SER 9968
Low-Pressure Stub Pump
Revision (8-10)
6
Alemite, LLC
Overhaul
NOTE
: Refer to
Figures 2
and
3
for compo-
nent identification on all overhaul proce-
dures.
Prior to performing any maintenance procedure, the
following safety precautions must be observed. Personal
injury may occur.
WARNING
Do not use halogenated hydrocarbon sol-
vents such as methylene chloride or 1,1,1-trichlo-
roethane in this pump. An explosion can result
when aluminum and/or zinc-plated parts in the
pump come in contact with halogenated hydrocar-
bon solvents.
Release all pressure within the system prior to
performing any overhaul procedure.
• Disconnect the air supply line from the pump
motor.
• Into an appropriate container, operate the
control valve to discharge remaining pressure
within the 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 the instructions carefully. Make
sure a proper understanding is achieved before
proceeding.
Disassembly
Separate Air Motor from Pump Tube
1. Clamp the pump assembly in a soft-jaw vise at
Bung Adapter (
22
) or Body (
8
).
2. Remove Cover (
1a
).
• Pry and swing the Cover sideways away from the
Cylinder
.
• Refer to SER
339413
for details.
3. Remove Screw (
1b
) from the
Top Cap
.
4. Remove Nuts (
1d
) that secure the Body to Air Motor
Assembly (
1
).
5. Remove Carriage Bolts (
1c
) from the
Top Cap
.
• Remove Keepers (
9
) from the Body.
6. Remove the
Top Cap
from the
Cylinder
.
CAUTION
Remove the Cylinder with care. Damage to Quad-
Ring (6) and/or O-Ring (7) can occur.
7. With a side-to-side motion, pull the
Cylinder
from the
Body and Air Piston (
4
).
8. Remove O-Ring (
7
) from the Body.
9. Remove the
Bottom Cap
from the Body.
Pump Tube Assembly
Tube Assembly
1. Unscrew Tube (
21
) from the Body.
Step for Model 9968 and 9968-M Only
2. Remove the Bung Adapter from the Tube as required.
3. Remove O-Ring (
19
) and Back-Up Ring (
20
) from the
Tube.
Air
Piston Assembly
4. Remove Screw (
2
) that secures Air Piston (
4
) to
Rod (
15
).
• Remove the Air Piston from the Rod.
5. Remove Washer (
3
) Quad-Ring (
6
), and O-Ring (
5
)
from the Air Piston.
Rod Assembly
6. Pull the Rod assembly from the bottom of the Body.
7. Unscrew Valve Seat (
18
) from the Rod.
• Remove Ball (
17
) and Nylon Piston (
16
).
Body Assembly
8. Remove O-Ring (
7
) from the Body.
9. Remove Washer (
14
), Spacer (
13
) and Seal (
12
) from
the Body.
10. Remove Bearing (
11
) and Seal (
10
) from the Body.
Step for Model 9968-M Only
11. Unscrew Adapter (
29
) from the Body only when
necessary.
• Adapter is secured with Loctite 242.
