Pumptube assembly
Air\piston
1 Remove nut (2) and washer (3) that
secures air piston (4) to rod (9). Place a
punch or similar tool into the rod to
prevent its rotation (†fig. 2-A).
2 Remove the air piston from the rod.
3 Remove quad-ring (5) from the air
piston.
4 Remove o-ring (6) and washer (7) from
the rod.
Body assembly
1 Unscrew Upper Tube (18) from the Body.
2 Remove the Body assembly from the
Rod.
3 From inside the Body remove:
–Gasket (16)
–Bearing (15)
–Seal (14)
–Lantern Ring (13)
–Seal (12)
Tube assembly
1 Push the rod assembly downward
through uppertube (18) until primer disk
(35) protrudes from primer body (42).
2 Remove roll pin (36) that secures the
primer disk to primer rod (34).
3 Remove the primer disk from the primer
rod.
4 Remove the entire rod assembly from
the top of the upper tube.
5 Remove roll pin (25) thatsecuresthe
primer rod to piston (24).
6 Unscrew the primer rod from the piston.
Step for model 9911-1 only
7 Remove roll pin (25) that secures rod (9)
to the piston.
8 Unscrew the piston from the rod.
Step for all models except
9911-1
9 Remove roll pin (25) that secures rod (9)
to the extension.
10 Unscrew the extension from the rod.
11 From inside the piston remove: spring
guide (21), spring (22), ball (23).
12 Unscrew the uppertube from lower
tube (29). Use a strap wrench.
Lower tube
1 Remove gasket (28), bearing (26),
seal (27), and additional bearing (26)
from the lowertube.
Primer body
1 Unscrew primer body (37) from the
lowertube.
2 From inside the lowertube remove:
gasket (28), seat (33), additional
gasket (28), foot valve (32)
[with seal (31)], stop (30).
3 Remove the seal from the foot valve.
Clean and inspect
1 Clean all metal parts in cleaning solvent.
The solvent should be environmentally
safe.
2 Inspect all parts for wear and/or damage.
3 Replace as necessary.
4 Inspect air piston (4) for fatigue cracks.
5 Replace as necessary.
6 Inspect rod (9), piston (24), and primer
rod (34) closely. Use a magnifying glass to
detect any score marks.
7 Replace as necessary.
8 Closely inspect the mating surfaces of all
check valve components for any imperfec-
tions. Ensure a smooth and clean contact
is obtained when assembled.
Assembly
EXAMPLE
Place Ball (23) into Piston (24). Fill the Piston
with solvent. Make sure no leakage occurs.
NOTE
Prior to assembly, certain components
require lubrication. Refer to table 3 for
details. Refer to fig. 4 for a section view of the
pump tube assembly.
Table 3
Lubricated components
Item Description
Clean oil
5 Quad-ring, 2 5/8in. ID x 3 in. OD
6 O-ring, 3/8in. ID x 1/2in. OD
8 O-ring, 2 3/4in. ID x 3 in. OD
12 Seal, 1/2in. ID x 3/4in. OD
14 Seal, 1/2in. ID x 7/8in. OD
17 O-ring, 2 9/16 in. ID x 2 3/4in. OD
27 Seal, 5/8 in. ID x 1 in. OD
31 Seal, 0.282 in. ID x 0.532 in. OD
Magnalube®-G PTFE grease1)
Coat bore of air motor assembly
1) Part number 393590 is a 0.75 Ounce (21.8 Gm) tube of
Magnalube®-G PTFE grease.
Pump tube assembly
Lower tube
1 Install an D seat seal (12) [heel end first]
into the bottom of the body.
2 Install and seat lantern ring (13) [small
diameter end first] into the body.
3 Install and seat seal (14) [heel end first]
into the body.
4
Install and seat bearing (15) [small diam-
eter end first] into the body.
5 Install and seat gasket (16) into the body.
Step for all models except 9911-1
6 Screw rod (9) into extension (19) until
the pinholes align.
7 Secure the extension to the rod with roll
pin (20).
8 Install ball (23), spring (22), and spring
guide (21) [pointed end first] into
piston (24).
Step for model 9911-1 only
9Screw the piston assembly onto the rod
until the pinholes align.
4