1
Replace as necessary.
3 Inspect air piston (7) for fatigue cracks.
3.1
Replace as necessary.
4 Inspect rod (19) closely. Use a magnifying
glass to detect any score marks.
4.1
Replace as necessary.
5 Closely inspect mating surfaces of all
check valve components for any
imperfections. Ensure a smooth and
clean contact is obtained when
assembled. Example: place ball (29)
into foot valve body (31). Fill foot valve
body with solvent. Make sure no
leakage occurs.
Assembly
NOTE
Prior to assembly, certain components
require lubrication (→ Table 2).
Refer to Fig. 3 (page 9) for a section
view of pump tube.
Foot valve body
1 Install o-ring (30) onto foot valve
body (31).
2 Install ball (29), spring (28), small
diameter first, and washer (27) into
foot valve body.
3 Install pin (32) into foot valve.
3.1
Make sure pin retains washer
properly and is flush with foot
valve body.
Lubricated components
Item
Description
Clean oil
8
O ring,
9
Quad ring, 2
10
O ring, 2
14
Seal, 1
16
Seal, 1
20
O ring, 1
21
Block V packing
25
O ring, 2
30
O ring, 2
Coat bore of air motor assembly with PTFE grease.
1)
Part number 393590 is a 0.75 ounce (21.8 g) tube of PTFE grease.
10
4 Install o-ring (10) onto upper groove
of body (11).
5 Install and seat seal (14), heel end first,
into bottom of body.
6 Install and seat bearing (15), small
diameter first, into body.
7 Install and seat seal (16), heel end first,
into body.
8 Install and seat washer (17) into body.
9 Install retaining ring (18) into body.
10 Install o-ring (25) into groove of body.
Rod
11 Install o-ring (20) into groove of rod and
plug assembly (19).
12 Install block-v packing (21), lips upward,
onto short end of piston (22).
13 Install piston assembly onto rod and plug
assembly.
13.1 Use care not to damage o-ring.
14 Install ball (23) into rod and plug
assembly.
3
/
in ID ×
1
/
in OD
8
2
5
/
in ID × 3 in OD
8
/
in ID × 3 in OD
3
4
/
in ID × 1
/
in OD
5
7
8
8
5
/
in ID × 2 in OD
8
/
in ID × 1
/
in OD
3
1
8
2
/
in ID × 2
/
in OD
1
7
4
16
/
in ID × 2
/
in OD
1
5
8
16
1)
Table 2
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