DIAPHRAGM PUMP
The diaphragm pump included
with your machine is the latest
from the pump manufacturer.
IMPORTANT:
Spare parts order
for your Diaphragm Pump.
When placing a spare parts
order, please inform us that your
machine is including the new
version of the diaphragm pump,
which includes integrated bypass
in the upper housing, and the
check valve does not include
orifices for relief.
KEY
DESCRIPTION KEY
DESCRIPTION
1
Bypass Screws
6
Diaphragm/Cam Bearing Assembly
2 Adjustable
Bypass
7 Motor
Assembly (Less Base Plate)
3
Pump Screws
8
Motor Rear End Bell Assembly
4
Upper Housing
9
Base Plate/Grommet Assembly
5
Check Valve Assembly (with O-ring)
10
Bearing Cover
DISASSEMBLE REASSEMBLE
Pump
Housing
1. Disconnect power to the pump motor.
2. Remove the four recessed pump-housing screws
(3) located on top of pump housing (4).
3. Remove the pump housing (4) from diaphragm
lower housing assembly.
Check Valve Assembly (5)
4. The check valve housing and O-ring (5) located
in the upper housing (4) or on the diaphragm
cam assembly (5).
5. If in upper housing, remove by placing a small
flat blade screwdriver between the upper
housing and check valve housing and pry out.
Diaphragm/Cam Assembly (6)
6. Remove two deep-set phillips head screws (6).
7. Rotate bearing cover (10), so access notch is
aligned with cam bearing screw, loosen
setscrew with a 1/8
″
Allen wrench and slide
pump lower housing assembly from motor shaft.
8. After removing the cam bearing from the outer
piston set, the inner piston screws are now
visible, remove both flat head screws. The outer
piston set can now be removed from the inner
pistons.
Diaphragm/Cam Assembly (6)
1. Place hex stem of inner pistons through the
diaphragm and the openings in the bearing cover
(10) and into piston set.
2. Center pistons in diaphragm and install two flat
head screws.
3. Place cam bearing over outer piston set aligning
locating pins into the holes of the cam bearing
housing.
4. Install round head screws and tighten securely.
Bearing Cover (10)
5. Coat motor shaft with grease prior to installing the
diaphragm/cam bearing assembly (6) to motor.
6. Attach cam-bearing assembly to motor shaft by
aligning shaft indentation with setscrew and tighten
securely. (Rotate access notches down toward the
base plate.)
7. Install and tighten two phillips head screws to
motor (torque 25
in
/
lbs
.)
Check Valve Assembly (5)
8. Install check valve with new O-ring over the pistons
in diaphragm, discharge side up (side with center
circle up).
Pump Housing (4)
9. Place pump housing (4) over the check valve and
align the four screw holes with bearing cover.
10. Install the four phillips head screws (3) into the
bearing cover and cross tighten securely.
35