Overhaul
NOTE
Refer to fig. 3, page 12 and
IPB 1, page 14 for component
identification on all overhaul procedures.
Prior to performing any maintenance
procedure, the following safety precautions
must be observed. Personal injury may
occur.
WARNING
Do not use halogenated hydrocarbon
solvents such as methylene chloride or
,,-trichloroethane in this pump.
An explosion can result when aluminum
and/or zinc-plated parts in pump come
in contact with halogenated hydrocar-
bon solvents.
Release all pressure within system
prior to performing any overhaul
procedure.
• Disconnect air supply line from pump
motor.
• Into an appropriate container, oper-
ate control valve to discharge
remaining pressure within system.
Never point a control valve at any
portion of your body or another person.
Accidental discharge of pressure and/or
fluid can result in injury.
Read each step of instructions care-
fully. Make sure a proper understanding
is achieved before proceeding.
Disassembly
Separate air motor from
pump tube
1
Clamp pump assembly in a soft-jaw vise at
bung adapter (22) or body (8).
2 Remove cover (1a).
2.1 Pry and swing cover sideways away
from cylinder (→ SER 670782 for
details).
3 Remove screw (1b) from top cap.
4 Remove nuts (1d) that secure body to air
motor assembly (1).
5 Remove carriage bolts (1c) from top cap.
5.1 Remove keepers (9) from body.
6 Remove the cap from the cylinder.
CAUTION
Remove cylinder with care.
Damage to quad-ring (6) and/or
o-ring (7) can occur.
7 With a side-to-side motion, pull cylinder
from body and air piston (4).
8 Remove o-ring (7) from body.
9 Remove bottom cap from body.
Pump tube assembly
Tube assembly
1 Unscrew tube (21) from body.
Step for model and -m only:
2 Remove bung adapter from tube as
required.
3 Remove o-ring (19) and back-up
ring (20) from tube.
Air piston assembly
4 Remove screw (2) that secures air
piston (4) to rod (15).
4.1 Remove air piston from rod.
5 Remove washer (3) quad-ring (6), and
o-ring (5) from air piston.
Rod assembly
6 Pull rod assembly from bottom of body.
7 Unscrew valve seat (18) from rod.
7.1 Remove ball (17) and nylon piston (16).
Body assembly
8 Remove o-ring (7) from body.
9
Remove washer (14), spacer (13) and seal
(12) from body.
10 Remove bearing (11) and seal (10) from
body.
Step for model -M only:
11
Unscrew adapter (29) from body only when
necessary.
11.1
Adapter is secured with threadlocker.
Foot valve assembly
12 Unscrew foot valve (27) from tube (21).
13 Remove o-ring (26) from foot valve.
14 Remove pin (28) from foot valve.
15
Remove washer (23), spring (24), and ball
(25) from foot valve.
Clean and inspect
NOTE
Use appropriate repair kit for replace-
ment parts. Make sure all components
are included in kit before discarding
used parts.
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 (4) for fatigue cracks.
3.1 Replace as necessary.
4
Inspect nylon piston (16) and rod (15) closely.
Use a magnifying glass to detect any
score marks on the rod.
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 (25) into
foot valve (27). Fill foot valve with solvent.
Make sure no leakage occurs.
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